US9956609 — METAL SORTING, MELTING AND FABRICATION APPARATUS AND METHODS — Melt Cognition, LLC (USA) — According to some aspects, a system for producing a target molten metal composition is provided. The system includes a sorting device that sorts input pieces of metal based on a control signal. Sorted pieces of metal are melted in a furnace, and a sensor measures the composition of molten metal in the furnace and, in response, generates a control signal that is sent to the sorting device. In the secondary aluminum industry, this system significantly reduces the use of virgin metal to produce a desired purity level in ingots manufactured at the secondary plant.
US9506869 — HANDHELD LASER INDUCED BREAKDOWN SPECTROSCOPY DEVICE — TSI, Incorporated (USA) — A novel device, method and systems disclosed managing the thermal challenges of LIBS laser components and a spectrometer in a handheld structure as well the use of simplified light signal collection which includes a bare fiber optic to collect the emitted light in close proximity to (or in contact with) the test material. In one example embodiment of the handheld LIBS device, a burst pulse frequency is 4 kHz is used resulting in a time between pulses of about 250 .mu.s which is a factor of 10 above that of other devices in the prior art. In a related embodiment, an active Q-switched laser module is used along with a compact spectrometer module using a transmission grating to improve LIBS measurement while substantially reducing the size of the handheld analyzer.
US9945009 — PROCESSES FOR RECOVERING RARE EARTH ELEMENTS FROM ALUMINUM-BEARING MATERIALS — Orbite Technologies Inc. (Canada) — The present disclosure relates to processes for recovering rare earth elements from an aluminum-bearing material. The processes can comprise leaching the aluminum-bearing material with an acid so as to obtain a leachate comprising at least one aluminum ion, at least one iron ion, at least one rare earth element, and a solid, and separating the leachate from the solid. The processes can also comprise substantially selectively removing at least one of the at least one aluminum ion and the at least one iron ion from the leachate and optionally obtaining a precipitate. The processes can also comprise substantially selectively removing the at least one rare earth element from the leachate and/or the precipitate.
US9920992 — MOLTEN METAL SCRAP SUBMERGENCE APPARATUS — Pyrotek, Inc. (USA) — This invention relates to an improved method and apparatus for melting metal scrap such as aluminum, especially lightweight scrap such as aluminum food and beverage containers, machining chips, and saw filings, that is difficult to submerge in a molten bath and thus difficult to melt. A metal scrap submergence device comprises an open top chamber including walls of a heat resistant material, an inlet positioned in a side wall of the chamber, an outlet positioned in the base of said chamber, and a ramp adjacent said side wall of the chamber. The side wall further includes a feature affecting molten metal flow. The feature can include, for example, a baffle, a vane, a passage, a diverging or converging shape and combinations thereof. Similarly, the molten metal flow can be affected by slanting the ramp inwardly or outwardly.
US9803922 — SYSTEM AND METHOD FOR MELTING LIGHT GAUGE SCRAP — Altek L.L.C. (USA) and Altek Europe Ltd. (GB) — The technology of the present disclosure relates generally to melting pieces of metal stock and, more particularly, to a reverberatory furnace system for melting light gauge aluminum stock with improved throughput. An exemplary furnace system for melting stock metal includes a main hearth and a side well subsystem, which includes a melting well downstream of the main hearth for receiving flow from the main hearth, an input flow inducer disposed upstream of the melting well and downstream of the main hearth, and an output flow inducer disposed downstream of the melting well and upstream of the main hearth. The input flow inducer drives molten metal into the melting well, thereby forming a differential metal head in the melting well. The output flow inducer evacuates molten metal from an output conduit, thereby reducing counter-pressure at an output port of the melting well communicating with the output conduit. This allows atmospheric pressure to add to the differential metal head in the melting well, resulting in an increase in productivity of the side well subsystem and of the furnace system as a whole.
US9702022 — PROCESS AND SYSTEM FOR DE-COATING OF ALUMINUM SCRAP CONTAMINATED WITH ORGANIC COATINGS — Industrial Furnace Company (USA) — A method for removal of organic coatings from loose aluminum scrap includes passing the scrap through a Multiple Hearth Furnace operatively maintained in the range of 500oF-1600oF. Each hearth in the furnace is independently temperature controlled and held under a slightly negative pressure environment. The hearths heat the scrap such that pyrolysis of the coatings occurs within the hearth. Organic compounds liberated during this process are partially or entirely consumed within the furnace combustion products are exhausted through the top. Hydrogen fluoride contained in the products of combustion is incinerated prior to final discharge from the system and routing to additional environmental equipment for particle removal. Scrap is continuously fed into the top of the furnace and agitated and mechanically moved within each hearth toward an output of another hearth situated below. The agitation and movement of the scrap exposes the scrap to the hearth atmosphere to assist in processing of the scrap. The discharge of the scrap in the final hearth supplies hot (250oF-900oF), clean material for the next step in the process for secondary aluminum recycling.
US9580356 — SELF-FOAMING GEOPOLYMER COMPOSITION CONTAINING ALUMINUM DROSS — Construction Research & Technology, GmbH (Germany) — The present invention relates to a self-foaming geopolymer composition containing aluminum dross. It furthermore relates to the use of that geopolymer composition for the production of geopolymer foams and/or foamed geopolymer products. The self-foaming geopolymer composition comprises at least one hydraulic binder, at least one binder selected from latent hydraulic binders, pozzolanic binders, and mixtures thereof, at least one alkaline activator, and aluminum dross. It moreover relates to the use of that geopolymer composition for the production of geopolymer foams and/or foamed geopolymer products.
US9556500 — PROCESSES FOR TREATING RED MUD — Orbite Technologies Inc. (Canada) — The present disclosure relates to improvements in the field of processes for treating industrial waste materials. For example, it relates to processes for treating red mud. For example, these processes can be effective for extracting various materials from red mud such as alumina and various metals and oxides thereof, silica, rare earth elements, rare metals etc. There are provided processes for treating red mud. For example, the processes can comprise leaching red mud with HCl so as to obtain a leachate comprising ions of a first metal (for example aluminum) and a solid, then separating said solid from said leachate. Several other metals can be extracted from the leachate (Fe, Ni, Co, Mg, rare earth elements, rare metals, etc.). Various other components can be extracted from solid such as TiO2, SiO2, etc.
US9534274 — METHODS FOR PURIFYING ALUMINUM IONS — Orbite Technologies Inc. (Canada) — The present disclosure relates to improvements in the field of chemistry applied to the purification of aluminum ions and/or manufacture of aluminum-based products. There are provided processes for purifying aluminum ions. Such processes comprise precipitating the aluminum ions under the form of Al(OH)3 at a first pH range; converting Al(OH)3 into AlCl3 by reacting Al(OH)3 with HCl and precipitating said AlCl3; and heating the AlCl3 under conditions effective for converting AlCl3 into Al2O3 and optionally recovering gaseous HCl so-produced. The processes can also comprise converting alumina into aluminum. The aluminum ions can be obtained by leaching aluminum-containing materials, for example, aluminum-containing ore. The aluminum-containing ore can be chosen from alumino-sillicate minerals, clays, argillite, nepheline, mudstone, beryl, cryolite, garnet, spinel, kaolin, bauxite and mixtures thereof. The aluminum-containing material can also be a recycled industrial aluminum-containing material such as slag or dross, red mud, or fly ash.
US9435004 — WASTE HANDLING METHODS AND APPARATUS — Altek Europe Limited (GB) — Apparatus and a method of handling a molten metal processing by-product, the by-product having an aluminum content of less than 25% by weight and the by-product having a salt content of 10% to 75% by weight, are provided in which the by-product is placed in a container unit and put in the apparatus, the apparatus including an element having a first position outside of the container and a second position in which at least a part of the element is in the container so as to compress the by-product and exclude oxygen from it. The element also serves to transfer heat from the contents of the container unit to the element and so provide cooling. The element can then be returned to the first position, the container unit be removed and placed at a cooling location for final cooling.
US9382595 — METHOD FOR THE PRODUCTION AND THE PURIFICATION OF MOLTEN CALCIUM ALUMINATE USING CONTAMINATED ALUMINUM DROSS RESIDUE — 9253-8444 QUEBEC INC. (Canada) — The present invention provides a process for the preparation of pre-melted calcium aluminate for iron and steel treatment and protection by the fusion of aluminum dross residues, usually referred to as non-metallic products (NMP) containing variable levels of aluminum (Al) and aluminum nitride (AlN) with calcium carbonate at high temperature, under oxidizing atmosphere. It further relates to the purification of the molten calcium aluminate from some contaminants present in the dross residue. The pre-melted calcium aluminate material produced under these conditions has been shown to be stable, inert, non-dusty and environmentally benign according to various EPA leaching tests for metals and fluorides, and highly suitable for various iron and steel treatment and protection applications.
US9360253 — METAL KILN TEMPERATURE CONTROL SYSTEM AND METHOD — Gillespie + Powers, Inc. (USA) — This invention relates principally to a metal furnace or kiln, and more particularly to a temperature sensing and control system and method for rotary aluminum delacquering kilns using wireless thermocouples or comparable temperature sensing devices. A rotary aluminum kiln temperature regulation system comprises a temperature sensing device in the kiln that is configured to take temperature readings in an area of the kiln in proximity to the temperature sensing device. The system includes a wireless transmitter operatively associated with the temperature sensing device and a receiver wirelessly associated with the transmitter, such that the transmitter and receiver wirelessly transmit the temperature readings taken by the temperature sensing device from the transmitter to the receiver. The system also includes a control unit operatively connected to the receiver that is configured to receive the transmitted temperature readings and determine when the transmitted temperature readings exceed a predefined temperature set point. The control unit operates one or more forward feed control loop subsystems that assist in safely operating the kiln in accord with a predetermined temperature profile programmed into the unit.
US9290828 — PROCESSES FOR PREPARING TITANIUM OXIDE AND VARIOUS OTHER PRODUCTS — Orbite Technologies Inc. (Canada) — There are provided processes for preparing various products from various materials. For example, such processes are effective for extracting titanium or aluminum from various materials, thereby allowing for preparing products such as titanium chloride and titanium oxide or aluminum chloride and alumina. These processes can comprise leaching the starting material with HCl so as to obtain a leachate and a solid. The solid can be treated so as to substantially selectively extract titanium therefrom while the leachate can be treated so as to substantially selectively recover a first metal chloride therefrom.
US9285113 — DISTRIBUTED COMBUSTION PROCESS AND BURNER — L’Air Liquide, Societe Anonyme pour l’Etude et Exploitation des Procedes Georges Claude (France), American Air Liquide, Inc. (USA), and Air Liquide Advanced Technologies U.S. LLC (USA) — Oxy-combustion of fuels is a known strategy for increasing heat utilization (thermal efficiency) in industrial furnaces relative to air-based combustion. Oxy-fuel burners have higher flame temperatures which increase radiative heat transfer from the flame to the load. Higher flame temperatures, however, can have negative consequences in certain circumstances, especially for lower temperature furnaces such as for secondary aluminum melting. Due to the high flame temperature, the propensity of NOx formation is increased. To overcome the above issues, distributed combustion has been developed as a strategy for performing oxy-combustion at lower but very uniform temperatures. A burner of this invention has fuel/oxidant nozzles and a pair of dynamical lances spaced on either side thereof that inject a jet of fuel and primary oxidant along a fuel injection axis, and jets of secondary oxidant, respectively. Jets of actuating fluid impinge against the jets of secondary oxidant to fluidically angle the jets of secondary oxidant away from the fuel injection axis. The action of the angling away together with staging of the oxidant between primary and secondary oxidant injections allows achievement of distributed combustion conditions.
US9260766 — DROSS COOLING SYSTEM AND COOLING METHOD — Altek, L.L.C. (USA) — Embodiments of an aluminum dross cooling head are disclosed. The cooling cooperates with a material container encapsulate dross and reduce thermiting of the dross. In one embodiment, the cooling head also serves as a compression head when forced into the dross by a cooperating dross press assembly.
US9181603 — PROCESSES FOR TREATING FLY ASHES — Orbite Technologies Inc. (Canada) — There are provided processes for treating fly ash. For example, the processes can comprise leaching fly ash with HCl so as to obtain a leachate comprising aluminum ions and a solid, separating the solid from the leachate, reacting the leachate with HCl so as to obtain a liquid and a precipitate comprising the aluminum ions in the form of AlCl3, and separating the precipitate from the liquid. Then heating the precipitate under conditions effective for converting AlCl3 into Al2O3 and optionally recovering gaseous HCl so-produced.
US9169531 — RECYCLING METHOD FOR ALUMINUM DUST COLLECTION AND ALUMINUM METALLIC SMELTING SLAG — Jia Xie Metal Co., Ltd. (Taiwan) — The present invention is a recycling method for aluminum dust collection and aluminum metallic smelting slag, where aluminum dross is processed into dross pellets having a particle diameter of larger than 200 mesh and smaller than 400 mesh, with which an aqueous solution of a binder is mixed to form a raw material. The raw material is then pressure molded to form a raw refractory material and sintered under a work temperature of 1050oC to 1450oC., then reduced in temperature to finally form a refractory material.
US9091484 — METHOD AND APPARATUS FOR HEATING METALS — Air Products and Chemicals, Inc. (USA) — A method of heating a non-ferrous and/or ferrous metal-containing stock in a furnace with a heating chamber, a charging door, an exhaust stream port and an exhaust stream duct, which includes: a) introducing fuel and an oxygen-containing gas into the heating chamber of the furnace through a burner so that a flame is formed, b) monitoring the signal of at least one optical sensor installed within the heating chamber and/or the exhaust stream duct, c) monitoring the change of the temperature T of the exhaust stream with time (dT/dt), and d) adjusting the fuel:oxygen ratio in step a) as a function of the signal of the flame sensor(s) and dT/dt in the exhaust stream, and, an apparatus designed for implementing said method.
US8985472 — WIRELESS TEMPERATURE SENSING AND CONTROL SYSTEM FOR METAL KILN AND METHOD OF USING THE SAME — Gillespie + Powers, Inc. (USA) — A rotary aluminum kiln temperature regulation system comprising a temperature sensing device in the kiln that is configured to take temperature readings in an area of the kiln in proximity to the temperature sensing device. The system including a wireless transmitter operatively associated with the temperature sensing device and a receiver wirelessly associated with the transmitter, such that the transmitter and receiver wirelessly transmit the temperature readings taken by the temperature sensing device from the transmitter to the receiver. The system also including a control unit operatively connected to the receiver that is configured to receive the transmitted temperature readings and determine when the transmitted temperature readings exceed a predefined temperature setpoint. The control unit is operatively connected to a heat flow control device that can adjust heat flow inside the kiln in proximity to the temperature sensing device, such that the control unit regulates the heat flow control device to maintain a desired level of heat flow in the kiln in proximity to the temperature sensing device in response to the temperature readings transmitted from the temperature sensing device.
US8696348 — ULTRA-LOW NOX BURNER ASSEMBLY — Air Products and Chemicals, Inc. (USA) — Burner assembly comprising (a) an elongated body having a periphery, a discharge end adjacent a combustion zone, and an axis, wherein the axis extends into the combustion zone; (b) one or more oxidant nozzles disposed at the discharge end of the elongated body and adapted to discharge a gaseous oxidant into the combustion zone; and (c) one or more fuel nozzles disposed at the discharge end of the elongated body and adapted to discharge a fuel into the combustion zone. At least one of the oxidant and fuel nozzles is characterized by a shape factor, σ, that is greater than about 10, wherein σ is a dimensionless parameter defined as σ=P2/2A where P is the perimeter dimension of the discharge opening and A is the area of the discharge opening.
US8632621 — METHOD FOR MELTING A SOLID CHARGE — L’Air Liquide, Societe Anonyme pour l’Etude et l’Exploitation des Procedes Georges Claude (France) — The present invention relates to the melting of a solid charge such as glass or metal, and in particular, to the recycling of aluminum through scrap metal melting and refining. A simple, compact burner achieves a more optimal melting of a solid charge followed by performance of combustion under distributed combustion conditions. The burner achieves this by fluidically bending the flame towards the solid charge during a melting phase with an actuating jet of oxidant, redirecting the flame in a direction away from the charge, and staging injection of oxidant among primary and secondary portions during a distributed combustion phase.
US8599899 — AGITATION DEVICE, MELTING APPARATUS AND MELTING METHOD — Toyota Jidosha Kabushiki Kaisha (Japan) — he present invention relates to an agitation device in which a melted matter (for example, cutting chips of nonferrous metal such as aluminum or magnesium) is introduced to molten metal and the molten metal is agitated, a melting apparatus having such agitation device, and a melting method in which a melted matter is introduced to molten metal and the molten metal is agitated so as to melt the melted matter. An agitation device, a melting apparatus, and a melting method for improving melting efficiency of molten metal without contaminating the same are described. The agitation device is provided with a traveling magnetic field generating unit which is disposed outside a charging tank for storing molten metal and generates, inside the charging tank, a magnetic field that travels downward along the rear sidewall of the charging tank. A flow of the molten metal that rotates longitudinally about an axis approximately parallel to the surface of the molten metal is produced in the molten metal. By charging aluminum cutting chips into the molten metal in which the flow is produced, the aluminum cutting chips move with a downward flow of the molten metal and are immersed in the molten metal. As a result, melting of the aluminum cutting chips can be accelerated.
US8404018 — BURNER AND METHOD FOR PROCESSING OXIDIZABLE MATERIALS — Air Products and Chemicals, Inc. (USA) — Burner assembly for use in industrial heating and melting applications of material susceptible to oxidation, such as aluminum, at elevated temperatures is comprised of a flow passage of oxidant surrounded by an annular flow passage of fuel whereby the oxidant is substantially contained inside the fuel layer up to at least 5 oxidant nozzle diameters downstream of the burner outlet in order to minimize contact between the oxidant and the furnace load.
US8388921 — CARBOTHERMIC PROCESSES — Thermical IP Pty Ltd. (Australia) — A mass of solid aluminum carbide containing product is produced by a process in which a mixture is formed of an aluminum containing material including aluminum scrap metal and particles of aluminum dross and a carbonaceous material consisting of, containing or yielding carbon. Then the resulting mixture is heated to a temperature sufficient to react carbon of the carbonaceous material with the aluminum of the aluminum containing material to produce solid aluminum carbide. The solid aluminum carbide then is able to be heated with an aluminum compound selected from Al2O3, Al4CO4, AlO, Al2O and mixtures thereof, to produce aluminum metal and carbon monoxide.
US8313554 — METHOD FOR THE SEPARATION OF MOLTEN ALUMINIUM AND SOLID INCLUSIONS — Aleris Switzerland GmbH (Switzerland) — The invention relates to a method for the separation of molten aluminum and solid inclusions formed from a melt of aluminum containing one or more foreign chemical elements. During the production of aluminum one of the problems is that, depending on its subsequent use, too high a concentration of foreign chemical elements, e.g. Fe, Mn, Si, etc., is present, both when the aluminum is produced from aluminum ore and when recycled aluminum is used. These foreign elements can be removed by cooling molten aluminum, resulting in the formation of inter-metallic compounds or crystals containing only one foreign element as solid inclusions when the molten aluminum containing the foreign elements is hypereutectic. It is an object of the present invention to provide a method for the efficient separation of a dispersion of molten aluminum and solid inclusions, formed from a melt of aluminum containing one or more foreign chemical elements, with which the solid inclusions can be separated from the molten aluminum such that little or no molten aluminum is lost as the molten aluminum surrounding the solid inclusions is replaced by a molten salt.
US7780436 — FLEX-FLAME BURNER AND COMBUSTION METHOD — Gas Technology Institute (USA) — A combustion method and apparatus which produce a hybrid flame for heating metals and metal alloys, which hybrid flame has the characteristic of having an oxidant-lean portion proximate the metal or metal alloy and having an oxidant-rich portion disposed above the oxidant lean portion. This hybrid flame is produced by introducing fuel and primary combustion oxidant into the furnace chamber containing the metal or metal alloy in a substoichiometric ratio to produce a fuel-rich flame and by introducing a secondary combustion oxidant into the furnace chamber above the fuel-rich flame in a manner whereby mixing of the secondary combustion oxidant with the fuel-rich flame is delayed for a portion of the length of the flame.
US7655067 — METHOD FOR PROCESSING ALUMINUM IN A ROTARY OR A REVERBERATING FURNACE — L’Air Liquide-Societe Anonyme a Directoire et Conseil de Surveillande pour l’Etude et l’Exploitation des Procedes Georges Claude (France) — The invention relates to a method for processing aluminum in a furnace consisting in introducing an aluminum-containing material and possibly one or several types of salt into the furnace, melting said material by heating with the aid of at least one burner supplied with a combustive material and fuel in such a way that a molten aluminum possibly covered with a slag containing, in particular alumina and at least one salt, is produced and in measuring a carbon monoxide and/or hydrogen concentration in the furnace atmosphere or in a smoke at the exit of the furnace. Oxygen content in the combustive material supplying at least one burner is greater than 10% by volume, preferably greater than 21% by volume. The inventive method also involves a final phase of reduction of the molten aluminum oxidation during which the fuel flow rate is substantially constant while the injected combustive flow rate is controlled at a value ranging from 3 to 15% by volume which is greater than a CO concentration in the furnace and/or in the smoke without control.
US7582252 — PLANT WITH ROTATING FURNACE FOR THE MELTING WITHOUT SALT OF ALUMINUM WITH SCREENING AND RECOVERY OF THE SLAGS — Hitech S.R.L. (Italy) — A plant is provided for the melting of primary and secondary aluminum, provided with a rotating furnace, internally equipped with a spiral element (11), that causes the melting of the aluminum not requiring use of a salt bath. The plant includes a pouring channel (13) adjacent an exit hole (4) of the rotating furnace and material from the pouring channel enters the spherical store basin (16) positioned below if, the spherical store being equipped with a rotating joint (17) having a common inclination with the pouring channel (13) so that what is obtained is the direct and continuous flow of the fused metal in the spherical store without interruption of the process of melting. The plant is also equipped with an automatic and continuous system of selection and recovery of the slag of fusion, integrated in the same plant, and a double system of canalization of the gases that allows cleaning of the pollutant agents and energy conservation in the melting furnace.
US7556766 — CONTROLLED FREE VORTEX SCRAP INGESTER AND MOLTEN METAL PUMP — Alcoa Inc. (USA) — A scrap melter for light gage metal scrap includes a shrouded impeller connected to a shaft, the shaft connected to a rotary power device. The shrouded impeller is immersed in a molten metal pool in a charge bay or furnace. It is inclined at an angle relative to the vertical. The shrouded impeller creates a vortex in the molten metal pool, which includes a whirlpool at the surface of the molten metal. The center of the whirlpool is horizontally displaced from the shaft so that scrap can be charged into the whirlpool to be ingested into the vortex. The shrouded impeller creates a vortex for scrap ingestion and pumps molten metal for re-circulation through the melting system without the need of a separate pump.
US7462218 — ALUMINUM MELTING METHOD USING ANALYSIS OF FUMES COMING FROM THE FURNACE — L’Air Liquide, Societe Anonyme a Directoire et Conseil de Surveillance pour l’Etude et l’Exploitation des Procedes Georges Claude (France) — The invention relates to the field of aluminum smelting and to aluminum melting furnaces, especially to aluminum scrap recycling processes. A process and a device are described for melting aluminum where solid aluminum is melted in a furnace to form aluminum melt pool. The temperature and carbon monoxide (CO) concentration of the flue gas generated in the melting process is detected and examined for variations. Using this variation information, it is determined if aluminum oxides have formed on the surface of the aluminum melt pool and if they have, the melting process is regulated accordingly.
N206521513 (U) — ALUMINUM SMELTING SLAG ALUMINUM SEDIMENT SEPARATOR — Taihu Guanghua Aluminum Ind. Co. Ltd. (China) — The utility model discloses an aluminum smelting slag aluminum sediment separator, including a sieve holder, vibration exciter, strutting arrangement, and motor. The slope of the sieve holder is fixed, the sieve encasement is provided with a screen cloth, the screen cloth will sieve the contents of the holder and separate two layers from top to bottom while the vibrator is set up on the sieve holder, and the sieve bottom of the holder is provided with a quick cooling body. The utility model has the advantages of the aluminum liquid quickly separating from the slag during the mechanical oscillation mode to reduce the oxidational losses of aluminum through quick cooling relative to the traditional operation mode, improved aluminum scrap separation efficiency, and an increased rate of recovery.
CN205237694 (U) — ALUMINUM SCRAP RECOVERY DEVICE — Zhenjiang Yujiu Intelligent Equipment Ltd. by Share Ltd. (China) — The utility model relates to an aluminum scrap recovery device, including the stirrer, breaker, hydroextractor, magnet separator, drying machine, and melt tank. The stirrer and breaker are equipped in between with a first board lifting machine that expands, a second one located between the breaker and the hydroextractor and expand the board lifting machine, a third between the hydroextractor and the magnet separator, and the fourth between the magnet separator and the drying machine, at which point the aluminum bits are retrieved and recycled. With this device, energy consumption is low and production efficiency is high.
CN204866486 (U) — ALUMINUM SCRAP RECOVERY PLANT — Chongqing Soonbest Aluminum Alloy Co. Ltd. (China) — The utility model relates to an aluminum scrap recovery plant. This aluminum scrap recovery plant includes a feed inlet, support frame used to support a sieve, vibrating motor, and damping device for conveying away residuals. The feed inlet has a fixed connection in one end at the top of the conveyer; the support frame is located below the conveyor and through the damping device connecting with the conveying path. The vibrating motor has a fixed connection with the conveyor and sieve. This aluminum scrap recovery plant isolates the aluminum scrap at high efficiency through vibrations induced by the vibrating motor.
CN204027316 (U) — ALUMINUM ALLOY SCRAP RECOVERY SMELTING FURNACE AND COMBUSTOR THEREOF — Dongfeng Motor Co. Ltd. (China) — The utility model provides an aluminum alloy scrap recovery smelting furnace and a combustor thereof. The recovery smelting furnace comprises an outer wall and an inner partition wall, the combustor is arranged on the outer wall directly facing the partition wall, a burner is arranged at the front end of the combustor and is inclined downwards, and the flame inclination angle formed between flame sprayed by the burner and the surface of molten aluminum ranges from 8 degrees to 20 degrees. The inclination angle of the burner of the combustor is adjusted, so that the flame inclination angle formed between the flame and the surface of the molten aluminum is kept at 8-20 degrees, outer flame is aligned to the far corner of the surface of the molten aluminum as far as possible instead of directly facing a middle partition wall, and impact of the outer flame on the middle partition wall is decreased while smelting heat efficiency is ensured. In addition, by the aid of patterned tiles, the shape of the flame can be changed into a soft spinning cone from a cone, the heat impact on the middle partition wall is further improved, and the forming rate of pollutants is very low.
CN204022913 (U) — ALUMINUM ALLOY SCRAP REMELTING RECOVERY DEVICE — Dongfeng Motor Co. Ltd. (China) — The utility model provides n aluminum alloy scrap remelting recovery device. The aluminum alloy scrap remelting recovery device comprises three melting aluminum chambers and molten aluminum circulation units. Three sides of a first melting chamber serve as outer walls, one side serves as a first separation wall, the outer wall facing to the first separation wall is provided with a burner for ejecting flame, and the other two outer walls are respectively provided with a first feeding opening and a molten aluminum discharge opening. A second melting chamber and the first melting chamber are respectively arranged on both sides of the first separation wall. Two sides of the second melting chamber serve as outer walls, one side serves as a first separation wall, the other side serves as a second separation wall, the outer wall facing to the first separation wall is provided with a smoke vent, and the other outer wall is provided with a second feeding opening. A third melting chamber is arranged on one side of the second melting chamber on one side of the first separation wall and separated from the second separation wall through the second separation wall, the height of the third melting chamber is smaller than that of the second melting chamber, the top of the third melting chamber is provided with a third feeding opening, and a stirring device is arranged in the third melting chamber. Molten aluminum channels are arranged in the first separation wall and the second separation wall among the three melting chambers. The molten aluminum circulation units are arranged in the melting chambers or below the melting chamber.
CN203960301 (U) — ALUMINUM SCRAP RECOVERY AND SMELTING EQUIPMENT — Guangyuan City Ann Yu Aluminum Alloy Wheel Co. Ltd. (China) — The utility model discloses aluminum scrap recovery and smelting equipment which comprises a recovery furnace, wherein the recovery furnace is internally provided with a scrap suction device with a scrap suction opening, the scrap suction opening is formed in the outer side wall of a recovery furnace, and the scrap suction device is communicated with a smelting furnace by virtue of a filter screen; the smelting furnace is provided with an exhaust pipe, and the exhaust pipe extends out of the recovery furnace; the smelting furnace is also communicated with a delivery pipe, the delivery pipe extends out of the recovery furnace, and one end, which extends out of the recovery furnace, of the delivery pipe is provided with a solution control valve. The aluminum scrap recovery and smelting equipment disclosed by the utility model is capable of sufficiently recovering fine aluminum scraps by utilizing an absorption principle and has a smelting function.
CN203462106 (U) — CLEANING EQUIPMENT IN A SECONDARY ALUMINUM PROCESSING PROCEDURE — Alnan Aluminum Co. Ltd. (China) — The utility model discloses cleaning equipment in a secondary aluminum processing procedure. The cleaning equipment adopts a drum structure and comprises a drum shell, a motor, and a base, wherein the drum shell is installed on the base, and the motor drives the shell to rotate through a transmission mechanism. The cleaning equipment is characterized in that a plurality of bayonet locks are distributed in the drum and a water pipe enters into the drum from one end of the drum; a spray head is installed at the end head of the water pipe, and a cleaning solution is sprayed to aluminum scrap pieces put in the drum from the spray head. The equipment has the advantages of structural simplicity, low maintenance cost, and high production efficiency while it increases the metal recovery rate and waste discharge in the smelting procedure is greatly reduced compared with other processes.
CN203443323 (U) — TILTING REVOLVING ALUMINUM SMELTING FURNACE — Yueyang Mapower Thermprocess & Electromagnetic Technology Co. Ltd. (China) — The utility model relates to a tilting revolving aluminum smelting furnace for re-smelting aluminum scrap. The tilting revolving aluminum smelting furnace comprises a fixed base, a revolving furnace body, a furnace door device, a combustion system, and a control system, wherein a movable base is arranged on the fixed base; one end of the movable base is connected with a rotating shaft, and the other end of the movable base is connected with a tilting system; the movable base is provided with a support assembly and a driving device; the revolving furnace body is supported on the movable base through the support assembly; the driving device is connected to the bottom end of the revolving furnace body, and is used for driving the revolving furnace body to revolve; the tilting system is used for lifting the movable base, and driving the movable base to rotate around the rotating shaft in order to complete dumping motion of the revolving furnace body. In the tilting revolving aluminum smelting furnace, aluminum is smelted in a continuous revolving mode, so that high-temperature molten aluminum is fully mixed with aluminum scrap, the heat transfer efficiency during smelting is increased, and the smelting time is shortened; also, the use of a salt flux is reduced during aluminum smelting, the emission of dust is reduced, the recovery rate of aluminum is increased, the energy consumption is lowered, and the production efficiency is increased.
CN202246795 (U) — ALUMINUM THIN MATERIAL REGENERATIVE RECOVERY SMELTING DEVICE — Yueyang Zhongding Thermotechnical Electromagnetic Technology Co. Ltd. — The utility model relates to an aluminum scrap smelting and processing device, particularly to an aluminum thin material regenerative recovery smelting device, which includes an aluminum smelting furnace, an aluminum scrap feeding device arranged on one side of the aluminum smelting furnace, an aluminum scrap conveying device used for connecting the aluminum scrap feeding device to an upper aluminum scrap feeding opening of the aluminum smelting furnace, nitrogen generating devices connected with and used for transmitting nitrogen to an aluminum conveying pipeline of the aluminum scrap feeding device and nitrogen blowing pipes of the aluminum smelting furnace, and an aluminum liquid temperature measuring device that are arranged on the aluminum smelting furnace and used for detecting the temperature of the aluminum liquid in the furnace. As a certain smelting bath aluminum liquid is obtained after the preparatory working of the aluminum scraps is performed by workers, the aluminum scraps are mechanically fed into a hopper, and other operations as feeding control, combustion control, aluminum liquid temperature control, nitrogen generation control, and nitrogen blowing control can all be performed through an electrical apparatus, the aluminum thin material regenerative recovery smelting device has a high automation degree and production efficiency and is suitable for batch production.