66 results about "Aluminium smelting" patented technology

The invention discloses a method for harmless disposal and recycling of aluminum ash. The method comprises steps of raw material water immersion nitrogen and chlorine removal, calcination fluorine removal, alkali fusion sintering, sintering material dissolving-out and purifying impurity removal. Aluminum ash generated in metal aluminum smelting process is employed as a raw material, after metal aluminum is recycled through secondary processing, nitrides are removed through water immersion, fluorides are removed through calcinations, alkali fusion sintering is carried out, the sintering materials are dissolved out, impurities are removed through a sodium aluminate solution, the processed aluminum ash is employed as a raw material for producing sand-shaped aluminum oxide. Ammonia gas generated in the aluminum ash harmless disposal process can be employed as an ammonium production raw material, a chlorination liquid generated can be employed as a chlorate production raw material, and silicon fluoride gas generated in the calcination process is absorbed by an aqueous solution. The method is simple and practical, environmental protection benefits are high, the production efficiency is high, the device investment is low, and energy consumption is low. Harmless and recycling disposal of hazardous wastes can be achieved. The obtained product can be applied in practical production.

A process for refining Al from alumina ore by vacuum carbothermic reduction method includes such steps as loading alumina ore, reducing agent and chlorinating agent in internally heated vacuum furnace, reaction at 1270-1570 deg.C under 5-400 Pa for 100-120 min to obtain AlCl, and lowering the temp to lower than 900 deg.C to obtain metallic Al with high purity (more than 95%) and AlCl3 with more than 78% in recovery rate.

The invention relates to a preparation method and a using method for a slurry type iron-based red mud arsenic removing agent. The slurry type iron-based red mud arsenic removing agent is prepared by grinding sintering process or Bayer process red mud and manually or mechanically mixing the ground sintering process or Bayer process red mud with ferrous solution at a certain concentration. When used, the slurry type iron-based red mud arsenic removing agent is sprayed by a slurry pump or manually and mixed with water by a water flow or a mechanical force, so that arsenic contaminant in water can be eliminated after standing and precipitating. The chemical contains about 5 to 10 percent of ferrous, about 40 to 50 percent of red mud and about 50 to 55 percent of water. By combining the chemical with the action of arsenic absorption and iron and arsenic coprecipitation, the precipitation performance is high, the form of absorbing arsenic is stable, and secondary contamination is prevented. In the invention, industrial waste from aluminum smelting industry and cheap ferrite are adopted, so the water treatment cost is reduced greatly; and economic and social benefit is created particularly when the agent is used for treating industrial and mining high-arsenic waste water and other industrial and mining high-arsenic waste water and remediating large-area water arsenic contamination.

The invention discloses an electrochemical corrosion-resistant reinforced Al-Zr-Er alloy material and a preparation method thereof, and belongs to the technical field of metal alloy. According to the invention, an aluminum matrix comprises the following constituents by weight percent: 0.21-0.29 percent of zirconium and 0.06-0.26 percent of erbium. The preparation method comprises the following steps: adding the AlEr-AlZr intermediate alloy during the aluminium smelting process at the temperature of 750-780 DEG C; casting with an iron die, and allowing ingoting to be subjected to homogenizing processing, rolling and solution treatment; and finally, allowing the quenched alloy to be subjected to isochronal aging heat treatment at the temperature between 200-500 DEG C at intervals of 25 DEG C and to be subjected to isothermal aging heat treatment at the temperature of 375+/-10 DEG C. According to the invention, the alloy is greatly improved in strength due to aging heat treatment, and is improved in electrochemical corrosion resistance at the same time, and is different from the phenomenon that a current aluminum alloy is worse in corrosion resistance after being reinforced through heat treatment.

The invention discloses a method for preparing calcium aluminate by synergistic treatment of high-magnesium aluminum ash and fly ash, which comprises the following steps: carrying out wet ball milling on high-magnesium aluminum ash, fly ash and quick lime, and sequentially carrying out washing, solid-liquid separation and roasting treatment on the ball-milled material to obtain a calcium aluminate product. According to the method, a calcium aluminate series product capable of being used for iron and steel smelting desulfurization is obtained by taking the aluminum ash generated in the aluminum smelting processing process as a raw material, so that the comprehensive utilization of hazardous wastes is realized, a relatively high economic value can be obtained, and the method is simple to operate and environment-friendly, and meets the industrial production requirements.

Compositions for making wettable cathodes to be used in aluminum electrolysis cells are disclosed. The compositions generally include titanium diboride (TiB₂) and metal additives. The amount of selected metal additives may result in production of electrodes having a tailored density and/or porosity. The electrodes may be durable and used in aluminum electrolysis cells.

The invention discloses an aluminum-based sandwich panel for the construction industry and a preparation method of the aluminum-based sandwich panel. The aluminum-based sandwich board has the structure formed by combing an aluminum panel, a core material and an aluminum panel in sequence, wherein the core material and the panels are in metallurgical bonding; the core material is a composite material consisting of ceramic particles and aluminum; the ceramic particles are any one of or the combination of multiple of alumina balls, alumina hollow balls, pulverized fuel ash particles and floating balls. The preparation method of the aluminum-based sandwich panel comprises the following steps of: filling a mold; preheating the mold in a casting chamber; smelting aluminum in a smelting crucible, generating negative pressure of the casting chamber to enable an aluminium smelting body to enter the mold from bottom to top; condensing the smelting body in the mold in the smelting crucible after pressurization; and carrying out surface treatment on a casting. The aluminum-based sandwich panel prepared by the invention has the functions of temperature preservation, heat insulation, noise reduction and decoration, thus the aluminum-based sandwich panel can be widely applied in the construction field.

The invention discloses an intelligent conveying system for die-casting molten aluminium. The intelligent conveying system for the die-casting molten aluminium is suitable for the technical field of die-casting molten aluminium conveying, and aims at solving the problem that air oxidation for the molten aluminium is promoted due to violent shake in existing molten aluminium transport, thus the quality of the molten aluminium is declined. The invention provides an intelligent conveying system for die-casting molten aluminium. The system comprises a molten aluminium smelting furnace, a running crucible, a running crucible clamp, an AGV transport trolley, a transport control cabinet, a transport rail, an operation area, a lifting mechanism and a molten aluminium storage crucible. The intelligent conveying system for the die-casting molten aluminium, which is disclosed by the invention, is capable of realizing unmanned and intelligent molten aluminium conveying, and ensures the quality of the molten aluminium and effectively ensures the production quality of die-casting through an online detection technology.

The invention relates to a method for preparing an aluminum fluoride product through combined treatment of multiple wastes and the aluminum fluoride product. The method comprises mixing and leaching fluorine-containing waste particles, aluminum ash powder and to-be-treated aluminum anodic oxidation wastewater, and then performing solid-liquid separation to obtain leachate and filter residues; adjusting the pH value of the leachate to 3-5, carrying out solid-liquid separation to obtain a solid phase, drying the solid phase to obtain aluminum hydroxyfluoride powder, uniformly mixing the aluminum hydroxyfluoride powder with a reactant, and carrying out heat treatment to obtain a heat treatment product; when the reactant comprises at least one of potassium hydrogen fluoride, sodium hydrogen fluoride and lithium hydrogen fluoride, washing and drying the heat treatment product to obtain an aluminum fluoride product; when the reactant is composed of at least one of ammonium fluoride and ammonium bifluoride, determining that the heat treatment product is the aluminum fluoride product. According to the method, fluorine-containing waste, aluminum ash and aluminum anodic oxidation waste water in the aluminum smelting and processing industry are integrated, valuable aluminum and fluorine elements are efficiently recycled in the form of aluminum hydroxyfluoride, the process is simple, and the feasibility is high.

The invention discloses a method for synchronously activating, inerting, removing impurities and melting calcium aluminate by using low-magnesium aluminum ash, wherein the method comprises the steps: carrying out wet ball milling on a mixed raw material of the low-magnesium aluminum ash and a calcium-containing additive, and sequentially carrying out solid-liquid separation, drying and roasting treatment on the ball-milled material to obtain a calcium aluminate series product. According to the method, the calcium aluminate series product capable of being used for iron and steel smelting desulfurization is prepared from the low-magnesium aluminum ash generated in the aluminum smelting machining process, comprehensive utilization of hazardous waste is achieved, high economic value can be obtained, and the method is easy to operate, low in cost, environmentally friendly and capable of meeting the industrial production requirement.

The invention belongs to the technical field of aluminum smelting solid waste recycling and reusing, and particularly relates to a method for recycling fluoride salt from complex aluminum electrolyte. According to the method for recovering the fluoride salt from the complex aluminum electrolyte, the complex aluminum electrolyte and the aluminum sulfate are used as raw materials, the processes of roasting, acid pickling dissolution, alkaline leaching, lithium removal, potassium removal, sodium removal and the like are sequentially carried out, a pure fluoride product (aluminum fluoride/sodium fluoride) is prepared, the whole process flow is simple and green, and the yield is high. According to the method, the fluorine element, the lithium element and the like in the complex aluminum electrolyte are recycled at the same time, HF is not generated, the resource utilization efficiency and economic benefits are improved, and stable production of electrolytic aluminum enterprises is promoted.

The invention discloses a method for linkage recovery of various kinds of solid waste materials in an aluminum smelting process. Specifically, component characteristics of aluminum ash, cathode ash and carbon residues are fully utilized, linkage recovery of various kinds of solid waste materials in the aluminum smelting process is comprehensively considered, the recovery rate of valuable elements of fluorine and aluminum is high (90 percent or higher), the product purity is high (the purity of a mixture of main products AlF3 and Al2O3 is 98 percent or higher), the method can be used for an aluminum electrolysis process, the whole technical profit additional value is high, reagent consumption and energy consumption are small, the ecological environment protection is facilitated, the material consumption and cost are effectively reduced, and economic benefits and environmental benefits of the solid waste material recovery are improved.

A raw gas collection system (15) for collecting raw gas from a plurality of aluminium smelting pots (4) is equipped with a plurality of branch ducts (16, 16a-d). Each branch duct (16, 16a-d) is arranged to channel a respective branch flow (32, 32a-b) of raw gas from an aluminium smelting pot (4) to a collecting duct (20a), which is common to and shared by branch ducts (16, 16a-d). Several of the branch ducts (16, 16a-d) are equipped with a combined heat transfer and flow resistance generating element (17) to remove heat from the respective branch flow (32, 32a-b) of raw gas and to balance the flow of raw gas in the raw gas collecting system (15). The combined heat transfer and flow resistance generating elements (17) reduce the need for adjusting the respective branch duct (16, 16a-d) flow volumes using dampers, thereby reducing the power required to transport the raw gas through the system.

The invention relates to a production technology and production equipment for a motor rotor of a UAV camera. The motor rotor meeting the using requirement is obtained through stamping of a punch, melting of pure aluminium by a dump-type aluminium smelting furnace, aluminium casting by an aluminium casting hydraulic machine, shaft pressing by an oil press, turning by a lathe and milling by a milling machine. Compared with the prior art, the production technology is perfected and clear in flow path, can lower the labor intensity of a worker, and is safe, high in obtained product quality and production efficiency.

A raw gas collection system for collecting raw gas from a plurality of aluminium smelting pots is equipped with a plurality of branch ducts (28d), each of which is arranged to channel a respective branch flow (38d) of raw gas from an aluminium smelting pot to a collection duct (26A), which is common to and shared by the branch ducts (28d). Each of said branch ducts (28d) is, near an outlet (52d) thereof, equipped with a curved section (50d) for aligning the branch flow (38d) with a flow direction of raw gas (27A) already present in the common collection duct (26A), and a constriction (54d) for accelerating the branch flow (38d) through the branch duct outlet (52d) into the common collection duct (26A). Furthermore, each of said branch ducts (28d) is equipped with a heat exchanger (40d) for removing heat from the respective branch flow (38d) of raw gas.; The combined flow resistance of the constriction (54d) and the heat exchanger (40d) reduces the need for adjusting the respective branch flows (28d) using dampers, thereby reducing the power required to transport the raw gas.

The invention relates to the technical field of aluminum smelting, in particular to a stripping failure detection, alarming and secondary knocking unit for a 20kg aluminum ingot continuous caster. The stripping failure detection, alarming and secondary knocking unit comprises a secondary knocking device, a stripping failure detector and an electrical control device. The stripping failure detection, alarming and secondary knocking unit has the advantages that the unit is capable of accurately knocking an aluminum ingot failed to be stripped, the unit is ingeniously designed, compactly structured and highly automated in the limited space of the 20kg aluminum ingot continuous caster, the unit allows accurate stripping by knocking, the major safety hazard that stripping failure of the aluminum ingot causes explosion of molten aluminum is eliminated, and the unit is applicable to a production line of 20kg aluminum ingot continuous casters in the industry of aluminum electrolysis.

The invention belongs to the technical field of aluminum smelting, and particularly relates to a suspension type fire-resistant heat preservation assembly for a large-capacity oxygen-aluminum co-production electrolytic cell. The assembly comprises a metal rod, a hose, a heat preservation layer and a fire-resistant layer, wherein the metal rod and the aluminum electrolytic cell are isolated throughthe fire-resistant layer; the metal rod is wrapped with the hose, and the space between the metal rod and the hose is filled with an anti-expansion and anti-oxidation buffer powder mixture; the hoseis wrapped with the heat preservation layer, the fire-resistant layer is arranged at the lower part of the heat preservation layer, and the heat preservation layer and the fire-resistant layer are sealed; and the metal rod, the heat preservation layer and the fire-resistant layer are fixedly connected. The invention provides the fire-resistant heat preservation assembly which can be freely combined, is easy to lift and convenient to move for the large-capacity non-carbon anode vertical electrolytic cell, and the problem that the fire-resistant heat preservation material is broken due to thermal expansion or oxidation of the metal when the fire-resistant heat preservation material is connected with the metal is well solved.

The invention relates to a blanking device and a method, particularly relates to an aluminium oxide bin bottom blanking device and a method, and is mainly applied to the aluminium oxide storage and transportation field in aluminium smelting. The blanking device comprises a storage bin and a blanking port, wherein the blanking port is connected with a blanking chute, a valve arranged between the storage bin and the blanking port and a valve arranged between the blanking port and the blanking chute are saved, the blanking chute is connected with a main chute, and a branch air pipe supplies air for the blanking chute, the branch air pipe is connected with an air pipe, the air pipe is connected with a fan, the air pipe is provided with an electric valve, and the electric valve is controlled by a computer of a control chamber. The blanking device and the method provided by the invention have the beneficial effects that hardening of aluminium oxide in the storage bin is reduced, and thus blocking of the blanking port is avoided.

A composite transition joint is described. The transition joint includes a plurality of metal layers that are metallurgically bonded together. The metal layers include a base layer, an interlayer bonded to the base layer, and a top layer bonded to the interlayer. The top layer includes an aluminum manganese alloy and includes a thickness of at least 15 mm. The composite transition joint may bond a current stem to an anode of an aluminum smelter. The transition joint increases the length of the current stem, without impacting electrical conductivity of the current stem.

The invention relates to a crushing equipment, in particular to a waste residue crushing equipment for aluminum smelting. The technical problem of the invention is how to design a waste residue crushing equipment for aluminum smelting, which is easy to operate manually, convenient to crush aluminum waste residue, high in feeding speed and efficiency, good in crushing effect and convenient to crushand collect aluminum waste residue. The waste residue crushing equipment for aluminum smelting comprises a base, mounting plates, a conveying belt, a frame body, and a motor; the mounting plates aremounted on the front side and the rear side of the base, the conveying belt is mounted between the mounting plates on the front side and the rear side, the frame body is connected onto the mounting plates, the frame body is positioned above the conveying belt, a blanking opening for blanking is formed in the lower portion of the left side of the frame body, the motor is mounted on the right side of the top of the frame body, a transmission rod is slidably arranged on the left side in the frame body, and a conical plate is connected to the bottom of the transmission rod. According to the invention, the left-and-right movement of a material loading plate of a material blocking mechanism and the up-and-down movement of the conical plate are carried out and matched, and the crushing effect ofthe aluminum waste residue in the crushing process is better through the matching of the material loading plate and the conical plate.