117 results about "Aluminium industry" patented technology

The invention discloses a method for manufacturing a refractory material by innocent treatment of secondary aluminum ash, and belongs to the field of aluminum industry. The method comprises the following steps: further grinding the secondary aluminum ash until 80% of the secondary aluminum ash passes through a screen with the pore diameter of 74 microns; and calcining the secondary aluminum ash for 0.5-4 hours at the temperature of 1150-1550 DEG C in an oxidizing atmosphere with the oxygen content of 12%-18% to convert metal aluminum, aluminum nitride and aluminum carbide in the secondary aluminum ash into aluminum oxide and volatilize the fluoride salt and chloride salt in the secondary aluminum ash, thereby producing a calcined oxide; cooling the waste flue gas containing fluoride salt and chlorate produced in the calcining process for recovery, and denitrifying and discharging the flue gas. The calcined oxide is independently prepared or mixed with an additive, and the aluminum-magnesium refractory material is prepared after electric arc melting. The preparation method can be used for preparing the refractory material with high purity.

The invention relates to foam glass manufacturing method, in particular to a method for preparing high-strength foam glass by utilizing red mud and waste glass. The invention aims at providing a preparation method for high-strength red mud foam glass which utilizes solid wastes and reduces the foam glass production cost. According to the technical scheme, the method for preparing high-strength foam glass by utilizing red mud and waste glass comprises the steps: firstly mixing red mud, waste glass and foam agent, carrying out ball milling to obtain powder batch mixture, and then conducting foaming and annealing treatment to obtain high-strength red mud foam glass product, wherein the red mud is polluting waste slag exhausted when the aluminum oxide is extracted in aluminum industry. The method has the beneficial effects of massively applying solid wastes red mud and waste glass, being environment-friendly and energy-saving, and changing wastes into valuables, thereby having good social benefits and economic benefits.

The invention relates to foam glass ceramic manufacturing method, in particular to a method for preparing foam glass ceramics by utilizing red mud and waste glass. The invention aims at providing a preparation method for preparing environment-friendly and energy-saving foam glass ceramics. According to the technical scheme, the method for preparing foam glass ceramics by utilizing red mud and waste glass comprises the steps: firstly mixing red mud and waste glass, carrying out ball milling to obtain powder batch mixture, and then conducting foaming and annealing treatment to obtain foam glass ceramics, wherein the red mud is polluting waste slag exhausted when the aluminum oxide is extracted in aluminum industry. The method has the beneficial effects of being simple in preparation technique and low in sintering temperature, lowering the production cost of foam glass ceramics, and obtaining higher economic benefits while solving the environment-friendly problem.

The invention relates to a repairing device for an anode steel claw which is a consumptive part in the field of electrolytic aluminium, belonging to the electrolytic aluminium industry. The invention has the technical scheme that in a device for repairing an electrolytic aluminium anode steel claw by total cross-section fusion welding, a slag pool is formed by metal pallets and a cavity formed by moulds and a residual steel claw leg; the metal pallets are respectively arranged at the two opposite sides of the residual steel claw leg; the moulds are respectively positioned on the metal pallets and are closely jointed with the residual steel claw leg; the upper part and the lower part of each mould are respectively connected with a water outlet pipe and a water inlet pipe, and the interiors of the moulds are cavities; fluxing agent is arranged in the slag pool; an electrode is inserted into the slag pool, and a certain distance is maintained between the electrode and the residual steel claw leg; and the electrode and the residual steel claw leg are connected with a transformer by leads. The steel claw leg repaired by the device is high in strength and utilization rate; and meanwhile, the energy is saved, the consumption is reduced, and the problems caused by artificial repairing can be solved.

The invention relates to a fused salt electrolytic aluminum inert anode and a preparation method and application thereof, and belongs to the technical field of ceramic-metal composite materials. The inert anode is composed of an oxide ceramic primary phase and a metal secondary phase. The oxide ceramic primary phase is composed of a nano and quasi-nanoparticle level NiFe2O4 spinel principal component and a ZrO2, V2O5, CeO2 ad MgO modified adding component. The metal secondary phase is formed by selecting five to six of micron order Ni, Cu, Co, Zn, Cr, Ag, Ti, Al, Sc, Zr, No, V, Mn, Y and La. The inert anode is compounded through spinel, nano and quasi nano oxide is obtained by milling through a high energy ball, and the inert anode can be prepared through the steps of common ball milling, compression molding and metal or protective atmosphere sintering, machining and the like of oxide and metal powder. The fused salt electrolytic aluminum inert anode has the advantages of being good in electrical conductivity, high in high-temperature salt corrosion resistance and antioxidation, good in thermal shock resistance and capable of not polluting aluminum electrolysis products. The fused salt electrolytic aluminum inert anode is used in fused salt electrolytic aluminum and is used as a substitution of a carbon anode, and the problems of high consumption and high pollution in the aluminum industry at present can be solved.

The invention provides a metal ceramic material resistant to molten aluminum corrosion, and a preparation method and an application thereof, and relates to the technical field of metal material corrosion and protection. The chemical composition of the metal ceramic material provided by the invention is Ti(C0.3,N0.7)-Al0.25FeNiCoCr, raw materials for preparing the metal ceramic material comprise Ti(C0.3,N0.7) and an Al0.25FeNiCoCr high-entropy alloy; the mass percentage of the Al0.25FeNiCoCr high-entropy alloy in the metal ceramic material is 8-30%; the microscopic Vickers hardness of the metalceramic material ranges from 779.4 HV[0.2] to 1237.1 HV[0.2]. The metal ceramic material provided by the invention has excellent molten aluminum corrosion resistance and good hardness and toughness,and can be applied to the aluminum industry. The preparation method of the metal ceramic material is simple in process and beneficial to large-scale production.

The invention belongs to the field of carbon anode new materials for the electrolytic aluminium industry, and particularly relates to a preparation method of a graphene composite protective layer fora pre-baked carbon anode. The preparation method includes the steps of (1), adding graphene oxide in distilled water, stirring uniformly ultrasonically, adding phenolic resin with heating and stirring, performing redox reaction to obtain aqueous dispersion solution of graphene phenolic resin; (2) weighing a certain quantity of aqueous dispersion solution of graphene phenolic resin, sequentially adding graphite powder emulsion and nanometer aluminium oxide into the aqueous dispersion solution of graphene phenolic resin, and performing ultrasonic dispersion to obtain a graphene composite coating; (3), taking the graphene composite coating obtained the step (2), adding distilled water to dilute the graphene composite coating, covering the surface of the pre-baked carbon anode with the dilutedgraphene composite coating, and then drying naturally to obtain the graphene composite protective layer. The protective layer can effectively isolate oxidation action of air and carbon dioxide to carbon blocks; the carbon yield ratio in the air reactivity test is greater than 95%, and particularly the carbon yield ratio is greater than 96% after the CO2 reactivity test.

The invention provides a method for controlling phosphorus and heavy metal release in pig manure. In the method, a novel modified red mud fixative is prepared by roasting basic material waste slag red mud generated in the production process of the aluminum industry; and the red mud fixative is blended with a proper amount of the pig manure so as to effectively control the dissolution release of phosphorus and heavy metals in the pig manure and reduce the serious environmental pollution caused by the dissolution of the phosphorus and the heavy metal in the pig manure through the fixation of the fixative to the phosphorus and the heavy metals in the pig manure. The method realizes the recycling of waste resources, and has wide application prospect for area source pollution control.

The invention discloses a bipolar radio-frequency admittance material level switch, comprising a main measuring staff 1, an electronic unit 2 and an auxiliary measuring staff 3 arranged on the main measuring staff 1, wherein, the auxiliary measuring staff 1 and the main measuring staff 3 are connected with the electronic unit 2. The bipolar radio-frequency admittance material level switch has the characteristics of HF corrosion resistance, high temperature resistance, scouring resistance, electromagnetic interference resistance, static electricity prevention, hanging prevention, anti-strong vibration effect, etc. The invention has stable and reliable operation, low failure rate and long service life, thereby greatly reducing expenses for repairing and maintaining spare parts and reducing cost for manufacturing electrolytic aluminium. The invention saves expenses of spare parts over 500,000 Yuan annually according to a calculation that consumption of material level switches are reduced by 100 per year, thereby providing a considerable economic benefit. The product not only can be applied to material measurement in the aluminium industry, but also can be popularized and applied in the petrochemical industry, the metallurgy industry, the electrical power industry, the energy industry, the cement industry and other industries.

A high-electric-conductive anode assembly effectively solving inward-bending deformation belongs to the technical field of anode electric-conductive devices in electrolytic aluminium industry. The invention particularly relates to a high-effective anode assembly effectively solving the inward-bending deformation, which not only solves a problem of inward bending of a steel claw, but also reduces welding quantity, is excellent in replaceability and is significantly higher than a cast steel claw in electric conductivity. The anode assembly includes a supporting cross beam which is characterized by including a first U-shaped steel board. An aluminum boss is disposed internally in the middle of the first U-shaped steel board through a bolt assembly. The upper end of the aluminum boss is stretched out from the upper part of the supporting cross beam. Two movable cross beams are respectively disposed in both the two ends of the first U-shaped steel board. Each movable cross beam includes a second U-shaped steel board which is connected to each end of the first U-shaped steel board in a sleeving manner. The second U-shaped steel boards are connected to the first U-shaped steel board through the bolt assembly in a long bar hole in the first U-shaped steel board. Two steel claw heads are respectively disposed on two ends of the bottom of the first U-shaped steel board.