493 results about "Ferroalloy" patented technology

Systems and methods described herein may include pumps and pump components including carbon-manganese-chromium (C—Mn—Cr)-based steel alloys for enhanced resistance to wear or corrosion. A pump component may include one or more components formed of a C—Mn—Cr-based ferrous alloy, which may result in enhanced wear or corrosion resistance. The C—Mn—Cr-based ferrous alloy may include a carbon content ranging from about 0.1 weight percent (wt. %) to about 2 wt. %, a manganese content ranging from about 10 wt. % to about 30 wt. %, and a chromium content ranging from about 0.1 wt. % to about 20 wt. %.

A laminated core comprising a plurality of segments is provided. The segments each comprise a plurality of soft magnetic lamination sheets that are stacked one on top of another in a direction of stacking and attached to one another by means of a first connection type to form a segment. The segments are attached by means of a second connection type to form a laminated core, the first and second connection types being different.

The present invention provides a method for hydrogen-based reduction roasting pretreatment of chromite pellets, belonging to the field of metallurgical technology. The method comprises the following steps: mixing chromite powder, a binder and water to form pellets, obtaining green chromite pellets; mixing H2 and CO to obtain a reducing gas; and carrying out reduction roasting on the green chromite pellets in the reducing gas. The reduction roasting of the present invention is carried out in an H2-CO atmosphere, completely without involving the use of primary energy solid carbon, and enables the chromite pellets to obtain sufficient strength and metal pre-reduction degree before entering the ore thermal furnace, which can greatly reduce the comprehensive energy consumption and emissions in the production of ferrochrome alloy.

The invention discloses a method for melting and smelting ferrochrome in an all-oxygen hydrogen-rich low-carbon furnace, which comprises the following steps: (1) proportioning and uniformly mixing chromite pellets, coke and lime according to the mass ratio of 1: (0.15-0.2): (0.08-0.15), and filling the mixture into the all-oxygen hydrogen-rich low-carbon furnace; (2) high-temperature hydrogen-rich gas at the temperature of 900-1100 DEG C is introduced into the middle of the furnace body, and selective reduction of ferrochrome oxide is achieved; blowing industrial pure oxygen at the lower part of the furnace body, combusting with coke to generate CO, and driving a secondary reduction reaction; (3) maintaining a high-temperature environment in the furnace through oxygen-fuel combustion to completely melt the materials into molten iron, and carrying out central stirring on the molten iron to form a vortex with the height-diameter ratio of 0.5-1.5; and (4) discharging the molten iron after the reaction is completed. According to the method, the reduction rate of chromium in the chromite exceeds 92%, the carbon emission is reduced by 40% or above compared with a traditional blast furnace and submerged arc furnace process, meanwhile, the method has the advantages of being high in smelting efficiency, low in energy consumption, stable in product quality and the like, and a low-carbon and efficient innovative path is provided for ferrochrome smelting.

The invention provides a lithium manganese iron phosphate positive electrode material and a preparation method and application thereof. The method comprises the following steps: mixing manganese metal and iron metal, heating, melting and uniformly mixing in an inert gas atmosphere, and grinding into powder; adding an ammonium salt solution, continuously adding the ground manganese-iron alloy powder under heating to form a suspension, introducing compressed air and stirring, reacting, filtering, washing, drying, crushing and grinding to obtain a manganese-iron oxide precursor, feeding the manganese-iron oxide precursor, a lithium source, a phosphorus source and doped metal elements into pure water, adding a carbon source, mixing to form a suspension, and grinding and drying to obtain the lithium-phosphorus-doped manganese-iron composite material. And carrying out carbon thermal reduction in an inert gas atmosphere, and crushing to obtain the lithium manganese iron phosphate positive electrode material. The ferromanganese oxide precursor prepared by heating the metal manganese and the metal iron to a molten state and mixing the metal manganese and the metal iron realizes uniform dispersion of the manganese and the iron at an atomic level, avoids the problems of nonuniform mixing of the manganese and the iron and dissolution of the manganese, and improves the conductivity and the electrochemical performance of the material.

The invention relates to a method for improving early-stage performance of an all-solid-waste cementing material, and aims to improve the early-stage performance of the cementing material. At present, the early strength (1d strength) of an all-solid waste cementing material is generally low, but the characteristic is closely related to construction efficiency and is a key limit for large-scale application of the all-solid waste cementing material. Sintering is not included in the working procedures, and the product does not contain cement clinker. The method comprises the following steps: selecting industrial solid wastes such as steel slag, blast furnace water slag, iron alloy slag, silicomanganese slag, industrial byproduct gypsum, sintering fly ash, fly ash, calcined coal gangue and the like as raw materials; the industrial solid waste is subjected to independent or mixed grinding treatment; by optimizing the raw material ratio and introducing key component minerals, the specific surface area of the cementing material is increased, and active sites of the key minerals are dissociated and exposed. The mass of the introduced key components for optimizing the raw material ratio accounts for less than or equal to 15% of the total mass of the cementing material, the mass fraction of the key and active minerals is increased by less than or equal to 10%, and the early strength of the all-solid waste cementing material is increased by 30%.

The invention relates to the technical field of ferroboron alloys, in particular to a preparation process of a high-purity ferroboron alloy, which comprises the following steps: S1, preparing raw materials; s2, electric furnace smelting; s3, chemical refining; s4, adjusting components; s5, casting and cooling; and S6, heat treatment. And heat treatment equipment in the step S6 comprises a heating box, a placing mechanism, a path unit, a driving unit and an intermittent unit. The clamped cast ingots intermittently move along a set path through the driving unit, so that the inner cast ingots can move to the outer side to be close to a heat source, each cast ingot can be uniformly heated, then, the cast ingots deflect by a certain angle through the intermittent unit, and after the cast ingots move out of the vertical section of the path, the cast ingots are separated from the heat source. The clamped area of the cast ingot in the initial state is exposed, in conclusion, the area, facing a heat source, of the cast ingot and the distance between the cast ingot and the heat source are intermittently changed, the heating effect in the heat treatment process of the cast ingot is improved, and the problems of excessive heating and insufficient heating are avoided.

The invention relates to the technical field of welding materials, and particularly discloses a high-temperature-resistant flux-cored wire containing rare earth elements and a preparation method of the high-temperature-resistant flux-cored wire. The high-temperature-resistant flux-cored wire containing the rare earth elements comprises a welding wire skin and a flux core. The flux core comprises the following raw materials of dehydrated rutile, dehydrated potassium feldspar, zircon sand, metal chromium powder, metal nickel powder, electrolytic manganese, ferrotitanium, ferro-aluminum, potassium cryolite, potassium titanate, sodium titanate, fine iron powder, yttrium-based iron alloy powder, atomized ferrosilicon, nitrided ferrochrome, bismuth oxide, auxiliaries and the balance reduced iron powder. The auxiliary agent is a mixture of a zirconium-iron alloy, a titanium-iron alloy and an aluminum-magnesium alloy. A specific alloy auxiliary is introduced into the flux core to protect stable transition of rare earth yttrium, yttrium and multiple components synergistically optimize the weld joint performance, 253MA heat-resistant steel is matched, slag and electric arc regulation and control components and a reasonable process are matched, and the welding quality of the welding wire is improved.

The invention provides a high-wear-resistance and low-dilution gas shielded welding wire and a preparation method thereof, and belongs to the technical field of welding wire manufacturing. The welding wire consists of the following raw materials in parts by weight: 45-52 parts of iron; 18-22 parts by weight of an electrolytic nickel plate; 6-8 parts by weight of high-purity molybdenum powder; 4-6 parts by weight of nano tungsten powder; 3-4.5 parts by weight of a vanadium nitride alloy; 1.2 to 1.8 parts by weight of a niobium-iron alloy; 0.8-1.5 parts by weight of aluminum magnesium alloy powder; 0.3 to 0.6 part by weight of lanthanum cerium mixed rare earth; 0.15 to 0.25 part by weight of ferroboron alloy; 0.5 to 0.8 part by weight of metal silicon powder; 0.2 to 0.4 part by weight of a magnesium-calcium alloy; and 0.1-0.3 part by weight of titanium hydride powder. The hard framework is formed through gradient distribution of carbides such as molybdenum, tungsten and vanadium, the wear-resisting life is remarkably prolonged, melting mixing of base metal is reduced through the nickel-based alloy, the consistency of deposited metal components is ensured, free hydrogen is fixed through hydrogen trap phases such as titanium and niobium, and a moisture absorption path is blocked in combination with a surface passivation film.

The invention belongs to the technical field of cold forging steel manufacturing, and particularly discloses a production method of high-aluminum cold forging steel for medium-strength and high-strength standard parts, which comprises the following steps: controlling the slag alkalinity, the contents of C, S and P in molten steel, the tapping temperature, the thickness of a steel ladle slag layer and the tapping time during converter smelting; a deoxidizing agent, lime, low-carbon ferromanganese, silicon-manganese alloy, aluminum-iron alloy and a carburant are added, argon is blown into molten steel when calcium-iron wires are fed in an argon blowing station, components of a refining slag modifier are controlled to be added during LF refining, calcium carbide and the aluminum-iron alloy are added according to the oxygen content and the aluminum content in the molten steel, a tundish for continuous casting is protected by argon, and the molten steel is continuously cast. The thickness of a powder slag layer and the thickness of a liquid slag layer are controlled, a covering agent is added into the tundish, the purity of molten steel is increased by adjusting the whole process section, and therefore follow-up tundish nozzle nodulation is reduced, and the problem that in the prior art, due to the fact that the purity of molten steel is low, a high-aluminum cold heading steel casting continuous casting tundish nozzle is prone to nodulation is solved.

The invention relates to a multi-physics field coupling method for a smelting process of a ferronickel heating furnace, and relates to the multi-physics field coupling method for the ferronickel heating furnace, the method comprises the following steps: establishing a ferronickel heating model, importing the ferronickel heating model into ICEM software for grid division, and finally importing a grid into FLUENT; according to the method, based on a Maxwell's equation and an Ohm's law, an electrothermal conversion algorithm, an electromagnetic induction algorithm and a multiphase heat transfer and mass transfer algorithm are compiled in combination with a user-defined function (UDF), so that a mathematical analysis model for mutual coupling of multiple physical fields, multiphase flows and furnace body thermal stress in smelting of the submerged arc furnace is established. The model is combined with a radiation model, a turbulence model, a multi-phase flow model and a static structure model, a heat and mass transfer mechanism among an electric arc, a molten pool and a furnace body is disclosed, an influence mechanism of a furnace body structure and a multi-physical field on furnace body temperature distribution is explored, and an action mechanism between the furnace body temperature and thermal stress is clarified, so that the deformation position and deformation amount of the furnace body are predicted.

The invention discloses a self-supporting catalytic electrode for hydrogen production from alkaline electrolyzed water and a preparation method of the self-supporting catalytic electrode. The preparation method comprises the steps that an electroplating solution containing nickel salt, ferric salt and ammonium chloride is prepared, then in the electroplating solution, a conductive substrate serves as a cathode, metal nickel serves as an anode, an external power source is used for providing gradually-increased electroplating voltage, and electroplating is carried out in three stages; depositing a nickel-iron alloy conducting layer on the cathode in an electroplating voltage range of 0.5-1.0 V; the electroplating voltage is gradually increased to 1.0-1.4 V, and a transition layer in which the ferro-nickel alloy and LDH coexist continues to be deposited on the cathode; and the electroplating voltage is further increased to 1.4-1.8 V, and the LDH active layer continues to be deposited on the cathode. The conductive supporting layer and the high-activity catalytic layer are continuously deposited on the same substrate through the electroplating technology, integrated combination of conductivity and catalytic performance is achieved, and the defects that in a traditional catalytic electrode, the binding force between an active layer and a supporting body is weak, and stability is poor are overcome.

The utility model relates to the technical field of waste heat boilers, in particular to an ash removal device for a waste heat boiler of an iron alloy submerged arc furnace, which comprises a base, a waste heat recovery box, a water inlet pipe, a water outlet pipe, an air inlet pipe, an air outlet pipe and an ash removal mechanism. The water outlet pipe is fixedly connected with the surface of the waste heat recovery box, the air inlet pipe is fixedly connected with the surface of the waste heat recovery box, the air outlet pipe is fixedly connected with the surface of the waste heat recovery box, the ash removal mechanism is arranged on the surface of the air inlet pipe and comprises a fixing table, the fixing table is fixedly connected with the surface of the air inlet pipe, and the surface of the fixing table is rotationally connected with a first fan. According to the waste heat recovery device, the dust removal mechanism is arranged, blowing force generated when hot flue gas enters the waste heat recovery box is used for driving the cleaning plate and the hemispherical block to clean the surface of the heat exchange pipe, dirt and dust on the surface of the heat exchange pipe are prevented from being accumulated, the heat exchange efficiency is prevented from being affected, and the durability of the device is effectively improved.

Herein discussed is a heat management system comprising a pipe and a static auger inside the pipe, wherein the pipe has an inner diameter of d, wherein the auger has an outer diameter D and a pitch P, wherein the ratio of D / P is no less than 1, and wherein the auger outer diameter D is no less than 90% of the pipe inner diameter d. In an embodiment, the ratio of D / P is in the range of 2-10, or 2-5, or 2-4, or 5-10. In an embodiment, the pipe is made from stainless steel, carbon steel, Monel, Inconel, Incoloy, Hastelloy, ceramics, silicon carbide, alumina, and combinations thereof. In an embodiment, the system comprises a fluid passing through the pipe, wherein the pipe heats or cools the fluid.

The invention provides a method and a system for recovering ferrochrome in ferrochrome slag based on particle size separation, and relates to the technical field of metal mineral treatment. The method comprises the following steps: crushing the ferrochrome slag until the particle size is less than or equal to 15mm; the crushed ferrochrome slag is screened into materials with three particle sizes of-15 + 6 mm,-6 + 1 mm and-1 mm; respectively carrying out magnetic separation on the materials of the first particle size fraction and the second particle size fraction to obtain a first magnetic product, a second magnetic product and a non-magnetic product; the materials of the third particle size fraction are ground to the preset fineness, and ground materials are obtained; the ore grinding materials are subjected to gravity separation, and gravity separation products and tailings are obtained; the first magnetic product, the second magnetic product and the reselection product are recycled ferrochrome. Through the combination of crushing, screening, magnetic separation, grinding and reselection processes, high-efficiency recovery of ferrochrome alloy with different particle sizes in ferrochrome slag is realized, the recovery rate of ferrochrome alloy is improved, and good economic benefits and environmental benefits are achieved.

The invention discloses a method and device for establishing an oxidation corrosion model of ferrochrome in a closed environment based on finite elements, and the method comprises the steps: obtaining a first size of a closed gas environment, and obtaining a second size of a sample of a ferrochrome material; establishing a two-dimensional geometric model according to the first size and the second size; the oxidation corrosion reaction information of the ferrochrome material is preset; presetting a first attribute of the ferrochrome alloy material, a second attribute of a reaction substance and a third attribute of a closed gas environment; performing grid division on the ferrochrome material to obtain a target grid division area; and constructing an oxidation corrosion model according to the two-dimensional geometric model, the oxidation corrosion reaction information, the first attribute, the second attribute, the third attribute and the target grid division region. The method can improve the data accuracy of monitoring and predicting the corrosion degree of the alloy, and can be widely applied to the technical field of computers.

The invention discloses a tungsten-based heavy alloy surface-coated stainless steel component and a preparation method and application thereof, and belongs to the technical field of metal connection. The preparation method of the component with the tungsten-based heavy alloy surface coated with the stainless steel comprises the following steps that a transition layer is additionally attached to the surface of tungsten-nickel-iron alloy; the tungsten-nickel-iron alloy with the transition layer and austenitic stainless steel are assembled, and a sheath assembly is obtained; carrying out degassing and hot isostatic pressing treatment on the sheath assembly; according to the preparation method of the component coated with the stainless steel on the surface of the tungsten-based heavy alloy, the tungsten-based heavy alloy and the austenitic stainless steel are used as matrixes, and preparation of the component coated with the tungsten-based heavy alloy through the austenitic stainless steel is achieved through the method of combining hot isostatic pressure diffusion bonding and powder metallurgy. An existing technology that a stainless steel shell is used for protecting tungsten-based heavy alloy and an end socket is closed in an argon tungsten-arc welding mode is replaced, an original assembly gap is removed through metallurgical bonding, and the whole running-down system is more stable in operation and better in corrosion resistance.

The invention relates to the technical field of self-baking electrodes, in particular to an alternating-current variable-frequency self-baking electrode baking state prediction method for an iron alloy submerged arc furnace, which comprises the following steps: acquiring input parameters of a self-baking electrode, and simplifying an electromagnetic field and a heat transfer process related to the self-baking electrode into a two-dimensional axial symmetry state; constructing an electromagnetic field mathematical model, and obtaining expressions of the magnetic field intensity and the current density of the self-baking electrode; constructing a temperature field mathematical model of the self-baking electrode of the submerged arc furnace and an expression of electrode pressure release time; a finite volume method is utilized to discretize an electromagnetic field mathematical model and a temperature field mathematical model, and on the basis of input parameters and electromagnetic thermal boundary conditions, an implicit solution method which is good in convergence and stability and can achieve a large grid size is adopted to solve the magnetic field intensity, the current density, the temperature distribution and the electrode pressure release time of the self-baking electrode. The method can accurately and quickly predict the electrode pressure release time, and effectively reduces the roasting control cost of the self-roasting electrode of the submerged arc furnace.

The invention discloses a clean preparation method of a rare earth ferrosilicon alloy based on cooperative control of carbon addition and silicon supplement, and belongs to the technical field of thermometallurgy. In order to solve the problems that according to an existing carbon thermal reduction method, the furnace bottom is prone to nodulation, the recovery rate is low, and energy consumption is high, the'carbon addition-silicon supplementation-carbon depletion 'ternary cooperative regulation and control method is provided. Comprising the following steps: taking a rare earth-containing material, a siliceous raw material and a carbonaceous reducing agent as raw materials, burdening, pelletizing, and adding into a submerged arc furnace for reduction smelting; the core technology is that the weight ratio of oxide to reducing agent carbon in the rare earth pellets is controlled to be 1: (1.20-1.30), meanwhile, a silicon element accounting for 2.0-10.0% of the weight of the oxide is added, and parameters meet the coupling relational expression S = k * (1.30-R) * 100% + S0; and the smelting adopts carbon deficit operation, and the carbon addition amount is 0.90-0.95 times of the theoretical amount. The method inhibits the generation of the rare earth carbide nodule at the furnace bottom from the aspects of thermodynamics and dynamics, and realizes continuous and stable production. The rare earth recovery rate reaches 96% or above, the comprehensive power consumption is reduced to 8600-9000 kWh / t, the furnace life is prolonged to 25 months or above, and remarkable economic and environmental benefits are achieved.

The invention provides a method for short-process all-component echelon recovery of a waste hydrogenation catalyst, and relates to the field of solid waste treatment. The recovery method of the waste hydrogenation catalyst comprises the following steps: roasting the waste hydrogenation catalyst and sodium carbonate to obtain a roasted product; the roasted product is leached with water, and leaching liquid and leaching residues are obtained; extracting the leaching solution by using an extracting agent to obtain a vanadium-molybdenum-containing organic phase, sequentially carrying out reverse extraction treatment on the vanadium-molybdenum-containing organic phase by using a strong alkaline reverse extraction agent and a weak alkaline reverse extraction agent to obtain a vanadium reverse extraction solution and a molybdenum reverse extraction solution, and carrying out vanadium precipitation treatment on the vanadium reverse extraction solution to obtain ammonium metavanadate; acidizing the molybdenum strip liquor to precipitate molybdenum to obtain ammonium molybdate; carrying out sintering treatment on the leaching residues and alkaline substances, leaching obtained calcine with water to obtain water leaching residues and filtrate, and carrying out aluminum precipitation treatment on the filtrate to obtain aluminum hydroxide, aluminum oxide or pseudo-boehmite; and reducing and smelting the water leaching residues to obtain the ferro-nickel alloy. According to the invention, multi-element comprehensive recovery of all components of vanadium, molybdenum, nickel, aluminum and sulfur can be realized, and high-value utilization of all components of the waste hydrogenation catalyst is realized.

The invention relates to the technical field of metallurgy, in particular to a reducing agent suitable for a large submerged arc furnace and application thereof. The reducing agent for the large submerged arc furnace comprises the following raw materials: small-particle semi-coke, medium-particle semi-coke, metallurgical coke particles and electrode hard broken ends. The broken end after hard breaking of the electrode is applied to a large submerged arc furnace to serve as a reducing agent to be combined with an existing reducing agent, when the mass ratio of the broken end particles of the hard breaking of the electrode in the reducing agent is 4.5%-6.5%, the problem of hazardous waste treatment of the broken end of the electrode is solved, meanwhile, the reducing agent at the bottom of the furnace is supplemented, the smelting production cost is reduced, and economic benefits and environmental protection benefits of iron alloy production are improved.

The invention relates to the technical field of submerged arc furnace power supply systems, and provides an industrial iron smelting detection method based on a direct-current submerged arc furnace, which comprises the following steps of: constructing an electric thermal field chemical reaction dynamic model, integrating electric field, thermal field, chemical and mechanical full-dimensional data, and analyzing a multi-physical field coupling state in the furnace in real time; real-time working conditions and historical data are matched through a dynamic time warping algorithm, optimal power supply parameters are screened, and causes such as insufficient coke activity are positioned; and a digital twin simulation verification optimization scheme is utilized to realize millisecond-level adaptive control. The equipment reliability is improved through edge calculation and a safety interlocking mechanism, the limitation of artificial experience is broken through, and an efficient and accurate intelligent control solution is provided for power supply of the direct current submerged arc furnace.

The invention relates to the technical field of materials and metallurgy, in particular to a method for obtaining ferro-nickel alloy by smelting laterite type nickel ore, which comprises the following steps: carrying out compression molding on a batch of the laterite type nickel ore to obtain pellets, calcining the pellets in a vertical calcining furnace to obtain metallized pellets, and smelting and separating the metallized pellets to obtain ferro-nickel alloy and slag; nodules can be eliminated in the reduction roasting stage, meanwhile, the use amount of air can be reduced, the exhaust gas emission temperature is lowered, and therefore the heat efficiency is improved. The slag is ground and separated into slag particles and slag powder, the slag particles are rich in metal elements, the slag particles are extracted to serve as return mine and participate in batching again, the metal recovery rate is increased, and the slag powder can be used as superfine slag powder. Besides, if the slag is subjected to remelting and component adjustment, cement or steel slag phosphate fertilizer can be obtained in the ferronickel production process and is used for replacing the superfine slag powder, and resource waste is further avoided.

The invention relates to a method for preparing rare earth steel by refining prefabricated slag of a CaO-Al2O3-REO-MgO slag system, belongs to the technical field of ferrous metallurgy, and solves the technical problem of how to prepare the rare earth steel by refining the prefabricated slag of the CaO-Al2O3-REO-MgO slag system so as to improve the rare earth yield. The invention discloses a method for refining and preparing rare earth steel by using prefabricated slag of a CaO-Al2O3-REO-MgO slag system. The method comprises the following steps: S1, paving a deoxidizing agent, the prefabricated slag and lime at the bottom of a steel ladle before tapping, and tapping; s2, slag adjustment operation of the LF furnace; step S3, alloying is carried out; s4, treating white slag for more than or equal to 20 minutes, and performing calcium treatment; s5, argon blowing is carried out, and an LF furnace station is left; s6, RH treatment is carried out; s7, adding a rare earth iron alloy; s8, vacuum breaking is carried out after vacuum circulation, and the robot leaves the RH station; s9, a tundish covering agent is scattered on the surface of the molten steel; and S10, the surface of the molten steel is protected through continuous casting crystallizer casting powder. The yield of the rare earth elements is 40% or above.

The invention discloses a method for smelting yellow phosphorus and alloy by using high-magnesium low-grade phosphorite, which comprises the following steps of: proportioning the high-magnesium low-grade phosphorite, a calcium flux, a siliceous flux, iron ore and a carbonaceous reducing agent, and carrying out reduction smelting treatment, so that part of apatite is reduced to generate yellow phosphorus steam, and part of phosphorus steam and reduced iron are chemically combined to form the alloy; calcium oxide, magnesium oxide, silicon oxide and aluminum oxide form low-melting-point smelting slag, and activated slag is obtained through water quenching. The method can provide technical reference for efficient resource utilization of low-grade phosphorite, especially high-magnesium and high-iron type low-grade phosphorite, three products of high-quality yellow phosphorus, high-added-value ferrophosphorus and activated smelting slag are obtained at the same time, and no new solid waste is generated in the process.

The invention relates to a novel temperature-bearing wear-resistant copper alloy and application thereof, belongs to the technical field of non-ferrous metal materials and preparation thereof, solves the technical problem of insufficient wear resistance and working stability of a copper wire mother in a high-temperature environment, and adopts the technical scheme that the novel temperature-bearing wear-resistant copper alloy comprises the following components in percentage by mass: 35-42% of zinc, 2-4% of aluminum, 4-7% of manganese, 0.4-0.7% of nickel and the balance of copper. 4%-7% of silicon-chromium-iron alloy and the balance of copper; the novel temperature-bearing and wear-resisting copper alloy is used for preparing a copper alloy part, namely a copper wire bus bar, which works by virtue of friction force in a high-temperature environment. The invention further discloses preparation process steps of the copper wire bus bar. By optimizing the composition, the proportion and the preparation technological process of the copper alloy, the wear resistance and the strength of the copper alloy are improved, and the copper alloy is suitable for preparing high-strength wear-resistant copper wire nuts and other parts and has wide application prospects and remarkable economic value.

The invention discloses a method for smelting heat-resistant steel 0Cr25Ni20 through low-cost iron and P removal, and the method comprises the steps of material preparation, P and Fe removal treatment, material distribution, AOD (argon oxygen decarburization) refining, LF (ladle furnace) refining and continuous casting, and the chemical components of the heat-resistant steel 0Cr25Ni20 are controlled in percentage by mass: less than or equal to 0.080% of C; si < = 1.00%; mn < = 2.00%; p is less than or equal to 0.04%; s is less than or equal to 0.02%; ni: 19%-22%; according to the invention, a material separation form is adopted, heat-resistant steel for continuous casting of two furnaces can be produced at the same time, the process flow is convenient, the AOD smelting time is shorter, and the quantity production is guaranteed. The low control of p is realized, high manganese is used for replacing a manganese-iron alloy material, the production cost is reduced, the low-p molten nickel iron is smelted by removing iron and p from high-p pig iron, and the use of pure nickel is reduced. And common high-carbon ferrochrome is adopted, so that the use of imported ferrochrome is reduced. Meanwhile, the chromium melting water in the intermediate frequency furnace reduces oxidation of chromium and improves the recovery rate of chromium. Iron and p are removed at low cost, and iron-removed slag is recycled, so that the production cost is reduced while the production efficiency is improved.

The invention discloses a preparation method of a calcined copper-iron alloy type catalyst for hydrogen production by electrolysis of water, which has the advantages that a synergistic effect is generated through interaction of various metal elements, the hydrogen evolution activity, stability and tolerance of the catalyst in high-corrosivity high-concentration alkaline electrolyte are improved, the dependence on single noble metal is reduced, and the hydrogen production efficiency is improved. The cost is further reduced, and the utilization efficiency of resources is improved.

The invention relates to the technical field of flux-cored wires, and discloses a high-nitrogen high-elongation stainless steel flux-cored wire and a preparation method thereof. According to the welding wire, a 316L stainless steel strip is adopted as an outer skin, the optimal components of the 316L stainless steel strip comprise 0.1%-0.2% of nitrogen and 7%-8% of nickel, and the 316L stainless steel strip is matched with flux core powder of a specific formula. The flux core comprises 30%-40% of chromium powder, 4%-12% of molybdenum powder, 2%-6% of metal nitride, ferrozirconium and the like, and the nitrogen content of a welding seam ranges from 0.20% to 0.30% through the synergistic nitrogen supply mechanism of the steel strip and the flux core. The zirconium element is introduced to form a stable ZrN compound with nitrogen, the copper element is added to improve the nitrogen solid solubility, and grains are refined in combination with the ferrotitanium alloy. And argon-rich gas is adopted for shielded welding, so that nitrogen escape and oxide inclusion are effectively inhibited. The nickel content of the obtained weld joint is 7.5-10%, the ductility is larger than or equal to 30%, and the high strength and plasticity are achieved through nitrogen strengthening and microstructure regulation and control while the nickel consumption is reduced.

The invention discloses a method for enriching valuable elements by collaborative smelting of magnesium slag and desulfurized gold concentrate, which comprises the following steps: uniformly mixing desulfurized gold concentrate, magnesium slag and solvent powder, granulating and drying to obtain mixed granules; the mixed granules are added into a reduction furnace, a reducing agent is added for reduction smelting, and slag and precious iron alloy are obtained; the method comprises the following steps: crushing the precious iron alloy, and leaching to obtain leaching residues and a leaching solution 1; acid is added into the leaching residues for gold dissolving, leaching liquid 2 is obtained, then sodium sulfite is added into the leaching liquid 2, and gold powder is obtained; adding hydrochloric acid into the leachate 1 to obtain a silver chloride solid and a leachate 3; and heating and pressurizing the leachate 3, and adjusting the pH value to obtain the hematite-form precipitate. According to the method, calcium oxide, silicon oxide and magnesium oxide in the magnesium slag serve as slag formers for reduction smelting of the desulfurized gold concentrate in the high-temperature process, iron alloy is obtained through synergistic reduction smelting, meanwhile, valuable elements such as gold, silver and copper in raw materials are captured, the gold recovery rate is increased to 98% or above under the cyanidation-free condition, the silver recovery rate is increased to 95%, and the iron recovery rate reaches 92%.