163 results about "Ferrotitanium" patented technology

The invention relates to the technical field of welding wire preparation, in particular to a nickel-based alloy flux-cored wire for 9Ni steel welding and a preparation method of the nickel-based alloy flux-cored wire. A nickel-based alloy flux-cored wire for 9Ni steel welding comprises a flux core, and the flux core comprises, by weight, 26%-34% of titanium dioxide, 3%-5% of ferrozirconium, 8%-12% of ferrotitanium, 1%-3% of rare earth ferrosilicon, 15%-20% of tungsten powder, 1%-2% of polytetrafluoroethylene and the balance pretreated mixed powder. The nickel-based alloy flux-cored wire for 9Ni steel welding has the advantages that low-melting-point eutectic is not prone to being formed, the hot crack sensitivity is reduced, the nickel-based alloy flux-cored wire is suitable for welding of restrained large structures, the deoxidation and denitrification capacity is enhanced, and the pore sensitivity is reduced.

A seamless flux-cored wire for 10CrNiCu steel for ships, applied to welding of continuous casting 907A steel for a main hull and composed of a low-carbon steel sheath and a flux core. The diameter of the wire is 1.0-1.4 mm; the filling rate of flux-cored powder is 14%-16%; measured as the mass percentage of the flux-cored wire, the flux core contains rutile, aluminum oxide, ferroboron, zircon sand, quartz, bismuth oxide, potassium titanate, sodium fluoride, electrolytic manganese, ferrotitanium, magnesium powder, manganese-silicon alloy, nickel powder, metal chromium, copper powder, and iron powder. The seamless flux-cored wire for 10CrNiCu steel for ships has the advantages of good welding performance, stable mechanical properties, good crack resistance, low diffusion hydrogen content, high moisture absorption resistance, excellent rust resistance, and the like. Also provided is a method for manufacturing the seamless flux-cored wire for 10CrNiCu steel for ships

The invention discloses a preparation method of a low-cost high-performance large-diameter forged grinding ball, and belongs to the technical field of grinding balls. The method comprises the following steps: taking Q235 scrap steel and waste high manganese steel ZG120Mn13 as main raw materials, adding a small amount of ferroboron, aluminum-magnesium alloy, ferrotitanium and a carburant, smelting molten steel by adopting an electric furnace, continuously casting to form a steel billet, rolling and forging the steel billet, and optimizing a heat treatment process to obtain the low-cost high-performance large-diameter forged grinding ball. The wear-resistant grinding ball has the characteristics of high strength, high hardness, high wear resistance and impact resistance, the surface hardness of the wear-resistant grinding ball can reach 61-63 HRC, the hardness distribution is uniform, the internal and external hardness difference is small, and the defects of quenching soft spots and the like are avoided. The wear-resistant grinding ball is high in tensile strength and free of out-of-round in use, is used for grinding iron ore, reduces the ball consumption per ton of ore by more than 25% compared with a common forged wear-resistant steel ball under the same working condition, has excellent wear resistance, and has good economic and social benefits in popularization and application.

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 relates to the technical field of welding materials, in particular to a titanium carbide reinforced iron-based wear-resistant corrosion-resistant flux-cored wire for surfacing on the surface of a conveying roller. According to the specific technical scheme, the flux core comprises, by mass, 10%-20% of graphite, 25%-35% of ferrotitanium, 2%-6% of ferrovanadium, 3%-8% of electrolytic manganese metal, 2%-10% of ferromolybdenum, 5%-15% of ferrosilicon, 2% of aluminum-magnesium alloy and the balance Fe powder. According to the flux-cored wire prepared through the flux core, the surfacing alloy obtained through electric arc surfacing is good in surfacing manufacturability, attractive in weld joint forming and small in surface air hole number, and the flux-cored wire has high hardness, high-temperature abrasion resistance and corrosion resistance.

The invention provides a method for preparing high-purity titanium from ferrotitanium complex ore, and relates to the technical field of nonferrous metallurgy. The method comprises the following preparation steps: calculating and adding a carbonaceous reducing agent according to the components of the ferrotitanium complex ore and a specific principle, mixing and pelletizing, and reducing to generate a Fe (alloy)-TiC-MOx mixture; according to the content of TiC and Fe in the mixture, adding metal iron powder and Fe2O3 or iron ore concentrate according to a certain stoichiometric ratio, mixing, pelletizing, and reducing to obtain a titanium-iron alloy; and the obtained ferrotitanium alloy serves as a soluble anode, and high-purity titanium is prepared through electrolysis in halide molten salt containing low-valence titanium salt. According to the method, the reaction characteristic of iron and iron oxide with TiC at high temperature is utilized, the ferrotitanium alloy is generated from the ferrotitanium complex ore to serve as the soluble anode, then the high-purity titanium is prepared through molten salt electrolysis, the adverse effects of component deviation and anode precipitates existing in the soluble anode containing the titanium compound are avoided, and meanwhile casting forming is easy, and the method is more suitable for industrialization.

The invention relates to the technical field of welding rod preparation, and discloses a steel matched welding rod for a high water head of a pumped storage power station and a production method of the steel matched welding rod. The coating is prepared from the following components in parts by weight: 25.0 to 36.0 parts of calcite, 26.0 to 35.0 parts of calcined fluorite, 3.0 to 6.7 parts of calcined natural rutile, 3.0 to 7.0 parts of quartz sand, 2.5 to 4.0 parts of spray silicon iron, 5.5 to 7.6 parts of nickel powder, 0.5 to 0.8 part of sodium carbonate, 0.3 to 0.6 part of CMC (Carboxymethyl Cellulose), 0.6 to 1.0 part of sodium alginate, 5.0 to 6.3 parts of low-carbon ferromanganese, 9.0 to 11.0 parts of atomized iron powder, 1.8 to 2.6 parts of ferrotitanium, 0.6 to 1.0 part of rare earth fluoride and 0.6 to 1.0 part of zirconium dioxide; the production method comprises the following steps: uniformly mixing the raw materials of the coating according to the ratio, adding the adhesive into the mixture, and uniformly mixing; and the mixture and the core wire are added into a plodder, the coating is prepared on the surface of the core wire, then low-temperature baking and high-temperature baking are conducted, and the welding rod is obtained.

The invention provides a flux-cored wire, a manufacturing method of the flux-cored wire, a gas-shielded arc welding method and deposited metal. The flux core of the flux-cored wire comprises the following components in percentage by weight: 27.5 to 29.5 percent of rutile, 1.0 to 2.0 percent of ferrovanadium, 0.2 to 0.3 percent of bismuth oxide, 0.8 to 1.2 percent of cryolite, 12.5 to 15.0 percent of high-carbon ferrochrome, 5.0 to 6.5 percent of electrolytic manganese metal, 4.5 to 6.5 percent of metal nickel, 1.0 to 3.0 percent of feldspar, 1.5 to 2.5 percent of ferromolybdenum, 1.0 to 2.5 percent of aluminum-magnesium alloy, 32.0 to 35.0 percent of micro-carbon ferrochrome, 0.5 to 1.5 percent of ferrotitanium, 1.15 to 2.85 percent of fluorite, 0.8 to 2.0 percent of ferrosilicon and 0.6 to 1.5 percent of lithium carbonate. In the invention, the alloy content of deposited metal and the hardness of the surfacing layer are controlled by adjusting the percentage of the flux core in the total weight, the surfacing layer with excellent corrosion resistance and proper hardness is ensured to be obtained, and the service life of the wrapper roller is prolonged. And meanwhile, by controlling all the components in the flux powder of the flux-cored wire and the proportion, the flux-cored wire has excellent welding process performance.

The invention provides a flux-cored wire for marine crack arrest steel and a preparation method and application of the flux-cored wire, and particularly relates to the technical field of welding materials. The flux-cored wire comprises a steel strip and a flux core filled in the steel strip, and the flux core comprises the following components in parts by weight: 10-15 parts of rutile, 5-6 parts of quartz, 2-4 parts of ferrotitanium, 20-40 parts of sodium fluoride, 20-40 parts of potassium feldspar, 6-18 parts of manganese-silicon alloy, 4-8 parts of low-carbon ferromanganese, 1.5-2.5 parts of magnesium powder, 1.5-2 parts of rare earth ferrosilicon, 0.2-0.4 part of ferroboron, 1-2 parts of metallic nickel and 1.5-6 parts of iron powder. The ship crack arrest steel flux-cored wire has the advantages of being high in strength, good in low-temperature toughness, good in crack resistance, high in deposition rate, stable in electric arc, little in splashing, easy in slag removal and attractive in weld joint forming, and is suitable for welding of crack arrest steel at a core structure part of an ultra-large container ship.

The invention discloses a method for synergistically extracting vanadium oxytrichloride, gallium trichloride and iron-titanium alloy from vanadium slag, and belongs to the field of recycling of complex multi-metal resources. The method comprises the following steps: uniformly mixing the gallium-containing vanadium slag, carbon and chlorinated waste salt according to a certain proportion, and carrying out vacuum melting treatment to obtain a Fe-Ti alloy; then chlorine is introduced for chlorination treatment, and a gaseous product is obtained; the gaseous product is adsorbed by a molecular sieve with a function of selectively adsorbing VOCl3 to obtain VOCl3, and then GaCl3 is obtained through a cold trap. According to the method, efficient collaborative conversion and recovery of multi-metal resources of vanadium, gallium, iron and titanium in the vanadium slag are achieved, and the problems that multi-metal collaborative extraction in existing vanadium slag is difficult, and the separation efficiency is low can be effectively solved.

The invention provides a titanium-steel cylindrical part construction method, which belongs to the technical field of metal material welding and comprises the steps of sample pretreatment, sample placement and diffusion welding. According to the method, appropriate parameters such as diffusion welding temperature, time and pressure are selected, the axial load of diffusion bonding equipment is applied to the upper end of the titanium alloy cylindrical part, flowing deformation of ceramic particles is restrained through the outermost hard alloy or graphite jacket, the axial load is converted into radial load through the fluidity of the ceramic particles, and the axial load is applied to the upper end of the titanium alloy cylindrical part. The radial load acts on a laminated structure interface through the titanium alloy layer from outside to inside, a transition solid solution can be formed at the structure interface, good interface combination is achieved, meanwhile, mutual diffusion of titanium and iron elements is prevented through the existence of the middle layer, and formation of brittle ferrotitanium intermetallic compounds is avoided. The welding joint obtained through the method has the advantages of being good in combination, free of pores and cracks and the like.

The invention discloses a method for improving the toughness performance of low-alloy high-strength steel by adding rare earth cerium-iron alloy and application of the method, and belongs to the technical field of steel rolling and product development. According to the method, narrow window control is conducted on converter steelmaking, LF refining and RH vacuum treatment in an existing wide and thick plate low-alloy high-strength toughness steel production technological process, a cerium-iron alloy is added after alloying in the RH vacuum treatment process is finished and circulated, temperature measurement and oxygen determination are conducted before the cerium-iron alloy is added, and the active oxygen is smaller than or equal to 3 ppm. The method is applied to an RH vacuum treatment step of industrial production of wide and thick plate Q690E steel and comprises the following steps: adding a titanium-iron alloy and a ferroboron alloy in sequence for alloying, circulating after alloying is finished, and adding a cerium-iron alloy; and carrying out soft blowing after the RH vacuum treatment is finished. After the rare earth cerium-iron alloy is added, the average size of low-alloy high-strength steel inclusions is remarkably reduced, the average grain size is greatly small, the average width of a martensite lath bundle is narrowed by less than 200nm, and the toughness performance is remarkably 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 belongs to the technical field of welding, and relates to an 800 MPa-grade high-strength steel large heat input welding flux-cored wire and a preparation method and application thereof.The flux-cored wire comprises a coating layer and a core material, and the core material comprises, by weight, 15%-23% of low-carbon ferromanganese powder, 7%-8% of aluminum powder, 12%-18% of nickel powder, 6%-8% of calcium fluoride, 4%-6% of quartz, 5%-6% of rutile and the balance iron powder. 7-10% of ferromolybdenum, less than or equal to 3% of ferroboron, less than or equal to 2% of ferrotitanium, 0.5-1% of ferrochromium and the balance of reduced iron powder; and the coating layer is made of low-carbon steel. Under the high heat input welding condition of 200-400 kJ / cm electro-gas welding, the tensile strength of weld metal is larger than or equal to 800 MPa, and the impact energy at the temperature of 20 DEG C below zero is larger than 70 J.

The invention discloses an ultralow-temperature high-toughness non-magnetic steel flux-cored wire for a controllable nuclear fusion device and a preparation method of the ultralow-temperature high-toughness non-magnetic steel flux-cored wire. A special stainless steel strip is adopted to wrap a metal powder type flux core, and the flux core accounts for 29.6%-30.4% of the total mass of the flux-cored wire; the flux core comprises the following components: 14%-18% of electrolytic manganese, 21%-23% of chromium metal, 0.3%-1.0% of ferrotitanium, 4.4%-5.0% of nitrided ferrochromium, 27.5%-28.5% of nickel powder, 0.5%-1.0% of 52 # ferrosilicon, 8%-9% of molybdenum powder, 0.1%-0.3% of lithium fluoride and the balance of atomized iron powder. The problems that an existing non-magnetic steel welding material is insufficient in toughness and high in magnetic conductivity at the ultralow temperature of-269 DEG C are solved by optimizing flux-cored alloy elements of (nickel-chromium-nitrogen) synergistic stable austenite, matching with a manufacturing process of sealed baking and roller die drawing forming of powder at the temperature of 120-140 DEG C and a welding process protected by argon (Ar) with the purity of 99.999%. The AKV2 of a welded joint is larger than or equal to 34J at the temperature of-269 DEG C, the tensile strength is larger than or equal to 620 MPa, the relative permeability is smaller than or equal to 1.02, the problems that nitrogen of an existing solid welding wire is difficult to control, and hardening is easy can be solved, and the welding wire is completely matched with the extreme working condition of a controllable nuclear fusion device.

The invention relates to the technical field of steel smelting, in particular to a pipeline steel plate for a hydrogen embrittlement-resistant high-pressure pure hydrogen conveying pipeline and a smelting method of the pipeline steel plate. The smelting process comprises the steps of converter smelting, CAS refining, LF refining, RH refining and continuous casting. In LF refining, oxygen is determined after molten steel arrives at a station, silicon iron is added for deoxidation, and the oxygen content of the molten steel is stabilized to be 20-80 ppm; 0.10-0.35 kg of ferrozirconium is added for each ton of steel in the LF refining process, and 0.50-0.80 kg of ferrotitanium is added for each ton of steel after heating is conducted for 5-10 min. Under the equipment condition of a conventional smelting mode, through a special deoxidation mode without adding aluminum, ferrozirconium, ferrotitanium and rare earth alloy materials are added according to a specific process, and the whole process of the smelting process is optimized, so that the purity of molten steel is improved, the morphology of inclusions is improved, absorption and diffusion of hydrogen are inhibited, and a structure refining and hydrogen trap system is stably formed; the prepared pipeline steel plate shows higher hydrogen embrittlement resistance in a high-hydrogen environment, and is particularly suitable for long-term service requirements in high-pressure, variable-load and water-containing hydrogen environments.

The invention discloses a novel inclusion control method for ultra-pure steel, and relates to the technical field of steel production. The tapping oxygen content is controlled, and the tapping temperature is controlled; diffusion deoxidation is carried out in the refining slag melting process; a ferrotitanium core-spun yarn is fed before refining is finished; and the continuous casting tundish adopts an integral water gap, and full-protection pouring is carried out. According to the method, the number of oxide inclusions in steel is reduced, and the problems of large-size oxide inclusions and external inclusions caused by erosion of refractory materials easily occurring in a traditional process are solved.

The invention provides a process method for producing ferrotitanium powder by reducing ilmenite, which comprises the following steps of: uniformly mixing ilmenite concentrate with a biomass-coal mixed reducing agent, a nanoscale additive and the like, reducing in a rotary kiln under a temperature-controlled and oxygen-controlled atmosphere, quenching and cooling a product by water, and performing multi-stage ore grinding magnetic separation to obtain metal iron particles and a titanium-rich material; and preparing the two into a ferrotitanium powder product. The process integrates innovative units of raw material homogenization pretreatment, biomass-coal mixed reducing agent dynamic proportioning, LIBS + Raman spectrum on-line monitoring closed-loop control, nano CaO-Na2O composite catalyst buffer addition, finished product multistage magnetic separation reforming and the like. The product composition fluctuation is obviously reduced, the TiO2 content fluctuation is controlled within + / -0.4%, the FeO content fluctuation is controlled within + / -0.5%, the metallization ratio is improved to 90% or above, the heat efficiency is improved by about 20%, and the energy consumption per unit yield is reduced by about 15%. The ilmenite is directly, efficiently and cleanly utilized, a high-quality titanium-rich raw material can be provided for production of titanium dioxide, titanium sponge and the like, meanwhile, the byproduct high-grade iron powder is used for steelmaking, and the comprehensive utilization benefit of resources is remarkable.

The invention belongs to the field of metal material modification and roller manufacturing, and particularly relates to a production method of a double-element alloying modified carbide high-chromium cast iron roller for rod and wire rolling. Paving ferrotitanium at the bottom of a ladle, smelting molten iron on the outer layer of the roller by adopting an intermediate frequency furnace, and discharging when the components reach the standard and the temperature of the molten iron reaches 1460 + / -20 DEG C; after the molten iron subjected to titanium alloying treatment is subjected to slagging-off treatment at a tapping station, Ce particles are packaged in a hollow iron sheet pipe, the hollow iron sheet pipe is inserted into the molten iron after the two ends of the hollow iron sheet pipe are closed, and mechanical stirring is conducted for 1-3 minutes; and when the temperature of the molten iron subjected to Ti and Ce double alloying is reduced to 1440-1450 DEG C, the molten iron is poured into a rotating mold at a constant speed for centrifugal pouring. The size and distribution of carbides are modified mainly through double-element alloying, the abrasion resistance of the slitting roller is improved, the protection effect of a matrix on the carbides is enhanced, the toughness of a slitting blade is improved, the tipping occurrence rate is reduced, and therefore the rolling efficiency is improved.

The invention discloses a ferrotitanium vacuum arc furnace machining device and method based on dynamic electrode regulation and control. The ferrotitanium vacuum arc furnace machining device comprises a furnace body (1); a crucible (2); a graphite electrode (3); the cylindrical protective shell (4) is fixedly connected to the top of the furnace body and is positioned outside the graphite electrode; the first gas pipeline (5) is obliquely communicated between the side wall of the furnace body and the upper part of the cylindrical protective shell, and the first gas pipeline is used for introducing high-pressure inert gas; and the second gas pipeline (6) is horizontally communicated between the side wall of the furnace body and the lower part of the cylindrical protective shell, and is used for introducing low-pressure inert gas. The method has the beneficial effects that the high-pressure inert gas and the low-pressure inert gas can form an air curtain covering the surface, especially the tail end, of the graphite electrode at the intersection, sublimated carbon particles are inhibited from being diffused to a molten pool, and meanwhile a trace amount of oxygen is isolated to prevent oxidation.

The invention belongs to the technical field of ferrous metallurgy, and relates to a process method for producing low-alloy steel by using high-titanium molten iron, which comprises the following steps of: measuring temperature and sampling after converter smelting is finished, stopping slag by adopting a slag stopping cone after a tapping condition is met, and controlling the slag discharge quantity to be lower than a first set value; after 30 seconds of tapping, aluminum blocks are added for deoxidation, so that the content of Al in the molten steel is larger than 0.01 wt% when tapping is finished; manganese-iron alloy is added, so that the content of Mn in the molten steel is 0.2-0.5 wt%; the clearance of the molten steel is guaranteed to be larger than 800 mm, and preparation is made for adding the high-titanium molten iron; the adding amount of the high-titanium molten iron is X; and ferrotitanium is supplemented, so that the content of Ti in the molten steel is 0.035-0.045 wt%, and the components of the molten steel meet the control target. The method has the beneficial effects that a proper amount of high-titanium molten iron is supplemented after converter tapping, the burden of converter smelting is not increased, the components of the molten iron are fully utilized to carry out low-alloy steel deoxidation and microalloying operation, the purposes of reducing the titanium preparation cost and the deoxidation cost are achieved, recycling of carbon, silicon, manganese and titanium elements is increased, and the purposes of reducing the cost and improving the efficiency are achieved.

The invention belongs to the technical field of metal corrosion and protection, and particularly relates to a water-based low-zinc heat-resistant anticorrosive coating and a preparation method thereof. The coating comprises the following components in percentage by mass: 30% of a lithium silicate adhesive, 14% of lithium silicate, 0.4% of sodium alginate, 10% of distilled water, 0-4% of an Al sheet, 10% of ferrotitanium powder, 16-18% of zinc powder, 8% of zinc oxide, 0-4% of conductive mica powder, 1% of titanium dioxide, 2-4% of low-melting-point glass powder, 0.2% of a defoaming agent, 0.2% of a flatting agent and 0.2% of a dispersing agent. The obtained coating comprises a physical shielding layer or an electrochemical protection layer, wherein the physical shielding layer is of a compact network structure formed by low-melting-point glass powder and Al sheets; and the electrochemical protection layer takes zinc powder as a sacrificial anode and conductive mica powder as an auxiliary conductor. The invention aims to overcome the limitation of the traditional anti-corrosion technology, so that the coating can still keep excellent anti-corrosion performance in high-temperature environments such as workshops and industrial furnaces.

The application 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 thereof. The high-temperature-resistant flux-cored wire containing rare earth elements comprises a wire sheath and a core; the core comprises the following raw materials: dehydrated rutile, dehydrated potassium feldspar, zircon sand, metal chromium powder, metal nickel powder, electrolytic manganese, ferrotitanium, aluminiferous iron, potassium cryolite, potassium titanate, sodium titanate, iron powder, yttrium-based iron alloy powder, atomized ferrosilicon, chromium-iron nitride, bismuth oxide, an additive, and the balance of reduced iron powder; the additive is a mixture of zirconium-iron alloy, ferrotitanium alloy and aluminum-magnesium alloy. The application introduces a specific alloy additive into the core to protect the transition of the rare earth yttrium, optimizes the welding performance of the yttrium and multiple components in cooperation, matches the 253MA heat-resistant steel, adjusts the components of the molten slag and the electric arc, and reasonably processes the technology, so that the welding quality of the wire is improved.

The present invention discloses a molybdenum-containing heat-conducting austenitic manganese steel and a preparation method thereof, which relates to the technical field of molybdenum-containing manganese steel and comprises the following processes: mixing pig iron and pure iron and melting them; adding ferrochrome, ferromanganese, ferromolybdenum, ferrotitanium, ferroniobium and chromium nitride, and continuing to melt to form molten steel; discharging the furnace and casting to obtain a blank; and performing heat treatment to obtain austenitic manganese steel. By adding element molybdenum to the manganese steel, carbides are formed with carbon in the manganese steel and are dispersed in the steel, which can optimize the morphology and distribution of carbides in the austenitic manganese steel, reduce defects in the manganese steel, and inhibit dislocation movement, which helps to improve the thermal conductivity of the manganese steel; at the same time, solute atoms around it are depleted, which can further improve its thermal conductivity.

The utility model discloses magnetic separation equipment for ferrotitanium powder production, relates to the technical field of magnetic separation devices, and aims to solve the technical problems that a direct flow channel of the current magnetic separation equipment is low in adsorption efficiency, the separation quality is influenced, materials are easy to remain in the direct flow channel, and the current magnetic separation equipment is inconvenient to clean. A support is fixed to the outer side of the barrel, the base mechanism is installed at an opening in the lower end of the barrel and is composed of a bottom barrel and a drainage pipe, the drainage pipe is installed in the middle of the bottom barrel in a penetrating mode, the storage disc is installed on the inner side of the bottom barrel in a clamped mode, a pipe clamping opening is formed in the middle of the storage disc, and the pipe clamping opening is in butt joint with the drainage pipe. The driving mechanism is installed at the top end of the interior of the barrel and composed of a feeding barrel and a connecting shaft. The utility model has the advantages that the roundabout feeding channel is matched with the magnetic structure for all-directional adsorption separation, the separation quality is ensured, the material residue is avoided, and the cleaning is convenient.

The utility model discloses a ferrotitanium powder raw material feeding lifting device, relates to the technical field of ferrotitanium powder raw material conveying, and aims to solve the technical problems, the ferrotitanium powder raw material feeding lifting device comprises a conveying pipe, a feeding mechanism and a reducing mechanism, the feeding mechanism and the reducing mechanism are arranged on the conveying pipe, a conveying fan is arranged at the initial end of the conveying pipe, and a lifting pipe is arranged at the tail end of the conveying pipe. The reducing mechanism comprises an adjustable reducing pipe and a discharging pipe, the adjustable reducing pipe comprises arc-shaped plates arranged in an array mode, the lower portions of the arc-shaped plates are rotationally connected with the inner wall of the lifting pipe, an electric push rod is arranged on the upper portion of the outer surface of the lifting pipe, and a piston rod of the electric push rod is connected with the upper portions of the arc-shaped plates; and the discharging pipe is arranged at the upper end of the lifting pipe. The ferrotitanium raw material powder conveying device is provided with an adjustable and variable-diameter pipeline structure, and has the advantages that the airflow speed can be effectively increased, the material carrying capacity is enhanced, the problem that ferrotitanium raw material powder slides downwards due to the gravity of the ferrotitanium raw material powder is effectively solved, and it is guaranteed that the materials are conveyed upwards continuously and stably.

The invention discloses a high-hardness wear-resistant flux-cored wire for open arc surfacing of coal mine machinery, which belongs to the technical field of welding materials and consists of flux-cored powder and a carbon steel strip. The flux core powder comprises the following raw materials of 20%-80% of high-carbon ferrochrome, 1%-8% of high-carbon ferromanganese, 1%-10% of graphite, 1%-5% of ferrotitanium, 1%-5% of silicon carbide, 0.5%-4% of boron carbide and 0.1%-2% of cryolite. The welding wire is applied to repairing of the chain wheel of the scraper conveyor of the coal mine, the service life is 2.3 times that of a common welding wire, and the comprehensive cost is reduced by 40%.

The invention provides a method for efficiently separating iron and titanium from low-grade ilmenite, and belongs to the technical field of ferrotitanium resource recovery. According to the method, fine-ground ilmenite is subjected to flotation, acid leaching and alkaline leaching, impurity elements such as silicon, calcium and magnesium in the ilmenite are removed, and high-purity ilmenite is obtained; and then the ilmenite is subjected to melt separation treatment, molten iron and high titanium slag containing trace impurities are obtained, and the TiO2 grade of the titanium slag reaches 90% or above. Compared with titanium slag obtained through traditional smelting, the titanium slag obtained through the method is high in titanium element content, a large number of titanium-silicon-calcium-magnesium symbionts cannot be generated, the obtained titanium slag can be directly used for subsequent smelting of metal titanium, flotation is conducted firstly, then acid leaching and alkali leaching treatment is conducted, and the acid and alkali use amount is greatly reduced. The process method can effectively solve the problem of waste of titanium resources due to the fact that the smelting titanium slag cannot be treated in the traditional industry.

The invention belongs to the technical field of high-value utilization of non-ferrous metal solid waste, and relates to a method for preparing high-purity vanadyl sulfate through calcification roasting countercurrent leaching extraction.The method comprises the steps that converter vanadium slag serves as a raw material, a calcification agent is added for roasting, and transformed vanadium slag is obtained; secondary countercurrent is conducted on the transformed vanadium slag, calcium sulfite is added in the leaching process, and reduced vanadium-containing acid leaching liquid is obtained; the leaching residues can be used for preparing ferrotitanium alloy products; vanadium and impurities are separated through the extraction circulation process of extraction, washing and reverse extraction, and the high-purity vanadyl sulfate electrolyte is prepared. According to the method, the converter vanadium slag is adopted as a raw material, and high-value utilization of the converter vanadium slag in the field of energy storage is achieved. And meanwhile, resource utilization of leaching residues obtained through secondary countercurrent leaching is achieved, and whole-process harmless treatment is achieved.

This invention relates to the field of steel bar production technology, specifically to a 400MPa grade hot-rolled ribbed steel bar and its preparation method, comprising the following steps: Step 1: Converter steelmaking, controlling the final carbon content to 0.07%-0.09%, and sequentially adding a composite deoxidizer, silicon-manganese alloy, and ferrotitanium to the ladle; Step 2: Continuous casting, using a crystallizer immersion nozzle protection casting process; employing a secondary cooling process; the superheat of the tundish is 10-15℃; Step 3: Heating, with the heating temperature controlled at 1000-1040℃; Step 4: Rolling, with an initial rolling temperature of 1000-1040℃ and a controlled rolling temperature of 900-950℃; Step 5: Cooling, with a controlled cooling temperature of 860-890℃; Step 6: Producing the finished product. This invention improves the titanium recovery rate, reduces smelting costs, and improves the mechanical properties of hot-rolled ribbed steel bars.