23 results about "Ferromolybdenum" patented technology

The invention relates to a thermal fatigue resistant commercial vehicle brake disc and a preparation method thereof. A preparation method of the thermal-fatigue-resistant commercial vehicle brake disc comprises the steps that S1, raw materials are added into a smelting furnace to be smelted, and molten iron is obtained; s2, a ferrosilicon inoculant, a nitriding agent, ferromolybdenum and tin are added into a transfer ladle, and molten iron is injected into the transfer ladle for primary inoculation treatment; the use amount of the ferrosilicon inoculant is 0.30-0.45% of the mass of the molten iron, the use amount of the nitriding agent is 0.60% of the mass of the molten iron, the use amount of the ferromolybdenum is 0.60-0.65% of the mass of the molten iron, and the use amount of the tin is 0.06% of the mass of the molten iron; and S3, the molten iron obtained after primary inoculation treatment is transferred into a pouring ladle, then the molten iron is poured into a cavity of a brake disc pouring mold, a silicon-strontium-zirconium inoculant is added along with the flow during pouring for secondary inoculation treatment, and the brake disc is obtained after cooling.

The invention discloses a hot rolling process of a high-strength anchor rod steel bar. The hot rolling process comprises the following steps: S1, molten iron pretreatment; s2, molten iron smelting: molten iron, scrap steel and copper are added into a converter, a top-bottom combined blowing converter is adopted for blowing, and the tapping temperature is controlled to be 1620-1670 DEG C, S3, molten iron refining: 4-5 kg / t ferromolybdenum, 2-3 kg / t nickel plate and 1.5-2.5 kg / t ferrovanadium are added into the molten iron in the middle stage of refining; s4, RH vacuum degassing and soft argon blowing, wherein after RH vacuum degassing treatment, a silicon-calcium line is added for purifying molten steel, and then soft argon blowing treatment is conducted; s5, continuous casting: carrying out protective casting on molten steel in the whole process; the temperature of a preheating section is controlled to be 800-900 DEG C, the temperature of a heating section is controlled to be 980-1030 DEG C, and the temperature of a soaking section is controlled to be 1050-1080 DEG C; s7, steel billet rolling; and S8, cooling the anchor rod reinforcing steel bars. The high-strength and high-toughness composite material disclosed by the invention has relatively high strength and toughness and can be completely used under severe natural conditions in the engineering field, and the production method provided by the invention is simple, easy to implement, low in cost and suitable for industrial production.

This invention belongs to the field of ferromolybdenum alloy smelting technology, specifically relating to a two-stage continuous smelting and casting method and apparatus for ferromolybdenum alloys. This invention couples the aluminothermic rapid reduction reaction with medium-frequency induction refining. The ferromolybdenum alloy liquid is conveyed by gravity through slag blocking and sealing into the medium-frequency refining tundish, completing heat preservation, homogenization, secondary slag removal, and flow stabilization. Subsequently, it is directly and continuously cast into 30-50mm thick ingot-shaped ingots, achieving near-net-shape forming, eliminating crushing and screening. This invention solves the problems of component segregation, high oxygen content, intermittent production, large crushing losses, and severe dust pollution associated with the traditional aluminothermic process for ferromolybdenum. It features a short process, high efficiency, superior quality, environmental friendliness, and high degree of automation. The prepared ferromolybdenum ingots have uniform size, stable composition, and an oxygen content ≤80ppm, and can be directly used in special steel smelting, suitable for the continuous industrial production of high-end ferromolybdenum alloys.

The invention provides a 90kg-grade ultralow-temperature high-strength steel welding rod and a preparation method thereof, and the welding rod comprises a core wire and a coating covering the surface of the core wire, the coating is prepared from, by weight, 35%-45% of marble, 15%-20% of fluorite, 3%-5% of silica powder, 2%-4% of rutile, 1%-2% of manganese metal, 1%-2% of ferrosilicon, 15%-20% of nickel metal, 5%-10% of ferrotitanium, 2%-5% of ferromolybdenum, 0.4%-0.8% of sodium alginate, 0.3%-0.9% of sodium carbonate, 0.2%-0.5% of lanthanum oxide and the balance iron powder. According to the welding rod, under the high channel temperature welding condition, the mechanical property of deposited metal can obtain high tensile strength in the welding state and the heat treatment state, and good low-temperature toughness is achieved.

The application discloses a non-magnetic self-lubricating hardware material, which is composed of the following raw materials according to mass percentage: C 3.3%-3.8%, Si 2.0%-2.6%, Ni 10%-14%, Mo 0.5%-1.0%, V 0.5%-1.0%, Mn 0.1%-0.2%, P≤0.1%, S≤0.015%, and the balance of Fe, wherein the total of the content of the above components is 100%. The application further discloses a preparation method of the material: step 1, weighing bread iron, silicon iron, nickel plate, chromium iron, molybdenum iron, vanadium iron and carbon additive, and melting the weighed materials in a medium-frequency furnace to obtain a first liquid; step 2, pouring the first liquid into a holding furnace, and adding silicon barium inoculant and rare earth magnesium spheroidizing agent to fully stir; step 3, adopting a horizontal continuous casting method to obtain a casting; step 4, water-cooling the first metal piece in a vacuum furnace; step 5, low-temperature tempering the second metal piece in a muffle furnace; and step 6, machining the third metal piece into a hardware shape. The application solves the problems of poor wear resistance, poor corrosion resistance and large electric loss of the existing iron hardware.

The application belongs to the technical field of molybdenum iron smelting equipment, and particularly discloses a high-temperature-resistant foldable molybdenum iron smelting automatic slag discharging device, which comprises a slag poking unit and a folding unit, the folding unit comprises a base and a folding beam, one end of the folding beam is hingedly connected with the base through a hinge assembly, the other end of the folding beam is detachably connected with the slag poking unit, under the action of the hinge assembly, the folding beam can drive the slag poking unit to fold or unfold relative to the base, the slag poking unit comprises a sliding frame, a sliding table and a drill rod, the drill rod is movably connected with the sliding table at the bottom of the sliding frame, under the action of a driving mechanism, the drill rod can move forward relative to the sliding frame so that the front end of the drill rod is stretched out to quickly poke through hard slag crust and taphole clay blocking objects to realize slag discharging, after the drill rod pokes through the hard slag crust and the taphole clay blocking objects, the drill rod moves backward relative to the sliding frame so that the front end of the drill rod is quickly retracted, the device is prevented from being damaged by high-temperature molten slag, automatic operation and remote control of the slag discharging operation are realized, and the safety risk is reduced.

The utility model discloses a flue gas absorption device for ferromolybdenum roasting, which relates to the technical field of flue gas absorption and comprises a bottom plate and two hydraulic cylinders, the two hydraulic cylinders are fixedly arranged on two sides of the upper surface of the bottom plate, a fixing shell is arranged on the upper side of the bottom plate, and the tail ends of piston rods of the hydraulic cylinders are fixedly connected with the fixing shell. An air inlet pipe and an air outlet pipe are fixedly arranged on the two sides of the fixing shell respectively, an opening is formed in the bottom of the fixing shell, a sealing plate is rotationally arranged in the opening, and transmission mechanisms for driving the sealing plate to rotate are arranged on the two sides of the upper surface of the bottom plate. The bottom plate can be overturned, so that foreign matters accumulated on the bottom plate can be conveniently cleaned.

The invention relates to the technical field of alloy steel materials, and discloses high alloy steel for Cr12MoV shot blasting machine blades and a preparation method thereof.The preparation method comprises the following steps that waste steel, ferrochrome, ferromanganese, ferromolybdenum, ferrovanadium and pure iron are mixed, and molten steel is obtained after smelting, refining and slagging-off; the method comprises the following steps: adding tungsten powder and a composite reinforcing agent into molten steel, heating and mixing, casting into a steel billet, and forging and tempering the steel billet to obtain the high alloy steel for the Cr12MoV shot blasting machine blade. The composite reinforcing agent is added into the alloy steel, so that the metallographic structure of the alloy steel can be optimized, the heat-conducting property, the high-temperature resistance and the wear-resisting property can be improved, the situation that heat is not uniformly dispersed in the alloy steel and cracks are easily generated in the heating treatment process of the alloy steel is avoided, and the composite reinforcing agent and the tungsten powder can refine alloy steel material grains; the structure uniformity of the alloy steel is improved, so that the mechanical property and wear resistance of the alloy steel are enhanced.

The invention discloses a sulfur-resistant composite oxygen carrier as well as a preparation method and application thereof, and belongs to the technical field of chemical chain gasification. The oxygen carrier comprises a high-temperature-resistant inert metal oxide carrier and active components loaded on the high-temperature-resistant inert metal oxide carrier, the active components comprise MoO3 and Fe2O3, the mass ratio of MoO3 to Fe2O3 is (0.25: 1)-(4: 1), and the mass fraction of the inert metal oxide carrier is larger than or equal to 20%. The oxygen carrier is prepared by adopting a sol-gel method, and the composite oxygen carrier with a uniform structure and good dispersity is obtained by controlling the ratio of molybdenum to iron and the content of a carrier. The oxygen carrier is particularly suitable for the chemical looping process of high-sulfur fuel, can effectively resist poisoning effect caused by sulfide in a high-temperature reaction environment, and has high reaction activity, excellent sintering resistance and cycling stability.

The invention relates to the technical field of ferrous molybdate recovery, in particular to a method for recovering ferrous molybdate from high-speed steel cutting oil sludge, which comprises the following steps: crushing the oil sludge, ultrasonically removing oil by using a mixed solution and modified diatomite, and drying to obtain oil-removed dry slag; carrying out low-temperature activation on the dry residues, and leaching by using mixed acid and an auxiliary agent; cooling and centrifuging the leachate, and purifying with an adsorbent; adding ferrous sulfate and a complexing agent to prepare a solution, and precisely filtering to obtain a mother solution; adding a seed crystal and a guiding agent into the mother liquor for sectional temperature control crystallization; tail gas and waste water are recycled after being treated, and the whole process is efficient and environmentally friendly. According to the method, oil removal is thorough, ferromolybdenum leaching is enhanced, impurities are inhibited, liquid preparation is accurate, and the crystallization quality is good. Closed-loop recycling of tail gas and waste water is achieved, secondary pollution is avoided, the process is coherent and adapts to industrialization, the resource utilization rate and the product quality are improved, and economic and environmental benefits are achieved.

This invention provides a flux-cored welding wire, its preparation method, and its application, belonging to the field of welding technology. The flux-cored welding wire of this invention comprises a steel strip and a flux core, wherein the flux core is filled in the steel strip. The flux core comprises the following raw materials in the following mass percentages: ferrosilicon 3%~8%; ferromanganese 15%~22%; nickel powder 2.5%~3.5%; ferromolybdenum 0.5%~1.2%; ferrotitanium 0.8%~1.5%; ferroboron 0.05%~0.1%; aluminum powder 0.08%~0.15%; cerium oxide 0.05%~0.15%; the balance being iron powder and unavoidable impurities. This invention's flux-cored welding wire, by introducing appropriate proportions of ferrotitanium, ferroboron, aluminum powder, and cerium oxide into the flux core, ensures that the weld deposited when welding thick metal plates has low porosity, high strength, and excellent low-temperature toughness, thereby effectively meeting the welding requirements of thick-walled ethylene spherical tanks.

The utility model relates to the technical field of ferromolybdenum smelting, and discloses an auxiliary material proportioning bin for ferromolybdenum smelting, which comprises a base, the upper surface of the base is fixedly connected with bilaterally symmetrical support frames, a collecting hopper is fixedly connected between the two support frames, and the lower surface of the collecting hopper is fixedly connected with a transmission channel. Material distribution boxes are fixedly connected to the sides, close to each other, of the two supporting frames, a connecting plate is fixedly connected between the two material distribution boxes, sliding groove plates which are in bilateral symmetry are fixedly connected to the upper surface of the connecting plate, a first motor is fixedly connected to the lower surface of the connecting plate, and a straight gear is fixedly connected to the output end of the first motor; and another same straight gear is arranged on one side of the straight gear. According to the screening device, the first motor drives the straight gear to rotate, the half gear is driven to be meshed with the rack plate, and internal raw materials are screened through the screening box. And the screened raw materials are fed into the conveying channel through the collecting hopper, so that uniform screening and rapid conveying are realized, and the production efficiency is remarkably improved.

The invention belongs to the technical field of metallurgy and steelmaking, and relates to a preparation method of Mo-containing slag steel for molten steel alloying. The method comprises the following steps: firstly, adding a molybdenum oxide block into a partitioned slag basin partition groove, and then pouring a large ladle of casting slag; and the casting residue basin is hoisted to a condensation area, after cooling, manufacturing of the molybdenum-containing slag steel is completed, and the molybdenum content of each molybdenum-containing slag steel is 4%-8%. Steel and iron materials and alloy elements wasted in the steelmaking process are used for reduction of molybdenum oxide, the reduction cost is reduced, by using the Mo-containing slag steel, utilization of the alloy elements in the slag steel can be increased, slag in the Mo-containing slag steel is target slag for refining, top slag components are not affected, and meanwhile use of slag making materials can be reduced. The prepared material not only has the advantage of saving steel ladle top slag, but also has the yield of Mo in an initial detection component after the molybdenum-containing slag steel is used up to 98% or above, the detection component meets the production requirement, and the molybdenum-containing slag steel can replace ferromolybdenum to carry out alloying operation.

This invention belongs to the field of metallurgy and steelmaking technology, and relates to a method for preparing Mo-containing slag steel for steel alloying. The invention first adds molybdenum oxide blocks to a segmented slag basin, and then pours in ladle casting residue. The casting residue basin is then hoisted to the cooling zone, and after cooling, the Mo-containing slag steel is produced, with each block containing 4% to 8% molybdenum. This invention utilizes the steel scrap and alloying elements wasted during steelmaking to reduce molybdenum oxide, reducing reduction costs. The use of Mo-containing slag steel increases the utilization of alloying elements in the slag steel, and the slag in the Mo-containing slag steel is the target slag for refining, not affecting the top slag composition. Simultaneously, it reduces the use of slag-forming materials. The prepared material not only has the advantage of saving ladle top slag, but also shows that the initial Mo recovery rate in the Mo-containing slag steel after use reaches over 98%, and the tested composition meets production requirements, making it a suitable substitute for ferromolybdenum in alloying operations.

The present application belongs to the field of steelmaking, and particularly relates to a low-cost smelting method of low-carbon molybdenum-containing steel. The method comprises controlling a higher end-point C content in the converter tapping process to avoid over-oxidation of the molten steel and thus reduce iron loss; using a lower-cost high-carbon alloy to replace a high-cost low-carbon alloy in the converter tapping process; heating the molten steel and adjusting the composition of the molten steel to a certain range in the LF refining process; and adding molybdenum oxide balls containing ferrous oxide in the RH process under vacuum conditions to decarburize under vacuum and reduce the molybdenum oxide. According to the method of the present application, the converter tapping process does not need low-carbon tapping, and the oxidizability of the molten steel can be reduced to reduce iron loss. Meanwhile, the present application uses a low-cost high-carbon alloy and molybdenum oxide to replace a high-cost low-carbon alloy and molybdenum-iron alloy, respectively, and eliminates the high-energy-consumption and high-pollution molybdenum-iron smelting process, thereby greatly reducing the smelting cost of low-carbon molybdenum-containing steel.

The invention provides a multi-wire high-efficiency submerged-arc welding flux for a ship EH460 steel plate and a preparation method. The multi-wire high-efficiency submerged-arc welding flux comprises 20-25% of light magnesium oxide, 5-7% of magnesium-rich clay, 17-20% of illite, 15-17% of fluorite, 20-22% of argil, 5-7% of high titanium slag, 5-7% of manganese dioxide ore, 2-2.5% of ferrosilicon alloy, 3-5% of calcium carbide, 1-2% of ferro-nickel alloy and 2.5-3.5% of ferromolybdenum carbide. The welding flux is matched with an EM14K welding wire to be suitable for high heat input direct current and alternating current (single-wire or multi-wire welding), a weld joint has appropriate tensile strength, yield strength and ductility, meanwhile, good low-temperature impact toughness is achieved at the temperature of-50 DEG C, various mechanical properties are stable and excellent, and the welding flux is suitable for large-heat input direct current and alternating current (single-wire or multi-wire welding). And the requirements of ship construction sites on submerged-arc welding materials based on construction efficiency and mechanical properties can be met.

This invention relates to the field of hardface welding flux-cored wire technology, specifically to a multi-alloy wear-resistant flux-cored wire, its preparation method, and its application. The multi-alloy wear-resistant flux-cored wire comprises a tubular outer layer formed from low-carbon steel strip and a flux core filled within the tubular outer layer. The flux core comprises the following components: high-carbon ferrochrome, ferromolybdenum, ferrovanadium, ferroniobium, ferrotungsten, ferrotitanium, graphite, nickel powder, manganese powder, rhenium powder, cerium powder, lanthanum powder, and reduced iron powder. This invention, by introducing cerium, lanthanum, and rhenium into the Fe-Cr-Mo-V-Nb-W-Ti alloy system, effectively suppresses σ-phase precipitation and improves the wear resistance of the weld overlay. This allows the weld overlay to maintain high hardness while also possessing excellent low-temperature impact toughness and stable wear resistance, thus effectively overcoming the defects of existing hardface welding flux-cored wires, such as easy embrittlement and insufficient wear life during service.

The present application relates to the field of rotary kiln, and discloses a rotary kiln waste heat recovery device for molybdenum iron smelting and a use method thereof. The present application aims to solve the problem that the rotary kiln usually recovers waste heat through a heat exchanger during operation, but the temperature of the outer wall of the rotary kiln cylinder can also reach a high temperature. The existing equipment recovers waste heat from the outer wall of the cylinder, and the heat absorbed is consumed in the transfer process, which fails to effectively convert heat, thereby wasting the heat generated by the rotary kiln. After the rotary kiln smelts molybdenum iron, the subsequent vibrating screen processing equipment is subjected to a large weight and is abraded, which affects the service life of the subsequent equipment. The waste heat recovery device can recover the waste heat from the outer wall of the cylinder, and the recovered heat energy can be quickly utilized, and the dust and impurities generated by the rotary kiln can be reduced.

The invention relates to the technical field of precious metal recovery, and particularly discloses a multi-element synergistic separation method for ferro-molybdenum smelting soot, which comprises the following steps: collecting the smelting soot, and carrying out preliminary separation on the smelting soot to obtain target soot; carrying out adhesion treatment and volatilization-assisting pretreatment on the target cigarette ash to obtain treated cigarette ash; the treated soot is subjected to rhenium separation treatment according to a first separation temperature, separated rhenium and rhenium-removed soot are obtained, and the first separation temperature is related to the volatilization temperature of a rhenium compound; the rhenium-removed soot is subjected to silver extraction operation, and separated silver and a silver-removed material are obtained; and performing molybdenum extraction operation on the silver-removed material to obtain separated molybdenum. A traditional molybdenum recovery method is improved, a multi-element collaborative separation method is adopted, mutual interference of different elements in the separation process is effectively avoided, the separation rate of molybdenum, silver and rhenium resources is increased, the resource utilization rate is increased, and therefore the enterprise operation benefits are improved.

The invention discloses a coating for a boiler pipeline 20MoG steel matched welding rod and application of the coating, and relates to the technical field of welding materials.The coating of the welding rod comprises, by weight, 400-500 parts of marble, 300-400 parts of fluorite, 50-100 parts of barium carbonate, 50-100 parts of ferrosilicon, 10-20 parts of ferromolybdenum, 3-8 parts of magnesium powder, 2-6 parts of sodium silicotitanate and 0.1-2 parts of potassium fluoborate. 1-5 parts of sodium alginate and 10-20 parts of sodium carbonate. According to the welding rod coating, sodium silicotitanate is added, during welding, silicon dioxide and sodium oxide are decomposed by sodium silicotitanate at high temperature, silicon dioxide can reduce the viscosity and temperature of slag and facilitate separation of a welding seam and the slag, and sodium can stabilize an electric arc and facilitate the regular shape of a molten pool and interaction with raw materials for slagging and gas making such as marble and fluorite; and the slag removal rate of the welding seam is improved.

The present application relates to the technical field of welding material, in particular to a kind of composite carbide reinforced single-tooth roller surface high-temperature wear-resistant flux-cored wire.The specific technical scheme is as follows: a kind of flux-cored wire, by mass percentage, comprising the following components: graphite 5-10%, high-carbon chromium iron 20-50%, silicon carbide 2-5%, tungsten carbide 2-6%, electrolytic manganese 1-4%, niobium iron 10-20%, vanadium iron 3-7%, molybdenum iron 15-25%, and the rest is Fe powder.The flux-cored wire prepared by the flux-cored wire of the present application has good surfacing process, beautiful weld formation, and few surface pores, and also has high hardness and high-temperature wear resistance.

The application provides a nickel-based welding rod and a preparation method thereof, and particularly relates to the field of welding materials. The nickel-based welding rod comprises a welding core and a coating, and the coating comprises the following components and the weight fractions of the components are as follows: 23-29 parts of marble, 15-22 parts of fluorite, 2-8 parts of metallic chromium, 5-10 parts of barium carbonate, 1-5 parts of phlogopite, 10-16 parts of ferromolybdenum, 0.4-0.9 parts of sodium alginate, 5-10 parts of cryolite, 3-9 parts of tungsten powder, 1-4 parts of atomized iron powder, 1-4 parts of potassium titanate, 0.8-1.5 parts of titanium white powder, 1-6 parts of rutile, 0.1-0.8 parts of antimony oxide, 2-6 parts of ferrotitanium, 2-6 parts of zircon, and 1-4 parts of nickel powder. The nickel-based welding rod has good performances of resisting active gas, resisting caustic medium and resisting reducing acid medium corrosion, and has the characteristics of high strength, good plasticity, cold and hot deformation and processing.

The present application relates to the technical field of welding, and proposes a flux-cored wire for overlaying repair and a preparation method thereof.The flux-cored wire for overlaying repair comprises a core and a sheath, and the raw material of the core comprises the following components in parts by weight: 8-12 parts of aluminum powder, 2-5 parts of feldspar, 4-8 parts of silicon manganese, 10-17 parts of ferromolybdenum, 12-16 parts of ferrochrome, 8-14 parts of reinforcing agent, and 20-26 parts of iron powder; the reinforcing agent comprises sodium fluoroborate, rare earth fluoride and tungsten carbide.Through the above technical solution, the problem of low tensile strength of deposited metal in the related art is solved.