68 results about "Smelting" patented technology

The invention discloses a manufacture method for a slip sheet of an air conditioner compressor, relating to the parts of air conditioner compressors. The method comprises the steps of: taking the elements in percentage by mass: C 3.2-3.8%, Si 2.0-2.6%, Mn 0.5-1.0%, Cr 0.2.-0.6%, Mo 0.1.-0.6%, V 0-0.5%, B 0-0.1%, Ti 0.04-0.15%, Nb 0-0.5%, Cu 0-0.5%, P < 0.3%, S <0.1% and the balance of Fe; and carrying out smelting, inoculating, casting, grinding, quenching and tempering heat treatment, refining, polishing and ion-sulfurizing to manufacture the slip sheet product of the air conditioner compressor. According to the product, a certain amount of carbides and flake graphite and a tempered martensite substrate with good comprehensive mechanical property are formed in a cast structure, and the manufacture method overcomes the defects of high cost and tedious machining procedures of the traditional high-speed steel or stainless steel slip sheets.

The present invention relates to a casting-rolling process of magnesium alloy slab and its equipment. Said process includes the following steps: preheating magnesium alloy ingot, smelting said magnesium alloy ingot in smelting furnace with protective gas; transferring the molten magnesium alloy to front tank by means of runner rough, relaining constant temperature in front tank, feeding the molten magnesium alloy into casting-rolling machine by means of lip to make casting and rolling operation, finally using fine rolling machine to make warm-rolling and cold-rolling so as to obtain the finished product plate material with required thickness. Its equipment mainly includes smelting furnace, runner trough, front tank, lip, on-line mixed gas supply device and casting-rolling machine.

The invention belongs to the chemical technical filed, relating to production formula of an anti-aging rubber belt, which is composed of neoprene adhesive, natural adhesive, sulfur, vulcanizing agent DTDM, zinc oxide, antioxidant 4010Na, antioxidant ODA, stearic acid, paraffin, high wear-resistance carbon black, accelerator DM, accelerator Na-22 and engine oil. The preparation method is that the materials are face smelted in a face smelting machine. Then certain weight of the face smelted rubber compound is put into a vulcanizer to be vulcanized. The product is obtained after the vulcanization. The product has the advantages of low cost, anti-aging, long service life and no blooming on the surface.

The invention relates to a method for processing red mud by utilizing iron pyrites, comprising the following steps of: uniformly mixing air-dried red mud and the iron pyrites according to a certain proportion; and then heating under the condition of oxygen isolation so as to transform Fe2O3 contained in the red mud into magnetic Fe3O4. The red mud processed by utilizing the method disclosed by the invention is not only neutralized in alkalinity, but also has iron oxide content being less than 2 percent and can be used as a fire-resistant raw material; in addition, the iron oxide obtained through magnetic separation can be used as an iron smelting raw material.

The invention relates to a steelmaking production method of ultra-low silicon peritectic steel, and belongs to the technical field of iron and steel smelting. The production method comprises the working procedures of molten iron desulphurization, converter smelting, RH treatment and slab continuous casting; in the mass percent of the peritectic steel composition of the finished product, Si content is not more than 0.010%, C content is equal to 0.08-0.10%. In the invention, the production technology procedures of molten iron desulphurization, converter smelting, RH treatment and slab continuous casting are adopted, and high-quality ultra-low silicon peritectic steel of which the Si content is not more than 0.010% is produced; the technical problems that the Si content is easy to be out of limits, the inclusion control capability is insufficient, and the continuous casting slab quality is poor in the existing production technology are solved.

A NiCuSiFe alloy prepared from Ni and Cu contained waste through resmelting contains Ni (25-60 wt%), Cu (25-60), Si (8-15), impurity (less than or equal to 0.2) and Fe (the rest), and can also be used as additive for smelting refractory steel, high-weatherability steel and other alloy steel. Its advantages are low smelting point, high dispersity and deoxidizing effect in molten steel and low cost.

The invention relates to a production method of welding rod steel H08A and belongs to the technical field of ferrous metallurgy. The technical problems to be solved are that the continuous casting time is short in the production process of the welding rod steel H08A and a casting billet has obvious air bubble defects. According to the technical scheme, the production method of the welding rod steel H08A comprises steps of rotary furnace smelting, LF refining and continuous casting, wherein in the LF refining, a refining slag adjusting agent with principal components being Al, Al2O3 and CaO isadded for diffusion deoxidation, the degree of activity of oxygen in molten steel is controlled at 0.0020-0.0040%, the content of Als is 0.001-0.005%, silicoferrite is added with the content of Si controlled at 0.02-0.03%, and then calcium treatment is carried out. By establishing a reasonable molten steel control system, welding rod steel H08A continuous casting billets without internal defectscan be stably and continuously produced.

The invention provides a method for recycling rhenium from copper smelting smoke washing waste acid. The method includes the steps that A, the copper smelting smoke washing waste acid is filtered, and clear waste acid and selenium mud are obtained; B, the clear waste acid is mixed with a first precipitation agent to react, and copper-removed later liquid and copper-deposited slag are obtained; and C, the copper-removed later liquid is mixed with a second precipitation agent to react, rhenium-deposited later liquid and rhenium-rich slag are obtained, and in the clear waste acid, the copper content ranges from 0.2 g/L to 3 g/L; or the method includes the steps that A, the copper smelting smoke washing waste acid is filtered, and clear waste acid and selenium mud are obtained; and D, the clear waste acid is mixed with a precipitation agent to react, rhenium-deposited later liquid and rhenium-rich slag are obtained, and in the clear waste acid, the copper content is larger than 0 g/L and smaller than 0.2 g/L. According to the method, the high-copper waste liquid is subjected to copper and rhenium deposition step by step, the low-copper waste liquid is subjected to rhenium deposition in one step, only one kind of auxiliary material sodium thiosulfate is needed in the whole process, the copper recycling rate ranges from 95.3% to 99.8%, and the rhenium recycling rate ranges from 99% to 99.53%.

The present invention relates to a method for preparing tungsten oxide and tungsten powder from scheelite. The method uses the scheelite as a raw material and comprises the following steps: (1) conducting leaching reaction; (2) conducting filtering and washing; (3) conducting hydrogen peroxide extraction-decomposition to extract tungsten; (4) conducting hydrogen peroxide multiple dissolution-decomposition to purify tungstic acid; (5) pure tungstic acid calcination to prepare tungsten trioxide; and (6) conducting peroxotungstic acid solution spraying pyrolysis to prepare tungsten oxide and tungsten powder. The method only consumes cheap and easily available sulfuric acid, greatly reduces the decomposition cost of the scheelite and uses sulfuric acid to decompose; decomposed residues are gypsum; the gypsum can be used as building materials; the method does not produce dangerous waste alkali cooking residues, greatly reduces production and operation costs of enterprises, uses hydrogen peroxide as an extractant of tungstic acid, does not produce ammonia nitrogen wastewater, eliminates the technology of producing the ammonia nitrogen wastewater for many years in tungsten smelting, greatly reduces environmental protection costs, directly produces various tungsten end products and tungsten powder, and improves added value of products of the tungsten smelting enterprises.

The invention discloses a pair of rolling-cut type bilateral scissors and a manufacturing method thereof. The pair of rolling-cut type bilateral scissors comprises ingredients in percentage by weight as follows: 0.40%-0.65% of C, 0.15%-0.35% of Si, 0.60%-0.80% of Mn, 3.50%-6.00% of Ni, 2.5%-4.00% of Cr, 1.50%-2.50% of Mo, 2.00%-3.50% of V, smaller than or equal to 0.02% of S, smaller than or equal to 0.025% of P, larger than or equal to 4% of Cr and Mo and the balance of Fe and unavoidable impurities. The manufacturing method of the rolling-cut type bilateral scissors comprises steps as follows: smelting, ingot casting, forging, annealing, rough machining, pretreatment process (normalizing and high-temperature tempering), semifinishing, final heat treatment (quenching and tempering) and finish machining. The rolling-cut type bilateral scissors can meet the production demand of high-strength medium plates of HG980, HG108, X80 and the like, and the shearing quality and shearing tonnage of the bilateral scissors are improved.

The invention relates to a hydrogen-rich oxygen blast furnace ironmaking method, which comprises the steps of circulating a furnace top coal gas of an oxygen blast furnace into a coal gas upgrading and heating furnace, converting CO2 into CO, then feeding the CO into the oxygen blast furnace from the middle part and the lower part, feeding an upgraded coal gas from the lower part, and then feedinghydrogen at the same time, so that the reduction reaction efficiency in the oxygen blast furnace is improved, and the dosage of carbon coke and the dosage of pulverized coal are greatly reduced. A feeding device of the coal gas upgrading and heating furnace is improved, so that a reaction situation of the pulverized coal can be controlled in real time, the components of the upgraded coal gas fedinto the oxygen blast furnace can be reasonably controlled, the furnace top coal gas are recycled on the whole, and smelting heat is fully utilized.

The invention provides a glass bottle and a production method thereof and belongs to the technical field of production of glass bottles. The glass bottle is produced by the following raw materials in parts by weight: smashed glass, sodium carbonate, aluminum oxide, borax, ferroferric oxide, calcium phosphate, zirconium oxide and titanium oxide. The method comprises the following steps: (1) washing the smashed glass, then breaking the glass into granules, freezing and drying the glass granules; (2) continuously ball milling the dried glass granules and other raw materials into powder; (3) drying the powder, putting the powder into a smelting furnace, smelting and uniformly mixing the powder to obtain a mother solution; (4) producing the mother solution into glass bottles with different sizes, naturally cooling the glass bottles till the glass bottles are hardened, and then putting the hardened glass bottles into an annealing furnace; and (5) tempering and then obtaining the finished products. The anti-smashing glass bottle is simple and easily available in raw materials and low in cost; the production method of the glass bottle is simple and feasible in process; meanwhile, the glass bottle has high smashing resistance, so that the sharp sections which cause harm to the human body or animals are not formed even if the glass bottle is broken.

The invention relates to a 370MPa-yield-strength bridge steel without plate thickness effect and a production method thereof. The bridge steel comprises the following components in percentage by weight: 0.10-0.16% of C, 0.025-0.50% of Si, 1.0-1.55% of Mn, at most 0.015% of P, at most 0.010% of S and 0.02-0.05% of Nb. The production method comprises the following steps: smelting and continuously casting into a blank by a clean steel technique; heating the casting blank; rolling; and cooling for later use. The invention has the advantages of fewer added alloy elements and simple rolling technique, and is easy to control; the maximum fluctuation value of the yield strength of the produced 10-80mm steel plates is less than or equal to 20MPa, especially the fluctuation value of the yield strength of the 50-80mm steel plates is less than or equal to 15MPa, and thus, the bridge steel almost has no plate thickness effect, and is easy for processing and use; and the bridge steel is especially suitable for splicing, welding and other processing modes for different steel plates, and can obtain even and uniform integral structure strength and higher safety performance.

The invention provides a method for relieving pattern segregation of spring steel. The method for relieving pattern segregation of the spring steel comprises the following steps of (1) conventional smelting and control over the temperature of an upper continuous casting platform; (2) the process of two-time fire cogging of a square billet with the dimension being 185*185 mm; and (3) the process of high-speed rolling for steel products the diameter of 14 mm, wherein the heating temperature is 1020-1150 DEG C, the temperature of a soaking zone is 1020-1080 DEG C, and the temperature difference between an upper fracture surface and a lower fracture surface is smaller than or equal to 15 DEG C; the time in the furnace is 120-150 min, the start rolling temperature is 930-960 DEG C, the inlet temperature of a finishing mill is 870-900 DEG C, the inlet temperature of a reducing sizing mill is 830-850 DEG C, the finish rolling temperature is 820-850 DEG C, the outlet speed for pre-finishing is not greater than 8 m/s, and the largest roller speed of a Stelmor controlled cooling line is not greater than 33 m/s; and a 1# fan, a 2# fan are opened by 35%, and other fans and a heat preservation cover are completely opened. Compared with the prior art, by adoption of the method, the problem that pattern segregation exceeds the standard, and consequentially judgment amending is caused can be completely solved, and the production cost is greatly reduced.

The invention provides the high-strength 23Mn2CrNiMnVERA steel for railway train connection and a preparation method thereof. The 23Mn2CrNiMnVERA steel comprises the following components of carbon, silicon, manganese, vanadium, aluminum, chromium, molybdenum, nickel, cerium, copper, phosphorus, sulfur, Fe and non-removable impurities; the preparation method comprises the steps of molten iron pretreatment, converter smelting, LF refining, VD vacuum refining and continuous casting tapping. The high-strength 23Mn2CrNiMoVREA steel for connection has the advantages of being easy to weld, high in tensile property and high in yield strength at low temperature (-60 DEG C); and the preparation method of the high-strength 23Mn2CrNiMnVERA steel for the railway train connection has the advantages of being easy to control in the process and suitable for popularization.

The present invention discloses a smelting complete equipment for ferrotitanium line products and relates to the technology field of titanium ferroalloy for metallurgy. Said equipment comprises a feed position, a buttjunction position connected with the feed position, a rapid heating mechanism connected with the buttjunction position, a mixing mechanism and a smelting mechanism, wherein said rapid heating mechanism comprises a rotating furnace having one end connected to the buttjunction position, said rotary furnace is equipped with a driving mechanism for driving the rotary furnace rotating and a heating stove for heating the rotary furnace, a burning compartment is mounted at the other end of the rotary furnace and is equipped with a gas generator connected through gas barrel at its outer portion, a warm-blast apparatus is connected with the burning compartment through the gas barrel outer layer endless tube. Said rapid heating mechanism in the complete equipment exhibits short heat-up time to materials and high efficiency, and then greatly enhances accumulating efficiency of raw material, wherein the materials is heated homogeneously in the rotary furnace.

The invention discloses anti-corrosion and anti-wear high manganese steel and a preparation method thereof. The high manganese steel consists of the following components in percentage by weight: 1.0-1.2% of carbon, 14-15% of manganese, 0.48-0.6% of silicon, 10.5-12.5% of chromium, 0.5-0.6% of molybdenum, 0.3-0.5% of nickel, 0.1-0.3% of aluminum, 0.08-0.12% of copper, 0.01-0.02% of nitrogen, 0.01-0.03% of rare earth element, less than or equal to 0.03% of phosphorus, less than or equal to 0.03% of sulfur and the balance of iron. The preparation method comprises: (1) smelting: adding alloy and metal raw materials including technically pure iron, nitrided ferrovanadium, ferromanganese, technically pure aluminum and the like into an electric furnace, heating to melt all the alloy and metal raw materials, maintaining for 30 minutes at the temperature of 1,730-1,750DEG C, and discharging at the temperature of 1,460-1,500 DEG C; (2) casting; (3) heat treatment after casting; and (4) product acceptance. The anti-corrosion and anti-wear high manganese steel has the advantages of good anti-corrosion property, good anti-wear property, good impact toughness, long service life and short production period.

The invention discloses a high-purity titanium ingot purification method. The method comprises the steps of preparation of materials, loading of the materials into a furnace and electron beam melting.An electron beam furnace is adopted for melting, the temperature is raised to start electron beam smelting when the vacuum degree of a hearth of the electron beam melting furnace is maintain to be higher than or equal to 2.0*10<-2> pa, the melting temperature is controlled to be higher than or equal to 2350 DEG C, the melting speed is controlled to be higher than or equal to 25 kg/h, a titanium strip is fully melted, and a titanium ingot formed after electron beam melting is cooled in the hearth and then discharged out from the furnace. The content of iron, silicon, carbon and other impurityelements is effectively reduced, correspondingly the high-purity titanium ingot is obtained, and high-purity metallic titanium has no pores and no impurities.

The invention discloses a spray method for preparing oxidation-resisting phosphorous copper alloy powder. The spray method is characterized in that the oxidation-resisting phosphorous copper alloy powder is prepared by the following components: 500 parts of raw copper powder, 25-30 parts of tin power, 8-10 parts of phosphorus powder, 3-7 parts of benzotriazole, 3-7 parts of benzene sulfonic acid sodium salt and 6-8 parts of glycerol. By smelting the raw materials through intermediate frequency smelting equipment and adjusting the contents of copper, tin and phosphorus, the product lead-free effect is realized, and the oxidation-resisting phosphorous copper alloy powder is prepared by the spray method. The prepared oxidation-resisting phosphorous copper alloy powder has the characteristics of good sphericity, component uniformity, good moldability, excellent sinterability and low surface oxidation. The spray method is low in production cost, high in production efficiency and stable in product quality.

The invention provides a sintering machine distributing device applied to the technical field of iron and steel smelting equipment parts, and further relates to a distributing method using the sintering machine distributing device. A sintering mixing tank (3) is arranged on the upper portion of one side of a sintering machine body (1) of a sintering machine. A round roller feeder (4) is arranged under the sintering mixing tank (3). A distributing device body (5) is arranged under the round roller feeder (4) and composed of a plurality of distributing rollers (6). A distributing face (8) is formed by the upper surfaces of the multiple distributing rollers (6). The bottom of each distributing roller (6) is connected with an adjusting part (7) through a connecting base (9). According to the distributing device and the distributing method, particle segregation and sinter bed particle uniformity of a sinter mixture are achieved advantageously, the bed breathability is improved, sintering solid fuel consumption is reduced advantageously, and the sintering production cost is reduced.