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796results about How to "Stable production process" patented technology

Process for manufacturing low-silicon low-carbon deep punching/drawing steel

The invention discloses a production method of low-silicon and low-carbon deep punching/drawing steel, bottom-blowing argon is performed in the whole process of converter smelting, and a single slag/double slag technique is adopted to pour out the dephosphorized slag, high-basicity slag is produced in later period, the dualistic basicity of final slag R is more than 3.5, the terminal temperature of molten steel is 1620 DEG C to 1650 DEG C, and tapping ( P ) is less than 0.012 percent. The molten steel is refined by adopting low-silicon and low-carbon high-basicity reductive slag in a LF furnace refining station, thus to manufacture reductive slag for desulphurisation, and the ( Al ) in the molten steel is less than 0.005 percent. The molten steel refined by the LF furnace is vacuum-treated by a RH vacuum furnace, the carbon and the silicon in the molten steel is circularly removed, the molten steel is continuously casted into a casting blank through a CSP sheet bar conticaster, the casting blank is sent into CSP sheet bar heat continuous rolling mill and rolled into a coiled sheet after being heated in a roller hearth soaking furnace, a hot rolled coiled sheet is coldrolled into cold rolled coiled sheet through a cold tandem mill or a single mill after being acidwashed, and leveled through a leveling machine after being annealed by a cover furnace, and a leveling divided coil is stretched and divided. The production method has the advantages that the production cost of the working procedure is saved, the consumption of the refractory consumption of the converter is reduced, the equipment investment is saved, the process of the production technique is steady and smooth, the n value of the cold rolled plate is bigger than 0.23, the r value thereof is bigger than 2.1, and the deep punching performance and the extensibility are good.
Owner:湖南华菱涟钢特种新材料有限公司 +1

Steel plate with thickness of 80mm and low compression ratio for ocean engineering and manufacturing method thereof

The invention relates to steel for ocean engineering and a manufacturing method thereof, in particular to a steel plate with a thickness of 80mm and a low compression ratio for ocean engineering and a manufacturing method thereof. The steel plate comprises the chemical components with the weight percentages as follows: 0.12 to 0.16 percent of C, 0.20 to 0.40 percent of Si, 1.20 to 1.60 percent ofMn, smaller than or equal to 0.010 percent of P, smaller than or equal to 0.003 percent of S, 0.025 to 0.050 percent of Nb, 0.030 to 0.050 percent of V, 0.010 to 0.020 percent of Ti, smaller than or equal to 0.20 percent of Cr, 0.10 to 0.40 percent of Ni, smaller than or equal to 0.20 percent of Cu, smaller than or equal to 0.08 percent of Mo, 0.0250 to 0.050 percent of Al, smaller than or equal to 20ppm of O, smaller than or equal to 40ppm of N, smaller than or equal to 3ppm of H, and the remaining amount of Fe and inevitable impurities. A controlled rolling and cooling technology is adopted, the heating temperature before rolling is 1180 DEG C to 1250 DEG C, the rough rolling temperature is 1000 to 1100 DEG C, and the finish rolling starting temperature is 850 to 880 DEG C; laminar cooling is conducted after the rolling, the final cooling temperature is 640 to 680 DEG C, and the cooling rate is 5 to 15 DEG C/s; and normalizing treatment is conducted, the normalizing temperature is 890 to 910 DEG C, the heating rate is 1.4min/mm, and the heat preservation time is 50 to 90min. The obtained steel has the characteristics of high strength, good Z-direction lamellar tearing resistant performance, high plasticity, and the like.
Owner:NANJING IRON & STEEL CO LTD

Preparation of Double-sided Photoelectrolytic Copper Foil for Special Lithium Batteries

ActiveCN102277597AStable production processHigh quality and efficient material selectionElectroforming processesElectrochemical responseCopper foil
The invention relates to the preparation of a double-sided photoelectrolytic copper foil for a special lithium battery, which comprises the following steps: preparing solution of a first additive, solution of a second additive, and copper sulfate electrolyte, wherein the copper ion concentration in the copper sulfate electrolyte is 70 to 100g/L, the sulfuric acid concentration is 100 to 170g/L and the chlorine ion concentration is 0.01 to 0.04g/L, and the temperature of the copper sulfate electrolyte is 40 to 60 DEG C; adding 60 to 200 milliliters of solution of the first additive and 35 to 100 milliliters of solution of the second additive into each cubic meter of electrolyte each hour, wherein the electrolyte formed by uniformly stirring enters an electrolytic cell and the electrolysis current density of the electrolyte in the electrolytic cell is 5,000 to 6,000A/m<2>; and after electrochemical reactions are accomplished, obtaining the double-sided electrolytic copper foil for a photic lithium battery. The preparation of the double-sided photoelectrolytic copper foil for the special lithium battery has the advantages that: the unit area weight of the prepared photoelectrolytic copper foil is 87 to 89g/m<2>, the tensile strength is more than 45Kgf/m<2>, the elongation rate is more than 5 percent, the surface roughness R2 is less than 1.5 mu m, and the uniform thickness of thecopper foil is 8.6 to 9.3 mu m according to actual measurement.
Owner:合肥铜冠电子铜箔有限公司

Compound type photocatalyst air purification waterborne interior wall coating and preparation method thereof

Provided are a compound type photocatalyst air purification waterborne interior wall coating and a preparation method thereof. The compound type photocatalyst air purification waterborne interior wall coating comprises, by weight, the following materials of 5.5-22.3% of photocatalysis packing, 25-65% of polyurethane emulsion, 1-6% of propylene glycol phenylate, 2-6% of dispersing agents, 2-4% of stabilizing agents, 1-2% of wetting agents, 20-60% of water, 1.5-4% of mildewproof agents, 1-2% of antifoaming agents, 0.5-2% of flatting agents, and 0.5-1% of thickening agents. The photocatalysis packing is formed by complexation of nanoanatase type titanium dioxide and nano-zinc oxide or nano stannic oxide according to a weight ratio of 5-9:1-5. The coating has good air purifying capacity, and can effectively degrade harmful gases in the air and kill bacterial viruses under excitation of ultraviolet light. As an interior decorative material, the coating has good covering power and adhesive power and excellent stability. The coating and the production method are simple in production process, suitable for various coating methods, and easy to popularize and apply.
Owner:CHINA STATE CONSTRUCTION ENGINEERING CORPORATION +1

Industrial production method of hydrolyzed wheat protein for feeding

The invention discloses an industrial production method of hydrolyzed wheat protein for feeding, belonging to the technical field of feed additive production. In the method, through the method of synergy of multiple enzymes and combined treatment of multiple steps, the hydrolyzed wheat protein for feeding is prepared by taking wheat gluten meal and water with weight ratio of 1:10-1:2 and adding compound enzyme, ensuring the mass percent concentration of the compound enzyme in the solution is 0.2-1.4%, hydrolyzing the mixture for 1-13h under the conditions that the temperature is 30-70 DEG C and pH value is 5.0-10.0, then carrying out such processes as filtering, decoloring and drying, etc. Compared with the traditional methods, the method of the invention features mild hydrolysis conditions, sanitation and safety and maintains the original nutritive composition of amino acid free of loss; the hydrolysate is low in salt content, mellow in mouth feel and high in yield which is up to 98%. The tests that the hydrolyzed wheat protein is added in the feed for suckling pigs, chicks, calves, aquaculture and the like to be used show that the hydrolyzed wheat protein has the advantages and evident effects of improving daily feed intake, reducing diarrhea rate, enhancing immunity, slowing weanling stress, improving growth performance and the like.
Owner:郑州新威营养技术有限公司

460MPa-grade low-compression-ratio and high-toughness steel plate for ocean engineering, and its production method

InactiveCN103938108AAchieve recrystallization refinementGuaranteed low temperature impact performanceAustenite grainChemical composition
The invention relates to the field of steels material, and concretely relates to a 460MPa-grade low-compression-ratio and high-toughness ocean steel plate and its production method. The steel plate comprises 0.04-0.07wt% of C, 0.2-0.4wt% of Si, 1.0-1.5wt% of Mn, 0.010wt% or less of P, 0.003wt% or less S, 0.2-0.5wt% of Ni, 0.2-0.5wt% of Cu, 0.2-0.4wt% of Cr, 0.1-0.3wt% of Mo, 0.02-0.05wt% of Nb, 0.01-0.025wt% of Ti, and the balance Fe and unavoidable impurities. The C content, the P content and the S content are controlled in a range of 0.04-0.07%, in a range of not greater than 0.010% and in a range of not greater than 0.003% respectively. Even though compression ratio is low, the heating temperature and the rolling temperature are reduced to realize the recrystallization refinement of austenite grains and ensure the low-temperature impact performance, and tempering after rolling further improves the toughness and the microstructure uniformity. The steel plate produced by the above scheme has a tensile strength of 620- 685MPa, a yield strength of 500-570MPa and a fracture elongation of 20-25%, has (horizontal) Charpy impact energy at -60DEG C reaching 240J, has a -80DEG C low temperature impact of not lower than 150J, has a Pcm value of not greater than 0.22 and a Ceq value of not greater than 0.47, and has the characteristics of easy welding, stable production process, strong operability and the like.
Owner:JIGANG GRP

Samarium and cobalt sintered permanent magnet material and preparation method thereof

A samarium and cobalt sintered permanent magnet material comprises, in weight percent, 25-27%wt of samarium, 49-51%wt of cobalt, 5-6.5%wt of copper, 3-3.5%wt of zirconium and 15-18%wt of iron. A preparation method includes the steps: smelting; casting an ingot; absorbing hydrogen for the cast ingot; making powder; performing orientation forming and sintering. In the smelting process, the thickness of a casting mould cavity is decreased, cooling water is filled into the wall of the mould cavity, cooling of the cast ingot is accelerated, element composition segregation is decreased, the production process is stabilized, a dendrite crystal is restrained by adding a zirconium element, hydrogen absorbing is performed for the cast ingot in the smelting process, production steps are saved, and energy consumption is reduced. In the subsequent milling process, the cast ingot absorbed hydrogen is crystallized into particles, the particles fracture along crystal boundaries in the milling process of airflow, the integrality of crystal particles is ensured, the anisotropy of the crystal particles is improved, magnetic powder particles are obtained, particle size distribution is concentrated with the range of 3.5-4.5 micrometers, the sintering temperature needed by the magnetic powder particle of each point of a blank is the same in the later sintering process, the sizes of the sintered crystal particles are the same and uniform, and the performances, particularly, such as residual magnetism Br, maximum magnetic energy product (BH) max and critical magnetic field Hk of a sintered permanent magnet are improved.
Owner:NINGBO NINGGANG PERMANENT MAGNETIC MATERIALS

Polyvinyl formal sponge material with uniform abscesses and rapid imbibition and preparation method thereof

ActiveCN102020816ASolution can not be reusedSolve the shortcomings of high closed cell rate and slow water absorption rate of the productPharmaceutical non-active ingredientsAbsorbent padsCross-linkLiquid waste
The invention discloses a polyvinyl formal sponge material with uniform abscesses and rapid imbibition and a preparation method thereof. The material comprises polyvinyl alcohol, a cross-linking agent, a catalyst and a pore-forming agent, wherein the cross-linking agent is formaldehyde or paraformaldehyde or formaldehyde solution. The preparation method comprises the following steps of: stirring 2-9 parts of polyvinyl alcohol in 100-200 parts of water of which the temperature is 60-98 DEG C to obtain solution, and adding 0.05-8 parts of pore-forming agent to the solution; fully emulsifying the pore-forming agent to form evenly dispersed continuous solution phase; then adding 1-26 parts of catalyst and 1-15 parts of cross-linking agent or 5-50 parts of recovered liquid waste, 1-8 parts of catalyst and 1-15 parts of cross-linking agent, and mixing; pouring the mixture into a mould after 1-60 min for cross-linking reaction for 0.1-2 hours to form the abscesses under the action of the pore-forming agent; and continuing to heat and cure for 2-18 hours to prepare the polyvinyl formal sponge material. The invention has the advantages of good hydrophily, high compression strength, high dry wetting rate, high imbibition ratio and the like.
Owner:克林纳奇(荆州)高分子科技有限公司

Method for preparing live vaccines of hog cholera and product thereof

The invention discloses a method for preparing live vaccines of hog cholera and a product thereof. The preparation method comprises the following steps of: (1) culturing porcine passage cell lines; (2) inoculating the porcine passage cell lines with live vaccine production seed viruses of the hog cholera to obtain attenuated vaccine strains of the hog cholera; (3) performing virus multiplication on the attenuated vaccine strains of the hog cholera; (4) measuring the virus titer of multiplication virus suspension by adopting an immunofluorescence method; and (5) adding a freeze-drying protective agent and antibiotics into the virus suspension which is detected to be qualified for vaccine matching and freeze-drying. The preparation method has the advantages of producing the live vaccines of the hog cholera by using the cell lines so as to achieve small quality differences among batches and the characteristics of simple and stable process, easy operation, high yield, low cost, the feasibility and extendibility of industrial production and the like, and measuring the virus titer of the multiplication virus suspension by adopting the immunofluorescence method so as to achieve sensitive, fast, specific and accurate detection, high repeatability and reliable results. The live vaccines of the hog cholera prepared by the method can completely protect pigs from the attacks of violent hog cholera viruses.
Owner:武华

Device and production method for manufacturing automobile rear axle cast through metal mold with sand lining

The invention discloses device and production method for manufacturing an automobile rear axle cast through the sand lining process of a metal mold. The device is characterized in that a mud core component is arranged in a mold cavity formed after an upper iron mold and a lower iron mold are assembled, positions of sand shooting holes of the upper iron mold and the lower iron mold are in one-to-one correspondence, gas needles are arranged on an upper mold plate, the gas needles and the sand shooting holes of the upper iron mold are in one-to-one correspondence, a plurality of heating pipes are respectively and uniformly distributed in mold plates of the upper mold plate and a lower mold plate, a temperature control meter of the heating pipes is connected with a temperature sensor, a plurality of exhaust bosses are further uniformly distributed on the peripheries of the mold plates of the upper mold plate and the lower mold plate, water-cooling bases are respectively arranged on the upper mold plate and the lower mold plate, and a plurality of exhaust grooves are arranged on the parting surface of the upper iron mold and the parting surface of the lower mold plate. The automobile rear axle cast manufactured by adopting the device and the method is good in quality, high in size precision, high in process yield, low in production cost, good in a working environment and low in energy consumption.
Owner:浙江省机电设计研究院有限公司
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