33results about How to "Reduce process consumption" patented technology

The invention discloses a preparation method of low-carbon acid-resistant pipeline steel. The preparation method comprises the steps of performing slag-skimming treatment on molten iron after pre-desulfurization to obtain the molten iron with the sulfur content of not more than 0.001%; smelting the molten iron with the sulfur content of not more than 0.001% by a dephosphorization converter to obtain semi-molten iron with C of not less than 3.3%, P of not more than 0.040% and T of not less than 1320 DEG C; smelting the semi-molten iron by a decarbonization furnace to obtain molten steel with the C content of 0.015%-0.025%; performing heating, desulfurization and component adjustment treatment on the molten steel by an LF (ladle furnace), and then controlling the carbon pick-up in the molten steel to be not more than 50ppm; performing deep degassing treatment on the molten steel with the carbon pick-up of not more than 50ppm by an RH refining process, and then performing continuous casting to obtain a plate blank. The preparation method of low-carbon acid-resistant pipeline steel, provided by the invention, has the advantages that the production consumption is reduced and the production cost is saved by optimizing a smelting process.

The invention discloses a preparing method of high-performance double-phase, rare-earth, permanent magnetic material by hydrogenation thermal treatment. Firstly, it adopts vacuum welting method to prepare alloy; secondly, adopts fast quenching method or mechanical alloying method to prepare prealloy powder; then, places the prealloy powder in a hydrogen processing device, vacuumize the device and charges in hydrogen for hydrogen absorption and dehydrogenation reactions at 600-1000 deg.C; and finally, adopts adhesion process, cold press process, and thermal press or thermal stress process to prepare an alloyed magnet. It has better synthetic permanent magnetic performance, and its producing device and process are simple, and the consumption of process is low.

The invention relates to an armor steel plate with a high anti-bullet property and a manufacturing method of the armor steel plate. The armor steel plate comprises chemical components in percentage by weight as follows: 0.20%-0.28% of carbon, smaller than or equal to 0.10% of silicon, 0.20%-0.50% of manganese, smaller than or equal to 0.012% of phosphorus, smaller than or equal to 0.003% of sulfur, 0.90%-1.30% of chromium, 0.20%-0.40% of molybdenum, 0.015%-0.035% of titanium, 0.020%-0.050% of aluminum, smaller than or equal to 0.00020% of hydrogen, smaller than or equal to 0.0040% of nitrogen, smaller than or equal to 0.65% of carbon equivalent and the balance of iron and inevitable impurities. The hardness of armor steel with the high anti-bullet property reaches 480-550 HBW, the shock absorption energy at the temperature of subzero 40 DEG C is larger than or equal to 20 J, and the armor steel plate has penetration resistance, can prevent armor steel from cracking, breaking or stripping and has the characteristics of low cost, stable quality, simplified process and easiness in large-scale industrial production.

The invention discloses a heat-resistant, halogen-free, low-smoke, and flame-retardant non-crosslinked polyolefin composition for cables, which is characterized in that: the raw materials of the composition include the following components in parts by weight: ethylene-vinyl acetate copolymer 40-60 parts of compound, 20-40 parts of linear low density polyethylene (LLDPE), 160-180 parts of inorganic hydroxide, 6-20 parts of phase solvent, 1-5 parts of synergist, 0.5-1.5 parts of stabilizer; It can improve the heat resistance of the material, and its working temperature can be as high as above 90°C. At the same time, it can reduce process consumption and manufacturing cost, and has excellent mechanical properties and processing properties. It can be recycled and has no pollution to the environment.

The invention relates to a seamless steel tube, in particular to a molybdenum-base rare earth powder metallurgy forming plug used by a high nickel-chromium stainless steel seamless pipe and a manufacturing method thereof. The manufacturing method of the molybdenum-base rare earth powder metallurgy forming plug comprises the following steps of: simultaneously mixing four rare earth oxides of ZrO2,Y2O3, La2O3 and SC2O3 in pure molybdenum powder; mixing molybdenum-base material to prepare powder by using an ultrasound characteristic; packaging the powder into a vane mixing blender, dispersing mixed molybdenum-base rare earth powder by primary refining; dispersing homogenized molybdenum-base rare earth powder by ultrasound refining through an ultrasound transducer; screening by a 180-mesh equalizing screen in accordance with a configured Tyler standard in a 'vibrating screen classifier' to obtain screen under flow, namely blended qualified molybdenum-base rare earth powder; and manufacturing the molybdenum plug by an isostaticmoulding mold, demolding and cleaning, and finishing the manufacturing in a configured hydrogen atmosphere roaster, a hydrogen atmosphere pre-sintering furnace and a hydrogen atmosphere horizontal intermediate frequency furnace. The molybdenum-base rare earth powder metallurgy forming plug and the manufacturing method thereof can be widely applied to chemical industry, metallurgy, machinery, aviation, national defense and other industrial departments.

The invention relates to a product obtained by comprehensively utilizing casting slag and a preparation method for the product. The product comprises the following components in percentage by weight: 86 to 96 percent of low-silicon-aluminum killed steel casting slag with the particle size of less than or equal to 5mm, 1 to 6 percent of fluorite, 3 to 8 percent of aluminum powder, and an inorganic binder which accounts for 2 to 4 percent of the total weight of the raw materials. The preparation method for the product comprises the following steps of: crushing the low-silicon-aluminum killed steel casting slag; uniformly mixing the materials; adding the inorganic binder and stirring uniformly; pelletizing and controlling the alkalinity of pellets to be 5.0 to 6.0; roasting; and taking out of a furnace for later use. The invention provides a low-silicon-aluminum-killed-steel-casting-slag-based refining agent and a preparation method thereof. The continuous casting slag of low-carbon low-silicon-aluminum killed steel can be comprehensively utilized, and the refining agent prepared from the continuous casting slag of the low-carbon low-silicon-aluminum killed steel is applied to a ladle furnace (LF), so that the slagging speed of the LF is high, the time of the formation of reducing white slag can be shortened, the desulfurization rate can be increased, the environmental pollution is reduced, and the production cost is reduced.

The invention relates to a 600MPa grade hot stamping steel plate with excellent performance for stamping and welding axle housing after heating and its manufacturing method. By adding elements such as Nb and V to ensure the high temperature performance of the steel, the influence of C and Si on stamping is reduced. The element content of the performance, through the combination of Ti, Al and other nitrogen-fixing elements, fundamentally ensures that the steel plate has good formability, while the high-temperature strength is improved, the low-temperature toughness is excellent, the welding performance is improved, the fatigue strength is significantly improved, and the fatigue life of the component is extended. above 50. It can be widely used in the production of medium and heavy plate rolling pieces that require high temperature strength for large structural steels that operate under high temperature conditions such as hot forming, large blowers, and vibrating screens.

The invention discloses a method for dynamically adjusting the emulsified liquid flow rate of a cold tandem rolling mill, and relates to the technical field of metallurgy. It includes using the principle of heat balance, deriving through formulas, constructing the rolling speed and emulsion flow function, and using the constructed rolling speed and emulsion flow function to control the emulsion flow according to the rolling speed. The present invention realizes the function of dynamic adjustment of the emulsion following the rolling speed by deriving the relationship between the flow rate of the emulsion and the rotational speed of the main motor of the rolling mill, and better solves the problems of the emulsion overflow and the inaccurate measurement of the thickness gauge existing in the original system , the development cost is low, the operation and maintenance are convenient, the process consumption is significantly reduced, the yield and product quality have been qualitatively improved, and economic benefits have been brought to the cold rolling production and operation.

The invention discloses a method for smelting weathering resistant steel. The method comprises the steps that pre-desulfuration processing and drossing processing are carried out on molten iron, and low-sulphur molten iron with the sulphur mass percentage composition smaller than or equal to 0.001% is obtained, wherein the drossing rate of the molten iron on which drossing processing is carried out is larger than 95%; the low-sulphur molten iron is shifted into a top-bottom combined blowing converter, 0.065-0.067 t of scrap steel and 0.032-0.05 t of nickel containing pig iron are added in each ton of low-sulphur molten iron, converter smelting is carried out, and to-be-processed molten steel with the sulphur mass percentage composition smaller than or equal to 0.06% and the nickel mass percentage composition of 0.07-0.09% is obtained; and refining processing is carried out on the to-be-processed molten steel through the CAS-OB technology, and a plate blank is obtained on the basis of continuous casting of the molten steel on which refining processing is carried out. According to the technical scheme, the content of the nickel component in the molten steel is adjusted through the nickel containing pig iron, the pre-desulfuration of the molten iron is carried out before refining, the CAS-OB technology is adopted during refining, and the cost of raw materials and production consumption are reduced; and the technical problem that in the prior art, the production cost of the weathering resistant steel is high is solved, and the production cost is reduced.

The invention discloses a method for preparing an anisotropic nanocrystalline rare-earth permanent magnet block material, which includes: firstly, preparing an alloy ingot by the vacuum smelting process; secondly, melting the alloy ingot and injecting an external direct-current electric field to the melt to realize direct-current inoculation process; thirdly, preparing an anisotropic nanocrystalline rare-earth permanent magnet material by the rapid copper mould solidification process under action of an external direct-current magnetic field; and finally processing the material in heat properly according to specific conditions. The anisotropic nanocrystalline rare-earth permanent magnet block material prepared by the method has the advantages of evident magnetic anisotropy, high density and fine comprehensive permanent magnetic performance. The method is simple in procedure, convenient in operation and low in processing consumption.

The invention relates to a method for extracting alkaloid by utilizing waste water and sludge of tobaccos, which can ensure that waste water and sludge of the tobacco industry, particularly waste water and sludge of tobacco sheets can be reasonably utilized. According to basic group activation and calcium group replacement principles, a pretreating agent is added to sludge, and the alkaloid extraction is realized through a positive-reverse cycling extraction process of alternately carrying out solvent extraction and dilute acid elution. The method mainly comprises the following steps of: pretreating sludge; drying and pulverizing; extracting the solvent; and eluting with dilute sulphuric acid, wherein the alkaloid extraction ratio is 1-3 percent of the dry weight of the sludge; and measured by a high performance liquid chromatography (HPLC), the main ingredient (occupies 80 percent) of the extractive is nicotine sulfate, and the rest alkaloid ingredients are all nicotine homologues and derivatives, which can be alkaloids such as isonicotine, nornicotine, and the like. The solvent used in the method of the invention has no color, taste and toxicity, low flammability, relative safety, no influence on environment, extremely low process loss rate and recycling capability.