137results about How to "Promote hardening" patented technology

The present invention provides for a lightweight metal framing member having a plurality of depressions and a plurality of reinforcing ribs on the surface thereof, the depressions and ribs both being inwardly oriented and cooperating to aid in stiffening of the metal stud. The present invention also provides a method of manufacturing a metal framing member having a plurality of depressions and a plurality of reinforcing ribs on the surface thereof, the depressions and ribs both being inwardly oriented and cooperating to aid in stiffening of the metal stud. The method utilizes a cold roll forming apparatus having a first roller with a plurality of projections on its surface and a second roller having a surface provided with holes aligned with the projections on the surface of the first roller to form the depressions in the surface of the material having clearly defined edges generally aligned with the plane of the metal sheet. A second roll forming apparatus is used having a first roller with projections on its surface to form the reinforcing ribs in the surface of the sheet material and a second roller to allow for a softer transition between the surface of the sheet material and the edges of the reinforcing ribs and so as not to unduly deform the depressions formed in the first roll forming step. A third roll forming apparatus is used having rollers to form the metal stud or track.

The invention relates to an organic-inorganic composite combined advanced monolithic refractory which has the formula of 40 to 56 percent of 5-1mm corundum or bauxite, 12 to 30 percent of 1-0.0088mm corundum or bauxite, 16 to 25 percent of corundum or bauxite with d90 less than 0.088mm, 0 to 5 percent of alpha alumina micropowder, 1 to 8 percent of hydratable alumina, 1 to 6 percent of siliceous dust, 0 to 2 percent of calcium aluminate cement, 0.05 to 0.4 percent of external efficient water reducing agents (polycarboxylic acid plus sulfonation naphthaldehyde polymer plus sulfonation melamine polymer), 1 to 6 percent of latex of the system of external polyacrylic acid, 1 to 6 percent of external water and 0 to 3 percent of external heat-resistant steel fiber. Casting materials of the invention have excellent performances of condensation, hardening, demoulding, drying and heating and are suitable for high-temperature furnace projects with changeful field conditions.

An impact-resistant and wear-resistant high-elasticity and high-strength steel, wherein the steel contains 0.26-0.48 wt% C, 1.4-2.5 wt% Si, 0.5-1.0 wt% Mn, 1.4-2.4 wt% % Cr, 0.01-0.1% by weight of Ni, 0.01-0.5% by weight of Mo, 0.005-0.04% by weight of Al, 0.05-0.1% by weight of V, 0.0025-0.02% by weight of N, the rest is Fe and unavoidable of impurities. The impact-resistant, wear-resistant high-elasticity and high-strength steel of the present invention has high hardness, high strength, high toughness and high elasticity, and the weldability, low-temperature tempering resistance and high-temperature tempering resistance, hardenability, Mechanical properties such as wear resistance, impact toughness, and tensile strength are excellent, so when used under severe conditions, the mold life and component life are much longer than conventional steels.

The invention relates to a method for controlling setting and hardening processes of magnesium phosphate cement. According to the method, the heat releasing speed of the magnesium phosphate cement is reduced by increasing addition of borax retarder to delay setting of magnesium phosphate cement mortar and adjust the setting time of the mortar within 20-150 minutes effectively, then a heat-transfer process between the mortar and an environment and the setting and hardening processes of the mortar are accelerated by increasing early environmental temperature of the mortar, and the early strength is form quickly and reaches 20-30MPa in an hour. The method solves the problem that the early strength of a magnesium phosphate cement system develops slowly due to the short setting time and a larger mixing amount of the borax retarder when the magnesium phosphate cement serves as a quick repairing material for a repairing project to some extent. Available test results indicate that the method can control the setting and hardening processes of the cement conveniently and effectively.

The invention discloses a laying hen feed for improving the flavor of eggs and a production method of the laying hen feed. The feed consists of the following raw materials in parts by weight: 250-300 parts of fermented soybean meal, 200-250 parts of brown rice powder, 180-200 parts of rye bran, 150-180 parts of maize germ, 50-60 parts of fermented ground meat, 30-40 parts of degreased fish meal, 30-60 parts of chili dregs, 15-20 parts of grape pulps, 20-30 parts of pineapple juice, 2-3 parts of semen cassiae, 1-2 parts of Chinese wolfberry root-bark, 2-3 parts of forsythia suspensa, 2-3 parts of wild chrysanthemums, 2-3 parts of dandelions, 40-50 parts of bur clovers, 30-40 parts of Chinese fanpalm leaves, 10-15 parts of antigonon leptopus, 10-15 parts of amaranthus hypochondriacus, 5-10 parts of lotus roots, 5-10 parts of common ducksmeat herbs, 100-140 parts of a 1%-1.5% dicalcium phosphate solution, and 20-30 parts of a phagostimulant. The feed disclosed by the invention has the characteristics of being concentrated, fine, fragrant crisp and the like, laying hens grow quickly, the disease resistance is strong, the laying hens lay more eggs, the raising period of the laying hens is short, and the market competitiveness is strong; the eggs are crisp, sweet and greasy, are rich in nutrition and are fresh in taste; eggshells are hard and are not easy to smash, and the storage period of the eggs is long.

The invention discloses a preparation method of a radiation-proof cement clinker mineral phase system, which comprises the following steps of: (1) raw material preparation: raw materials are uniformly mixed according to a ratio, and are ground until the amount of residues on a 180-mesh square hole sieve is less than or equal to 10%; and (2) high temperature sintering: the ground powder in the step 1 is pressed into cylindrical test pieces, and the cylindrical test pieces are placed in a corundum crucible and are calcinated for 1 to 3 hours at a high temperature in a reheating test furnace to obtain the desired mineral phase system. The raw materials are calcium carbonate, alumina, and boron oxide, or calcium carbonate, alumina, boron oxide, and iron oxide. Through the mineral phase systemprepared by the preparation method disclosed by the invention, neutrons can be absorbed, the heat consumption of a cement clinker preparation process is reduced, the normal setting and hardening of cement are promoted, the strength of cement is improved, the mass concrete cracks can be inhibited, and the durability of concrete is improved. The method provided by the invention is simple in process, is easy to control and adapts to large-scale industrial production.

The invention provides an A3.5 B05 grade autoclaved aerated concrete block made of quartz weathered sand. The high-performance A3.5 B05 grade autoclaved aerated concrete block is made by using the quartz weathered sand, cement, quicklime, industrial waste phosphogypsum, aluminum powder paste and water as raw materials. The dry density of the block is 509kg/m<3>, the average cubic compressive strength of the block is 3.6MPa, the single component minimum of the block is 3.2Mpa, the split-to-compression ratio is 0.20, the mass loss after freezing is 2.8%, the strength after freezing is 3.1Mpa, the heat conduction coefficient (dry state) is 0.1251W/(m.K), the drying shrinkage value (standard process) is 0.32mm/m, and the qualified rate is greater than 98%. The method has the advantages of reasonable treatment of raw materials, scientific formula calculation, concise production flow, recycling of production wastes. The block is a novel energy saving and environmental protection wall material, and can be industrially produced.

This invention relates to blowing with CO2 and hardening sand mould method. on one side wall of casting box or casting frame, set location holes according to given certain size and amount; when preparing sand mould, for different mould shapes, insert round bars crossed horizontally mould top to nearby of another side wall to wall holes accorded with blowing hole diameter and amount; on the base that ensures keep certain sand layer thickness between bar and mould surface and certain distance between its top and another side of sand box, fall moulding sand, ram and locate; after forming, draw out bar, form blowing air hole; cover plant plate on sand box top, blow CO2 till sand mould change to hard. This invention can fit to all cavities variety request; the product has advantages of well quality, even harden, easy to demould and convenient to convey.

The invention discloses a heat treatment method for high-strength fasteners made of SCM435 steel for automobiles, comprising steps: (1) In the heating stage, the fasteners are sent into a heating furnace, the heating temperature is controlled at 870°C ± 5°C, and methanol is passed through , the feed rate is 20-40ml/min, feed propane, control the carbon potential to be 0.40%±0.04%, and the heating time is 50-80 minutes; (2) quenching stage, the heated fastener enters the oil tank for quenching, When quenching and cooling, the oil temperature is 60-70°C, and the quenching oil is stirred in circulation; (3) Tempering stage, after quenching, the fastener enters the tempering furnace, and the tempering time is 130-170min; when the hardness requirement is 33-38HRC, tempering The temperature is 500-530°C; when the hardness requirement is 38-42HRC, the tempering temperature is 430-460°C. Passing methanol and controlling the carbon potential at 0.40±0.04% can better balance the carbon concentration inside and on the surface of the workpiece to avoid carburization and ensure that no cracks appear on the surface of the workpiece.

The invention relates to a precision investment casting water glass binder shell CO2 gas hardening technology which comprises the following steps of: (1) placing a shell to be hardened in a fully-sealed hardening chamber; (2) starting a vacuum pump to keep the sealed chamber in a vacuum state; (3) introducing CO2 gas into the hardening chamber and starting a fast dehumidifying system so that a coating layer on the shell surface is subjected to chemical reaction and physical dehydration effect together with the CO2 gas to finish the hardening of the shell; and (4) closing a CO2 gas inlet valve and starting a sucking pump to suck the CO2 in the hardening chamber back to a storage tank for circular use. Compared with the traditional technology, the technology provided by the invention has the advantages: 1, the hardening operation environment is good, harmful substances are not discharged in roasting, and thus the technology is an environmentally-friendly production technology; 2, the hardening effect is good, and the phenomenon of halfway hardening of the shell is avoided; and 3, the consumption of CO2 gas is low, and the material cost of the shell hardening agent is reduced.

The invention relates to a hot-blast furnace pipeline spray paint and an application method thereof, belonging to the field of refractory castables. The hot-blast furnace pipeline spray paint comprises the following components in parts by weight: 40-60 parts of light-weight clay brick, 3-9 parts of perlite, 10-20 parts of high-alumina cement, 20-30 parts of mullite, 5-8 parts of bentonite, 1-3 parts of dextrin powder, 2-6 parts of hydrated alumina, 5-10 parts of organic fiber, 8-18 parts of water glass, 4-9 parts of aluminum dihydrogen phosphate and 10-15 parts of magnesite powder. The spray paint provided by the invention is quick and practical to use, does not need special curing, and has favorable thermal shock resistance.

The invention provides a construction method of an anti-pull carrier pile. The construction method comprises the steps of (1) sinking a pile casing to a set depth; (2) filling a cement and sand mixture into the pile casing, and tampering the filled cement and sand mixture through a hammer; (3) repeating filling and tampering operation in the step (2), and reinforcing and compacting a soil body a certain depth below the pile tip within a certain range; (4) controlling the reinforcement and compactness degree with the three-tampering penetration degree or the filling amount as the standards andforming a carrier at the pile end; (5) continuously hammering the carrier through the hammer to form a tampering hole, or continuously hammering the carrier through the hammer to form the tampering hole and then pressing down the pile casing to follow up; (6) stopping hammering when the tampering hole in the carrier reaches up to a certain depth; (7) sinking a reinforcement cage or an anchor cablein the pile casing to enable the bottom end of the reinforcement cage or the anchor cable to go into the tampering hole of the carrier; and (8) filling concrete or cement mortar into the pile casing,and then pulling out the pile casing to form the pile.

The present invention discloses a soil conditioner rich in marine substances. The soil conditioner includes the following raw materials by weight: 20-50 parts of an oyster shell powder, 10-30 parts of a shell powder, 10-15 parts of a dried shrimp powder, 8-15 parts of a crab shell powder, 18-25 parts of pulverized algae, 5-10 parts of magnesium hydroxide, 0.1-0.5 part of chitosan, 10-40 parts of cane molasses combustion residue and 0.1-0.5 part of auxin. The cane molasses combustion residue is boiler combustion residue from alcohol factory in utilization of boiler plant use as concentrated waste molasses as energy source. The soil conditioner can effectively improve soil compaction and barrenness, reduce or prevent crop physiological diseases, and meet the nutritional needs of the crops.

The invention discloses a powder curing agent for expanded perlite thermal insulation plates, and a preparation method thereof, wherein the powder curing agent comprises the following raw materials byweight: 50-60 parts of power generation chimney ash, 3-8 parts of industrial aluminum sulfate, 5-10 parts of active silica, 25-35 parts of cement clinker powder, 8-12 parts of fluorite powder, and 0.5-1 part of a retarder. According to the present invention, the powder curing agent is prepared from the power generation chimney ash, the industrial aluminum sulfate, the active silica, the cement clinker powder, the fluorite powder and the retarder so as to achieve the reutilization of the industrial and mining waste materials; and the prepared powder curing agent has the rapid setting propertyof gypsum and the high strength of cement, has low-alkalinity so as to significantly reduce the alkali accumulation and peeling phenomena of the thermal insulation plate, further can eliminate radioactive materials, and can flexibly control the molding time during the molding.

The invention discloses a special high-performance additive for underwater masonry mortar. The special high-performance additive is composed of, by weight, 2-5 parts of a thickening agent, 0.5-1 part of super plasticizer, 5-8 parts of a thixotropic agent, 5-8 parts of special cement, 12-15 parts of a set controlling agent and 5-8 parts of an early strength agent. In the special high-performance additive for the underwater masonry mortar, the thickening agent can improve the adhesiveness of a mixed product, and therefore the underwater non-disperse mortar is endowed with the properties of dispersing and separating resistance. The super plasticizer can improve the fluidity and workability of the mixed product, and therefore the material is endowed with good self-leveling and self-compacting properties. The frequently-used super plasticizer mainly includes sulfonated resin or sulfonate, and therefore the material has the properties of underwater dispersing and separating resistance. Through the combined action of the doped special cement and the set controlling agent, the material is endowed with early strength and rapid hardening.

The invention discloses a method for producing jujube with chitin, which belongs to the field of fruit tree planting. Chitin organic base fertilizer and chitin leaf-sprayed fertilizer are simultaneously applied in the method. The application of chitin organic base fertilizer includes: firstly, applying chitin organic base fertilizer accounting for one third to two thirds of annual base fertilizerafter leaves fall; secondly, applying chitin organic base fertilizer accounting for one sixth to one third of the annual base fertilizer before flowering in the next year; and thirdly, applying the chitin organic base fertilizer accounting for one sixth to one third of the annual base fertilizer in the fruit expanding stage 70 days after the secondary fertilizer application. The method has the advantages that produced jujube is environment-friendly and pollution-free, yield of the jujube is increased, and quality of the jujube is improved.

The invention relates to an efficient plukenetia volubilisLinneo cultivation method. The method comprises the specific steps of conducting soil preparation and making preparations for ploughing and sowing, conducting stationing and hole digging, applying a base fertilizer, conducting nursery stock filed planting and earthing, putting up climbing frames, inserting climbing and guiding rods, and conducting management and protection. The base fertilizer is prepared through the following steps of firstly pulverizing straw, then uniformly mixing bacillus natto, pulverized straw and animal dung according to the weight ratio of 1:300-500:500-800, and afterwards conducting stack resetting, adding water to control the water moisture of a hybrid pile to be 60-70%, turning the pipe to control the fermentation temperature to be 50-65 DEG C till the animal dung and the straw are fermented to be thoroughly decomposed. In the step of conducting management and protection, specifically-made organic medicine fertilizer is adopted to conduct nutrition supplement and plant disease and insect control, and the specifically-made organic medicine fertilizer includes components of farmyard manure, polyglutamic acid, beauveria bassiana and the like. According to the efficient plukenetia volubilisLinneo cultivation method, the water content and nutrient needed by the plukenetia volubilisLinneo can be well maintained, the occurrence of plant disease and insects can be effectively prevented and controlled, the soil problem is improved, increasing of both yield and income and improvement of the product quality are assured.