201results about How to "Increase gas content" patented technology

The invention relates to a method for preparing bearing steel. The method comprises the following steps of smelting, and alloying; carrying out continuous casting; rolling; carrying out slow cooling, and the like. The chemical components in the bearing steel are controlled in percentage by weight as follows: 0.95%-1.05% of C, 0.20%-0.30% of Si, 0.30%-0.35% of Mn, 0.02%-0.05% of Mo, 1.45%-1.48% of Cr, 0.015%-0.035% of AlS, less than or equal to 0.05% of Cu, less than or equal to 0.025% of S, less than or equal to 0.025% of P, less than or equal to 0.05% of Ni, less than or equal to 12*10<-6> of [O], less than or equal to 2*10<-6> of [H] and the balance of Fe and inevitable impurities. According to the bearing steel produced through the method disclosed by the invention, the total oxygen content of a steel product can be stably controlled below 8 ppm, non-metallic inclusions are low in content and uniformly distributed, and good casting blank structure homogeneity, steel quality stability and anti-fatigue property and casting blank segregation grade reduction are achieved.

The invention provides a casting method of aluminum alloys. The method comprises four steps of smelting, refining, moulding and pouring. The casting method is characterized by adding specific additive in the casting process and strictly controlling standing time and casting temperature after refining of aluminum pad to enhance purity of aluminum melt and product quality of the aluminum alloys. The tensile strength, pinhole and the like of the castings which are made by the method are obviously enhanced, and defective index of large aluminum alloy castings made by the method is obviously reduced, and the method is applicable to casting of large aluminum castings with high requirements.

The invention discloses a method for preparing a hydrogen-rich synthesis gas via biomass pyrolysis, comprising the following steps of: by taking biomass particles having a particle size of not greater than 2 mm as raw materials, conveying the biomass particles in a fluidized bed reactor in which the N2 flow of a fluidized bed is 1.0-1.5m<3> / h and the pressure is 0.01-0.08 MPa via a spiral feeder at a speed of 0.005-0.01 t / h; performing pyrolysis at the temperature of 450-550 DEG C; performing catalytic reforming on the surface of a catalyst by the highly-hot vapour generated by the pyrolysis reaction through a microwave catalytic bed; and further transforming biological oil vapour to the synthesis gas, and charging a small amount of oxygen in the microwave catalytic bed to inhibit coking on the surface of the catalyst. According to the invention, energy consumption is reduced, and the transformation rates of hydrogen and biomass are increased by performing a catalytic reforming reaction on a microwave stationary bed via the biological oil vapour after the first-stage fluidized bed pyrolysis.

The present invention discloses an airlift reactor assembly with a helical sieve plate, comprising a reaction tank, wherein a draft tube and a gas sparger are assembled in the reaction tank, the gas sparger is arranged just below an riser section of the draft tube, a helical sieve plate is arranged in the riser section of the draft tube, and a body of the helical sieve plate is helical upwards to guide a part of two / three-phase flow in the riser section, and the body of the helical sieve plate is provided with a plurality of sieve meshes to guide the remaining two / three-phase go through the helical sieve plate in the riser section and to break bubbles. The present invention gives consideration to both macroscopic mixing and microscopic mixing processes. In addition to driving liquid to circularly flow by using ejected gas, the helical sieve plate can be used for breaking large bubbles into small bubbles thereby effectively preventing the bubbles from coalescing, increasing gas holdup and increasing a volumetric oxygen transfer coefficient.

The invention discloses an early strength type water reducing agent for precast concrete. The early strength type water reducing agent comprises the following components by weight percent: 5.00-6.00% of polycarboxylic acid water reducing agent, 0.50-2.00% of inorganic lithium salt, 1.00-5.00% of inorganic sodium salt, 0.00-10.00% of inorganic calcium salt, 0.01-0.30% of deformer and the balance of filling material. The early strength type water reducing agent has the characteristics that the doped amount is low, the air bleeding is low, the water reduction is high, slump is well maintained, and the early strength is rapidly increased; and by utilizing the early strength type water reducing agent, the steam heating and maintenance of the precast concrete are shortened or avoided, thereby reducing the production cost of the precast concrete.

The invention discloses a new road regenerating cement concrete and preparing method, which comprises the following parts: 15%-37% regenerating rough aggregate, 15%- 37% natural rough aggregate, 16%-18% cement, 22%-24% sand, 8%-10% water (mixing water and additional water), 0.6%-1.2% steel fiber corresponding to the sum of component bulk and 0.1%-0.5% high-effect water reducer corresponding to cement quantity. The invention overcomes low bending-proof strength, which improves cracking-proof flexibility and impaction-proof ability greatly.

A multifunctional anti-cracking water-proofing agent for improving the flowability and slump of concrete, increasing the strength, impervious performance and compactness of solidified concrete, and decreasing the consumption of water is prepared proportionally from high-concentration naphthelene-series efficient water reducing agent, sodium laurylsulfate, sodium gluconate, hydroxypropyl methylcellulose, vinyl acetate-ethene copolymer emulsion and water through sequential mixing and stirring.

The present invention relates to the technical field of hollow sphere preparation, particularly to a method for preparing hollow spheres through a microwave-assisted aerosol. The method comprises: A, dispersing a hollow sphere shell precursor in a polar solvent, adding an ammonium salt to form a colloidal solution or true solution, ie., a precursor solution; B, carrying out atomization on the precursor solution prepared in the step A to form aerosol liquid droplets; and C, introducing the aerosol liquid droplets prepared in the step B into a microwave generator to carry out microwave irradiation to obtain the hollow sphere powder particles. According to the present invention, the hollow sphere powder preparation method has characteristics of short production period, simple operation, no pollution, easy scale-up and easy promotion application, wherein the microstructure of the prepared hollow sphere powder is not easily damaged.

The invention discloses a comprehensive prevention and control technology of a corn waterlogging disaster, wherein soil ridging or compartment ridging regulation and control are utilized. The comprehensive prevention and control technology comprises the following steps: sowing in a wide and narrow row spacing manner during corn sowing, carrying out intertillage ridging or ditching during the five-leaf stage of corn, ditching in wide rows of corn and ridging in narrow rods of corn, or ditching in wide rows on the two sides of a compartment consisting of four or six rows, additionally applying nitrogen-oxygen mixed fertilizer instantly after the corn waterlogging disaster occurs, and spraying spermidine chemical modifier on leaf surfaces at the same time, wherein spraying is carried out once in the morning and night for 2-3 days continuously; other steps are the same as that during normal management, corn is harvested until bracts of corn clusters are dried up, corn grain milk lines disappear, and a black layer appears, namely when grains are completely and physiologically matured. According to the comprehensive prevention and control technology, through comprehensive precontrol advantages of prevention in advance and remedy after the disaster, the root oxygen deficiency after waterlogging can be effectively reduced and retarded, accumulated toxic effect of hazardous substances of soil is reduced, and the root growth and absorption capacity is strengthened, so that the symplastic growth of overground part and root system is promoted, and the yield is improved.

The present invention provides a block polyether, an air entrained type polycarboxylate water reducing agent prepared by the block polyether and a preparation method thereof, the air entrained type polycarboxylate water reducing agent not only has excellent work performance, also has the function of improving the air content in concrete, can not only avoid the a series of compatibility problems caused by compounding with an initiator, also can replace a calcium lignosulphonate water reducer and can ensure the concrete strength and anti cracking performance. In addition, due to the polyether special block structure, the air entrained type polycarboxylate water reducing agent has surface activity different from that of unsaturated polyglycol ether, and can be soluble in an aqueous solution so as to avoid the occurrence of delamination and other situations.

The invention provides a composite concrete air entraining agent, and a preparation method and application thereof. The invention is characterized in that the composite concrete air entraining agent is composed of a sulfonate Gemini surfactant, a betaine amphoteric surfactant, an alkanolamide nonionic surfactant and water; and the solid content of the composite concrete air entraining agent is 20+ / -1%. The composite concrete air entraining agent has excellent air-entraining effect in concrete; and sufficient 20-150-mu m stable small bubbles can be introduced to improve the workability of the concrete (mortar), reduce the bleeding rate and sedimentation and avoid lowering the later strength of the concrete on the premise of enhancing the air content.

The invention discloses a low-viscosity and easy-pumping ultrahigh performance concrete and a preparation method thereof. The concrete comprises, by mass, 300-500 parts of cement, 100-200 parts of silica fume, 300-600 parts of an admixture, 400-800 parts of sands, 300-700 parts of crushed stones, 80-240 parts of fibers, 5-30 parts of a thixotropic enhancer, 15-30 parts of a water reducer, 0.1-0.3part of an antifoaming agent and 140-180 parts of water. The low-viscosity and easy-pumping ultrahigh performance concrete of the invention has a high fluidity and a low viscosity, the pumping resistance is only 0.015-0.025 MPa / m, and the compressive strength after 28 d standard curing is 180 MPa or above. In addition, the low-viscosity and easy-pumping ultrahigh performance concrete of the present invention has a typical low cement content, so the shrinkage of the ultrahigh performance concrete is significantly reduced, the use amount of the cement is significantly reduced, and the environmental pollution is reduced.

The invention discloses an apparatus and a method for extrusion moulding of supercritical-fluid micropore plastic. The apparatus comprises an electric cabinet, a vibration exciter, a power unit, a plasticizing mixing unit, a supercritical fluid conveying unit and a moulding unit; the vibration exciter, the power unit, the plasticizing mixing unit and the moulding unit are in successive connection; the supercritical fluid conveying unit is arranged on the plasticizing mixing unit; and the vibration exciter, the power unit and the plasticizing mixing unit are all independently connected with the electric cabinet. The method comprises that the power unit drives a screw to rotate, the vibration exciter drives the screw to make periodic vibration at the axial direction; a material is plasticized and fused under the dual effects of shear force field and vibration force field of the screw; at the same time, the supercritical fluid conveying unit injects a supercritical fluid into a material barrel, and thus the supercritical fluid and the fused material rapidly form a single system of the supercritical fluid and a polymer melt under the dual force fields; and the single system finally enters the moulding unit for foaming fixing. The plasticizing mixing speed is fast, and the mixing effect of the supercritical fluid and the polymer melt is good.

The invention discloses a waterproof sealing system for a high-speed railway bridge deck in a severe cold area and a construction method of waterproof sealing system. The waterproof sealing system comprises a protecting wall outside cable duct waterproof system and a between-cable waterproof system and is characterized in that the protecting wall outside cable duct waterproof system comprises a waterproof coating layer and a fiber reinforced concrete protecting layer; the between-cable waterproof system comprises a waterproof coil layer and a fiber reinforced concrete protecting layer. The waterproof sealing system has the advantages that the waterproof coil and C40 fine-stone fiber reinforced concrete are composited to serve as the structure waterproof sealing layer, and the crack resistance and freezing resistance of the concrete are increased; a self-made paving machine is used to perform coil paving to guarantee coil adhering density and increase the effect; a vibration platform isused to perform deck ultrathin glass fiber waterproof concrete pouring, a drainage slope is formed in one step, and cracking after construction is prevented effectively.

The invention relates to frost-resistant concrete and a preparation method thereof, and belongs to the technical field of concrete. The adopted technical scheme is that the frost-resistant concrete isprepared from the following components in parts by weight: 295 to 320 parts of cement, 945 to 970 parts of gravels, 880 to 915 parts of modified pottery sand, 165 to 180 parts of silicon micro powder, 225 to 245 parts of coal ash, 75 to 90 parts of slag powder, 0.3 to 1.5 parts of an air entraining agent, 9 to 14.5 parts of a water reducing agent and 165 to 195 parts of water. The formula of thefrost-resistant concrete is simple, high in frost-resistant durability and suitable for being applied to various engineering projects in alpine areas.

The invention discloses a program and method for controlling the pressure of nitrogen injection production increase coal bed gas. The method comprises the steps: enabling the response of a coal bed gas storage layer to the nitrogen injection pressure and rate of a nitrogen injection well and the changes of well mouth pressure, gas output and nitrogen volume percentage composition of a production well to be fed back to the nitrogen injection well, and adjusting the nitrogen injection pressure and rate; holding the pressure of the coal bed gas storage layer in necessity, and even carrying out conversion and employing a low-pressure oscillation pressurization mode; converting the coal bed gas storage layer in necessity and employing a high-pressure oscillation pressurization mode. Only if the coal bed has enough gas, are the program and method suitable for any coal bed. The method provided by the invention guarantees that the injected nitrogen enters into the coal bed, passes through all coal bed between the nitrogen injection well and the production well, enables the nitrogen to enter into miniature gaps of the coal bed, prompts adsorbed-state coal bed gas to be desorbed, drives the desorbed free-state coal bed gas to arrive at the production well, and achieves the purpose of coal bed gas yield increase.

The invention aims at providing a method for preparing alloy K414 from return scraps of cast high-temperature alloy K414. The method is characterized in that all return scraps are adopted to produce the alloy K414, and special pretreatment is carried out on surfaces of the return scraps so as to remove all impurities remaining on the surfaces; and then the return scraps are subjected to two-time high-temperature refining treatment, and low-frequency stirring is adopted during refining so as to further remove low-melting-point impurities and oxides from materials. Filter screens of two-level different pore diameters are adopted to block slag during pouring, so that the purity of the alloy is further improved. According to the method, return scrap resources are sufficiently utilized, a 100% return scrap utilization scheme is adopted, a vacuum induction melting method is used for producing return scrap alloy, and the material utilization ratio is increased on the premise that the quality of the alloy is guaranteed, so that the production cost can be effectively reduced.

The invention provides a mortar reinforcing agent. The mortar reinforcing agent is prepared from the following raw materials in parts by weight: 2 to 10 parts of naphthalene water reducer, 0 to 50 parts of polycarboxylate superplasticizer, 10 to 20 parts of hydroxypropyl methyl cellulose, 10 to 40 parts of calcium silicate powder, 10 to 20 parts of HQS, 5 to 10 parts of calcium chloride, 0 to 50 parts of starch ether, 1 to 10 parts of polyacrylamide, 1 to 10 parts of polyvinyl alcohol powder, 1 to 5 parts of silane hydrophobic agent, 1 to 10 parts of cement reinforcing agent, 1 to 5 parts of mortar plasticizer, and 0 to 50 parts of calcium formate. By adopting the cement mortar reinforcing agent, the physical mechanical performance of mortar can be improved, and the water retaining performance and tensile adhesive strength of the mortar can be improved; since the water retaining rate is higher than the ordinary mortar, the water of the mortar is unlikely to absorb by the aerated concrete, the interface cement of the aerated concrete can be sufficiently hydrated, and the adhesive strength of the mortar and the aerated concrete can be improved, so that the cracking, bubbling and stripping problem of the mortar on the smeared surface of an aerated concrete building block can be effectively solved.

The invention discloses a foundation construction method. The foundation construction method comprises the following steps that multiple cement piles are driven into the ground, wherein the tops of the cement piles are provided with ribs extending out of the interiors; multiple rebars are welded to one another and connected to form a rectangular reinforcement cage; the reinforcement cage is hoisted to the tops of the multiple cement piles, and the ribs are welded to the reinforcement cage; wood panels are arranged at the periphery of the reinforcement cage in a surrounding manner, concrete ispoured into a chamber defined by the wood panels, pouring is stopped when the three seventh height of the reinforcement cage is submerged by the concrete, waiting lasts for three hours, and then, pouring of compound type concrete is conducted, so that finally, the top height of the compound type concrete exceeds the upper surface of the reinforcement cage by two centimeters; and after the compoundtype concrete is dry, the peripheral wood panels are removed, wherein raw materials of the compound type concrete comprise cement, coal ash, sodium methyl silicate, sodium ethyl silicate, MS resin and melamine. When a foundation is constructed, waterproofing treatment is conducted; efficiency is high; the problem that waterproofing construction is conducted in the subsequent decoration process isavoided; and cost is lowered.

The invention discloses a method for making gases by using carbon dioxide to replace or partially replace steam. In the method, the heat supply is provided by air blowing, and carbon dioxide is used as a gasificaton agent; gases with rich carbon monoxide are made by a prior fixed bed gasifier or YH fine-coal briquetting continuous gasifier; carbon dioxide can be supplied from the vent gases with rich carbon dioxide in any work section of the synthetic ammonia production; a carbon dioxide buffer tank and a steam buffer tank adopted in the method can be connected in parallel or in series. The method of the invention fully utilizes available resources, saves energy, reduces energy consumption and simultaneously improves the utilization efficiency of steam, thereby lowering steam costs.

The invention relates to a high frost resistance roller compacted concrete mortar wrapped stone mixing method which is suitable for the field of construction of high frost resistance roller compacted concrete in a cold region. The high frost resistance roller compacted concrete mortar wrapped stone mixing method comprises the steps of: stirring by sections by adopting a forced stirring machine, firstly putting a binding material and a sand material during stirring, adding an additive water solution for stirring for 2min-3min, and then adding stone for stirring for 1.5min-3.0min. The method provided by the invention remarkably increases the gas content of roller compacted concrete, can be widely applied to a normal concrete mixing process, and has wide popularization and application values.

The invention discloses a bioreactor for high-density large-scale animal cell culture and application thereof, and belongs to the field of biological cell culture. According to the bioreactor for high-density large-scale animal cell culture, sufficient oxygen is provided in a low shear environment to meet the need of cell growth by using multi-stage microporous aeration combined with slight axial agitation or circulation, and also attenuate the dissolved oxygen gradient within the reactor. At the same time, a wire mesh demister is mounted on the top of the reactor, and external circulation spray is combined to eliminate physical damage of the cells caused by bubble breakage. The bioreactor for high-density large-scale animal cell culture has the following beneficial effects: a demisting device is arranged on the liquid layer of the reactor so that bubbles do not break on the surface of the liquid; and in addition, a gas permeable membrane is used to selectively remove dissolved carbon dioxide in the reactor to eliminate inhibition of the carbon dioxide on cell growth.

The invention discloses a casting process for a high-temperature water-pressure-resisting combined flange. The cast high-temperature wear-resisting combined flange mainly comprises a flange body. The flange body is composed of a first flange plate and a second flange plate. The shape and the size of the second flange plate are the same as those of the first flange plate. The first flange plate and the second flange plate are each of a saddle-shaped structure. Threaded holes and through holes are evenly distributed in the first flange plate and distributed at intervals. The two ends of the first flange plate extend outwards to form fixing edges. Fixing holes are formed in the fixing edges. At least two lug plates are arranged on the edge of the outer side of the first flange plate. The first flange plate and the second flange plate are connected together in a fastened manner through bolts after butting the fixing holes in the fixing edges, and the first flange plate and the second flange plate are connected in the fastened manner to form a mounting hole. The casting process is simple and easy to implement. The cast combined flange is simple in structure and has good high-temperature water-pressure-resisting performance, the service life of the flange is prolonged, and cost is lowered.

The invention relates to a fluid ice preparation method, a preparation equipment and a fluidization crystallizer; the preparation method is as follows: firstly, carrying out a first-stage cooling on ice making solution, cooling below 0 DEG C and above minus 15 DEG C; and then injecting diluent into ice making solution to obtain ice making solution with reduced concentration; and finally carrying out a second-stage cooling on reduced ice making solution and continuously cooling to produce fluid ice. A fluid ice crystallization passage of the fluidization crystallizer of the preparation equipment of fluid ice is divided into a first refrigeration section and a second refrigeration section in the flow direction; a first stage evaporator and a second evaporate are respectively and correspondingly arranged at outer sides of the two refrigeration sections; one end of the fluid ice crystallization passage close to the first refrigeration section is provided with an ice making solution inlet and the other end is provided with a fluid ice outlet; a diluent inlet is arranged between the two refrigeration sections. The invention carries out two-stage cooling on ice making solution and reducesthe concentration of ice making solution in the ice making process, thus increasing the utilization rate of cooling capacity and refrigeration efficiency of a refrigeration system.

The invention provides a concrete air-entraining agent molecule with a polyether hydrophilic chain segment and an aliphatic hydrocarbon hydrophobic chain segment modified through an alkyloxysilane group. The concrete air-entraining agent molecule has a structure shown in the formula (I). The invention also provides a preparation method of the compound and a use of the compound as the concrete air-entraining agent. The compound has a three-block structure, good surface activity and molecule reaction activity. The concrete air-entraining agent has excellent performances: 1, good air entraining effects at a low doping amount and reasonable size distribution of entrained bubbles, 2, good bubble stabilization effects and a high gas content level, and 3, small influence on concrete strength.

The invention relates to a slurry-rich concrete additive and a preparation method thereof. The slurry-rich concrete additive is prepared by compounding the following components in percentage by mass: (60-100) per thousand of quick adsorption and dispersion water reducing agent, (150-250) per thousand of air entraining water reducing agent, (5-30) per thousand of water retaining agent, (0.5-2) per thousand of air entraining agent, and the balance of deionized water . The quick adsorption and dispersion water reducing agent is synthesized by copolymerizing allyl polyethylene glycol monomethyl ether, acrylic acid and sodium p-styrenesulfonate serving as raw materials. The air entraining water reducing agent is synthesized by taking a polyether macromonomer, acrylic acid, methacrylic acid, methyl acrylate and 2-acrylamide-2-methylpropanesulfonic acid as raw materials and adding an initiator and a chain transfer agent for copolymerization. The invention also provides a preparation method of the slurry-rich concrete additive. The volume of concrete slurry is increased, and the mortar can be applied to concrete which seriously affects construction due to the fact that the content of powder in sand is seriously insufficient.

The invention discloses an aluminum alloy conductor flexible cable and a preparation method thereof, and belongs to the field of flexible cables. The aluminum alloy conductor flexible cable comprisesone or more cabling sheath layers, a cabling and belting layer and conductor insulating wire cores from outside to inside in sequence, wherein the number of the conductor insulating wire cores is oneor more, cabling fillers are filled between the conductor insulating wire cores, and each conductor insulating wire core sequentially comprises a tensile strand, an aluminum alloy conductor and a wirecore insulating layer from inside to outside. The aluminum alloy conductor flexible cable not only has high conductivity, but further has excellent tensile strength and compressive creep resistance,the possibility of replacing copper with aluminum in the flexible cable is realized, the use cost of the flexible cable is reduced, and the wear resistance and the service life of the cable are improved due to light weight and excellent characteristics.

The invention relates to the field of a repairing agents, and discloses a deicing salt-resisting cement-based channel repairing agent. The repairing agent is prepared fromconsists of the following components: potassium dihydrogen phosphate, magnesium oxide, borax, calcium carbonate, coal ash, silica fume, polyacrylamide, air entraining agent, awater reducing agent, fine aggregates, coarse aggregates and water. The invention also discloses a preparation method of the deicing salt-resisting cement-based channel repairing agent. The deicing salt-resisting cement-based channel repairing agent is short in time of coagulation, high in adhesive strength, excellent in anti-permeability and deicing salt corrosion resistance, and suitable for repairing road side channels, drainage channels and the like damaged by the stripping erosion of the deicing salt.