176results about How to "Strong frost resistance" patented technology

The invention relates to gold tail mine concrete block and its productive technique, which belongs to wall material for building and productive technical field. Its characteristics is that the main raw material for making concrete block includes slag, cement, burnt lime, aluminum powder and water, and their mess ratio is: slag 60~70%, cement-6~10%, burnt lime-20~30% aluminum powder -0.01~0.05% and the water content can be changed according to the requirement of gold tail slime density. The invention can reach the purposes of environmental protection, energy saving, using the waste, increasing the building's quality and assuring people's health, it can use waste slag completely, with good resistance to coldness and without radioactive harm, can be compound with mortar so that solve the problem of wall surface falling down.

The present invention relates to food, and is especially glutinous rice cake and its making process. The glutinous rice cake consists of glutinous rice layer(s) in 60-70 weight portions, sugar floss layer(s) in 10-20 weight portions, and stuffing layer(s) in 10-30 weight portions. The glutinous rice cake has most modified starch to replace glutinous rice powder, maltose oligomer to replace granulated sugar and stuffing, and is sweet, fine, elastic, moderately soft and good in chewing performance. It may be produced into different kinds of different tastes.

The invention discloses a preparation method of a water permeable brick. The preparation method comprises the steps: (1) crushing aggregates; (2) sieving the crushed aggregates by using sieves with different pore diameters to obtain particles with different particle sizes; (3) proportioning the sieved aggregate particles according to a bottom material formula, adding a bonding agent, and carryingout uniform stirring to obtain a bottom material mixture; proportioning the sieved aggregate particles according to a surface material formula, and adding a bonding agent and pigment to obtain a surface material mixture, wherein the bonding agent comprises a bonding base material and liquid glue; (4) respectively mixing and stirring the bottom material mixture and the surface material mixture; (5)distributing the stirred surface material mixture and bottom material mixture twice, and carrying out compression molding to obtain a green body; and (6) firing the green body in a kiln to obtain a finished product. The water permeable brick prepared by using the preparation method is high in strength, strong in freezing resistance and excellent in water permeability; and the preparation method is few and simple in process and capable of reducing the cost.

The invention provides a stress resistance ERF transcription factor gene derived from Brassica napus, a preparation method and usage thereof. The Brassica napus stress resistance ERF transcription factor gene is BnaERFB1-2-Hy15, the base sequence thereof is shown as SEQ ID No1. In the invention, the gene sequence of Brassica napus stress resistance ERF transcription factor is cloned from Brassica napus seedling by polymerase amplification technology, the obtained ERF transcription factor gene can be used in plant transformation to improve stress resistance of plants.

The invention discloses artificial Roman travertine and a preparation method thereof. The artificial Roman travertine is composed of the following components in parts by weight: 20-50 parts of cement,40-70 parts of sand, 2-5 parts of stone flour, 2-10 parts of silica fume, 0.2-1 part of an early strength agent, 0.1-0.5 part of a retarder, 0.2-0.5 part of latex powder, 0.1-1 part of a water reducer, 0.1-0.5 part of a defoaming agent and 0.2-2 parts of fibers and iron oxide pigment. All the components are added into a high-speed dispersing machine to be uniformly stirred, then the stirred mixture is poured into a corresponding mold, vacuum vibration is carried out on the mold, and the mold is placed into a curing box, curing is carried out under a constant-temperature and constant-humiditycondition for 10-48 hours, then demolding can be carried out, natural curing is carried out for 3-10 days after the demolding, and cutting is carried out, so that artificial Roman travertine is obtained. According to the invention, the natural effect of stone is improved, colors and patterns are controllable, and batch production is facilitated.

The invention relates to a method for producing a concrete channel prefabricated part from mineral slag. The method is characterized in that the concrete channel prefabricated part is prepared from the following raw materials in parts by weight: 60-70 parts of fine and coarse aggregate, 10-20 parts of 42.5 sulfoaluminate cement, 5-10 parts of fly ash, 5-10 parts of slag micropowder, 1-3 parts of early-strength admixture, 1-3 parts of high efficiency water reducing agent and 0.1-0.5 part of defoaming agent. The high efficiency water reducing agent is a calcium lignosulphonate water reducing agent. The concrete channel prefabricated part has the advantages of low cost, excellent properties, stable quality, excellent compression strength, excellent compression strength, excellent freeze resistance and excellent water impermeability. The method aims to further enhance the standard construction of irrigation projects, comprehensively enhance the construction level and management and protection level of agricultural hydraulic engineering in China, increase the utilization ratio of irrigation water and implement high-efficiency utilization of water resources.

The invention discloses a natural-draught brine cooling tower. The natural-draught brine cooling tower comprises a drift eliminator, a water distribution device, a stuffing area, a lambada-shaped support, a water collecting tank, a tower casing and a brine temperature-concentration control device. The brine is heated by a waste heat source, and the hot brine is sent to the water distribution device in the tower casing through an intake and riser pipe. The hot brine is uniformly sprayed on the stuffing by the water distribution device and exchanges heat with the intake air from the lambada-shaped support at the lower part of the tower casing, and the temperature and the concentration of the brine are adjusted to enable the saturated evaporation pressure to be matched with the vapor partial pressure in the air so as to restrain the evaporation and the loss of the water, thereby achieving the purpose of saving water. After cooled, the brine enters the water collecting tank, and returns to the waster heat source via a circulation brine pump for further circulation. The hot air enters the upper part of the tower casing with drifts eliminated by the drift eliminator, and then is exhausted to the upper air. The flow of the air is promoted by the chimney effect generated by the tower casing. By using the brine as the cooling medium, in addition to the function of saving water, the invention can also cool the brine to almost the environmental temperature in winter, thereby achieving the frost prevention effect. The invention can be widely used in the power field, the chemical industry field and the metallurgy field in the water-deficient area.

The invention discloses a solar-air source combined heat pump water-free heating system with a heat storage function. The solar-air source combined heat pump water-free heating system with the heat storage function comprises a solar heat collector with the heat storage function and a heat supply system. The solar heat collector comprises a plurality of solar heat collecting pipes, an air inlet, an air outlet, a heat storage layer and a heat preservation layer, wherein the solar heat collecting pipes are distributed between the air inlet and the air outlet and connected through connectors, and an air channel is formed inside the solar heat collector. According to the heating system, after solar energy is converted into heat energy, one part of heat energy directly heats outdoor air, and the other part of heat energy is stored in a phase-change material of the heat storage layer. The heat supply system comprises an evaporator and a heat supply structure, and the evaporator and the heat supply structure communicate with each other. The air outlet of the solar heat collector communicates with the evaporator through a pipeline. Air heated by the solar heat collector and a heating medium in the evaporator are subjected to heat exchange, the heating medium evaporates when being heated, gas is converted into a heating medium of a high temperature after entering a compressor to be compressed, and heat is supplied externally through the heat supply structure.

The invention discloses a fire retardant coating, which is characterized by comprising the following materials in percentage by mass: 10-20% of cellulose ether, 10% of FEVE fluorocarbon resin, 15% of glass beads, 15-30% of pigment, 5-10% of ammonium polyphosphate, 3-8% of a curing agent, 10-30% of phenol propane epoxy resin, 4-8% of pentaerythritol, 4-8% of expanded graphite and the balance being a solvent. The product disclosed by the invention is flame-retardant or non-inflammable, so that a protected substrate is kept from direct contact with air, thus delaying firing and combustion speed of an object; and besides the performance of being flame-retardant or non-inflammable, the fire retardant coating additionally has a relatively low heat conductivity coefficient, and can delay transmission of flame temperature to the protected substrate.

The invention provides a plate spliced pervious roadbed made by utilizing waste plastics. The waste plastics comprise propylene, polyethylene, polypropylene, polyvinyl chloride and the like. Accordingto the current market conditions, the polyethylene plastics account for 50% of the waste plastics and belong to thermoplastic resin polymers. Therefore, the thermoplastic waste plastic products can be selected to produce and make the plate spliced pervious roadbed. Bulges and grooves of multiple shapes are formed in the left and right sides of the pervious roadbed plate, so that two adjacent pervious roadbed plates are inserted together. Drill holes through which steel strands penetrate are formed in the upper and lower sides, and the pavement can be tight and stable when the steel strands are connected together. A plurality of bulges are arranged on one side, which is close to the pavement, of the roadbed plates and can be matched with the plate spliced pavement, so that the bulges on the roadbed blocks are inserted into the grooves in the pavement panel so as to achieve an excellent stabilizing effect.

The invention relates to a straight-way solar energy heat exchange heat collector using solar energy as a heat source and belongs to the technical field of medium and high temperature solar energy utilization. The straight-way solar energy heat exchange heat collector comprises a straight-way transparent tube, a multi-curved face metal heat exchange tube, heat exchange tube end enclosures, a metal expansion joint, adsorbent storage rings, concave spacing sealing rings, metal snap rings, a working medium channel pipe, metal cover plates, sealing fixed plates, card type shield covers and vacuum connectors, wherein the two ends of the multi-curved face metal heat exchange tube are welded and fixed with the heat exchange tube end enclosures; the working medium channel pipe is connected with the heat exchange tube end enclosures; the multi-curved face metal heat exchange tube is provided with the metal expansion joint; the working medium channel pipe passes through the center of the metal cover plate to form an multi-curved face metal heat exchange tube component which is integrally sleeved in the straight-way transparent tube and the two ends of which are sequentially provided with the adsorbent storage rings, the concave spacing sealing rings and the metal snap rings; the sealing fixed plates seal and fix the metal snap rings and the metal cover plates; the two ends of the straight-way transparent tube are provided with the card type shield covers; and the vacuum connectors are fixed on the card type shield covers.

The invention relates to a gene descended from insect antifreeze peptide and a preparation method and application thereof. The nucleotide sequence of the gene is shown in SEQ ID NO 1, the amino acid sequence of the protein encoded by the gene is shown in SEQ ID NO 2; and the gene is the CFAFP3I gene which is prepared by modifying the CFAFP3I gene of insect antifreeze peptide according to the preferred codons of plant through the gene synthesis method. When the gene is used to transform Arabidopsis thaliana, the anti-freezing capability of the transgenic Arabidopsis thaliana can be increased. The gene of the invention plays an extremely important role in the cultivation of the anti-freezing plant variety and has important theoretical significance and practical significance.

The invention discloses an iron tailings baking-free brick and a preparation method thereof. The iron tailings baking-free brick is prepared from the following main raw materials in percentage by mass: 50 to 70 percent of iron tailings, 5 to 8 percent of iron ore waste stone nitrate, 5 to 8 percent of steel slag, 15 to 20 percent of cement, 2 to 5 percent of gypsum, 1 to 3 percent of adhesive, 3to 5 percent of straw and 10 to 15 percent of water. The preparation method comprises the following steps: carrying out primary machining on the raw materials, burdening in proportions after meeting abrick-making requirement, then uniformly mixing and stirring, carrying out compression molding under the molding pressure of 20 to 25 MPa, and naturally curing for 21 days at normal temperature, thuspreparing the iron tailings baking-free brick. According to the iron tailings baking-free brick disclosed by the invention, the problems that an iron tailings baking-free brick prepared in an original mode is easy to crack, easy to shrink and low in strength can be favorably improved, the strength can be up to MU20 grade or above, and the iron tailings baking-free brick has the characteristics ofhigh rate of qualified products, high strength, no need of autoclaved curing, low brick-making cost and the like, is a novel building material for partially replacing sintered clay bricks, is beneficial for increasing the resource utilization rate, reducing land occupation of tailings and improving the environment, and has good economic benefit and good social benefit.

The invention relates to a method for producing a prefabricated member of a concrete ditch by using coal gangue. The method is characterized in that the prefabricated member of the concrete ditch is prepared from the following raw materials in parts by weight: 50-60 parts of coarse and fine aggregates, 5-10 parts of coal gangue powder, 10-15 parts of 42.5 sulfoaluminate cement, 2-5 parts of early strength agent, 2-5 parts of thickening and reinforcing agent, 1-3 parts of efficient water reducing agent and 0.1-0.5 part of antifoamer, wherein the efficient water reducing agent is a calcium lignosulfonate water reducing agent. According to the method, the prefabricated member of the concrete ditch is low in cost, excellent in performance and stable in quality and has excellent compressive strength and antifreeze and impervious performance; and the standardized construction of farmland water conservancy is further strengthened, the construction level and management level of farmland water conservancy projects in China are comprehensively increased, the utilization ratio of irrigation water is increased, and the efficient utilization of water resources is achieved.