45results about How to "Suitable porosity" patented technology

The invention discloses a method for preparing human-like collagen haemostatic sponge in scale, which comprises the following steps: dissolving human-like collagen into 1.0 to 2.0 percent solution; dissolving chitosan into 0.5 to 1.0 percent solution by dilute acid; mixing the two solutions evenly, adding glycerin and/or sorbitol into the solution, mixing, stirring and filtering the solution, and then defoaming the solution in vacuum; injecting the mixed solution into a die, pre-freezing the mixed solution at a temperature of between 40 DEG C below zero and 80 DEG C below zero, cross-linking the mixed solution by using 0.1 to 1.0 percent glutaraldehyde solution after freezing and drying, washing the cross-linked product for several times by using distilled water after the cross-linking is finished and vacuum-freezing and drying the washed product again, and then sterilizing the product by Co-60 to obtain a finished product of the human-like collagen haemostatic sponge. Compared with the conventional haemostatic materials broadly applied in clinic, the prepared haemostatic sponge has good mechanical property and excellent biocompatibility, thoroughly stops inevitable virus hidden trouble of animal collagen haemostatic materials, and ensures the safety of the haemostatic material in clinical usage.

The invention relates to a tungsten matrix for a hot cathode and a preparing method of the tungsten matrix, and belongs to the microwave vacuum electronic technology and the refractory metal powder metallurgical field. The tungsten matrix for the hot cathode is pure tungsten or tungsten iridium or tungsten osmium or tungsten rhenium alloy, the overall porosity is 13% to 22%, the average pore sizeis 0.2 to 1.5 micrometers, the percentage of close area is smaller than 0.5%, and the framework tensile strength is 150 to 300 MPa. The preparing method comprises the steps that wet classified narrowgranularity and medium-fine particle tungsten or tungsten alloy powder serves as a raw material, and vacuum degassing, screening, isostatic cool pressing, composite sintering, hot isostatic pressure repressing and re-sintering modifying, fully compacted copperizing, final machining and high-temperature vacuum copper removal are executed; the tungsten matrix for the hot cathode is proper in porosity, small in hole diameter, narrow in distribution, extremely low in percentage of close area, high in framework strength, and capable of being used for making low-temperature large current, high reliability and long service life cathodes. The preparing method is high in process controllability, good in product consistency and capable of easily achieving large-scale production.

The invention relates to alkaline stemming which is prepared from the following raw materials: 25%-50% of sintered magnesia, 5%-20% of dust coke, 10%-25% of magnesium-carbon reclaimed material, 1%-10% of carbon-containing resin powder, 5%-10% of silicon carbide, 5%-10% of Jiaozuo clay, 1%-5% of alpha aluminum oxide, 5%-20% of light burning magnesium powder, 5%-10% of andalusite, and stemming-dedicated resin accounting for 10%-20% of the total weight of the raw materials. The alkaline stemming provided by the invention has the advantages of good plasticity and adhesion, appropriate porosity, slight volume expansion at high temperature, good sintering property, high strength, scouring resistance, erosion resistance, easiness in tapping and environmental friendliness, and does not discharge pollutant gas in the sintering process; the molten iron scouring resistance of the alkaline material is fully played, and the alkaline stemming does not bring pollution or harmful impurities to molten iron; the harmful impurities in the molten iron can be reduced to purify the molten iron; the harmful components such as phosphorus, sulfur and silicon in the molten iron are reduced; the alkaline stemming provided by the invention has the advantages of long service life, short sintering time, high strength and easiness in tapping, reduces the maintenance cost of an iron notch and is conducive to the stable operation and stable and high yield of a blast furnace.

The invention discloses an ecological restoration method for a coal mine waste rock mountain. The method comprises the following steps of (1) reducing the slope surface of the waste rock mountain, reducing the slope to 20-30 degrees, stabilizing the slope surface, and setting a drainage system; 2) laying loess on the surface of the spontaneous combustion waste rock mountain, and compacting to isolate an air approach, so that the internal air of pontaneous combustion waste rocks is exhausted and extinguished; (3) conducting seed-spraying on the coal mine waste rock mountain slope by using a loam-like substrate spraying method, specifically, laying a metal mesh on the surface of the compacted loess, and fixing with a bolt, spraying on the subsoil of the loam-like substrate, and spraying on the surface of the loam-like substrate; (4) conducting curing management of the slope, covering a non-woven fabric, reinforcing, watering, fertilizing, conducting pest control, replanting and conducting post-monitoring. The ecological restoration method for the coal mine waste rock mountain adopts loess cover, isolates air to prevent the spontaneous combustion of the waste rocks, and adopts a loam-like soil spraying technology to conduct plant seeding to achieve ecological restoration.

The present invention relates to a ceramic filtration membrane with a porous support (1) formed by sintering aluminum oxide particles and metal oxide particles at a temperature greater than 1300° C. and less than 1500° C., comprising fine aluminum oxide particles with a particle size of less than 10 μm, and coarse aluminum oxide particles with a particle size of 20 μm-150 μm, where the fine aluminum oxide particles represent a percentage by weight. of 3%-10% with respect to the total weight of the porous support (1), the porous support (1) having a porosity greater than 28% with a pore size of 1 μm-7 μm, bending strength greater than 45 MPa and suitable chemical resistance, giving rise to ceramic filtration membranes with ceramic layers (3) having a pore size of 1 nm to 1000 nm.

The invention discloses a method for preparing a biodegradable blood vessel external scaffold material used in tissue engineering, comprising the steps as follows: using distilled water to dissolve human-like collagen to be a 1%-3% solution; using diluted acid to dissolve chitosan to be a 0.5%-1.5% solution; mixing the two solutions evenly, adding aqueous glutaric dialdehyde solution with the concentration of 20-50% according to mass percentage, mixing and stirring, and filtering followed by vacuum de-foaming; pouring the mixed solution into a tube-shaped die, cross-bonding at 4 DEG C for 1-3 days, placing the same into a refrigerator with the temperature being negative 80 DEG C for refrigerating, and then drying to obtain the blood vessel external scaffold material. Compared with the prior art, the prepared scaffold material has excellent mechanicalness, bio-compatibility, blood compatibility and immunity compatibility, is much lower in immunological rejection response, and can eradicate the potential virus hazard which can not be avoided by animal collagen, causing the security to be improved vastly.

The invention belongs to the technical field of plant growth matrices, and particularly relates to a garden type roof greening matrix and a manufacturing method thereof. The garden type roof greeningmatrix comprises an organic matter and an inorganic matter, wherein the volume percentage of the inorganic matter is 80%-85%; the volume percentage of the organic matter is 15%-20%; in the inorganic matter, the weight percentage of crushed particles with the particle size of 0.05 cm to 0.5 cm is 15-65%; and in the organic matter, the weight percentage of crushed particles with the size of 0.05 cmto 0.5 cm is 15-65%. The garden type roof greening matrix provided by the invention mainly meets the requirements of high-grade three-dimensional greening, can be intelligently managed aiming at the construction and management of gardens with multiple plant types and multi-layer structures and gardens in the air, and high roof load is required. The roof planting with dense plants and a multi-layerstructure can be met, the roof is light in weight, water and fertilizer can be preserved, roots can be easily inserted, permeable drainage is facilitated, water and oxygen can be preserved, roof plants grow reasonably, and green ecological materials are provided for ecological city construction, sponge city construction and fourth-generation residential construction in the future.

The invention provides a blast furnace gun mud added with SiAlON synthesized throughcoal ash and a preparation method of the blast furnace gun mud. The gun mud is characterized in that industrial corundum particles and fine powder, silicon carbide particles and fine powder, coke powder, clay fine powder and asphalt powder are adopted and used as the main raw materials; proper SiAlON fine powder which is synthesized by the coal ash discharged by a coal fired power plant is added; and the oil tar is used as a bonding agent. The blast furnace gun mud has the beneficial effects that: 1, the prepared gun mud is excellent in the following performances, high plasticity, high bonding performance, excellent sintering performance, proper air porosity, low high-temperature volume shrinkage, high resistance to slag-iron erosion, high flushing performance, and high open performance; 2, the industrial waste that is coal ash is used as the synthetic raw material of the adopted SiAlON material, so that the cost of the raw material is low, and as a result, the production cost of the gun mud is relatively low; 3, the industrial waste that is the coal ash is used as the raw material for synthesizing the SiAlON material, and a novel mode is also provided for comprehensively utilizing the coal ash; and 4, the blast furnace gun mud has important economic benefit and social benefit.

The invention provides a catalyst carrier, a catalyst composite filtering element as well as a preparation method and a device thereof. A fiber layer of the catalyst carrier is formed by fiber paper shaft rolls and has self support together with an auxiliary carrier with an adhesive property, and in addition, fiber paper has a good filtering property and is good in high temperature stability and low in price; in addition, on one hand, the auxiliary carrier has a fixing function on a main carrier, and the catalyst is prevented from migration or damage in the use process; on the other hand, theauxiliary carrier is also capable of loading active components, the ratio of the loaded active components is increased, and furthermore the catalysis property can be improved; furthermore, the catalyst carrier is simple in preparation process, low in process cost and material cost and excellent in filtering property and catalysis property.

The invention discloses a ball-like food processing apparatus and a meat mincing machine thereof. The ball-like food processing apparatus comprises a shell, a material feeding pushing mechanism and aball-like food molding mechanism, wherein the material feeding pushing mechanism and the ball-like food molding mechanism are arranged in the shell, the ball-like food molding mechanism is communicated to the material outlet channel of the material feeding pushing mechanism, the material feeding pushing mechanism is connected to the ball-like food molding mechanism through a drive shaft, the ball-like food molding mechanism comprises a fixing disk, a driving disk and a ball-like food molding rotation disk, the fixing disk is fixed in the shell and is provided with an ejection guide rail, the driving disk is connected to the drive shaft and is arranged on the outer side surface of a fixing seat, the ball-like food molding rotation disk is arranged between the fixing seat and the material feeding pushing mechanism, the disk surface of the ball-like food molding rotation disk is provided with a plurality of ball-like food molding units, the driving disk and the ball-like food molding rotation disk form synchronous driving connection, the ball-like food molding rotation disk drives the plurality of the ball-like food molding units to rotate, and are corresponding to the material outletchannel of the material feeding pushing mechanism one by one to complete food filling, extrusion and ball-like food production is performed by the ejection guide rail in the shell, and the produced ball-like food is pushed and discharged from the ball-like food port of the shell. According to the present invention, by matching the ball-like food processing apparatus and the meat mincing machine,the rapid ball-like food production of minced meat can be achieved.

The invention provides an organic culture medium applicable to bare place facilities of coastal mud flats. The organic culture medium comprises the following raw materials: plant wastes, organic fertilizers and rice husk carbon. The organic culture medium is prepared by flattening and crushing plant wastes by using a crushing machine, adding the organic fertilizers to adjust the ratio of carbon tonitrogen, adjusting the water content, adding microorganism composted composite bacterial agents and chitosan, uniformly stirring by using a pile turning machine, forming a conical pile, turning andmixing by using the pile turning machine every other 2-4 days, composting for 10-18 days till the mixture is brown or black brown, free of smell and soft and elastic when being held by hand and the ratio of carbon to nitrogen is reduced, and the water content is reduced, so as to obtain a composted mixture after composting is completed, and by mixing the composted mixture and the completely carbonized rich husk carbon according to a ratio. The medium is rich in raw material source, agricultural wastes are sufficiently utilized, the production cost is reduced, the purposes of environment protection and regeneration are achieved, local production of cultivation mediums in coastal mud flats is achieved, and the transportation cost is reduced.

The invention provides a street tree planting method, which includes the following steps: a. digging a tree hole at a place where a street tree is to be planted; b. paving a mixture of formulation soil and bluestone grains at the bottom of the tree hole to form a bottom layer, wherein the volume ratio of the formulation soil to the bluestone grains is 2: 8; c. arranging a planting device at the upper part of the bottom layer and paving a mixture of formulation soil and bluestone grains to form an intermediate layer, and reserving a planting pit for planting a street tree in the intermediate layer, wherein the planting device is positioned in the intermediate layer, and the volume ratio of the formulation soil to the bluestone grains is 5: 5; d. planting the street tree to be planted into the planting pit and filling the mixture of soil and bluestone grains with the volume ratio of 5: 5; and e. paving bluestone grains at the upper part of the intermediate layer to form an upper layer. The invention further provides a tree hole structure suitable for the planting method, the structure is beneficial to root respiration and absorption of water and fertilizers, and can provide a growthenvironment matched with street trees.

The invention relates to a novel environment-friendly anhydrous stemming for a blast furnace iron notch. The novel environment-friendly anhydrous stemming for the blast furnace iron notch is characterized by being prepared, by mass, 10-20 parts of coke, 10-20 parts of calcined pyrophyllite particles, 10-20 parts of brown fused alumina particles, 10-20 parts of bauxite powder, 5-10 parts of ferro silicon nitride, 5-10 parts of silicon carbide powder, 10-20 parts of clay, 5 parts of a carbon-based composite material and 5-10 parts of a composite binding agent. The novel environment-friendly anhydrous stemming for the blast furnace iron notch and a preparation method of the stemming have the following advantages that the pollution is small, the environment-friendly performance is good, and the stemming is a first choice of am iron and steel enterprise; the plasticity and cohesive property are good, the stemming is easily extruded into gaps and cracks, and the gaps and cracks are easily filled with the stemming; the porosity is proper, and moisture is conveniently discharged during drying; the volume contraction is small at high temperature, so that the cracks are prevented; the stemming is good in sintering performance, high in strength and resistant to flushing and corrosion; the stemming is easily cracked, the iron notch is deep, and the iron outlet time is long.

The invention discloses a lily culture substrate which belongs to the field of plant culture substrates, in particular to the field of lily culture substrates. The substrate is characterized by consisting of pindstrup No.5 substrate soil and perlite in the volume ratio of (2-3):1. The invention has the advantages that the substrate can provide a good nutrient condition and an appropriate degree of porosity for the growth of crops, reduces the using amount of peat cube, and remarkably promotes the growth and the development of lily mainly in the aspects of plant height, root length, root number and stalk thickness.

The invention provides a planting system and planting method suitable for southern magnolia. The planting system comprises a plant pit and a planting matrix. The planting matrix comprises a lower layer located at the bottom of the plant pit, wherein the lower layer is formed by a mixture of formula soil and filling particles according to the volume ratio of (1-2): 9; a middle layer located on the upper portion of the lower layer, wherein the middle layer is formed by a mixture of formula soil and filling particles according to the volume ratio of (4-5): 5, planting pits used for planting southern magnolia are reserved in the middle layer, and the mass water content of the middle layer is 65-75%; and an upper layer on the upper portion of the middle layer, wherein the upper layer is formed of filling particles. The three-layer structure of the planting matrix has appropriate porosity and good air permeability and water permeability, respiration of root systems and absorption of water and fertilizer are facilitated, and a growth environment matched with the southern magnolia can be provided for the southern magnolia.