611 results about "Rice hulls" patented technology

The invention discloses high-toughness ultra-high performance concrete and a preparation method thereof, and relates to the technical field of polymer modified materials thereof. The concrete is composed of a cementitious material composite system, a fiber-reinforced system and a polymer modifier, the cementitious material comprises Portland cement, nano-silica, a rice hull ash-based auxiliary cementitious material and gradient grading quartz powder, and the fiber system adopts steel fiber / basalt fiber / polypropylene fiber multi-scale composite reinforcement. And a polyurethane emulsion interface modifier is matched. During preparation, a dry mixing-fiber dispersion-wet mixing three-stage process is combined with a microfluidization emulsification and segmented polymerization technology, so that uniform dispersion of fibers and matrix-fiber interface reinforcement are realized. The scheme has high strength, high toughness and industrial feasibility, and is suitable for harsh engineering scenes such as bridge joints and explosion-proof structures.

According to the mullite castable preparation method based on comprehensive utilization of the secondary aluminum ash nonferrous smelting slag, components are regulated and controlled by controlling the molar ratio of Al2O3 to SiO2, so that porous light mullite stably falls into a mullite phase region, and generation of excessive corundum phases is avoided. PMMA microspheres, corn flour, carbonized rice husks and SiO2 coated calcium carbonate composite pore-forming agent systems are adopted, and a layered slurry formula, gradient slip casting and segmented sintering processes are combined, so that the porosity and strength distribution are accurately regulated and controlled, and low-temperature sintering and amorphous phase change control are realized. By optimizing the grading of the porous light mullite aggregate and adding the homologous fine powder, the bonding strength and compressive strength of the castable are improved. And finally, the surface of the castable is coated with a compact mullite coating, so that the porosity is reduced, and the erosion resistance, corrosion resistance and stripping resistance are remarkably improved. The obtained castable has the advantages of light weight, high temperature resistance, high strength, low cost and excellent thermal stability and erosion resistance.

The invention belongs to the technical field of fuel cell electrode material preparation, and particularly relates to a carbon electrode material for a polypyrrole modified bio-based fuel cell and a preparation method of the carbon electrode material. Comprising the following steps: modifying rice hull low-temperature carbonized powder by sequentially adopting POSS (Polyhedral Oligomeric Silsesquioxane) containing unipolar functional groups and POSS containing polypolar functional groups to obtain modified low-temperature carbonized powder; and carrying out in-situ polymerization on a pyrrole monomer on the surface of the modified low-temperature carbonized powder, and carrying out high-temperature carbonization and hydrofluoric acid corrosion to obtain the polypyrrole modified bio-based fuel cell carbon electrode material. The polypolar functional group POSS not only is beneficial to the in-situ polymerization reaction of pyrrole, but also can form a continuous macromolecular chain, and a net structure is formed on the surface of the whole material. The effect of the unipolar functional group POSS is to improve the stability of the low-temperature carbonized powder in the high-temperature carbonization process, and more importantly, the unipolar functional group POSS is to provide a channel for subsequent hydrofluoric acid corrosion, etch away non-conductive substances and improve the conductivity and specific surface area of the carbon electrode material.

The invention discloses a road cementing material based on bulk solid wastes and a preparation method thereof, and belongs to the field of geopolymer cementing materials. The material is prepared from 35-38 parts of fly ash, 15-18 parts of acid-washed red mud, 22-25 parts of carbide slag, 20-23 parts of phosphogypsum, 5-8 parts of rice hull ash, 6-9 parts of a water reducing agent and water, and the water-binder ratio is (0.4-0.5): 1. Wherein the pickling red mud is treated by 5-6% dilute sulphuric acid (pH is 8-9, and heavy metal is reduced by 30%), and the rice hull ash (SiO2 is greater than or equal to 85%) and the nano silicon dioxide (10-30nm) synergistically optimize the microstructure. The 28-day compressive strength of the material is larger than or equal to 35 MPa, the load cycle strength loss rate is smaller than or equal to 5%, the CO2 emission amount is 62 kg / t, the heavy metal leaching concentration is lower than the national standard by 50%, and the cost is only 31.6% of that of traditional cement. According to the invention, efficient synergistic utilization of four solid wastes of fly ash, red mud, carbide slag and ardealite is realized, and the concrete has the characteristics of high strength, low pollution, salt corrosion resistance and the like, is suitable for heavy-duty road base and severe cold area engineering, and has remarkable environmental protection and economic values.

The invention relates to a mine solid waste-based composite saline-alkali soil modifier as well as a preparation method and application thereof, and belongs to the technical field of soil remediation and solid waste recycling. The modifier is prepared from volcanic rock solid waste, rice husk and mussel shell as raw materials through oxalic acid activation, microbial fermentation carbonization and humic acid chelation, and comprises 50-70 parts of activated stone powder-containing porous particles, 20-30 parts of rice husk-based charcoal, 10-20 parts of humic acid chelated magnesium-calcium powder and 3-5 parts of a composite binder. The preparation method comprises the following steps: ultrasonically activating the stone powder oxalic acid, and puffing and granulating with the binder; inoculating the rice hulls with salt-tolerant bacillus and actinomycetes for aerobic fermentation and carbonization; and the shell is activated by oxalic acid and then is loaded with a humic acid calcium magnesium compound. The modifier is applied according to 50-200kg / mu, so that the nutritional ingredients and the air permeability can be improved. According to the method, solid waste recycling, solid waste consumption and landfill cost and CO2 emission reduction are achieved, and the method is suitable for ecological restoration of the coastal saline-alkali soil and has both environmental protection and economic benefits.

The invention discloses a tricholoma matsutake culture medium using litchi branches as a matrix and a cultivation method thereof. The tricholoma matsutake culture medium is prepared from the following components in percentage by weight: 30-50% of litchi sawdust, 30-50% of cottonseed hulls, 3-8% of bran, 3-8% of corncobs, 3-8% of rice husks, 1-5% of corn flour and 1-5% of lime. The method is characterized in that the litchi branches are added into the stock liquid culture medium for making the branch seeds for the first time, on one hand, the tricholoma matsutake strains can be trained to generate extracellular enzymes capable of utilizing litchi wood chips, macromolecules of the litchi branches can be rapidly decomposed, and on the other hand, nutrient elements contained in the litchi branches can promote growth of tricholoma matsutake hyphae more rapidly, and the growth rate of the tricholoma matsutake hyphae is increased. The branch seeds are large in inoculation area and high in hybrid resistance, the growth time of mycelium of the cultivation material can be shortened, and the fruiting rate is increased. The invention not only provides a solution for innocent treatment of the litchi branches, but also finds a new culture medium for red tricholoma matsutake culture.

The invention belongs to the technical field of concrete, and particularly relates to high-water-permeability recycled concrete. The concrete is prepared from 170 to 190 parts of water, 300 to 320 parts of cement, 90 to 120 parts of fly ash, 80 to 120 parts of silica fume, 90 to 110 parts of rice hull ash, 580 to 620 parts of medium sand, 430 to 470 parts of recycled fine aggregate, 1000 to 1100 parts of recycled coarse aggregate, 70 to 100 parts of ceramsite, 6 to 8 parts of a water reducing agent, 2 to 4 parts of an air entraining agent, 1 to 3 parts of a retarder, 110 to 130 parts of fly ash hollow microspheres, 70 to 90 parts of steel slag powder, 30 to 40 parts of silica sol, 20 to 30 parts of cellulosic fibers and 40 to 50 parts of an alkaline activator. 50-60 parts of an organic porous waste material; the composite material has abundant pore structures, strong water permeability, moderate strength, high resource utilization rate, outstanding environmental protection property and the like, improves the utilization rate of rainwater resources, and promotes continuous improvement of ecological environment.

The invention discloses lightweight low-carbon thermal insulation mortar, which is characterized by being prepared from the following ingredients in parts by weight: 100 to 160 parts of quick lime, 250 to 350 parts of phosphogypsum, 300 to 450 parts of mineral powder, 350 to 550 parts of coal gangue pottery sand, 60 to 100 parts of polystyrene foam particles, 70 to 110 parts of rice hulls, 180 to 260 parts of coffee grounds, 10 to 20 parts of polypropylene fibers, 2 to 4 parts of dispersing agents, 1 to 2 parts of air entraining agents and 600 to 700 parts of water. An alkali-activated cementing material composed of quicklime, ardealite and slag powder is adopted to replace a traditional cement-based cementing material, coal gangue pottery sand is adopted to replace common sand, and rice husks and coffee grounds are introduced as light filling materials, so that the light low-carbon thermal insulation mortar is successfully prepared and has good thermal insulation performance and mechanical performance, and the thermal insulation performance of the light low-carbon thermal insulation mortar is greatly improved. The carbon emission of buildings can be effectively reduced, and the strategic requirements of green buildings and sustainable development are met.

The invention discloses a method for preparing high-modulus sodium silicate and co-producing white carbon black from rice hull ash. The method comprises the following steps: crushing the rice hull ash, and acidizing to obtain purified rice hull ash powder; reacting the purified rice hull ash powder with 5wt%-15wt% of caustic soda generated by bipolar membrane electrolysis to prepare a sodium silicate solution; carrying out neutralization reaction on the sodium silicate solution and 1-15 wt% of sulfuric acid solution under the assistance of ultrasonic waves, and filtering to obtain silicon dioxide silica gel and filtrate; washing and drying the silicon dioxide silica gel to obtain a white carbon black product; and carrying out electrolytic treatment on the filtrate through a bipolar membrane electrodialysis system, and respectively recycling the recovered alkali liquor and acid liquor. According to the method, resource utilization of the rice hull ash and cyclic regeneration of the reaction medium are realized, and a green production process is formed.

The invention belongs to the field of soil solidification, and particularly relates to a method for reinforcing a loess foundation through cooperation of EICP and rice husks. Comprising the following steps: 1, compounding long and short rice hull fibers, and sequentially carrying out alkali treatment activation, coupling agent modification and hydroxypropyl methyl cellulose reinforcement treatment; 2, calcining rice hulls, and grinding to obtain rice hull ash; 3, mixing a composite reinforcing agent obtained by compounding the modified and reinforced rice hull fibers and rice hull ash with loess to be reinforced; 4, mixing the urease extracting solution with a reinforcing solution containing urea and calcium ions, and adjusting the pH value to weak acidity to obtain mixed slurry; and 5, the mixed slurry is sprayed into the to-be-reinforced loess mixed with the composite reinforcing agent, and after grouting is finished, the surface of the soil body is covered with a film and subjected to water spraying maintenance. Through synergistic cooperation of the rice hull fibers and the rice hull ash, the common problems of non-uniform cementation and poor deep reinforcement effect during loess reinforcement by an EICP technology are effectively solved.

The invention discloses a porous carbon preparation method and a continuous fluidized bed system.The porous carbon preparation method comprises the steps that rice husks and bamboo fibers are mixed and smashed, the smashed rice husks and bamboo fibers are dried and then mixed with a composite activating agent solution to be steeped, and a pretreated material is formed; feeding the pretreated material into a first-stage fluidized bed, and carbonizing the pretreated product in a nitrogen atmosphere to obtain a carbonized product; feeding the carbonized product into a second-stage fluidized bed, introducing saturated steam and CO2 gas into the second-stage fluidized bed in stages, and activating the carbonized product to obtain an activated product; feeding the activated product into a third-stage fluidized bed, introducing methane gas into the third-stage fluidized bed in an inert gas atmosphere, and performing micropore surface modification on the activated product to obtain a modified product; and washing the modified product with a hydrochloric acid solution and deionized water in sequence, and carrying out vacuum drying to obtain a porous carbon product. According to the preparation method of the porous carbon, the micropore development efficiency is improved, and continuous production of the porous carbon with high specific surface area and high micropore proportion is realized.

The invention discloses a white carbon black preparation method based on rice husk resource utilization, which comprises the following steps: carbonization: drying rice husks, carrying out anoxic carbonization at 550-600 DEG C for 3-4 hours, crushing and sieving; alkali dissolution: mixing the carbonized rice husks with a 2mol / L NaOH solution according to a mass ratio of 1: (5-7), reacting in a water bath at 95 DEG C for 3-4 hours, and filtering to obtain a sodium silicate solution; acid leaching: slowly adding a 9-10% H2SO4 solution into the filtrate, firstly adjusting the pH value to 11-12, aging for 1 hour, then adjusting the pH value to 9-10, and aging for 2-3 hours at 80 DEG C; post-treatment: washing to be neutral, and drying to obtain a white carbon black product. The specific surface area of the product is larger than or equal to 200 m < 2 > / g, the SiO2 purity is larger than or equal to 95%, efficient comprehensive utilization of rice hull resources is achieved, and the white carbon black production cost is reduced; a staged pH regulation and control process is developed, and the amorphous state purity of the white carbon black is improved; and a carbonization-alkali dissolution-acid leaching whole-flow process system is constructed, so that the environmental pollution is reduced.

The invention discloses medium and low temperature porous wave-absorbing iron-based composite ceramic and a preparation method thereof. The medium and low temperature porous wave-absorbing iron-based composite ceramic is prepared from the following raw materials in percentage by weight: 10 to 50 weight percent of wave-absorbing functional phase, 20 to 40 weight percent of ceramic matrix, 5 to 15 weight percent of pore forming agent, 5 to 10 weight percent of dielectric loss phase, 0.5 to 1 weight percent of stearic acid, 0.2 to 0.5 weight percent of silane coupling agent and 30 to 34.5 weight percent of binding phase. According to the preparation method, a low-temperature sintering process is adopted for optimization, and the activity of the magnetic loss phase is protected. The iron-based composite ceramic with a gradient porous structure is obtained by adopting a freezing injection molding method, and broadband efficient wave absorption can be realized. The magnetic-dielectric cooperative loss is enhanced, and the limitation of a single mechanism is broken through. Starch or rice hull ash microspheres are used as a degradable pore-forming agent, so that green process and short-process design are realized. The mechanical property and the stability of the iron-based composite ceramic structure are improved, the application scene is expanded, and the cost advantage is achieved.

The invention discloses a preparation method and application of an iron-manganese modified biochar material for remediation of cadmium and arsenic contaminated soil, and relates to the field of new materials.According to the material, rice hull biochar serves as a carrier, and the specific surface area and surface active sites are increased through programmed intermittent ball milling; and the Fe-O / Mn-O bonding modification complex is formed through gradient loading of iron and manganese oxides. The maximum adsorption capacity of the material to Cd < 2 + > and As (V) reaches 71.54 mg.g <-1 > and 49.30 mg.g <-1 > and is 1.65 / 2.53 times that of original biochar, the content of available Cd and As in soil is reduced by 8.98% and 25.2% under the condition that the addition amount is 0.4%, and the passivation efficiency is improved by 1.05 times (Cd) and 9.08 times (As) compared with that of non-ball-milled iron-manganese modified biochar; the material prepared by the method is applied to cadmium and arsenic polluted soil, pollution can be controlled by waste, and the soil can be effectively repaired.

The invention discloses a rice hull fiber environment-friendly material and a preparation method thereof, and belongs to the technical field of polypropylene plastics. The preparation method is used for solving the technical problems that a plastic product prepared from polypropylene plastic in the prior art is difficult to degrade, and the mechanical property of the polypropylene plastic can be damaged by doping degradable organic components. The rice hull fiber environment-friendly material comprises rice hull fiber composite microspheres, a chlorinated polypropylene graft copolymer and related auxiliaries. The rice hull fiber composite microspheres are prepared by blending acylated rice hull fiber powder and a melt as a core material, wherein the melt is obtained by mixing rosin, silver nitrate and polylactic acid and heating; the chlorinated polypropylene grafted copolymer is obtained by taking chlorinated polypropylene as a main body and initiating grafting of methyl methacrylate and triallyl cyanurate. The rice hull fiber environment-friendly material prepared by the invention has the advantages of good mechanical property, bacteriostasis, flame retardance and degradability.

The invention discloses a high organic matter sludge-based ecological restoration spray-seeding base material preparation and vegetation method, the spray-seeding base material is prepared by mixing 60%-75% of dehydrated sludge, 5%-10% of an ecological curing agent, 3%-5% of pretreated straw fiber, 3%-8% of broken rice husk and 10%-15% of a solid waste conditioner by dry mass, a certain amount of water is added to adjust the slump of the base material to 170-180mm, and the spray-seeding base material has the characteristic of early strength. The planting construction is performed by three times of spray-seeding, the spray-seeding thickness of each time is 5-7cm, the interval time is not less than 3h, grass seeds are mixed during spray-seeding of the last layer, and the surface is covered with a degradable fiber net. The prepared base material has good fluidity, mechanical strength and vegetation performance and can be applied to various slope ecological restoration and greening planting projects, and large-scale collaborative ecological utilization of river and lake bottom mud and other industrial solid waste materials is achieved.

The invention provides a cattle fermentation bed composite padding based on bacterium-enzyme synergistic effect and a preparation method thereof, and relates to the technical field of livestock and poultry breeding, the cattle fermentation bed composite padding comprises a rice hull layer located at the top, a slow release layer located in the middle and a fermentation layer located at the bottom, the rice hull layer comprises hydrophobic modified rice hulls, the slow release layer comprises PLA melt-blown cloth, and the fermentation layer comprises PLA melt-blown cloth. The PLA melt-blown cloth is compounded with microspheres through hot pressing, and the fermentation layer comprises the following components in parts by mass: 0.5-2 parts of aspergillus niger spores, 8-15 parts of bran and 90-110 parts of bagasse. The method has the beneficial effects that turning-free, self-oxygen-adjusting and long-acting fermentation can be realized, and efficient fermentation and long-term stable operation are realized by adopting a three-layer sandwich structure and combining hydrophobic modification, gas slow release and bacterium-enzyme synergistic degradation technologies.

The invention belongs to the technical field of nutritional aggregates, and particularly relates to a core-shell type slow-release water-retention nutritional aggregate as well as a preparation method and application thereof. The method comprises the following steps: 1) mixing a nutrition base material and rice hull powder to obtain first coating layer powder; 2) adding ceramsite and a cementing material into a ball forming mill, and premixing to obtain ceramsite coated with the cementing material; (3) adding a binder and the first coating layer powder obtained in the step (1) into the ball forming mill, continuously premixing, and forming a second coating layer on the surface of the ceramsite coated with the cementing material to obtain a core-shell material; (4) curing the core-shell material; and 5) drying and screening the core-shell material to obtain the core-shell type slow-release water-retention nutritional aggregate. The comprehensive improvement of mechanical properties, water retention, slow release and environmental adaptability is realized.

The invention relates to the technical field of foamed ceramics, in particular to a foamed ceramic and a preparation method thereof. The foamed ceramic comprises the following raw materials in parts by weight: 30-50 parts of waste cathode carbon blocks, 15-30 parts of rice hull ash, 15-30 parts of fly ash, 3-10 parts of calcium carbonate, 3-10 parts of expanded perlite and 2-5 parts of basalt fibers. According to the invention, the waste cathode carbon block is pretreated to form a porous structure, the porous structure and gas decomposed by calcium carbonate are jointly used as a gas source at a high temperature to generate initial pores, and a glass phase formed after rice hull ash activation has certain fluidity during sintering, and can fill pores, adjust pore surface tension and promote uniform expansion of the pores; the basalt fibers are inserted into the matrix in a three-dimensional bracket form, and collapse of pores due to high-temperature shrinkage or gas escape is prevented through physical support, so that the stability and uniformity of the pore structure are ensured, and the heat insulation performance of the foamed ceramic is improved.

The invention relates to the technical field of regenerated rubber preparation, in particular to a preparation method of high-performance regenerated rubber based on modified calcium sulfate whiskers and rice husk charcoal, which comprises the following steps: S1, mixing anhydrous calcium sulfate and absolute ethyl alcohol, pouring into a four-mouth bottle, carrying out ultrasonic treatment for 0.5 hour, heating to 80 DEG C while stirring in a water bath kettle, adding a surface modifier, and stirring for 0.5 hour; heating for 5 hours, centrifugally washing, and drying the final product in a vacuum drying oven for 2 hours to obtain the modified calcium sulfate whisker. S2, preparing modified rice husk charcoal; and S3, mixing the modified calcium sulfate whiskers, the modified rice husk charcoal and regenerated rubber by using an open mill, uniformly mixing, putting into a mold, and tabletting by using a press vulcanizer to obtain the high-performance regenerated rubber based on the modified calcium sulfate whiskers and the rice husk charcoal. The industrial by-product calcium sulfate and the agricultural waste rice husk are used as raw materials and have the characteristics of no pollution and regeneration cycle, the high-performance filler is prepared through a green process, and the production cost is reduced while the rubber performance is improved.

The application discloses a zinc extraction process from secondary zinc oxide, and belongs to the technical field of zinc oxide preparation. In the rotary kiln roasting, composite porous flaky reducing carbon with waste paper, rice husk and wooden chips as main raw materials is used as a reducing agent. Compared with the commercially available anthracite, the composite porous flaky reducing carbon has low cost, realizes resource recycling, and has a large specific surface area and porous properties. A multi-level structure of flaky layers and pores is constructed, so that the contact sites of the composite porous flaky reducing carbon and the secondary zinc oxide are increased. The porous structure can avoid the caking of the material layer caused by the stacking and agglomeration of the flaky layers, and avoid the obstruction of gas flow, so that the pain points of the traditional reducing agent, such as local agglomeration and insufficient contact, are solved. The surface of the composite porous flaky reducing carbon is deposited with calcium oxide. The presence of the calcium oxide can react with a small amount of sulfur elements generated in the rotary kiln roasting process of the composite porous flaky reducing carbon, so as to generate calcium sulfate and reduce the content of sulfur dioxide.

The invention belongs to the technical field of high-speed railway ballastless track construction, and particularly discloses an anti-crack functional material for ballastless track roadbed slab concrete and a preparation method of the anti-crack functional material. The anti-cracking functional material provides a whole-course expansion effect and delays early expansion by means of a mode of coating calcium oxide with calcium carbonate and compounding magnesium oxide; the protein modified starch is used as a hydration heat regulation and control layer, so that the regulation and control effect of single starch on cement hydration heat is improved, and a compound expanding agent is slowly released; carbonized and expanded rice husks are used as a biomass water-absorbing and anti-releasing material, so that the self-shrinkage and drying shrinkage of the concrete are reduced; the temperature-sensitive microgel material is used as the outermost layer component, the highest temperature value of the roadbed slab concrete is reduced, the temperature drop shrinkage stress of the concrete is improved, and the temperature shrinkage cracking risk of the roadbed slab concrete is inhibited. Various shrinkage stresses of the roadbed slab are accurately regulated and controlled, the limiting and restraining stress of the prefabricated sleeper and the base on the concrete of the roadbed slab is effectively compensated and improved, and the anti-cracking performance of the concrete of the ballastless track roadbed slab is fundamentally improved.

The invention discloses an anti-fracture building concrete material and a preparation method thereof, and relates to the technical field of building materials, the concrete material comprises the following raw materials by weight: 280-380 parts of cement; 500 to 600 parts of fine aggregate; 800 to 1000 parts of coarse aggregate; 1.5 to 3.5 parts of a degradable fiber inclusion; 20 to 40 parts of silica fume; 15 to 30 parts of rice hull ash; 10 to 20 parts of modified natural zeolite; 5-10 parts of an intelligent phase change material; 3-5 parts of a polycarboxylic acid water reducer; 5 to 10 parts of a calcium sulphoaluminate expanding agent; 150 to 200 parts of water; through the elaborately designed material formula, the anti-fracture performance and durability of the concrete are remarkably improved, the introduced degradable fiber inclusion is prepared by wrapping aramid fibers with a starch-based degradable material, and the structure enhances the interface bonding force between the fibers and a concrete matrix and also improves the durability of the concrete. The expansion of microcracks in the concrete is effectively inhibited through the high-strength characteristic of the aramid fibers, and the tensile strength and toughness of the concrete are improved.

The utility model discloses bag-breaking-free unpacking equipment for rice hulls, and belongs to the technical field of rice hull unpacking, the bag-breaking-free unpacking equipment for the rice hulls comprises a main body frame and a rice hull bag, one side of the main body frame is fixedly connected with a telescopic push rod, one end of the telescopic push rod penetrates through one side of the main body frame and is fixedly connected with a pressing plate, and the other end of the telescopic push rod is fixedly connected with the rice hull bag. One end of the main body frame is fixedly connected with an intercepting frame, and four elastic connecting pieces are fixedly connected to the inner bottom end of the main body frame, so that a packaging bag on the surface of a rice hull bag can deform within a deformation range without damaging the structure of the packaging bag, but compressed rice hulls in the rice hull bag can loosen due to deformation; the loosened rice hulls are very easy to fall off from the packaging bags under the vibration of the vibration mechanism, so that the rice hull bags are unpacked, the structures of the packaging bags on the surfaces of the rice hull bags are not damaged, the utilization rate of the packaging bags is increased, manual operation is not needed, the labor burden of workers is reduced, and the unpacking efficiency can be greatly improved.

The invention discloses a high-strength light-weight silica brick and a preparation method thereof, and relates to the technical field of refractory ceramic materials, and the high-strength light-weight silica brick comprises refractory grade polycrystalline mullite fibers, silica sand fine powder, carbonized rice husks, water, hydrophobic silica aerogel, a sodium carboxymethyl cellulose solution, an ammonium salt solution, K12 powder and agar powder. The hydrophobic silicon dioxide aerogel is prepared from silicon dioxide aerogel modified by hexamethyldisilazane (HMDS); according to the aerogel material, the mechanical strength can be enhanced, the compression resistance is improved, the thermal stability is improved, the aerogel material has extremely high heat insulation performance, the aerogel material has a single function, and an innovative solution is provided for integration of strength, toughness and heat insulation.

The invention provides an agricultural waste composite modified edible fungus culture medium and a preparation method thereof. The agricultural waste composite modified edible fungus culture medium is prepared from the following components in parts by mass: 20 to 30 parts of corn straw, 15 to 25 parts of rice hull, 10 to 20 parts of sawdust, 25 to 35 parts of cottonseed hull, 5 to 10 parts of soybean meal, 0.5 to 2.0 parts of complex microbial inoculant, 3 to 8 parts of bentonite, 1 to 3 parts of chitosan, 1 to 2 parts of gypsum and 1 to 2 parts of lime. According to the invention, the complex microbial inoculants are adopted to carry out solid state fermentation modification on the basic mixture, bentonite and chitosan are compounded into the activated functional slurry, and through the synergistic effect of solid state fermentation and the functional slurry, the granular structure, water retention and air permeability of the matrix are fundamentally improved, and efficient activation and slow release of nutrients are realized; finally, the fruiting period of the shiitake mushrooms is shortened to be within 85 days, the yield is increased by 10% or above, the shiitake mushroom proportion is remarkably increased, and high-value utilization of agricultural waste is achieved.

The invention relates to the technical field of preparation of novel bio-based materials, in particular to a preparation method for producing a rice hull-based high-purity high-modulus sodium silicate solution by taking rice hulls as raw materials. Rural solid waste rice hulls / grass are used as raw materials, combustion is carried out at the fixed low temperature of 700-750 DEG C, generated steam is used for supplying heat to the production or the park, and the combusted rice hull ash contains amorphous silicon dioxide gt; 90%; the method comprises the following steps: activating rice hull ash just out of a chamber and diluted hydrochloric acid (5-10%) to generate polyhydroxy surface modified silicon dioxide active seeds; the method comprises the following steps: dynamically mixing rice hull ash and a 25% NaOH solution according to a molar ratio of (3.25-4): 2, adding 3-7% of active seeds in batches at 105 + / -5 DEG C, and reacting for more than or equal to 3 hours; the high-purity sodium silicate solution with the modulus of 3.25-4.0 is finally obtained through pH segmented regulation (Mg < 2 + > is removed at the pH of gt and 12, and Ca < 2 + > is removed at the pH of 9.5-10) in combination with high-pressure refined filtration; the product is mainly used for preparing nano silicon dioxide, especially for preparing 5nm silicon dioxide dispersion liquid and high-purity electronic grade silicon dioxide as raw materials.

The invention provides a preparation method of artificial oven subsoil. The preparation method comprises the following steps: firstly, mixing shrub ash, rice hull ash and wormwood ash in proportion to prepare plant ash, then mixing calcined and crushed oyster shells and plant ash, adding water, washing and removing impurities to prepare mortar, and then adding loess powder for injection molding; drying at the temperature of 250-350 DEG C, oxidizing at the temperature of 450-650 DEG C and reducing at the temperature of 750-850 DEG C to finally obtain the artificial oven subsoil. According to the method, the natural production process of traditional oven subsoil is simulated, the compound structure and effective component composition of the natural oven subsoil are successfully reproduced, the obtained product is stable in component and quality, the content of heavy metal and pesticide residues meets the safety standard, and the problems that natural resources are exhausted, and the quality of the oven subsoil all over the country is uneven are effectively solved.

The invention relates to the technical field of solid waste treatment, in particular to a zeolite-based porous adsorption material and a preparation method thereof. The zeolite-based porous adsorption material is prepared from light particles and alkali liquor through a zeolitization reaction, and the light particles are prepared from the following raw materials in parts by mass: 30-60 parts of regenerated micro powder, 5-15 parts of red mud, 5-15 parts of glass powder, 10-40 parts of solid waste powder and 5-15 parts of a foaming agent; the regenerated micro powder is cement-based construction waste regenerated micro powder, and the solid waste powder comprises one or more of fly ash, coal gangue and fine coal gasification slag; the foaming agent comprises charcoal and / or rice hull ash. The multi-solid-waste zeolite-based porous adsorption light particles with excellent performance and good economic and environment-friendly benefits are prepared by taking the construction waste regenerated micro powder as a main raw material and synergistically using various solid wastes and the foaming agent.

The invention relates to the technical field of building materials, and discloses a preparation method of biomass aggregate lightweight wall impervious concrete and concrete.The preparation method comprises the following steps that 1, biomass aggregate is pretreated, specifically, a rice hull or straw biomass raw material and a sintering agent are mixed, pressed and formed, sintering in a vacuum furnace to prepare biomass-based wood ceramic spherical particles; (2) aggregate surface hydrophobic treatment: pretreating the biomass-based wood ceramic spherical particles obtained in the step (1) with a surfactant solution, and then carrying out vacuum impregnation treatment with a paraffin-silane composite emulsion; by adopting surfactant pretreatment and a paraffin-silane composite emulsion vacuum impregnation process, a surfactant can reduce the surface tension of an emulsion and promote a hydrophobic component to permeate into internal pores of the aggregate, and a vacuum environment eliminates air resistance in the pores, so that a hydrophobic material and pore walls of the aggregate form firm combination, and the hydrophobic effect is more lasting.