551results about How to "Many pores" patented technology

A massive body, e.g., a tablet, for producing a solution of chlorine dioxide when the massive body is added to liquid water. The massive body comprises a metal chlorite such as sodium chlorite, an acid source such as sodium bisulfate and a source of free halogen such as the sodium salt of dichloroisocyanuric acid or a hydrate thereof. The concentration of free halogen in the solution will be:(a) less than the concentration of chlorine dioxide in said solution on a weight basis and the ratio of the concentration of chlorine dioxide to the sum of the concentrations of chlorine dioxide and chlorite anion in said solution is at least 0.25:1 by weight; or(b) equal to or greater than the concentration of chlorine dioxide in said solution on a weight basis and the ratio of the concentration of chlorine dioxide to the sum of the concentrations of chlorine dioxide and chlorite anion in said solution is at least 0.50:1 by weight.

The invention relates to a method for preparing activated carbon. In the method, rice husks are taken as a raw material, NaOH is taken as an activator, and an activated carbon product is prepared through high temperature carbonization and activation, has high specific surface area, low ash content, a large number of distributed micropores, and high adsorption property, and is an ideal adsorption material, an ideal electrode material, an ideal hydrogen storage material and an ideal catalyst carrier. Alkaline solution is not required to be used for impregnation and activation, and the obtained product has a small particle size, has the characteristics of wide raw material source, low cost and simple process, is suitable for popularization, and has certain economic significance and environment-friendly significance.

The invention relates to saline-alkali soil paddy rice special-purpose carbon-based organic fertilizer. The saline-alkali soil paddy rice special-purpose carbon-based organic fertilizer has a low cost and high fertilizer efficiency, is economic and environmentally friendly, improves a soil water binding capacity and permeability, and has functions of keeping fertility, slowly releasing fertilizer and reducing paddy rice salinization. The saline-alkali soil paddy rice special-purpose carbon-based organic fertilizer comprises biomass charcoal, chicken manure, pyroligneous liquor, fermented soybean meal and potassium humate. The biomass charcoal is prepared by thermal cracking charring of biomass raw materials under anoxic conditions. The saline-alkali soil paddy rice special-purpose carbon-based organic fertilizer can be used for paddy rice plantation, can improve a saline-alkali soil environment and can improve an organic paddy rice yield.

The invention relates to a graphene macroscopic body / a tin oxide composite lithium ion battery anode material and a process thereof. The anode material consists of a three-dimensional graphene macroscopic body and nano tin dioxide which grows in a pore of the three-dimensional graphene macroscopic body in an orientated way; and a volume is 500 to 2,000 mAh / g; the coulomb efficiency is 80 to 99.5 percent, wherein a mass ratio of the three-dimensional graphene macroscopic body to the tin dioxide is 1:(0.1-20). The characteristic of high electric conductivity of graphene is kept, the transfer and transport of charges are facilitated, and microscopic and macroscopic electric network structures are formed; meanwhile, the three-dimensional graphene macroscopic body has a big specific surface area and abundant pore spaces, so that the transfer of lithium ions is facilitated, and the contact area of the electrode material and electrolyte is enlarged; and the preparation process is environment-friendly, pollution-free and suitable for industrial production.

The invention relates to a preparation method of a lodging-resistant multi-difference polyester low elastic filament. The preparation method comprises the following steps: firstly, mixing nano sepiolite fibers, organic magnesium hydroxide whisker, organic barium sulfate nano powder, ethylene glycol, propylene glycol, p-hydroxybenzoic acid and sodium germanate to obtain a high-modulus composite alcohol solution; secondly, mixing organic wollastonite nano needle-like fibers, mica powder, polyethylene glycol, the propylene glycol, an antioxidant 1010, ethylene glycol antimony and protonated agent phosphoric acid to obtain a high-modulus composite promoter; thirdly, co-polycondensing the high-modulus composite multifunctional alcohol solution and the high-modulus composite promoter with purified terephthalic acid and the ethylene glycol to obtain high-modulus modified polyester; a melt of the high-modulus modified polyester is sprayed from a T-shaped spinneret orifice in a spinneret plate; the lodging-resistant multi-difference polyester low elastic filament is prepared by a special cooling mode and a low-temperature texturing process. The fiber prepared by the preparation method has multiple different properties of different crystallization, different orientation and different shrinkage; after different shrinkage, the appearance is good, and a brushed fabric prepared from the lodging-resistant multi-difference polyester low elastic filament is not easy to lodge.

The invention discloses an organic substrate suitable for planting vegetables, melons and fruits and a preparation method thereof. The preparation method is characterized by comprising the following steps of: mixing the following materials in percentage by weight: 30 to 40 percent of water hyacinth, 20 to 35 percent of sawdust, 10 to 20 percent of biomass char, 10 to 20 percent of wormcast, 0.3 to 1.1 percent of beneficial microflora, and 0.8 to 1.7 percent of nonmetallic mineral, and stirring the materials by using water with an EC value of less than 150US.cm<-1>; fermenting for 48 hours in a storeroom at the temperature of between 20 and 28 DEG C, and composting for 25 to 30 days at the temperature of between 40 and 90 DEG C so as to prepare the organic substrate. The organic matrix hasthe advantages of rich nutrition, strong air permeability, low cost, and capacities of improving the plant yield and quality and reducing the plant diseases and insect pests.

The present invention relates to one kind of suspended microbial carrier for biological waste water treatment. The mixture of rubber powder in 35-70 wt%, resin in 25-55 wt%, chemical foaming agent in 0.1-5 wt% and specific weight regulating material in 0-10 wt% is hot extruded to form shaped body of 0.90-1.1 g / cu cm specific weight and with great amount of closed bubbles. The suspended microbial carrier has great buoyancy, and can maintain suspension state in treated water after microbe attachment. In addition, nutritious matter may be added into the carrier material for promoting the colonization and growth of microbe.

The invention discloses molding sand. The molding sand is characterized by being prepared from the following materials in parts by weight: 200-240 parts of quartz sand, 30-35 parts of sericite, 60-70 parts of kaolin, 30-40 parts of calcium carbonate, 10-15 parts of coke powder, 10-15 parts of clays, 2-4 parts of titanium dioxide, 4-5 parts of aluminum oxide powder, 20-30 parts of argil, 3-4 parts of asphalt, 10-15 parts of bentonite, 3-4 parts of ammonium dihydrogen phosphate, 4-5 parts of sodium metasilicate, 2-3 parts of sodium dodecyl benzene sulfonate and an appropriate amount of water. According to the invention, the quartz sand, the sericite and the kaolin are used and roasted to achieve abundant pores and good gas permeability, moreover, mobility is good, and grinding of added calcium carbonate, clay, titanium dioxide, asphalt, and the like is combined, so that the molding sand has excellent cohesiveness, plasticity and heat stability, and also has high collapsibility. The molding sand material disclosed by the invention is fine and uniform; a casting piece produced by the molding sand has a smooth surface and a few flaws.

The invention discloses a lead / carbon composite for a storage battery. The lead / carbon composite is prepared from the following raw materials in percent by weight: 85-99.9 percent of lead-salt solution and 0.1-15 percent of conductive carbon material, wherein the lead salt solution is prepared from a soluble lead salt and deionized water, and the mol concentration of the lead salt solution is 0.1-0.8M. The invention also discloses a preparation method of the lead / carbon composite for the storage battery. The lead / carbon composite is substantially a conductive carbon material modified by lead oxide. Lead has the characteristics of low resistivity, high plasticity and high hydrogen evolution overpotential. The characteristics of the lead ensure that the hydrogen evolution overpotential of the carbon material after modified by PbO in a lead-acid battery is remarkably increased; and meanwhile the charging current occupied by partial hydrogen evolution reaction in a charging process is reduced, and the charging efficiency is increased.

The invention provides a method for effectively removing ammonia nitrogen from a polluted water body, which comprises the following steps of: removing large suspended particles from source water polluted by a nitrogen source by the conventional drinking water treatment process; introducing into a modified nitrifying bacteria immobilization filter to remove the ammonia nitrogen by using immobilized nitrifying bacteria; and performing loading modification and nitrifying bacteria immobilization on activated carbon used in the nitrifying bacteria immobilization filter. By the method, the ammonia nitrogen in micro-polluted source water can be effectively removed at normal temperature and at a low temperature; meanwhile, operating cost is obviously reduced; the active element iron loaded by theactivated carbon is favorable for improving the ammonia nitrogen adsorption property of the activated carbon; and the nitrifying bacteria are stably attached. The method is suitable for treating water bodies with different pollution degrees, and is good in effect and wide in application range.

The invention relates to a thermal preparation method of a solution of a self-supported porous graphene-based membrane, relates to a preparation method of a self-supported porous graphene-based membrane, and aims to solve the technical problems that the size and the thickness of a conventional self-supported porous graphene-based membrane are limited and the electrochemical performance of the conventional self-supported porous graphene-based membrane is poor caused by severe interlay lamination of graphene sheets in the chemical reduction process. The thermal preparation method comprises the following steps: dispersing graphene oxide into water, adding or not adding a doped carbon material, concentrating, and spreading into a membrane, thereby obtaining a graphene oxide membrane; preparing a thermal treatment solution by using acid or alkali solute, putting the graphene oxide membrane into a reaction kettle with a polytetrafluoroethylene lining, adding the thermal treatment solution according to the standard that the membrane is submerged, sealing the reaction kettle, and subsequently performing thermal treatment, thereby obtaining the self-supported porous graphene-based membrane. The self-supported porous graphene-based membrane is prepared by orderly arranging graphene sheets in parallel, and due to the gaps among the graphene sheet layers, the self-supported porous graphene-based membrane can be used in electrochemical energy storage devices such as supercapacitors.

The invention discloses a method for preparing a tin dioxide / graphene-compounded anode material of a lithium ion battery. The method comprises the following steps: uniformly mixing choline chloride, ethylene glycol and graphene oxide to obtain a mixed solution, adding stannous chloride to the mixed solution, performing ultrasonic oscillating reaction, and performing post-processing to obtain the product. According to the method for preparing the tin dioxide / graphene-compounded anode material of the lithium ion battery, a normal-pressure and normal-temperature one-step method is adopted, the adopted raw materials are simple in components and common and easy to obtain, the reaction conditions are mild and controllable, the reaction can be performed at normal temperature and normal pressure, and the preparation process is simple and practicable, has low requirements for equipment so as to be free from geographical restrictions, and is suitable for large-scale industrial production. The prepared tin dioxide / graphene-compounded anode material of the lithium ion battery has excellent electrochemical properties, and can be used as an active electrode substance for preparing an anode of the lithium ion battery so as to have a wide market application prospect.

The invention discloses a preparation method for titanium dioxide serving as a catalyst carrier. The preparation method comprises the following steps of: dispersing metatitanic acid serving as a raw material by pulping, and adjusting until the concentration of the slurry is 12 to 26 mass percent based on titanium dioxide (TiO2); adding ammonia water into the slurry, and adjusting the pH value to be between 6.0 and 9.0; filtering and dehydrating to obtain a blocky filter cake; mechanically crushing the blocky filter cake; drying and calcining the crushed filter cake at 200 to 560 DEG C for 6 hours; and grinding the calcined material in a kiln to obtain a titanium dioxide product which serves as a denitration catalyst carrier. By the preparation method, the manufacturing cost is low, the process is simple, the prepared product has the advantages of large specific area, high surface chemical activity and high processability, and the prepared final product is high in catalytic efficiency.

The invention discloses flexible conductive MXene-based foam and a preparation method thereof, wherein the flexible conductive MXene-based foam is formed by compounding a two-dimensional metal carbon / nitride nanosheet (MXene) and flexible non-conductive polymer foam. The preparation process mainly comprises preparation of a high-conductivity MXene nano-sheet dispersion liquid and construction of MXene-based composite foam, wherein the MXene-based composite foam perfectly integrates high conductivity and hydrophilicity of MXene and flexibility of polymer foam, so that the MXene-based compositefoam has the characteristics of high flexibility, hydrophilicity and high conductivity. The method is simple and easy to implement, the problem of MXene-based foam construction is effectively solved,and the obtained three-dimensional MXene-based foam material has excellent physical, chemical and mechanical properties and has huge application prospects in the fields of catalysis, sensors, photothermal conversion, electromagnetic shielding, composite materials, electrochemical energy storage and the like.

The invention discloses a silt-matrical ecological floating island and a construction method thereof. The silt-matrical ecological floating island is constructed by the following materials: silt, light material ESP bubble grains and a curing agent prepared as per certain proportion. The steps thereof are: the lake silt, the bubble grains and the inorganic bond (curing agent, silicate, phosphate, borate or the compound thereof, such as cement or clay, and the like) and water are mixed and stirred; the mixture is filled in a mould; after solidification, dryness and molding, the mixture is taken out; the mixture is put in the polluted water body independently or after plants are planted; and the polluted water body is purified by the growth of microorganisms and plants on the floating island. Being inorganic materials, all the raw materials have stable chemical performance and no secondary pollution and is environmental-friendly, the co-action of plants and microorganisms is utilized for purifying water bodies, perfecting sights, and the effect is stable.

The invention belongs to the technical field of material chemistry, in particular to a lithium sulfur battery cathode material and a lithium sulfur battery thereof. A lithium sulfide battery cathode material is prepared by that following preparation method: using N, N-Dimethylformamide as solvent, dissolving polyacrylonitrile and silica in N, N-Dimethylformamide Solution to prepare the spinning precursor liquid; preparing a silica-polyacrylonitrile membrane by using the electrospinning; carbonizing the silica-polyacrylonitrile membrane to obtain carbon fiber-silica composites, then soaking thecarbon fiber-silica composite in hydrofluoric acid to form the porous carbon fiber material, and doping the porous carbon fiber material with sulfur to prepare nitrogen doped porous carbon-sulfur cathode material in situ. The cathode material of the lithium sulfide battery has a porous structure, provides a large number of ion channels and a high specific surface area, effectively improves the shuttle effect of polysulfides in the lithium sulfide battery, and improves the cycle life of the lithium sulfide battery and the utilization rate of active substances in the cathode material.

The invention relates to the technical field of soil improvement, and concretely discloses a saline-alkaline land soil conditioner, and a preparation method and an application thereof. Raw materials of the conditioner comprise 400-600 parts of a biomass decomposed material, 150-242 parts of a pyroligneous liquor, 200-300 parts of charcoal powder, 4-10 parts of urea and 2-10 parts of a microbial agent. All the components are synergistically combined, so the conditioner contains abundant organic matters, provides favorable conditions for crop growth, can improve the physical and chemical properties of the soil and slowly release nutrients, improves the fertilizer utilization rate and the water holding capacity of the soil, effectively reduces the pH value of the soil and the salt content ina soil solution, delays accumulation of salt in the surface soil, and has a good improvement effect on saline-alkaline land soil.

The invention discloses a fragrance enhanced granular additive for filter sticks and a preparation method and application thereof. The fragrance enhanced granular additive for the filter sticks is prepared and obtained by mixing fragrant edible powder, vegetal granular powder, a binding agent and a swelling agent via a solution, squeezing for granulation and microwave drying; the prepared fragrance enhanced granular additive for the filter sticks is added in the filter sticks of cigarettes to enhance fragrance and lower tar content in smoke; the fragrance enhanced granular additive is few in add amount and great in tar content lowering; specific composite fragrance is provided with the cigarettes are smoked, and more abundant experience in taste and smell is brought to smokers. In addition, the preparation method of the fragrance enhanced granular additive for the filter sticks is simple and low in production cost, and industrial production can be realized.

The invention discloses a making method of frozen dried bean curd, which aims to provide a frozen dried bean curd with a long quality guarantee period and good taste. The method adopts a technical scheme of performing freeze-drying treatment on bean curd. The method comprises the following steps of: (1) freezing bean curd; (2) squeezing water in the frozen bean curd; (3) drying the bean curd the water of which is squeezed; and (4) cutting the dried bean curd into small dried bean curd pieces, and sealing and packaging the dried bean curd pieces. The method with the technical scheme is simple to operate; and the frozen dried bean curd has a good taste, a long quality guarantee period and a health-care effect.

The invention provides a method for preparing a porous adsorption material by using microwave low-temperature pore-forming activated granular red mud. The method comprises the following steps: taking a bonding agent which is 2-10 percent of mass of the red mud, uniformly mixing red mud wastes and the bonding agent, kneading into grains by using a granulator or by a hand and activating the red mud grains for 5-30 minutes at an activation temperature of 80-500 DEG C by utilizing microwaves to obtain the porous adsorption material. The red mud is activated by utilizing the selective heating and resonant sintering effects of the microwaves on iron and other matters in the red mud. The porous adsorption material prepared by the method has a pore volume of more than 0.0826 ml / g and a specific surface area of 18.62-24.25 m2 / g, and the grain size can be different as required. The produced porous adsorption material has the characteristics of fine grain, high porosity, large surface area, strong hydroscopicity, good temperature-resistant stability and low cost and has the great advantage in aspect of wastewater adsorption and treatment.

The present invention relates to electrode material preparing technology, and is especially process of preparing nanometer nickel oxide electrode for super capacitor. The technological process includes the following steps: 1. compounding water solution A of nickel salt containing polyglycol as the protecting agent and water solution B of sodium hydroxide containing ammonia; 2. adding the solution B into the solution A at 50 deg.C through magnetic stirring for 2 hr to produce precipitant, suction filtering, washing and stoving the precipitant, and calcining at 400-500 deg.C for 4-5 hr to obtain nanometer nickel hydroxide; and 3. mixing the nanometer nickel hydroxide with organic adhesive in the weight ratio of 4-9, mixing in a ball mill, hot pressing at 150 deg.C and 300 MPa for 10-20 min, and final carbonizing at 850 deg.C to obtain nanometer nickel oxide electrode.

The invention discloses an emission reduction method of nitrous oxide during composting. The emission reduction method comprises the steps that biomass charcoal serves as a nitrous oxide adsorbent; 20-40kg biomass charcoal is used for a composting raw material per ton and is added for two times; at the first time, 10-20kg biomass charcoal and the composting raw material are sufficiently mixed and placed in a composting tank to keep the water content and carbon nitrogen ratio of a composting initial material to be 60-70% and 20-25 respectively in a composting initial material stacking period; at the second time, 10-20kg biomass charcoal is added at 15th-18th day of the composting; a windrow composting technology is adopted in the whole composting process; pile turning is conducted manually or mechanically intermittently; the whole compost fermentation period is 30-45 days; and the fermentation temperature is higher than 60 DEG C in at least 8 consecutive days. The emission reduction method has the advantages of simplicity in operation, low cost, no secondary pollution caused by a production technology, and the like, and is applied to the animal manure composting, and has a very important practical significance in emission reduction, regulation and control of N2O during the composting.

The invention discloses a preparation method of a cathode functional interlayer applied to a lithium-sulfur battery. The preparation method comprises the following steps: S1, preparation of a polyacrylonitrile membrane by electrostatic spinning: polyacrylonitrile powder and N,N-dimethyl formamide are mixed, the materials are sealed and stirred till a transparent uniform solution is obtained, and electrostatic spinning is used for preparing polyacrylonitrile fibre; S2, pretreatment of the static spinning PAN membrane; S3, carbonization treatment: the electrostatic spinning PAN membrane which istreated by heat treatment in advance in S2 is carbonized. The material can be applied to a functional interlayer, and the material is placed between the cathode and the diaphragm in order to play aneffect for physically or chemically fixing shuttle of polysulfide and improving utilization rate of cathode active substances. In the charge and discharge process, the product is good for reducing polarization phenomenon of electrodes in the electrochemistry process, so that volume expansion problem of electrode materials is effectively alleviated, circulating performance of the electrodes is improved, and electrochemical performance of the lithium-sulfur battery is furthermore enhanced.

The invention relates to a preparation method for a spirogyra-based biomass carbon material / nanometer sulfur composite material. The method comprises the following steps of washing and drying spirogyra, heating the washed and dried spirogyra in a vacuum tubular furnace, carrying out heat preservation and carbonization at 500-900 DEG C, mixing the carbonized spirogyra with nanometer sulfur with ultrasound, carrying out ball milling, drying the ball-milled mixture by an air blow drying box, heating the dried mixture in the vacuum tubular furnace, carrying out heat preservation for 3-6 hours at 100-200 DEG C, and afterwards cooling the mixture subjected to heat preservation to a room temperature with the furnace to obtain the target product, namely the spirogyra-based biomass carbon / nanometer sulfur composite material. According to the preparation method, the spirogyra is taken as a precursor for the first time, and a biomass carbon material with a continuous sheet-shaped structure similar to graphene and with nanoscale thickness is synthesized; the biomass carbon material comprises the sheet-shaped structure composed of continuous fibers, also is provided with nanoscale pores and is high in uniformity and continuity, the loading of sulfur particles is facilitated, and the obtained composite material has favorably electrochemical performance.

The invention discloses a three-dimensional fiber-based composite aerogel type adsorbent preparation method. According to the method, cellulosic fiber, chitosan and sodium alginate which generally exist in natural world are utilized as raw materials. The method comprises the steps: firstly, utilizing periodate and metaphosphoric acid to sequentially chemically modify the cellulosic fiber; then crosslinking the modified cellulosic fiber with the chitosan; then compounding with the sodium alginate; freeze drying to obtain a three-dimensional fiber-based composite aerogel type adsorbent. The prepared adsorbent disclosed by the invention has high safe stability, has a good adsorption effect on negative ion pollutants and positive ion pollutants and can be applied to purifying heavy metal ion wastewater and dyestuff wastewater; in addition, the cellulosic fiber added into the adsorbent disclosed by the invention not only can serve as a framework and a reinforcing material, but also can be crosslinked with the chitosan to improve compression strength, morphology and structural stability of the whole aerogel adsorbent; thus, the adsorbent can be repeatedly used for many times, and the characteristics of rice inner holes and large specific surface area of the aerogel are fully played.

The invention discloses a foam copper-supported porous copper oxide nanowire composite material. The material comprises a foam copper substrate and a copper oxide nanowire supported on the surface, wherein the copper oxide nanowires are 8 to 12 mum in lengths, and are 150 to 250 nanometers in widths; the nanowires do not crack or fall easily; microscopically, the nanowires have porous structures, and pore diameters are 2 to 4 nanometers; macroscopically, the nanowires are distributed radially, and every 60 to 150 nanowires constitute a copper oxide micro-flower. The obtained composite material has a multi-grade and porous structure, and the whole three-dimensional structure is rich in apertures which are suitable for the permission of light rays and ion transport. When the composite material is taken as a photocatalytic degradation organic dye, the degradation efficiency can be increased by over 10 times; when the composite material is taken as a negative electrode material of a lithium ion battery, the capacity retention ratio can be increased by over 30 percent.

The invention discloses a special controllable slow-release organic fertilizer for rice. The organic fertilizer is prepared from raw materials in parts by weight as follows: 5-6 parts of ocher, 55-65 parts of cow dung, 3-4 parts of calamine, 2-3 parts of urea, 3-4 parts of zinc sulfate, 15-25 parts of kaolin, 6-8 parts of hydrilla varticillata powder, 3-4 parts of spodumene powder, 4-5 parts of ammonium dihydrogen phosphate, 2-3 parts of potassium persulfate, 10-12 parts of straw stalk, 5-6 parts of soybean oil residues, 3-4 parts of illite powder, 8-10 parts of sawdust, 20-30 parts of a soil conditioner, 4-5 parts of an EM agent and a proper amount of water. According to the fertilizer, the cow dung is taken as a main raw material, and slow release of the fertilizer is controlled accurately through strict control on particle sizes of fertilizer granules, so that the requirement of the rice for the fertilizer in different growth periods is met; meanwhile, multiple highly-absorbent raw materials in the raw materials are used, so that pesticide residues and heavy metal pollution in soil can be eliminated, and the foundation is laid for the green and ecological agriculture.

The invention discloses a compound concrete expanding agent. The compound concrete expanding agent is prepared by using the following components in parts by weight: 15 to 20 parts of calcium aluminosilicate, 25 to 30 parts of calcium sulphoaluminate, 20 to 30 parts of sulfur fixation waste residue, 10 to 20 parts of red mud, 10 to 15 parts of lithium slag, 4 to 8 parts of modified calcium oxide, 3 to 6 parts of magnesium oxide, 5 to 8 parts of methyl sodium silicate, 0.1 to 0.3 part of azodicarbonamide, 0.4 to 0.7 part of sodium tripolyphosphate, 2 to 4 parts of lauryl sodium sulfate, 0.3 to 0.6 part of ethylene-acrylic acid copolymer, 0.7 to 0.9 part of polycarboxylate superplasticizer and 0.5 to 0.7 part of nano calcium carbonate. The compound concrete expanding agent has the advantages of high strength, good compensation capability, calcium oxide reaction regulation and the like, and is a concrete additive which has a great development prospect.

The invention discloses a method for preparing an artificial vesuvianite building block from Bayer red mud. The method for preparing the artificial vesuvianite building block from Bayer red mud comprises the following steps of carrying out milling and slurrying of Bayer red mud, carrying out mixing and blank preparation, carrying out drying and sintering, and carrying out cooling. The method for preparing the artificial vesuvianite building block from Bayer red mud has a low investment cost and simple processes, realizes the preparation of the artificial vesuvianite building block which is a novel artificial non-metallic porous material vesuvianite building block, and provides a novel and reliable approach for Bayer red mud comprehensive utilization. Because of addition of fine coal powder, a leavening agent, a foaming agent and a molding binder in ingredients, a sintered blank has regular or irregular micro-apertures, small apertures and big apertures thereby forming the artificial vesuvianite building block which is a sponge-like ceramic building product. The artificial vesuvianite building block can absorb sound, reduce noise, improve a hearing environment, adjust air humidity by its unique breathing function and improve an ecological environment. Therefore, the artificial vesuvianite building block can be widely utilized for masonry building, floor building and wall decoration, and is an ideal, eco-friendly and energy-saving building and decorative material.

Mud core moulding sand for casting is prepared by the following raw materials including, by weight, 200-240 parts of quartz sand, 30-35 parts of attapulgite, 50-55 parts of perlite, 30-35 parts of sepiolite, 12-17 parts of glass fibers, 30-40 parts of alumina, 2-3 parts of aminopropyltriethoxysilane, 10-12 parts of cellulose gum, 1-2 parts of stearoyl-rac-glycerol, 2-3 parts of epoxidized triglyceride and water in proper amount. By using quartz sand, attapulgite and perlite and through calcining, rich holes are provided, and air permeability is good; by combining with grinding of sepiolite, alumina, cellulose gum and the like, the moulding sand is enabled to have excellent cohesiveness, plasticity and thermal stability; by adding the glass fibers, strength of the moulding sand is enabled to be greatly improved. The mud core moulding sand for casting has the advantages of high dry and wet strength, good air permeability, low gas evolution, quickness in calcining and curing and low mud core scrappage.