56 results about "Gypsum" patented technology

The invention discloses a roadside proper yielding unequal combined filling structure of gob-side entry retaining and a construction method. An upper-layer filling body of the filling structure is accumulated by gangue bags; a mixture of water, cements and crashed gangues is filled in the gangue bag; a lower-layer filling body is a filling plaster wall; the filling plaster wall is formed by a mixture of water, cements, waste plasters, blast furnace slags, waste limes, coal ashes and gangue powders. By adjusting the filling height and the preparation proportion of the two filling bodies, the structure provided by the invention can ensure the contractibilities of the filling bodies to be in a reasonable range, thus the filling bodies can better adapt to the movement rule of the hard roof strata and guarantee the stability of the gob-side entry retaining.

The invention essentially relates to a filter material for treating sewage, in particular to relate to a filtering material used in the sewage process technique of aeration biology filtering pool. The filtering material of sewage process of the aeration biology filtering pool is characterized in that the components of the raw material of the filtering material consists of by fly ash of 60 to 75 percent, portland cement of 10-20 percent, quick lime of 10-20 percent, gypsum 3-5 percent and degreasing aluminum powder of 0.06-0.08 percent. The preparation includes the following steps of pulping, stirring, pouring, cutting forming and ball milling. Under the optimal proportion of the air and water and the optimal water force load, the life sewage is treated by the aeration biology filtering pool with adding the fly ash to the gas concrete particle. When the average concentration of the water inlet is 176mg/L, the average removal rate of the CODis 75.3 percent, the average concentration of water inlet is 42.7mg/L, the average removal rate of the NH3-N is 96.4 percent, the average concentration of the water outlet is 0.87mg/L which meets the GB18918-2002 grade A standard of the sewage discharging.

The invention discloses a modified phosphogypsum highway subgrade filler and a preparation method thereof. The method comprises the following steps: aging phosphogypsum for more than 5 days to obtain a material A; calcining the material A at 160-200 DEG C for 1.5-2.5 hours to obtain a material B, and naturally cooling the material B; uniformly mixing 91-93 wt% of the material A and 7-9 wt% of the material B to obtain a material C; and adding water, which accounts for 12-16 wt% of the material C, into the material C, and stirring uniformly to obtain the modified phosphogypsum highway subgrade filler. The phosphogypsum is calcined at controlled temperature for controlled time according to the chemical characteristics of the calcined phosphogypsum to obtain the modifier, thereby enhancing the gelation property in the phosphogypsum, improving the stability and water resistance of the internal structure and obtaining the subgrade filler satisfying the highway engineering requirements. The modified phosphogypsum highway subgrade filler effectively solves the problem that the existing phosphogypsum is restricted to the local doping materials and is low in consumption.

The invention provides a selenium-enriched mushroom grass culture medium which is prepared by taking selenium-enriched mushroom grass, wood chips, wheat bran, saccharose, gypsum, monopotassium phosphate and magnesium sulfate as the main raw materials. The invention further provides a method for producing shiitake mushrooms through the selenium-enriched mushroom grass culture medium. Accordingly, a traditional shiitake mushroom producing method is changed, a selenium-enriched mushroom grass technology is utilized in shiitake mushroom stick production, therefore, the producing method of selenium-enriched products is changed, the nutritional value of the shiitake mushrooms is increased, the production efficiency is improved, the shiitake mushroom yield and biotransformation rate are high, and meanwhile the production cost is greatly lowered; in addition, the producing method is simple in technology, the produced shiitake mushrooms are high in content of selenium-enriched elements, the product is free of pollution, and the food safety problem is solved from the source.

The invention discloses heat-insulating plastering gypsum for a building interior wall and a preparation method thereof and relates to the technical field of plastering gypsum. The heat-insulating plastering gypsum comprises 55-75 parts of desulfurized gypsum, 20-30 parts of natural gypsum, 15-20 parts of cement, 15-20 parts of heat-insulating filler, 10-15 parts of modified heavy calcium carbonate, 10-15 parts of plant source additive, 5-10 parts of rubber powder, 5-10 parts of modified expandable graphite and 7-12 parts of auxiliary. The preparation method includes: pretreating the natural gypsum. The heat-insulating plastering gypsum is used for being brushed on the building interior wall, is excellent in heat-insulating performance and has high adhesiveness, and a coating is free of shrinking and cracking and less prone to shedding.

The invention discloses a shock-absorption expansion filling material used for filling a deep goaf and a preparation method in order to solve the problem that filling cannot realize roof contact after the underground goaf is filled with a conventional filling material. The shock-absorption expansion filling material is composed of a base material and other material, and the base material comprises, in percent by mass, 53.60%-64.89% of mine tailings, 7.44%-14.60% of a gelling material, and the balance water. The other material is prepared from the following raw materials in percent by mass: 3.75%-8.75% of hydrogen peroxide, 2.00%-6.00% of a stabilizing material, 8.00%-12.00% of calcium sulphoaluminate, 1.00%-3.00% of a retarding material, and 2.00%-4.00% of gypsum. The preparation method comprises selection of the materials, proportioning of the ingredients, molding and molding maintenance. Because of the special pore structure, the shock-absorption expansion filling material possesses the advantages of obvious shock absorption performance, relatively good fluidity, excellent expansion performance and the like, and is especially applicable to filling of the metal mineral deep goaf.

The invention provides a detachable full-concealed installation structure for gypsum ceilings and an installation method. The structure comprises aluminum alloy main keels, paint-dried triangular keels, aluminum alloy inlaid strips and the gypsum ceilings. The two opposite sides, provided with back ribs, of each gypsum ceiling are provided with installation grooves respectively. The cross sections of the aluminum alloy inlaid strips are each in a right-angle shape. The transverse right-angle edges of the aluminum alloy inlaid strips and the installation grooves of the gypsum ceilings are assembled and connected. Arc-shaped installation grooves are formed in the vertical right-angle edges of the aluminum alloy inlaid strips. The upper ends of the vertical right-angle edges are each in a wedge shape. The paint-dried triangular keels are assembled on the lower portions of the aluminum alloy main keels through installation holes. The lower ends of every two adjacent paint-dried triangular keels are assembled together with and connected with the arc-shaped installation grooves of the aluminum alloy inlaid strips on the two opposite sides of the corresponding gypsum ceiling respectively. The invention further provides the installation method of the detachable full-concealed installation structure for the gypsum ceilings. The aims of detachable full-concealed installation can be achieved, the installation effect is better, and the requirement for market development can be better met.

The invention discloses a comprehensive utilization treating method for aeroconcrete waste materials. Firstly, drying the aeroconcrete waste materials, then mixing the aeroconcrete waste material with anhydrite or dihydrate gypsum according to a certain mass percentage ratio after calcining, grinding the mixture in a ball mill to prepare an expansive agent, evenly mixing the expansive agent with silicate cement to prepare expansive cement, calcining the aeroconcrete waste materials in high temperature, grinding the waste materials in the ball mill into a powder lot with specific surface area of 300-400g/cm2, thereby obtaining gelled materials, using the powderlot quantity of 50-150kg per cubic meter as fillers to replace lime or dense concrete filled with lime. The treating method of the invention has the advantages of simple technology, no secondary pollution, being applicable for commercial process, making more full use of aeroconcrete waste materials, and changing waste into valuable.

The present invention relates to a method for preparing tungsten oxide and tungsten powder from scheelite. The method uses the scheelite as a raw material and comprises the following steps: (1) conducting leaching reaction; (2) conducting filtering and washing; (3) conducting hydrogen peroxide extraction-decomposition to extract tungsten; (4) conducting hydrogen peroxide multiple dissolution-decomposition to purify tungstic acid; (5) pure tungstic acid calcination to prepare tungsten trioxide; and (6) conducting peroxotungstic acid solution spraying pyrolysis to prepare tungsten oxide and tungsten powder. The method only consumes cheap and easily available sulfuric acid, greatly reduces the decomposition cost of the scheelite and uses sulfuric acid to decompose; decomposed residues are gypsum; the gypsum can be used as building materials; the method does not produce dangerous waste alkali cooking residues, greatly reduces production and operation costs of enterprises, uses hydrogen peroxide as an extractant of tungstic acid, does not produce ammonia nitrogen wastewater, eliminates the technology of producing the ammonia nitrogen wastewater for many years in tungsten smelting, greatly reduces environmental protection costs, directly produces various tungsten end products and tungsten powder, and improves added value of products of the tungsten smelting enterprises.

The present invention relates to an air-entrained concrete block and its manufacturing method, comprising cement, lime, polypropylene fiber and other components including one of fly ash, sand, gypsum, aluminum powder and waste slurry species or several. By optimizing the ingredients and process parameters of air-entrained concrete, the obtained air-entrained concrete blocks have the advantages of high strength, low shrinkage and crack prevention. At the same time, modified polypropylene fibers can improve the tensile strength of concrete structural materials, Impact strength, reduce the drying shrinkage value of concrete structural materials and prevent the formation and expansion of cracks during cement curing.

To provide a cement manufacturing apparatus and the like capable of increasing quantity of fly ash used in the apparatus while controlling unburned carbon content in cement within a permissible range. The cement manufacturing apparatus and the like comprises a removal means for removing unburned carbon from gypsum, and a grinding means for grinding gypsum from which unburned carbon is removed by the removal means together with clinker to generate cement. With the apparatus, total unburned carbon content in cement can be reduced, and the quantity of fly ash used in the apparatus can be increased by the reduced amount of unburned carbon. The removal means can remove unburned carbon contained in gypsum as well as unburned carbon contained in fly ash, and the grinding means may grind the fly ash from which unburned carbon is removed together with the gypsum, from which unburned carbon is removed, and clinker. The removal means may simultaneously remove unburned carbon contained in gypsum and unburned carbon contained in fly ash.

The invention discloses a concrete expansive agent, which belongs to the technical field of concrete additives. The concrete expansive agent comprises the following raw materials in parts by weight: 20-30 parts of coal ash, 5-15 parts of gypsum powder, 5-15 parts of alumstone, 2-6 parts of aluminum oxygen chamotte, 10-30 parts of calcium sulphoaluminate, 4-12 parts of aluminum slag, 1-5 parts of calcium carbonate powder, 4-12 parts of nano aluminum titanate fiber, 8-16 parts of rosin rock ore sand, 5-15 parts of vermiculite power, 2-6 parts of polypropylene fiber, 3-9 parts of cellulose acetate butyrate, and 3-12 parts of triethanolamine. The concrete expansive agent is high in expansion rate and low in alkalinity, is capable of improving the property of concrete, preventing the concrete from cracking, meanwhile reducing leakage and improving strength, and is low in price, simple in production process, low in cost, and suitable for large-scale production.

The invention provides a sulfur-containing composite microbial fertilizer. The sulfur-containing composite microbial fertilizer comprises following ingredients, by mass, 3 to 30% of phosphogypsum, 1 to 10% of a composite microbial agent, no more than 35% of water, and no less than 6% of a total nutrient (N+P2O5+K2O). The composite microbial agent is prepared by mixing bacillus megaterium and thiobacillus thiooxidans microbial agents which are processed by fermentation and adsorption. The invention also provides a production method of the sulfur-containing composite microbial fertilizer. The production method comprises steps of treatment of phosphogypsum, preparation of the composite microbial agent, and preparation of the sulfur-containing composite microbial fertilizer. According to the production method, industrial production waste phosphogypsum is added as a fertilizer, so that the production method is beneficial for environmental protection, and is capable of solving a problem of waste accumulation for manufacturing enterprises, realizing reclamation of wastes, and meeting with the demands of sustainable development.

The invention relates to the technical field of environmental protection desulfurization, in particular relating to a method for improving quality of desulphurization gypsum in flue gas desulfurization process and a flue gas desulfurization system. A plurality of seriflux supersaturation detection devices and a plurality of stirring devices are evenly distributed on the periphery of the seriflux tank of the flue gas desulfurization system, the stirring device is driven by a stirring driving device which is controlled by a control device; the seriflux supersaturation detection devices detect the supersaturation of peripheral seriflux and output the detection results to the control device; the control device controls the stirring driving device to operate according to the seriflux supersaturation degree detected by the seriflux supersaturation detection devices; according to the seriflux supersaturation, corresponding stirring operation is carried out on seriflux, the supersaturation of each zone of seriflux in the seriflux tank is evenly kept within the metastable state of crystal grains, thereby reducing new core formation rate of gypsum, increasing crystallization growth driving power of existing tiny crystal grains, and improving the quality of gypsum.

The invention relates to the technical field of construction and building materials, in particular to photocatalytic concrete prepared with a phosphogypsum-based hydraulic composite binding material and a preparation method of the photocatalytic concrete. The photocatalytic concrete is prepared from phosphogypsum, slag powder, limestone powder, portland cement, broken glass slag, wind-blown sands,a foamer, a foam stabilizer, a water reducer and a photocatalytic organic adhesive. The photocatalytic concrete provided by the invention can be used to improve the indoor air pollution problem, particularly perform adsorption and degradation on harmful gas including formaldehyde, the improvement can be finished under the condition of natural illumination without more energies and operation steps, and the photocatalytic concrete has market value. The photocatalytic concrete is suitable for the field of indoor decorative materials including light wall body materials, gypsum wall body articlesand ceiling decorative plates.

The invention discloses an ephedra, almond gypsum and licorice granule pill. The ephedra, almond gypsum and licorice granule pill comprises a base pill (1) as the core, a medicine layer (2) obtained by mixing ephedra, almond gypsum and licorice granules, monoglyceride, hydroxy propyl methyl cellulose and acrylic resin, a coating layer (3) and a color coating layer (4), wherein the base pill (1) is coated with the medicine layer (2); the polymer slow-release coating layer (3) and the color coating layer (4) are sequentially coated layer by layer outwards. The invention solves the problems that ephedra, almond gypsum and licorice granules are short in half-life period and more frequent in administration, and makes up the shortfall in the prior art.

The invention provides an indoor soundproof haze-adsorbing panel. The indoor soundproof haze-adsorbing panel comprises a gypsum supporting plate, wherein a soundproof felt, a polyester fiber sound absorption plate and a Visher Kardson stone plate are sequentially arranged on one side of the gypsum supporting plate, wherein a plurality of grooves are formed in the reverse side of the gypsum supporting plate to enlarge the fit area when cement is used for adhesion; the gypsum supporting plate, the soundproof felt, the polyester fiber sound absorption plate and the Visher Kardson stone plate are adhered and connected. The indoor soundproof haze-adsorbing panel disclosed by the invention adopts the sound insulation and haze-adsorbing double design, can effectively reduce the external noise, and further effectively adsorb the PM 2.5 particles in the room; the indoor soundproof haze-absorbing panel can be cleaned by a common wet wipe, and is convenient to maintain and very suitable for ordinary families.

The invention discloses damp-proof light plastering gypsum capable of releasing negative oxygen ions, and a preparation method of the plastering gypsum. The plastering gypsum comprises the following components in parts by weight: 60-85 parts of a beta semi-hydrated gypsum component, 8-15 parts of a light aggregate component, 0-5 parts of a pH regulator component, 0.1-0.5 part of a water-retainingagent component, 0.01-0.1 part of a modifier component, 0.05-0.5 part of a waterproof agent component, 0.1-0.4 part of a retarder component, and 1-10 parts of a negative oxygen ion powder component. The plastering gypsum provided by the invention not only has all the properties of flame retardance, environmental protection, heat insulation, sound absorption, impact resistance and the like of traditional plastering gypsum, but also has the functions of moisture prevention and negative oxygen ion release.

The invention discloses a yellow wine yeast suitable for South Hunan Province taste, which is prepared from the following components in parts by weight: 80 parts of rice, 30 parts of wheat, 10 parts of corn, 30 parts of grain, 3 parts of honeysuckle flower, 3 parts of Lespedeza pilosa, 2 parts of mulberry leaf, 0.5 part of gypsum, 1 part of licorice root, 1 part of dried orange peel, 2 parts of cassia bark, 1 part of small fennel and 1 part of hemlock parsley. The yellow wine yeast is prepared as follows: (1) rice, wheat, corn and grain are mixed and grounded into powders; (2) the rest components are mixed and grounded into powders; (3) the above two powders are mixed and added with water to be prepared as pills; (4) distiller's yeast is added with aged koji mold; (5) the mixture is placed on the straw for being cultured for 3 days, till full of mycelium; (6) the mixture is dried to obtain the yellow wine yeast. The yellow wine brewed by using the yeast disclosed by the invention has the advantages of favorable saccharification, quick fermentation and transparent wine body, reserves the flavor of the traditional yellow wine, is suitable for taste of people in South Hunan Province, and has abundant nutrition.

The invention relates to a combined-type fiber gridding rib layer product and a preparation method of the combined-type fiber gridding rib layer product. The combined-type fiber gridding rib layer product comprises a plurality of layers of fiber gridding cloth, the fiber gridding cloth is spliced by a sizing agent, and the plurality of layers of fiber gridding cloth is combined to the gridding rib layer in a stacked manner. The combined-type fiber gridding rib layer product is combined by adopting the plurality of layers of fiber gridding cloth, monofilament number and gridding density of sub-thread fiber bundle of the gridding rib layer are not limited by the fiber gridding cloth production process, reinforced density is greatly increased, the monofilament number of the sub-thread fiber bundle is reduced, the distribution uniformity of the ribs is improved, and the strength of a gypsum plaster board product and the levels of fire stability and fire endurance performance are effectively improved.

The invention discloses a fireproof door core. The fireproof door core is prepared from, by weight, 7-12 parts of light calcined magnesia, 20-35 parts of expanded perlite, 15-23 parts of bentonite, 13-21 parts of desulphurization gypsum, 4-8 parts of chopped fiber, 1-2 parts of foaming agent, 11-16 parts of fly ash, 4-8 parts of lignin, 0.5-1 part of expansible graphite, 0.2-0.4 part of zinc borate, 2-7 parts of modifier and an appropriate amount of water. The fireproof door core has the advantages of being excellent in fireproof performance, good in heat preservation performance, environmentally friendly and small in volume, and not generating toxic and harmful gas under fire.

The invention discloses a wave-absorbing breathable environment-friendly molding. The wave-absorbing breathable environment-friendly molding is prepared from the following raw materials in parts by weight: 5 to 9 parts of calcium borate, 55 to 65 parts of high-strength gypsum, 14 to 18 parts of fibrilia, 6 to 8 parts of polyester fiber, 10 to 16 parts of adsorbed filled earth, 1 to 2 parts of terbium oxide, 1 to 2 parts of iron oxide, 8 to 12 parts of inorganic filler, 10 to 14 parts of flame retardant additives and 12 to 18 parts of an adhesive. The wave-absorbing breathable environment-friendly molding disclosed by the invention has the excellent characteristics of good wave-absorbing effect, light quality, high mechanical strength, breathability and no cracking; in addition, the molding has the advantages of smooth surface, good toughness and impact resistance, the function of adsorbing harmful substances in the air, and relatively-excellent flame retardancy and dimensional stability; meanwhile, the preparation method disclosed by the invention has the advantages that the low cost of materials is relatively low raw materials are easy to obtain, and the process is simple; the molding for decoration has a relatively-high practical value and a good application prospect.

The invention discloses an orthopedic gypsum stirring device good in stirring effect in the technical field of medical orthopedic devices. The orthopedic gypsum stirring device comprises a supportingplate, supporting feet are arranged on the bottom of the supporting plate, the middle of the top of the supporting plate is rotationally provided with a rotary shaft, an outer cylinder is fixedly arranged on the top of the rotary shaft, and the bottom of the rotary shaft penetrates through the bottom of the supporting plate to be connected with a first motor. In the device, the design that a gypsum cylinder is separated from a stirring mechanism is adopted, after gypsum is stirred, the gypsum cylinder is directly taken out for use, and due to the design, the problems that in the prior art, feeding is difficult, and gypsum residues are difficult to process can be avoided. By arranging a hydraulic telescoping mechanism, lifting stirring of the gypsum can be achieved, and the rotatable outercylinder can drive retrograde rotation between the gypsum cylinder and a gate stirrer, so that the stirring process is more efficient, and gypsum powder is more sufficiently mixed with water; by arranging a cover plate and a cover plate connecting piece, the situation that gypsum liquid is splashed in the stirring process can be avoided.

The invention relates to the field of chemical industry, and particularly relates to a desulfurization additive as well as applications and a using method of the same. The desulfurization additive contains the following raw materials in parts by weight: 30-40 parts of accelerant, 50-60 parts of activator and 5-15 parts of catalyst. The desulfurization additive can be used in a wet-process flue gas desulfurization technology of limestone or limestone gypsum. The using method of the desulfurization additive comprises the steps of: adding the desulfurization additive in a circulation loop of a limestone wet-process desulfurization circulation system; stirring; and adding the desulfurization additive by a set frequency. The desulfurization additive is capable of enhancing the reaction rate of desulfurization.

The invention belongs to the technical field of alkali residue recycling and discloses a reutilization method for alkali-making waste residue liquid. The reutilization method for the alkali-making waste residue liquid comprises the following steps of 1, carrying out rotary liquid separation on the alkali-making waste residue liquid to obtain clear liquid and alkali residues; 2, washing the alkaliresidues with clear water and then drying the alkali residues for sale; 3, clarifying the clear liquid to obtain supernate and thick liquid at the bottom; 4, guiding the supernate out for injection well brine extraction; and 5, dividing the thick liquid at the bottom into dilute-base thick liquid and dry-base thick liquid, wherein the dilute-base thick liquid is used as a raw material for preparing gypsum by reacting with ammonium sulfate, or, serving as a raw material for brick making or desulfurizing agents, and the dry-base thick liquid is directly sent to an anti-seepage treatment site forbackfilling. The invention further discloses a reutilization system for the alkali-making waste residue liquid. The reutilization system comprises rotary liquid separators, a sand separator, a conveyor, a sand washer, a clarifying barrel, a washer and a filter press. According to the reutilization method for the alkali-making waste residue liquid and the system using the reutilization method, theindustrial alkali-making waste residue liquid is treated so that the external emission of solid wastes of enterprises can be reduced and the alkali residue products can be turned from waste into wealth for sale.