106 results about "Pozzolana" patented technology

The invention provides dihydrate desulfurized gypsum.phosphorous gypsum without roasting, which is applied to the technical filed of solid waste resource utilization of generating plants and phosphate fertilizer plants and used for preparing water extrusion-resistant gypsum blocks with high strength. The dihydrate desulfurized gypsum.phosphorous gypsum without roasting comprises the following components by weight percent: 60-80% of desulfurized gypsu.phosphorous gypsum, 10-25% of pozzuolana active mineral material, 5-15% of activating material, 0.5-2% of coagulation accelerator, 0.2-1% of intensifier and 30-50% of light aggregate. The preparation method of the invention is as follows: carrying out vibration screening on subhumid original desulfurized gypsum.phosphorus gypsum, mixing and stirring with powder grinded active mineral material, exciting material, coagulation accelerator, reinforcing material, intensifier lightweight aggregate and proper amount of water, extruding and moulding, muggy maintaining and naturally maintaining. In comparison with the traditional methods of gypsum building blocks produced by sintered and cast beta-hemihydrate gypsum, the invention has higher intensity, lower breakage rate, better water-proof performance and higher coefficient of softening, is characterized by stable performance, low cost and easy popularization, and is uneasy to rot roots and crack, thus being applied to indoor separating walls and partitions.

The invention discloses a sintered water permeable brick with a smooth and mildew-proofing surface. The water permeable brick is prepared from the following raw materials in parts by weight: 40-43 parts of sludge of a sewage plant, 6-7 parts of rice husks, 4-5 parts of potassium feldspar powder, 5-6 parts of pulverized fuel ash, 3-4 parts of bamboo powder, 8-10 parts of activated pozzolana, 19-21 parts of fluorite tailings, 4-5 parts of noan-silicon carbide, 2-3 parts of sodium carboxymethyl cellulose and 3-4 parts of light magnesium oxide. According to the sintered water permeable brick, the fluorite tailings, palm fibers, nano-silicon carbide and other ingredients are added to serve as aggregate ingredients of a brick blank, so that the tensile strength and crack resistance of a brick body can be enhanced, and the porosity of the brick body is further improved; the bamboo powder added into the brick is turned into a bamboo charcoal ingredient by means of sintering, so that the water permeable brick has excellent antibacterial and mildew-proofing effect. The manufactured water permeable brick has an attractive appearance and smooth surface, and integrates strength, water permeability and corrosion resistance into a whole.

The invention discloses magnesium sulphoaluminate cement, which is characterized by comprising the following raw materials in parts by weight: 90-110 parts of light burned magnesium oxide, 45-55 parts of composite sulfate, 25-30 parts of active aluminum sesquioxide, 30-35 parts of active silicon dioxide, 1.0-1.7 pats of phosphoric acid or phosphate and 65-75 parts of water. The magnesium sulphoaluminate cement has the advantages that: no magnesium chloride participates in reaction; and the defects of scumming, metal corrosion and the like of magnesium oxy-chloride cement are avoided. The magnesium sulphoaluminate cement comprises a pozzolanic material containing the active aluminum sesquioxide and the active silicon dioxide; and since the reaction of pozzolana and the structure of a resultant are stable, the service life of a product is long.

A disclosed cement-containing asbestos-free brake disc comprises the raw materials in percent by weight: 14-18% of modified phenolic resin, 28-33% of a fiber material, 40-50% of a filling material and 3-9% of cement, wherein the fiber material is composed of one or more of mineral fiber, glass fiber and paper fiber, cement is composed of one or more of portland cement, ordinary portland cement, slag portland cement, portland-pozzolana cement, portland fly-ash cement, composite portland cement, medium-heat portland cement, low-heat portland slag cement and white portland cement. The invention also discloses a preparation method of the cement-containing asbestos-free brake disc. The cement-containing asbestos-free brake disc is high in impact strength and good in high-temperature wear resistance; and the preparation method of the cement-containing asbestos-free brake disc is simple and relatively low in cost.

The invention discloses a preparation method of a pozzolana mixture. The mixture is prepared by mixing smashed shale with kiln-discharging clinker at a weight part ratio of (3-5):20, roasting and then cooling. The preparation method has the beneficial effects that under the condition that any heat source is not added, crude shale is evenly added to a clinker feeding point of a firing system through simple smashing, weighing and transporting devices; roasting is carried out by utilizing the waste heat of the clinker to prepare the shale mixture, so that the shale mixture completely reaches the characteristic of the pozzolana mixture. The preparation method has the beneficial effects that: a, any environment pollution is not generated; b, energy sources such as coal and the like are not consumed; c, the local shale resources are fully utilized; d, a yield regulation space is large; and e, the price difference of the preparation method in the invention and other methods for preparing the pozzolana shale mixture is at least ***, if being calculated by being based on a cement production line with a 100 Mtpa production capability, 12-18 Mtpa of mixtures can be produced in one year, and the profit is ***-***.

The invention discloses a waterproof coating for water conservancy construction. The waterproof coating for the water conservancy construction is characterized by comprising a first layer, a second layer and a third layer from inside to inside, wherein the first layer is made of a fiber-reinforced brittle composite material; manufacturing raw materials of the fiber-reinforced brittle composite material comprise Portland cement, silica sand, coal ash, water, water reducing agents, polyving akohol fibers and steel fibers; the second layer is made of epoxy-group and phenyl-group silicon resin; the third layer is made of the waterproof coating; manufacturing raw materials of the waterproof coating comprise bitumen, pozzolana cement, titanium nitride, calcium carbonate powder, water, dihydric alcohol reducing agents and epoxy emulsion; the thickness of the first layer is 2-3 millimeters; the thickness of the second layer is 1-1.2 millimeters; and the thickness of the third layer is 1.5-2 millimeters. The waterproof coating for the water conservancy construction is high in waterproof effect, can be adhered to concrete well, and is high in high-temperature resistance, high in impact resistance, high in crack resistance and high in friction resistance.

The invention discloses a front and rear end-mounted compaction wheel device for a road roller and an operation method thereof. The device comprises a wheel body I, a wheel body II and a vehicle body, wherein the wheel body II is positioned in the front part of the vehicle body; the wheel body I is positioned in the rear part of the vehicle body; the wheel body I and the wheel body II are respectively provided with a pair of compaction wheel frames; the bottoms of the compaction wheel frames corresponding to the wheel body I are provided with lifting wheels; each of the wheel body I and the wheel body II is made of 25% of gravel, 15% of limestone, 20% of cement, 5% of inorganic cementing material, 0.5% of hydroxypropyl methyl cellulose, 1.5% of ground calcium carbonate, 2% of polyethylene fiber, 1% of rubber powder, 7% of kaolin powder, 3% of water, 10% of aggregate and 10% of asphalt; and the particle size of the gravel is greater than 1.7mm, and the cement is portland-pozzolana cement. The compaction wheel device for the road roller has the advantages that the structure is novel, workers in an operation room can know the flatness condition of the pavement in real time, agglomerated dirt can be avoided, and the flatness is high.

The invention discloses cement produced by virtue of waste sintered brick powder and a production method for the cement. The cement is prepared from the following components in parts by weight: 45.5 to 67 parts of Portland cement clinker, 20 to 60 parts of waste sintered brick powder and 3 to 4.5 parts of gypsum. According to the cement and the production method for the same, Portland-pozzolana cement is produced by virtue of the waste sintered brick powder as an artificial pozzolana mixture instead of burnt clay, burnt shale and broken clay bricks, so that the technical problems of environmental pollution and resource waste caused by the waste sintered brick powder produced in a construction waste recycling process are effectively solved, a new manner for recycling the waste sintered brick powder is provided, natural clay and shale resources are also saved, energy consumption in sintering processes of the burnt clay, the burnt shale and the broken clay bricks is reduced, the production cost of the cement is greatly reduced, requirements of cities on cement are met, reclamation of construction waste is realized, a novel technology for a sustainable development strategy is provided, and the cement and the production method for the same are consistent with the policies of resource saving and environmental protection.

The invention discloses a biological carrier for strengthening wastewater treatment, a preparation method and application thereof, and belongs to the technical field of environmental functional materials and sewage treatment. The biological carrier comprises any four or more of: 10-70 parts of diatomite, 10-30 parts of bentonite, 5-9 parts of attapulgite, 30-40 parts of montmorillonite, 9-14 parts of fly ash, 4-9 parts of medical stone, 20-35 parts of activated carbon, 5-10 parts of dolomite, 3-8 parts of volcanic ash, 9-15 parts of sepiolite, 30-40 parts of illite, 5-10 parts of kaolin, 40-70 parts of zeolite and 35-45 parts of quartz sand. The volume load of wastewater biological treatment is increased, so that the microbial concentration of biological flocs in biochemical water treatment is remarkably increased, meanwhile, the removal rate of refractory organic matters or TOC is increased, the removal rate of inorganic matters is increased, and the effluent quality is improved.

The invention discloses a method for detecting trace elements in silicate materials, which is simple and is strong in operability. The detection method comprises the steps of: (1) preparing a sample to be detected; (2) determining EDTA influence factors; and (3) determining the contents of metal elements such as iron, magnesium, calcium or aluminium. The detection method provided by the invention comprises the step of detecting an iron element, a magnesium element, calcium element and an aluminium element. The detection method disclosed by the invention has the advantages that fast and simple detection for trace metal elements such as iron, magnesium, calcium and aluminium in primary coal ash, blast-furnace slag, volcanic ash and the like, less detection devices are used and the cost is low.

An activated pozzolan composition includes a fine interground particulate blend of an initially unactivated natural pozzolan and a supplementary cementitious material (SCM) different than the initially unactivated natural pozzolan. The initially unactivated natural pozzolan may include volcanic ash or other natural pozzolanic deposit having a moisture content of at least 3%, and the activated pozzolan composition can have a moisture content less than 0.5%. The initially unactivated natural pozzolan may have a particle size less than 1 mm before intergrinding with the SCM. The SCM used to activate the initially unactivated natural pozzolan can be initially coarse or granular with a size greater than 1-3 micrometers and may include granulated blast furnace slag, steel slag, other metallurgical slag, pumice, limestone, fine aggregate, shale, tuff, trass, geologic material, waste glass, glass shards, basalt, sinters, ceramics, recycled bricks, recycled concrete, refractory materials, other waste industrial products, sand, or natural mineral.

The invention provides a flue gas desulfurizing agent as well as a preparation method and application thereof. The flue gas desulfurizing agent comprises the following raw materials in parts by weight: 30-60 parts of slaked lime powder, 20-60 parts of silica fume, 6-24 parts of a binder and 6-15 parts of crystalline hydrated salt. According to the flue gas desulfurizing agent, active substances inthe slaked lime powder and the silica fume are subjected to a pozzolanic reaction to generate high-strength hydrated silicate; the binder can bind all the raw material components to improve the strength of the flue gas desulfurizing agent; the crystalline hydrated salt plays a pore-forming role by losing crystalline water in the flue gas desulfurizing agent; mutual cooperation of components, theflue gas desulfurizing agent has relatively small stacking density (0.5-0.8 g/cm<3>), relatively high radial crushing strength (120-280 N/cm) and relatively large porosity (40-65%); the desulfurizingagent can be used for a fixed bed reactor or a moving bed reactor, is suitable for purification treatment of SO2-containing industrial flue gas or waste gas at 20-330 DEG C, has relatively high reaction activity, particularly still has relatively high crushing resistance under a relatively high flue gas temperature condition, and is not easy to pulverize and low in bed pressure.

The invention discloses an inorganic foaming refractory door core board and a preparation method thereof, and relates to the technical field of production of door core boards. The door core board is prepared from portland-pozzolana cement, anhydrous magnesium sulfate, expanded graphite, zeolite powder, modified attapulgite clay, organic silicone emulsion, modified basalt fibers, polypropylene fibers, sodium borohydride, polyvinyl acetate, foaming agent, water reducing agent and early strength agent. According to the preparation method, the raw materials are subjected to even mixing, injectionmolding, solidification and the like to obtain the door core board. The door core board has the advantages of being environmentally friendly, high in strength and fireproof grade, excellent in corrosion resistance, capable of preventing dampness, high in stability, wide in application range and long in service life.

The invention provides a curing agent for solid waste treatment. The curing agent comprises the following components in parts by mass: 60-90 parts of high-calcium fly ash, 6-14 parts of desulfurized gypsum, 5-9 parts of volcanic ash, 1-5 parts of bentonite, 1-5 parts of calcium chloride and 1-3 parts of sodium sulfate. The curing agent for solid waste treatment provided by the invention has strongwater absorptivity, and can be applied to practice to achieve the effect of curing oil field rock debris conveniently and efficiently at low cost. Not only the solid waste is effectively recycled, but also the problem that the solid waste of each large enterprise is difficult to treat is solved. The curing agent provided by the invention can realize rapid curing of slurry, and can reduce a large-capacity slurry storage pool. Heavy metal absorbing vegetation is planted and absorbed, a vegetation growth experiment is completed, and the method can be particularly applied to the aspects of drought resistance, severe saline-alkali soil remediation and the like. The ecological balance is protected, the human settlement environment is improved, and an effective promotion effect is achieved for the government to achieve the sustainable development goal.

The invention discloses a salt-tolerant water-retaining agent containing minerals. The water-retaining agent is prepared from the following components in parts by weight: 2 to 4 parts of polyacrylamide; 3 to 8 parts of sodium polyacrylate; 4 to 7 parts of potassium polyacrylate; 3.5 to 6 parts of ammonium polyacrylate; 3-8 parts of volcanic ash; 3-10 parts of clay, 2-6 parts of limestone, 1.5-6 parts of rare earth, 4-8 parts of plant straws, 6-12 parts of sawdust, 1.2-1.5 parts of lignin, 1-4 parts of resin adhesive, 1.2-4.3 parts of urea, 0.8-1.8 parts of manganese sulfate, 0.6-1.5 parts of mono-potassium phosphate, 1.7-3 parts of ferric sulfate and 1.1-3 parts of zinc sulfate. The water-retaining agent is rich in minerals, can be prepared into different concentrations to neutralize different alkali-salt lands, can fully retain water in the alkali-salt lands, and is simple in overall processing method and worthy of popularization.

The invention discloses an efficient albizia julibrissin seed coating material and a use method thereof, and relates to the technical field of albizia julibrissin coating materials. The coating material comprises organic matter yeast, peat, pozzolana, water soluble chitosan, shell powder, bread crumbs, sundew pulp, attapulgite, palm fiber, brassinolide, heteroauxin, a compound microelement nutrient solution, a water-retaining agent, a surfactant, plant extracts, a harmless adhesive and a plasticizer. The use method of the coating material includes the steps of mixing the raw materials, cleaning seeds, wrapping the seeds, drying the seeds and the like. The coating material is low in cost, convenient to use and environmentally friendly and can efficiently promote the germination and growth of the albizia julibrissin seeds, increase the survival rate and improve the germination quality.

The invention discloses a porous slow-release selenium fertilizer and a preparation method thereof. The preparation method of the porous slow-release selenium fertilizer comprises the following steps:mixing and ball-milling fly ash, phosphorus slag, glass, perlite, pumice powder, volcanic ash and potassium nitrate, transferring the obtained mixture into a foaming kiln, foaming the mixture, and pelleting the mixture to prepare a spherical open-cell foamed porous matrix; putting selenium-rich mineral powder, diammonium hydrogen phosphate and potassium silicate into a mixer, and performing mixing to obtain a selenium-rich fertilizer slurry; and mixing the foamed porous matrix with the selenium-rich fertilizer slurry, and granulating the obtained mixture to obtain the porous slow-release selenium fertilizer. The porous slow-release selenium fertilizer takes porous glass as a carrier, and the selenium-containing minerals are processed to prepare the porous fertilizer, so that the porous slow-release selenium fertilizer has a higher fertilizer efficiency than common fertilizers,, has the effects of slow release, water retention and ventilation, cannot be in large-area contact with surrounding soil, and is beneficial to keeping the looseness of the soil.

The invention discloses unfired ceramsite with sodium silicate-bonded sand dust and carbide slag as excitants and preparation of the unfired ceramsite, and belongs to the technical field of solid waste and hazardous waste resource recycling. The unfired ceramsite disclosed by the invention comprises the following components: 10%-50% of sodium silicate sand dust, 4%-15% of carbide slag and the balance of a material with volcanic ash activity. The preparation method comprises the following steps: ball-milling the sodium silicate sand dust and the dried carbide slag together, mixing the ball-milled powder with the fly ash, the mineral powder, the red mud and other materials with volcanic ash activity, uniformly stirring to obtain mixed powder, then carrying out ball rolling molding by using a ball rolling machine to prepare a ceramsite blank, and standing and curing to obtain the medium-high strength unfired ceramsite with good performance. According to the invention, the sodium silicate sand dust and the carbide slag are used as excitants to replace an alkali activator which is high in price and used in the traditional unfired ceramsite, so that the preparation cost of the unfired ceramsite is greatly reduced, and the unfired ceramsite with relatively high economic benefits is obtained.