1291 results about "Clinker (cement)" patented technology

The present invention is sludge curing agent and its application, and belongs to the field of soil treating chemicals technology. The sludge curing agent includes powdered components and liquid components, the powdered components include cement clinker 30-60 weight portions, slag 30-60 weight portions, lime 3-8 weight portions, gypsum 1-7 weight portions and other sulfates 1-7 weight portions; and the liquid components include polyacrylamide 5-30 weight portions, polyaluminum chloride 0-20 weight portions, mannitol 0-30 weight portions, lignosulfonate 20-80 weight portions, lignosulfonate-iron or chromium ion complex 0-30 weight portions, alkylphenol ethoxylate 0.2-2 weight portions, tannin 0-10 weight portions, humate 0-10 weight portions, and alpa-olefin sulfonate 0.2-2.5 weight portions. The sludge curing agent has low cost, small consumption, high cumulate strength and high cumulate water tolerance, and may be applied widely.

Disclosed are a high-performance expansion cement clinker, a manufacturing method of the cement clinker, a series concrete expansion agent and a manufacturing method of the concrete expansion agent. The high-performance expansion cement clinker is made as follows: firstly, 50-90 wt% of limestone, 1-20 wt% of bauxite, 5-30 wt% of gypsum and 1-5 wt% of iron powder are grinded together into raw meal, then the raw meal is calcined at 1250-1400 DEG C in a rotary kiln, a tunnel kiln or a roller kiln to get the cement clinker. The cement clinker is milled alone or in combination with sulfur calcium aluminate cement clinker, calcium aluminate cement clinker, anhydrite, calcined gangue, alunite, calcined kaolin and hydration heat inhibiting additives until the specific surface area reaches 200-400m2/kg, so as to get the series concrete expansion agent. The high-performance expansion cement clinker disclosed in the invention is calcium hydroxide-hydrated calcium aluminate sulfate double-expansion source expansion clinker, which is fast in expansion rate and high in expansion efficiency and uses less bauxite of scarce resources; besides, the calcination temperature is low to avoid calcium oxide dead burning, so the preparation is safe and reliable.

Compositions and methods for increasing grinding efficiency of cement, cement clinker, raw materials for cement, and other inorganic particles. Use of biomass-derived polyols such as diols, triols, or mixtures thereof, optionally with a conventional grinding aid, cement quality improver, and/or hexavalent chromium reducer, are believed to provide less risk of sludging when compared to glycerides obtained from fossil fuel sources.

The invention discloses a chlorine-free powdery cement grinding aid suitable for fly ash, which comprises the following components in parts by weight: 0-5 parts of alkanolamine, 2-5 parts of polylol,15-75 parts of sulfate, 5-20 parts of acetate, 0-5 parts of lignosulphonate, 2-6 parts of carbohydrate organic matter, 5-25 parts of miltonite, 0-25 parts of carbamide and 5-50 parts of inorganic carrier material. The invention also discloses a preparation method of the chlorine-free powdery cement grinding aid suitable for the fly ash. A compound grinding aid can lower the cement cost and uses the fly ash for replacing partial clinker to save the clinker dosage by 10-15 percent on the premise of keeping the cement strength unchanged, and uses extra 10-15 parts of fly ash without increasing the required water amount of cement standard consistency; the cost of the cement per ton is lowered by more than 10 Yuan.

The invention discloses an alkali-activated high-performance water reducer and a preparation method thereof. The alkali-activated high-performance water reducer comprises a composite alkali-activator, a composite water reducer, black liquor of a paper mill, a composite retarder, a composite air entraining agent, a composite thickener, a composite regulator and the balance of water. The preparation method for the alkali-activated high-performance water reducer comprises the following steps of: adding the components and water to a reaction kettle in sequence; and mixing and carrying out a reaction on the components and the water under the room-temperature environment to obtain the finished product. The alkali-activated high-performance water reducer disclosed by the invention can activate the cementitious activity of the mixed materials such as slag, coal ash, gangue and the like, has excellent adaptability to different cements and highly doped concrete, and can greatly reduce the adding amount of cement clinker. The alkali-activated high-performance water reducer has the characteristics of a high water-reducing agent, good peaceability, a remarkable reinforcing effect, a good collapse preventing effect, adjustable setting time and the like. Moreover, the external additive has a simple production process, no pollution, low energy consumption and low cost, can solve an environmental pollution problem of the black liquor of the paper mill, and has good practicability.

The invention discloses sulphoaluminate maritime work cement and a preparation method thereof. The sulphoaluminate maritime work cement comprises the following main raw materials in parts by weight: 50-80 parts of cement clinker, 8.0-20 parts of anhydrite, 0-30 parts of limestone, 0-30 parts of slag, 0.1-0.5 part of water reducing agent, 0.001-0.005 part of air entraining agent, 0.1-0.5 part of retarder and 2-5 parts of silicon powder. The preparation method comprises the following steps of: respectively smashing, grinding and homogenizing the sulphoaluminate cement clinker, the anhydrite, the limestone and the slag; then, burdening at a ratio, and evenly mixing; adding the water reducing agent, the air entraining agent, the retarder and the silicon powder; and mixing and homogenizing to obtain the product. The concrete mixed by the sulphoaluminate maritime work cement has the advantages of small bleeding rate and high slurry viscidity. The slurry has strong covering and supporting action on aggregate. The concrete keeps good homogeneity and has the advantages of hard and quick early strength, continuously-increased later strength, good slurry structure compactness and high volume stability and is convenient to use and operate for constructing.

The invention concretely relates to a novel tailing consolidator which uses fine powder ground from blast furnace water quenching slag as a main raw material and a preparation method of the consolidator. The consolidator is characterized in that the consolidator comprises, by mass concentration, 9 % to 17.54% of portland cement clinker, 10% to 17.54% of anhydrite, 6% to 10% of quicklime, 0.2 to 6 thousandths of Na2SO4, 0.2 to 0.5 thousandths of carboxymethyl cellulose, 5% to 10% of coal ash and 43.65% to 69.96% of the fine powder ground from the blast furnace water quenching slag. Each above component is dried by a dryer, put in a mixer to be evenly stirred, and conveyed to a bowl mill by a belt conveyer to be ground. The blast furnace slag discharged from a smeltery is used as the main raw material in the invention to reduce the cost and solve slag processing, so the consolidator has the advantages of low production cost, simple processing, and agile and convenient usage. A usage amount of the consolidator in the present invention is half or less than the usage amount of common cement under the same conditions with the same backfilling intensity.

The invention relates to a cementing material of an oil shale clinker matrix polymer and a preparation method thereof, and belongs to the field of environment-friendly materials. The cementing material comprises the following components in percentage by weight: 30 to 70 percent of oil shale clinker with the particle diameter of 200 meshes, 0 to 70 percent of low-temperature calcined kaolin with particle diameter of 200 meshes, 0 to 10 percent of calcium lime with the fineness of 150 meshes, 5 to 30 percent of P32.5 cement, and 5 to 10 percent of exciting agent, wherein the exciting agent is a mixed solution of industrial sodium silicate of which modulus M is 3.3 and industrial alkali. The cementing material can replace the prior cementing material gypsum and cement, and is suitable for manufacturing stone imitated artworks, embossing wall bricks, sculptures and ground tiles for building decoration and products such as hollow bricks, light bricks, and the like for building materials. The cementing material has low cost and performance superior to the prior material.

The invention discloses a kind of minimum inflation high magnesium moderate heat cement, a production method therefor and applications thereof. The cement is prepared from calcium raw materials, silicon materials, aluminum raw materials, iron raw materials, magnesium raw materials, correction raw materials and clinker activating agents through two-grinding and one-burning process. The content of MgO in the clinkers is raised to 6-9%, the content of periclase is controlled to 2-8%, the minimum inflation performance of periclase can be used fully, the contraction of mass concrete can be compensated, concrete cracks can be decreased, and therefore the volume stability and safety of concrete are raised.

An association complex formed in a liquid environment from a metal-based chromium (VI) reducer and a non-lignosulfonate-based complexing agent is introduced into cement clinker or hydratable cement particles. In preferred embodiments, the formation of the association complex provides storage stability to the chromium reducer within the cement, such that the level of chromium (VI) after water is added to the cement remains less than 2 ppm for certain duration after mixing with water and without the necessity for further additions of chromium reducer during said duration (e.g., 26-84 or more days after addition). Compositions having the association complex are also described.

The invention discloses a method for preparing belite-sulphate aluminium cement by using coal ashes and bayer-process red mud. The method comprises the following steps: separately crushing and grinding limestone, coal ashes, bayer-process red mud, flue gas desulfurization gypsum and bauxite and sieving; preparing raw materials according to the rate value of the clinker in which Cm is 0.95-1.0, P is 3.50-3.82 and N is 0.8-1.1, wherein the f-(SO3) content in a clinker controlled to be 1-1.5% and f-(CaO) content is controlled to be greater than -2.0%; mixing and tabletting the prepared raw materials; carrying out heat preservation at 1250-1300 DEG C for 0.5-1 hour, and then quenching to obtain the clinker; crushing the clinker and grinding the crushed clinker, gypsum and portland cement clinker together into the specification of 400+/-10m<2>/kg and preparing into cement. The mechanical property and the setting time of the cement disclosed by the invention can meet the requirements of 425 early-strength sulphoaluminate cement, and the belite-sulphate aluminium cement is good in grindability, and has good anti-freezing and anti-permeability performances. The resource utilization rate of the coal ashes and the flue gas desulfurization gypsum can be improved by application of the technology, and especially, a new way is provided for solving comprehensive control problems of the bayer-process red mud.

The invention discloses filling and consolidating powder for mining purposes and a use thereof. The filling and consolidating powder comprises the following raw materials in percentage by weight: 3-5% of portland cement clinker, 8-10% of metakaolin, 5-15% of carbide slag, 18-24% of phosphogypsum, 18-22% of fly ash, 9-14% of red mud, 15-19% of blast furnace slag, 4-10% of limestone, 0.8-1.2% of polycarboxylic acid type water reducing agent and 0.4-0.7% of sodium hydroxide and is prepared by uniformly mixing and grinding to get fine powder with 400 meshes-600 meshes. When the filling and consolidating powder is used, mining tailing or coal gangue is firstly mixed with water according to a proportion in a mixing machine for forming uniform slurry, and then the consolidating powder is further added, uniformly mixed and then conveyed to a downhole place by a pipeline for filling. The cost of the filling material blended by the consolidating powder disclosed by the invention is 50-70 yuan/ton, while the cost of the similar filling and consolidating powder is 90-110 yuan/ton; and compared with the prior art, the cost is greatly reduced and the filling effect is good.

The invention discloses a cement grinding aid. The cement grinding aid comprises the following components in percentage by weight: 8 to 20 percent of triethanolamine, 0 to 10 percent of triisopropanolamine, 8 to 20 percent of diol byproduct, 0 to 10 percent of synthetic glycerine, 0 to 25 percent of molasses, 0 to 5 percent of calcium lignosulfonate, 0 to 15 percent of polyurethane, 0 to 10 percent of cystine, 3 to 5 percent of sorbitol, 5 to 10 percent of sodium carboxymethylcellulose, 0 to 5 percent of citric acid, 0 to 5 percent of silica powder, 0 to 5 percent of fly ash and the balance of water. The invention also discloses a preparation method of the cement grinding aid. The grinding aid can effectively improve the equipment-hour yield of a cement grinding mill, reduce energy consumption and remarkably improve cement performance, does not have adverse side effects on cement, reduces the using amount of cement clinkers by 4 to 10 percent, improves the equipment-hour yield of cement production by 6 to 10 percent, and has a good effect. The method has a unique process, a part of raw materials are treated by ultrasound, and the prepared grinding aid has high performance.

The invention discloses inflaming retarding high-temperature-resisting foam concrete and a preparation method thereof. The concrete is prepared by mixing a gel material, heat-resisting aggregates, a liquid-state composition, an admixture and a foaming agent, wherein the gel material is slag silicate cement and grade-I fly ash; the heat-resisting aggregates comprise vitrified micro-beads, crushed clay clinkers, nano clay and corundum sand; the liquid-state composition comprises a water reducing agent, water and acrylic resin; and the admixture comprises phosphate, an inorganic fire retardant, glass fibers and calcium carbonate crystal whiskers. The inflaming retarding high-temperature-resisting foam concrete prepared by the preparation method has the advantages of small density, relatively high strength, low heat conductivity coefficient, good heat insulation performance and the like; and the combustion performance is grade A, and the fireproof limit can reach 4 hours so that the inflaming retarding high-temperature-resisting foam concrete is a fireproof heat-insulation material with a good comprehensive performance.

The invention provides a method for producing sulfur dioxide from calcium sulfate and sulfur and relates to a chemical production process for producing sulfuric acid and cement clinker by adopting calcium sulfate. The method comprises the following steps: a, drying wet calcium sulfate into semi-hydrated gypsum, mixing other correction raw materials into the semi-hydrated gypsum to prepare a raw material, adding the raw material into a material preheating system consisting of multiple stages of cyclone preheaters, preheating, and then feeding into a reduction furnace; b, spraying liquid sulfur into the reduction furnace; c, controlling the content of oxygen in the reduction furnace to be less than 1.5%, and reducing calcium sulfate to generate calcium sulfide; and d, controlling the molar ratio of calcium sulfide generated in the step c to unreacted calcium sulfate to be (1:2)-(9:1), feeding a mixture of calcium sulfide and unreacted calcium sulfate into a rotary kiln and then reacting at oxidation atmosphere at the temperature of 900-1450 DEG C so as to obtain SO2 and the cement clinker. The method is rapid in reaction speed (the reaction time is only few seconds under fluidization), high in heat utilization rate, simple in process, and easily controllable in reaction condition.

The invention relates to a cement concrete accelerator. The accelerator comprises 50-65% of aluminium-oxygen clinker, 25-35% of calcined alunite, 3-8% of zinc sulfate and 6-8% of anhydrite. According to the accelerator, the resilience rate is low, the later strength is high, the compression strength retention rate for 28 days can reach more than 90%, and the alkali charge is low, and harm to an operating worker can be reduced greatly.

The invention discloses a rapid-hardening inorganic filling support material for mine. The support material consists of a component A and a component B, wherein the component A comprises the following raw materials in parts by weight: 93-97 parts of sulphoaluminate cement clinker, 2-5 parts of an XWZ-A type compound admixture, 0.01-0.1 part of an air entraining agent, 0.0-0.05 part of an air entraining admixture, 0.2-1.0 part of a foam stabilizer and 0.25-2 parts of fibers; and the component B comprises the following raw materials in parts by weight: 75-88 parts of gypsum, 10-25 parts of lime, 2-5 parts of an XWZ-A type compound admixture, 0.01-0.1 part of an air entraining agent, 0.0-0.05 part of an air entraining admixture, 0.2-1.0 part of a foam stabilizer and 0.25-2 parts of fibers. The prepared filling support material disclosed by the invention has the characteristics of quick setting property, lightweight, rapid hardening property, early strength, high compressibility, high residual strength, good gas tightness and the like, and is particularly suitable for the mine filling support aspect.

The invention relates to environmental-friendly clinker-free cement, dry powder mortar thereof and a preparation method thereof. The environmental-friendly clinker-free cement comprises the following components by weight portion: a) 60-92 portions of slag, b) 5-25 portions of carbide slag; c) 2-10 portions of plaster; and d) 1-20 portions of auxiliary agent, wherein the auxiliary agent can be silicon powder, siliceous dust, white carbon black, sulphate, carbonate and sulphate aluminium or the mixture of more than two or three of the silicon powder, the siliceous dust, the white carbon black, the sulphate, the carbonate and the sulphate aluminum, but preferably the mixture of the silicon powder and the siliceous dust. The environmental-friendly clinker-free cement has wide raw material source and low cost. The performance of the obtained environmental-friendly clinker-free cement reaches each index of slag silicate cement PS32.5 specified by GB/T178-2007, and the environmental-friendly clinker-free dry powder mortar meets each performance index specified in the Jiangsu province engineering construction standard-the ready mixed mortar technical regulation (DGJ32/J13-2005).

The invention belongs to the field of building interior and exterior wall body surface concrete building materials, and particularly to a concrete material capable of absorbing electromagnetism. According to the present invention, a silicate cement clinker and electric conduction graphite or electric conduction carbon black are subjected to ball milling to obtain an aqueous cementing material having electric conductivity, and the aqueous cementing material and a ceramsite aggregate having multi-level micro-pores are prepared into the electromagnetic wave-absorbing ceramsite concrete according to a certain ratio, wherein the aqueous cementing material has a certain electric conductivity, the specific surface area of the ceramsite aggregate is two times larger than the specific surface area of the aqueous cementing material, the aqueous cementing material having the small specific surface area is doped into the ceramsite micro-pore having the large specific surface area so as to make the ceramsite aggregate have the dielectric property, and the electromagnetic wave enters the ceramsite aggregate having the dielectric property and then is absorbed and converted into the heat energy so as to provide the electromagnetic wave absorbing effect.

The invention relates to a curing agent for curing/stabilizing silt (sludge) and soft foundation, and the application thereof. The curing agent comprises 5-10 parts of cement clinker, 10-20 parts of aluminium hydroxide, 10-15 parts of quick lime, 1-5 parts of anhydrous gypsum, 50-60 parts of special rock ballast powder, 5-10 parts of sodium silicate, 0.1-3 parts of sodium fluosilicate, 1-3 parts of anionic polyacrylamide, 0.5-1.5 parts of sodium dodecyl benzene sulfonate and 0.3-1.0 part of carrageenan concentration powder; and the curing agent prepared by the components has the pH value of 8-9 and the particle size of 0.005-0.15mm. 5-10% of curing agent is evenly mixed with silt (sludge), and after treatment, the compression strength reaches 0.2-0.4Mpa and the compression strength of seven days reaches 0.9-1.85Mpa, so that the curing agent has the characteristics of excellent waterproof property, water stability and hydraulicity, and can be widely applied to the curing process for a sea reclamation intertidal zone, the curing process for the sludge generated by riverway dredging, the curing and stabilizing treatment for the sludge generated in a sewage treatment plant, the strengthening for the soil of a road soft foundation layer, and the leakage-proof treatment for a mud layer at the bottom of water in a river and a lake.

The invention discloses a cementing material prepared from fly ash and a preparation method thereof. The preparation method of the cementing material comprises the following steps: milling 62-78 parts by mass of fly ash, 22-38 parts by mass of lime and 0.5-2 parts by mass of excitant to obtain an admixture of which the 80 mu m screen residue is less than 5%, adding 150-250 parts by mass of water, stirring to obtain a uniform raw slurry, carrying out hydrothermal treatment on the raw slurry at 90-98 DEG C for 8-16 hours, dewatering in a filter press to obtain a hydrothermal synthesis block, calcining at 750-950 DEG C for 30-120 minutes, and cooling with air to obtain clinker; and milling 92-95 parts by mass of clinker, 5-8 parts by mass of gypsum and 0.2-1.5 parts by mass of retarder until the 80 mu m screen residue is less than 4%. The cementing material can utilize low-grade fly ash, and has the advantages of high utilization ratio of fly ash, low calcination temperature and low heat loss. The product has the characteristics of quick setting and hardening, high long-term strength and high sulfate attack resistance. The cementing material is especially suitable for tunnel, underwater, alkaline land and coastal area engineering.