216 results about "Alkali activated slag" patented technology

The invention discloses a composite tailing non-fired and non-steamed building block brick and a preparation method thereof. The brick comprises the following raw materials in parts by weight or volume: 50-300 parts of tailing and 3-30 parts of cement; and at least two components are selected from the active wastes such as fly ash, coal gangue, shale slag, alkaline residue, carbide slag, chemical gypsum and the waste residue of metallurgical industry to be mixed with the raw materials. The preparation method comprises the following steps: mixing to stir, compressing and shaping, performing natural curing or utilizing the solar heaing hydrating maintenance to prepare the composite tailing building block brick. By adopting the preparation method of the invention, the single performances of the tailings and slags can be changed, thus the product can have higher strength and quality owning to the interaction of materials; the technology does not adopt firing and steaming, the cost is low; different sizes of solid bricks, perforated bricks, hollow blocks, floor tiles, grass planting bricks, roadside bricks and artistic rails can be prepared by changing the mould; and various harmful slags such as tailings can become good, the Chinese development direction of the comprehensive utilization of resources is satisfied and the brick of the invention has development and application prospect.

The invention relates to a waterproof high-strength gypsum-based concrete brick or building block and a production method thereof. The waterproof high-strength gypsum-based concrete brick or building block mainly contains gypsum-based composite binding agent, coagulation accelerator and filler. The weight proportions of the components are as follows: 10-100% of gypsum-based composite binding agent, 0-6% of coagulation accelerator, 0-90% of filler, 0-1% of early-strength agent, 0-1% of water-reducing agent, 0-6% of lime and 0-15% of gypsum hemihydrate. 80% of the raw materials of the high-strength gypsum-based concrete brick or building block are industrial byproducts, so that the invention reduces the production cost, realizes energy conservation and discharge reduction, avoids the land occupancy and water pollution caused by chemical gypsum, ore slag, coal ash, furnace slag, alkali waste and carbide slag, and protects the environment.

The invention provides an acetylene sludge aerated concrete block, which is prepared by processing the following raw materials in part by weight: 20-30 parts of acetylene sludge, 25-30 parts of coal ash, 5-10 parts of cement, 4-6 parts of modified attapulgite, 5-10 parts of water treatment sludge, 5-10 parts of soda residue, 5-10 parts of light calcium powder, 10-15 parts of lime, triethanolamine, 4-5 parts of gypse, 0.02-0.08 part of aluminium powder, oxidized paraffin wax soap, 0.01-0.02 part of calcium bicarbonate, 2-3 parts of chelky slag, 1-2 parts of lignocellulose, 0.3-0.5 part of water glass, 0.03-0.05 part of borax, 1-2 parts of sodium hexametaphosphate, 1-2 parts of hydroxy propyl methyl cellulose sodium and 1-2 parts of superfine polyvinyl alcohol, wherein the weight of the triethanolamine is 0.1-0.3 percent of that of the lime, and the weight of the oxidized paraffin wax soap is 3-5 percent of that of the aluminium powder. According to the invention, the acetylene sludge is added into the raw materials of the aerated concrete block, and meanwhile other conventional additives and modified nano additives are added; the aerated concrete block is prepared by adopting a proper technology and is low in cost and good in performance; the circulating economy effect of changing waste into valuable is realized; the pollution is reduced; and the prepared aerated concrete block has the characteristics of light volume weight, high thermal insulation performance, good sound absorption effect and high strength and can be used for non-bearing or bearing wall bodies.

The invention discloses alkali-activated slag powder geopolymer mortar for structure reinforcement and a preparation method thereof. The alkali-activated slag powder geopolymer mortar for structure reinforcement is prepared from, by weight, 150-210 parts of slag powder, 0-60 parts of fly ash, 400-700 parts of sand, 190-240 parts of water glass and 25-50 parts of solid sodium hydroxide. The preparation method comprises the following steps that the slag powder, the fly ash and the sand are mixed to be uniform according to the proportions; solid sodium hydroxide particles are dissolved in the corresponding amount of the water glass according to the proportion; sodium hydroxide-dissolved water glass is added into well-mixed dry materials, and stirring is conducted continuously to be uniform; the well-stirred alkali-activated slag powder geopolymer mortar is used for building structure reinforcement; the alkali-activated slag powder geopolymer mortar has high compressive strength, good adhesive property with concrete and fiber cloth materials and a wide fluidity range and can adapt to the situation of reinforcing building structures through a fiber cloth bonding method or a grouting pouring method.

The invention discloses cement with high water-retaining property. The cement with high water-retaining property consists of silicate cement clinker, a dechlorination caustic sludge mixture, a mixed material, gypsum and other auxiliaries. The water-retaining component dechlorination caustic sludge mixture of the cement is an inorganic material, so that the decomposition failure problem of organic materials is unavailable and the water-retaining rate of the cement is not lower than 90%; the cement can be produced by equipment in the existing cement plants so that the process is easy to realize; and the large solid waste such as caustic sludge and returned sand and rocks of the soda plants can be digested at the same time, and soda ash can be produced by using part of the calcium hydroxide.

The invention provides an alkali dreg treatment method which includes the following steps: first, an alkali pretreatment system; second, a biological treatment system; and Third, a waste gas biological treatment system. Through the biological degradation, the organism in the waste gasis decomposed so as to eliminate the odor in the waste gas. The invention has the advantage that the highly efficient biological treatment process adopted by the comprehensive alkali treatment of the method has the characteristics of a little investment, low energy consumption, cheap treatment, safe and reliable performance, convenient operation and management, no pollution, friendliness to the environment, etc. The application of the method greatly reduces the attack to the sewage treatment field during the alkali dreg treatment and reduces the possible great amount of entrustment cost. On the one hand, the invention prevents the pollution of the alkali dreg to the environment, thereby protecting the environment, on the other hand, the invention makes full use of the potential value of the alkali dreg, thereby creating a new mode of benefit making through the circular economy. The invention conforms to the clean development of the enterprise, protects the natural environment and achieves the saving and sustainable development.

The invention discloses a low-shrinkage sludge ceramsite alkali-activated full-slag foam concrete plate and a preparation method thereof. The foam concrete plate is prepared from slag, silica fume, pulverized fuel ash, fibers, ceramsite, sodium polyacrylate SAP, water, a foaming agent, alkali activator and a water reducing agent. According to the method, cement is completely replaced by slag to prepare foam concrete, the shrinkage performance and heat conductivity coefficient of the foam concrete material can be reduced by doping ceramsite and sodium polyacrylate SAP, and the tensile strength of the foam concrete material can be guaranteed by utilizing an alkali-activated slag system and ceramsite. The prepared foam concrete plate has excellent mechanical performance and low-shrinkage self-insulation performance and is capable of solving the problems that a traditional autoclaved aerated concrete material needs high-temperature steaming and a prefabricated part made from the traditional autoclaved aerated concrete material easily cracks; in addition, the invention effectively realizes recycling of slag and other industrial wastes, saves energy, protects the environment and therefore has an important application value in the field of heat insulation of walls and the like.

The invention discloses alkali-activated slag mortar. The alkali-activated slag mortar consists of the following components in part by weight: 100 parts of mineral powder, 100 to 300 parts of water slag, 4 to 15 parts of alkali activator and 30 to 60 parts of water. The alkali-activated slag mortar can improve carbonization resistance, freeze-thaw cycle resistance, chloride ion penetration resistance and interface compactness of the mortar, provides a new route of water slag utilization and increases the utilization ratio of wastes.

The invention provides alkali-activated slag geopolymer concrete. The geopolymer concrete is a compound powder cementing material is formed by slag powder and construction waste renewable micro powder under the priming action of a water glass solution of sodium hydroxide. The alkali-activated slag geopolymer concrete is prepared from, by weight, 150-210 parts of slag powder, 20-60 parts of construction waste renewable micro powder, 190-240 parts of water glass, 25-50 parts of solid sodium hydroxide, 400-700 parts of sand and 0-1600 parts of coarse aggregate. Being prepared from slag powder, construction waste renewable micro powder, water glass, solid sodium hydroxide, sand and coarse aggregate, the alkali-activated slag geopolymer concrete has the advantages of being high in early strength, high in durability, high temperature resistance, corrosion resistance and heat-insulating property and low in production energy consumption and is green building material low in cost and high in performance.

The invention discloses dry-mixed pre-mixed mortar prepared by alkali activated slag cement, and a preparation method thereof. The dry-mixed pre-mixed mortar includes dry-mixed masonry mortar, dry-mixed plastering mortar and dry-mixed screeding mortar; the dry-mixed pre-mixed mortar is prepared by the following raw materials by weight: 10-30 parts of slag, 0.5-2 parts of excitant, 0-8 parts of mineral admixture, 70-85 parts of aggregate and 0.1-1 part of functional additivs. The preparation method thereof comprises the following steps: step (1) of grinding slag powder until specific surface area is 350-400 m<2>/kg; step (2) of weighing various components by weight in part; step (3) of putting various components weighed in the step (2) into a blender mixer at constant temperature by constant pressure, and mixing for 5-10 min to obtain dry-mixed pre-mixed mortar. The preparation method provided by the invention can prepare dry-mixed pre-mixed mortar by using alkali activated slag cement instead of portland cement so as to save cost, reduce resource consumption and reduce environmental pollution.

The invention discloses a phase-change thermal insulation putty consisting of the following substances in percentage by weight: 30-40% of activated and regenerated concrete fine powder, 5-10% of ground limestone, 3-5% of talcum powder, 15-25% of quartz sand, 1-3% of alkaline mud, 3-5% of washing slurry, 3-5% of silicate cement clinker, 1-3% of aluminum slag, 8-12% of a phase-change material, 2-5% of expanded perlite powder and 0.5-1.5% of an additive. The phase-change thermal insulation putty disclosed by the invention has the characteristics of remitting the environmental pressure from urban construction and alkaline production enterprises and the pressure of the resource shortage of building material enterprises, realizing energy conservation and emission reduction of buildings, reducing the waste burden of enterprises, increasing the income and improving the ecological environment.

The invention discloses a method for preparing a sintering-free cementing material from waste incineration fly ash. The method comprises the following steps: (1) mixing silicon slag and blast furnaceslag, grinding, sieving to obtain a mixed silicon material, and mixing graphite powder and waste incineration fly ash to obtain graphite fly ash; (2) mixing sodium hexametaphosphate, the mixed siliconmaterial and graphite fly ash to obtain a gel precursor material; (3) dissolving the gelling precursor material in water, stirring while performing low-temperature plasma irradiation, drying, grinding and sieving to obtain a secondary cementing material; (4) mixing aluminum hydroxide waste and alkaline residues, grinding, and sieving to obtain an aluminum activator; and (5) uniformly mixing the aluminum activator and the secondary cementing material to obtain the cementing material. High-temperature sintering is not needed in the preparation process, so that process energy consumption is greatly reduced; the cementing material can achieve the highest heavy metal curing rate of 99.24%, the highest chlorine removal rate of 98.75% and the highest dioxin substance removal rate of 98.37%; andthe uniaxial compressive strength of a prepared mortar test block is as high as 50.68 MPa.

The invention provides an alkali activated slag foamed cement product and its preparation method. The product is prepared from the following raw materials by weight: 60 to 75% of an alkali slag cementing material, 0.5 to 1% of a composite admixture, 8 to 15% of foam and 16 to 25% of water. The alkali slag cementing material is prepared from the following raw materials by weight: 93.0 to 96.0% of slag powder, 1.0 to 2.0% of a water reducing agent and 2.0 to 5.0% of alkali powder particles. According to the invention, in a formula, the slag powder and the alkali powder particles which are generally used as industrial wastes are utilized as the cementing material for the foamed cement; the product has excellent early-strength mechanical performance and thermal insulation performance, stable and uniform foam and a short setting time; cost is reduced while production efficiency is improved. The product provided in the invention can be processed and molded in a factory or directly casted after mixing on the spot and is applicable to a non-load-bearing wall building block, a floor heating insulation layer and a roof insulation layer of a building or to preparation of various insulation materials.

The invention discloses an alkali-activated slag mortar capable of reducing drying shrinkage and plastic cracking, and the alkali-activated slag mortar comprises the following components in parts by weight: 100 parts of mineral powder, 100-300 parts of water granulated slag, 4-15 parts of alkali-activated agent, 30-60 parts of water and 1-15 parts of rubber, wherein the rubber is rubber particlesor rubber powder. The mechanical strength of the alkali-activated slag mortar prepared by the components can be maintained at the existing level, and the drying shrinkage and the plastic cracking areobviously reduced.

The invention provides a C30-grade all-solid-waste concrete and a preparation method thereof. Alkali residue carbide slag is utilized to synergistically excite a slag and fly ash composite cementing material to replace cement, and iron tailing sandstone is utilized to replace traditional sandstone. The all-solid-waste concrete is prepared from the following components in parts by weight: 52 to 156parts of alkaline residue, 26 to 78 parts of carbide slag, 182 to 234 parts of slag, 104 to 208 parts of fly ash, 170 to 190 parts of water, 460 to 510 parts of iron tailing sand, 1030 to 1150 partsof iron tailing ore and 1 to 3 parts of polycarboxylate superplasticizer. The new all-solid-waste concrete is prepared from various industrial solid waste residues, the 28d strength reaches 30 MPa orabove, waste is turned into wealth, the environment is protected, and meanwhile the production cost is reduced.

The invention discloses a stable broken stone structure layer prepared from industrial waste alkaline residue and cement, and a construction method thereof. The structure layer is composed of the following raw materials in parts by weight: 100 parts of aggregate, 4 to 10 parts of water, 1 to 10 parts of cement, and 1 to 10 parts of alkaline residue. The construction method comprises the following steps: processing a raw road surface, preparing a side mould, mixing, paving, pressing, curing, and quality inspecting; and finally builds an industrial waste alkaline residue and cement stable broken stone structure layer with a thickness of 180 to 220 mm. It has been proved by a lot of indoor researches and tests that the pavement performance indicators of the structure layer totally meet the standards issued by the ministry of communications, and the structure layer has the characteristics of strong anti-scouring performance and prominent shrinkage fracture resistant performance. Furthermore, the preparation method of the structure layer can effectively utilize industrial alkaline residue, has the advantages of good pavement performance, convenient construction, and low cost, is energy-saving and environment-friendly, is beneficial for the continuous development of economy and society, and can be widely applied to basic layers or basic bottom layers of airport roads, city roads, highways, and each classified highway.

The invention discloses a method for washing carbon for removing sodium from silicon-removed alkaline residues of coal ash or basic red mud after a process of extracting Al2O3. The method is characterized by comprising the following step of: in a stirring and washing process, introducing desulfurated flue gas into a stirring and washing solution, wherein the washing temperature of the stirring and washing solution after introducing the desulfurated flue gas is 30-80 DEG C, the liquid/solid ratio L/S of the stirring and washing solution is 3-10, the introducing quantity of the flue gas is 0.5-2L/min, and the stirring and washing time is 1-3h. The method is simple and easy to apply, and the used stirring and washing solution can be used as a carbon source for cultivating spirulinas and a pH regulating agent; the silicon-removed alkaline residues after sodium removal can be used as a substrate for producing aluminum oxide by a lime sintering method; and the red mud after sodium removal is used as a substrate for producing silicate cement. The invention not only achieves the effects of waste gas emission reduction, waste liquid recycling and waste reduction, but also truly realizes a circulating economic model of the sustainable comprehensive recycling of three wastes (waste flue gas, sodium removal liquid and the red mud), and has obvious economic and social benefits.

The invention discloses a CASH mineral suitable for improving the volume stability of an alkali-activated slag system and a preparation method thereof. The prepared mineral can promote the hydration of alkali-activated slags and shorten the alkali-activated setting time. The preparation method comprises the following steps that (1), a calcareous material, an aluminum material, a siliceous materialand deionized water are accurately weighed, the aluminum material and the siliceous material are mixed with the deionized water in sequence and then dispersed, and then the calcareous material is added to obtain a mixture; (2), the mixture obtained in step (1) is heated in a water bath and stirred for reaction; (3), after the reaction is completed, the mixture is sealed in a polytetrafluoroethylene container, placed in a water bath and solidified to the age of 3-7 days. (4), after the solidification is completed, a product obtained in step (3) is washed with absolute ethanol and distilled water and then filtered for twice or more; (5), a product obtained in step (4) is dried in a vacuum drying oven until constant weight to obtain the CASH mineral.

The invention discloses an alkali activated slag cement concrete prefabricated inspection well lid and a preparation process thereof. The inspection well lid is prepared from granulated blast-furnace slags, cement clinkers, retarders, sand, stone, steel fiber, water and sodium silicate. The preparation process comprises the following steps: in parts by weight, premixing granulated blast-furnace slags, cement clinkers, retarders, sand and stone in a mixer for 2-3 minutes; then, adding steel fiber by using a vibrating screen, and mixing the obtained mixture; adding water and sodium silicate by using a funnel; after mixing the obtained product, pouring the obtained product into an iron well-lid mould; after carrying out standing for 2-3 hours at room temperature, placing the obtained product into a steam curing chamber at a temperature of 75-85 DEG C to carry out curing for 2-3 days; and after carrying out natural cooling demoulding, carrying out watering and film covering on the obtained product to cure 7 for days. According to the invention, by using the excellent mechanical properties and durability properties of alkali activated slags, the impact-resistant and bending-resistant properties of the well lid are enhanced through mixing steel fibers with different lengths, and an alkali activated slag composite prefabricated round plate which is low in cost, light in weight and high in performance is prepared for replacing an iron inspection well lid, thereby solving the problem that an urban inspection well lid is stolen.

The invention discloses an alkali slag water-retaining agent and a preparation method and application thereof. The alkali slag water-retaining agent is composed of dechlorination alkali slag and a mixed material. The method for preparing the alkali slag water-retaining agent comprises the steps of evenly mixing the dechlorination alkali slag and the mixed material by mass percentage, adding the dechlorination alkali slag and the mixed material into a grinding device, performing grinding treatment to mixed powder with 0.30 mm residue on sieve smaller than 10 wt%, and obtaining the alkali slag water-retaining agent. The alkali slag water-retaining agent is good in water-retaining property, can be used for improving water-retaining property of mortar and contractibility of concrete, and is economical and environmentally friendly.

The invention relates to a method for completely clearing out caustic dross from a caustic dross pool so as to make industrial backfilling. The method is characterized in that the method comprises the following steps that: a level dam exceeding backfill scale height is enclosed around a backfill site; a construction site is cleaned up at the bottom of a caustic dross pool; backfilling raw materials such as caustic dross, phosphorite metal ore, natural soil and fly ash, etc. are flushed out to form slurry by a water gun by means of a high-pressure water pump; according to the percentage of caustic dross and the raw materials used to make backfilling, the slurry is conveyed to and mixed inside a pipe through a slurry pump pipe, and then is fully mixed to form a backfilling material through the slurry pump; moreover, the backfilling material is conveyed to a backfill site; the surface of the backfilling material is dried in the sun after water is discharged; then, a channel is dug by an excavator with the bottom of the channel provided with a water pump to realize drainage; therefore, the backfilling is leveled and pressed compact by a bulldozer after the backfilling is dewatered to reach backfilling hardness. The method has the advantages that: the method makes full use of resources and changes waste materials into things of value; moreover, the method has simple process, fewer links and low production cost.