424 results about "Expanded clay aggregate" patented technology

The invention provides anti-disturbance micro-expansion lightweight ultra-high performance concrete and a preparation method thereof. According to the concrete disclosed by the invention, the generation of micro cracks under disturbance can be effectively inhibited through the fiber bridging effect of the crystal whiskers and the temperature-shrinkage indented fibers and the micro pre-compressive stress of the temperature-shrinkage indented fibers under hydration exothermic excitation; the micro-crack healing effect of the nano-cellulose and the internal curing effect of the saturated pre-wetted coal gangue ceramsite cooperate to repair microstructure damage generated under strong disturbance, and the disturbance resistance of the concrete is further improved. The internal curing effect of the saturated pre-wetted coal gangue ceramsite and the expansion agent shrinkage compensation synergistically improve the volume stability of the concrete. The 28d compressive strength of the concrete is gt; compared with common ultra-high performance concrete, the volume weight of the ultra-high performance concrete is reduced by more than 20%, the anti-disturbance strength retention rate of the ultra-high performance concrete is greater than or equal to 95%, the ultra-high performance concrete shows excellent bonding and durability, the comprehensive performance of the ultra-high performance concrete is greatly improved, and the ultra-high performance concrete has important practical application value.

The invention relates to the technical field of solid waste recycling, in particular to a method for preparing ceramsite through multi-element solid waste co-treatment. The method comprises the following steps: S1, uniformly stirring and mixing waterworks sludge, washing-free waste incineration fly ash, polluted soil and iron tailing slag powder in proportion to obtain a stirred mixture; s2, directly putting the stirred mixture which is uniformly mixed and is in a wet state into a ceramsite drying and granulating kiln, and granulating in the kiln to obtain raw material balls; s3, the raw material balls enter a pyrolysis section in the kiln to be subjected to low-temperature pyrolysis treatment; s4, the pyrolyzed raw material balls enter a calcining kiln to be subjected to high-temperature sintering treatment; and S5, passing the obtained sample through a cooling kiln, and taking out the cooled sample to obtain the multi-element solid waste ceramsite. According to the method, pure solid waste is adopted for preparing the ceramsite, and the links of raw material drying and granulation in traditional ceramsite manufacturing are omitted. The sludge of the waterworks, the waste incineration fly ash, the polluted soil and the iron tailing slag are utilized in a high-valued manner, the energy consumption is low, and less secondary environmental pollutants are generated.

The invention provides a water-based self-suspension fracturing propping agent as well as a preparation method and application thereof, and relates to the technical field of oil exploitation. The water-based self-suspension fracturing propping agent comprises aggregate and polyacrylamide gel coated on the surface of the aggregate, wherein the aggregate is quartz sand or ceramsite; according to the invention, the polyacrylamide gel is coated on the surface of the quartz sand or the ceramsite, and by controlling the particle size of the aggregate, the dosage of the polyacrylamide gel and the like, the obtained propping agent overcomes the problems of high settling velocity, high fracturing construction pressure, poor flow conductivity after fracturing and great formation damage of the existing fracturing propping agent, and has the advantages of strong pressure bearing capacity and good self-suspension performance.

The invention discloses ceramsite lightweight aggregate structural concrete and a preparation method thereof, and belongs to the technical field of concrete. The ceramsite lightweight aggregate structural concrete is prepared from the following raw materials in parts by mass: 240 to 270 parts of cement, 25 to 35 parts of mineral powder, 80 to 95 parts of fly ash, 210 to 250 parts of coal gangue crushed materials, 725 to 805 parts of modified coal gangue ceramsite, 10 to 30 parts of waste rubber materials, 3.5 to 5 parts of water reducing agents and 165 to 180 parts of water. The modified coal gangue ceramsite is obtained by coating the surface of a coal gangue ceramsite matrix with an epoxy resin layer and then grafting a hydrophilic polymer, the porosity of the coal gangue ceramsite matrix is 40-60%, and the aperture ratio is 1.5-6%. The epoxy resin layer on the surface of the modified coal gangue ceramsite provides an anti-permeability barrier, the hydrophilic polymer on the surface adjusts the wettability of the ceramsite, the binding force with other components of the concrete is improved, and the concrete has excellent shrinkage and dry crack resistance.

The invention relates to the technical field of fired ceramsite, and particularly discloses high-strength ceramsite prepared from coal gangue as well as a preparation method and application of the high-strength ceramsite. The invention discloses a preparation method for preparing ceramic particles from coal gangue. The preparation method comprises the following steps: drying; performing pyrolysis; decarburization: carrying out heating combustion-supporting on a material layer from top to bottom by hot air with the temperature of 450-600 DEG C from the pyrolysis section and the cooling section in the decarburization section, and completing decarburization of the ceramsite from top to bottom; hot air from the cooling section is subjected to heat compensation and temperature rise to heat ceramsite, the temperature of a ceramsite material layer is 1000-1140 DEG C, and the ceramsite material layer is subjected to heating combustion supporting from top to bottom; and cooling: cooling the roasted ceramsite to 80-100 DEG C. By means of the technical scheme, the treatment scale of the coal gangue ceramsite can be increased, the production cost is effectively reduced, and the ceramsite meets the requirements for decarburization, low water absorption and high strength.

The invention relates to the technical field of concrete, and particularly discloses high-strength low-heat-conductivity self-compacting concrete and a preparation method thereof. The high-strength low-heat-conductivity self-compacting concrete can maintain ideal strength performance while improving the heat insulation performance, so that the high-strength low-heat-conductivity self-compacting concrete is more suitable for being applied to occasions sensitive to temperature, such as underground spaces and external walls in severe cold areas. In addition, the ceramsite provided by the invention also provides a new consumption way for the vanadium slag, and can effectively realize recycling of wastes.

The invention discloses quick-hardening high-strength lightweight aggregate concrete, which is prepared from the following raw materials: ordinary Portland cement, quick-hardening sulphoaluminate cement, a mineral admixture, silica fume, ceramsite, river sand, water and an additive, and the additive is a mixture of a water reducing agent, a slump retaining agent, a retarder, a thickening agent and an air entraining agent; after the ceramsite absorbs water and is saturated, the surface of the ceramsite is coated with a cementing material, and the cementing material is hydrated to form a slurry shell; ordinary Portland cement and quick-hardening sulphoaluminate cement are compounded, mineral admixtures and silica fume are doped, the early strength of the lightweight aggregate concrete can be improved, meanwhile, the development of later strength is guaranteed, a layer of slurry'shell 'is formed on the surface of ceramsite through the hydration effect of the cementing material, and the surface of the ceramsite is wrapped by the composite cementing material. According to the ceramsite wrapped with the ash, firstly, the strength of the ceramsite can be improved, and then the strength of the concrete is improved; 2, the water absorption and water return phenomena of the ceramsite can be avoided; and thirdly, the floating phenomenon of the ceramsite can be improved.

The invention discloses a lightweight concrete safety energy storage cabinet and a preparation method thereof, and the lightweight concrete safety energy storage cabinet is obtained by injecting lightweight concrete into a mold and performing steam curing; the lightweight concrete is prepared from the following raw materials in parts by weight: 20 to 40 parts of cement, 8 to 20 parts of silica fume, 8 to 25 parts of slag powder, 0 to 10 parts of fine sand, 15 to 35 parts of lightweight fine ceramsite sand, 0 to 21 parts of coarse ceramsite sand with the particle size of 5 to 10 mm, 0 to 3 parts of steel fiber, 0 to 1.5 parts of PP fiber, 0.5 to 2.0 parts of polycarboxylic acid type water reducing agent, 0 to 14 parts of hollow glass beads, 0.1 to 0.5 part of release agent and water. Wherein the water-binder ratio is 0.15 to 0.22; the use amounts of the steel fibers and the PP fibers are not 0 at the same time; the light ceramsite sand and the coarse ceramsite sand are subjected to pre-wetting treatment before being used; the fireproof, explosion-proof and heat-insulating material has the characteristics of light weight, safety and impermeability, and has excellent fireproof, explosion-proof and heat-insulating properties.

This invention discloses a heat-insulating and heat-resistant shotcrete and its preparation method. This heat-insulating and heat-resistant shotcrete is composed of cement, modified silica mortar, modified heat-insulating ceramsite, fine aggregate, water, admixtures, and accelerators. In this invention, high-strength shale ceramsite with surface modification using hydrogel is introduced as a heat-insulating filler, significantly improving the dispersion and stability of lightweight aggregate in the mortar. It also possesses strong water absorption and slow-release capabilities and surface sealing functions, enabling it to provide pore insulation and internal curing through water storage and release in high-temperature environments. The addition of modified silica mortar, which effectively improves the high-temperature stability and density of the mortar hydration products, comprehensively enhances the homogeneity of the shotcrete mixture, the heat insulation performance of the hardened body, and the strength development and durability under high-temperature conditions. This effectively improves tunnel chamber temperature and extends the service life of the shotcrete under high-temperature conditions. The heat-insulating and heat-resistant shotcrete technology has a clear working mechanism, simple production process, and excellent performance. It is suitable for large-scale production and is of great significance for the high-quality construction of underground projects such as tunnels and mines in high-temperature and high-temperature water inrush environments.

The invention belongs to the technical field of concrete, and particularly relates to high-water-permeability recycled concrete. The concrete is prepared from 170 to 190 parts of water, 300 to 320 parts of cement, 90 to 120 parts of fly ash, 80 to 120 parts of silica fume, 90 to 110 parts of rice hull ash, 580 to 620 parts of medium sand, 430 to 470 parts of recycled fine aggregate, 1000 to 1100 parts of recycled coarse aggregate, 70 to 100 parts of ceramsite, 6 to 8 parts of a water reducing agent, 2 to 4 parts of an air entraining agent, 1 to 3 parts of a retarder, 110 to 130 parts of fly ash hollow microspheres, 70 to 90 parts of steel slag powder, 30 to 40 parts of silica sol, 20 to 30 parts of cellulosic fibers and 40 to 50 parts of an alkaline activator. 50-60 parts of an organic porous waste material; the composite material has abundant pore structures, strong water permeability, moderate strength, high resource utilization rate, outstanding environmental protection property and the like, improves the utilization rate of rainwater resources, and promotes continuous improvement of ecological environment.

The invention discloses a preparation method of lightweight micro-expansion ceramsite. The lightweight micro-expansion ceramsite is prepared from the following raw materials: 30-90 parts of lightweight clay clinker powder, 5-50 parts of quartz tailing powder, 1-10 parts of an expanding agent, 5-15 parts of a binding agent and 0-10 parts of a reinforcing agent. The preparation method comprises the following steps: uniformly mixing the light clay clinker powder, the quartz tailing powder, the expanding agent, the binding agent and the reinforcing agent in a double-shaft stirrer, and then adding the mixture into a pelletizing disc for pelletizing or adding the mixture into an extruder for extruding and pelletizing. The mass of the used water is 15-30% of the mass of the whole solid material. And putting the ceramsite blank granulated in the step into a curing kiln for curing or naturally curing for more than or equal to 8 hours. And carrying out heat treatment on the ceramsite cured in the previous step at the treatment temperature of normal temperature to 700 DEG C to ensure that the water content is less than 1.5%, thereby obtaining the light micro-expansion ceramsite. The lightweight micro-expansion ceramsite prepared by the invention has excellent micro-expansion characteristic at high temperature, has the characteristics of heat insulation, heat preservation, low preparation cost by utilizing industrial solid waste and the like, and is a preferred raw material for preparing lightweight heat-insulation castable or lightweight heat-insulation bricks.

The invention discloses a method for synergistically preparing high-strength light ceramsite and recycling tin from tin-containing tungsten tailings and red mud, and belongs to the technical field of solid waste resource utilization. The method comprises the following steps: mixing tin-tungsten-containing tailings, red mud and other raw materials with water, pelletizing to obtain pellets, drying the pellets, transferring the pellets into a rotary kiln, mixing the pellets with externally blended coal to complete two-stage roasting, recovering a tin product from flue gas in the roasting process, and physically sorting a solid product obtained by roasting to separate a ceramsite product. According to the method, the characteristics that the content of iron, aluminum, sodium and the like in the red mud is high are utilized to strengthen decomposition and transformation of garnet in the tin-containing tungsten tailings so as to promote volatilization of tin wrapped in the garnet, the high-strength light ceramsite is formed through raw material regulation and control, compared with pure tin collection of the tin-containing tailings, the method has the advantages that energy consumption is greatly reduced, the process additional value is increased, no tailings are generated, and the method is suitable for industrial production. The method is of great significance to construction of tailings-free mines and absorption of red mud, and the economic feasibility of the process is extremely high.

The invention relates to the technical field of concrete, and particularly discloses a process for preparing high-performance concrete from artificial aggregate, which comprises the following steps: mixing sintered steel slag aggregate with the particle size of 5-20mm and regenerated fly ash ceramsite according to the mass ratio of 3: 1, carrying out infiltration treatment by using a silane coupling agent solution with the mass concentration of 8%, and drying in a vacuum environment at 60 DEG C until the water content is less than or equal to 0.5%; the preparation method comprises the following steps: mixing 42.5 R ordinary Portland cement, S95-grade superfine slag powder and silica fume according to a mass ratio of 6: 3: 1, and doping a polycarboxylate superplasticizer accounting for 0.8-1.2% of the mass of the cement and a graphene oxide nanosheet accounting for 0.05% of the mass of the cement; adding the pretreated artificial aggregate, the cementing material and the graded quartz sand into a planetary mixer according to the mass ratio of 1: 0.35: 0.6, adding the ice crumb phase change material modified water in three times, and controlling the discharge temperature of the freshly mixed concrete to be 5-8 DEG C; through the temperature control characteristic of the ice crumb phase change material and the multi-scale structural design of the artificial aggregate, the compactness of an interface transition area is enhanced, and microcrack initiation and propagation in freezing and thawing circulation are inhibited.

The invention discloses a grinding device for producing ceramsite sand by using waste ceramic tiles, and particularly relates to the technical field of grinding devices.The grinding device comprises a device support, a connecting longitudinal frame is fixedly mounted at the top end of the device support, a primary breaking mechanism is fixedly mounted at the top end of the connecting longitudinal frame, and a secondary breaking mechanism is fixedly mounted at the bottom end of the connecting longitudinal frame; a grinding mechanism is fixedly mounted at the bottom end of the secondary crushing mechanism; the primary crushing mechanism comprises a primary crushing outer frame, the primary crushing outer frame is fixedly mounted at the top end of the connecting longitudinal frame, and a sealing cover is mounted on one side of the top end of the primary crushing outer frame through a hinge. The waste ceramic tiles subjected to primary crushing can be directly and effectively subjected to secondary multiple times of positive and negative staggered crushing, and the outer diameter size of the top of the conical structure is smaller than the outer diameter size of the bottom of the conical structure, so that the waste ceramic tiles are gradually crushed into ceramic tile particles with small particle sizes, and subsequent grinding and processing are facilitated.

The invention provides straw fiber lightweight concrete and a preparation method thereof, and belongs to the field of building materials. The invention provides straw fiber lightweight concrete, which is prepared from the following preparation raw materials in parts by mass: 360 to 400 parts of cement; 40 to 60 parts of fly ash; 600 to 650 parts of a ceramsite filter material; 600 to 650 parts of sand; 150 to 170 parts of water; 1-3 parts of straw fiber; and 4-5 parts of a water reducing agent. The ceramsite filter material which is hard in surface and internally provided with a large number of micropores is used as the coarse aggregate, so that the lightweight effect is achieved; straw fibers are doped, agricultural waste is utilized, the production cost is reduced, and environmental pollution is reduced. The straw fiber lightweight concrete disclosed by the invention has relatively good compressive property and splitting tensile property, and the preparation method has a wide prospect.

The invention provides a foundation structure of a fused salt storage tank of a photo-thermal power station, which comprises a composite thermal insulation layer and a reinforced concrete retaining wall, the composite thermal insulation layer is arranged below a tank bottom plate of the fused salt storage tank, and the composite thermal insulation layer comprises a top cushion layer, ceramic fiber cloth and a ceramsite soil layer which are sequentially arranged downwards; an annular beam is arranged at the top of the composite heat preservation layer and composed of an annular steel plate and a heat-resisting concrete layer which are sequentially arranged below the tank bottom plate, a protective ring wall is arranged in the circumferential direction of the composite heat preservation layer, and a concrete foundation cushion layer with a built-in ventilation pipe and a built-in temperature measuring sleeve is arranged below the composite heat preservation layer. A circle of retaining wall is arranged on the periphery of the retainer wall, and the space between the retaining wall and the retainer wall is filled with compacted plain soil. The foundation structure reduces the leakage risk of molten salt.

The invention provides lightweight non-sintered ceramsite prepared from machine-made sand tailing mud as well as a preparation method and application of the lightweight non-sintered ceramsite, and relates to the field of lightweight building materials. The preparation method comprises the following steps: weighing the following raw materials in parts by weight: 50-65 parts of machine-made sand tailing mud, 35-50 parts of fly ash, 10-25 parts of cement, 16-19 parts of quick lime, 1-4 parts of ammonium carbonate and 12-18 parts of water; the method comprises the following steps: dehydrating and crushing the machine-made sand tailing mud, and stirring and mixing the materials in a round pot granulator to obtain an unfired ceramsite mixture; spraying the sodium silicate solution into a granulator at a constant speed to obtain spherical particles; and curing to obtain the light non-sintered ceramsite. The quick lime is used for pretreating the machine-made sand tailing mud, the water content of the machine-made sand tailing mud can be reduced, the machine-made sand tailing mud is successfully granulated, the strength of the ceramsite can be effectively improved, meanwhile, the ceramsite is combined with sodium silicate for alkali excitation, ammonium carbonate is used for foaming, preparation is simple, energy consumption is low, the solid waste utilization rate is high, and economic benefits are remarkable.

The invention provides solid-waste-based phase-change energy-storage lightweight aggregate applied to marine concrete and a preparation method of the solid-waste-based phase-change energy-storage lightweight aggregate, and belongs to the technical field of building materials. According to the invention, solid wastes such as coal gangue and fly ash are adopted as raw materials to prepare the ceramsite, and the ratio and firing conditions of the raw materials such as coal gangue and fly ash are adjusted to improve the mechanical properties such as mechanical strength and adhesive property of the ceramsite, so that the ceramsite is more suitable for marine concrete; and then liquid paraffin is injected into the ceramsite in a vacuum impregnation manner, so that the frost heaving resistance, temperature stress resistance and impact resistance of the marine concrete can be remarkably improved. Through three core innovations of solid waste resource utilization, lightweight high-strength aggregate preparation and phase change energy storage function integration, the problems of single material performance, high process consumption, low efficiency, insufficient function integration and the like in the prior art are systematically solved.

The invention relates to the technical field of concrete, in particular to environment-friendly lightweight aggregate concrete and a preparation method thereof. The environment-friendly lightweight aggregate concrete provided by the invention comprises the following raw materials in parts by weight: 60-70 parts of cement; 15 to 25 parts of modified glass micro powder; 15 to 25 parts of fly ash; 80 to 120 parts of waste brick recycled aggregate; 20 to 40 parts of ceramsite; 0.18 to 0.54 part of waste polypropylene fiber; 25-35 parts of water and 0.9-2.1 parts of a water reducing agent. According to the environment-friendly lightweight aggregate concrete provided by the invention, the modified glass micropowder and the waste polypropylene fiber are added into an original concrete formula, so that the strength and durability of the concrete are improved, and efficient synergistic utilization of three types of construction wastes (waste bricks, glass and polypropylene) can be realized.

The present invention provides a composite gasification device based on a filtration combustion mode, belonging to the technical field of solid fuel gasification for producing synthesis gas. It solves the problems of low carbon conversion efficiency, high tar content, and low synthesis gas yield. It includes a gasifying agent inlet, a preheating section, a reaction section, a reforming section, a synthesis gas outlet, and a discharging section. The gasifying agent inlet is communicated with the preheating section. Both ends of the reaction section are respectively communicated with the preheating section and the reforming section. The synthesis gas outlet is communicated with the reforming section. The discharging section is communicated with the reaction section. Both the preheating section and the reforming section are composed of various forms of inert porous medium fillers. The internal of the porous medium packed bed has complex pore channels, which is beneficial to mass transfer and heat transfer. The porous medium can be composed of inert particles such as ceramsite or glass microspheres and similar substances, wire meshes, and foam ceramics, etc. It is mainly used for the efficient gasification of various solid fuels.

The invention provides lightweight high-strength ceramsite and a preparation method thereof, and relates to the technical field of metallurgical industry solid waste recycling. According to the lightweight high-strength ceramsite provided by the invention, the steel slag is taken as a main raw material, the smelting slag and the coal gangue are taken as auxiliary materials, after reasonable proportioning and mixing, grinding and screening are performed, a ceramsite green body is prepared, after drying, the green body is put into a high-temperature kiln to be roasted, and finally a cooled ceramsite product is obtained. In the process, the smelting slag is used as a material which is rich in silicon and aluminum elements and has certain viscosity, so that the problem of poor plasticity of the steel slag can be solved, the quality of the ceramsite can be effectively improved, and the strength of the ceramsite green body can be improved; the coal gangue provides carbon elements and can provide heat for a roasting section, so that the reduction of energy consumption is facilitated. Due to the addition of silicon and aluminum elements, the final mineral phase is ordinary pyroxene, the cylinder compressive strength of the sintered ceramsite is increased, and the water absorption rate of the sintered ceramsite is reduced.

The invention provides a ceramsite proppant as well as a preparation method and application thereof. The method comprises the following steps: grinding a coal gangue raw material, pre-sintering, cooling and then grinding again; grinding the tungsten tailing sand, the low-grade bauxite, the carbide slag and the clay; grinding after mixing the raw materials; the raw materials comprise 45-60 parts of low-grade bauxite, 20-35 parts of pre-sintered coal gangue, 15-20 parts of tungsten tailing sand, 1-5 parts of carbide slag and 7-14 parts of clay; the total amount of the low-grade bauxite, the pre-sintered coal gangue and the tungsten tailing sand is 100 parts; granulating and drying; carrying out first sintering at 800-950 DEG C; second sintering is conducted at the temperature of 1050-1200 DEG C; and naturally cooling to obtain the ceramsite proppant. The technical problem to be solved is how to realize high-valued utilization of mine solid waste and low-grade bauxite, reduce dependence on high-quality bauxite and production cost, reduce sintering energy consumption and carbon emission, reduce product body density and improve key performance such as strength and sphericity of the proppant by optimizing raw material combination and a preparation process. And the requirements of oil and gas field fracturing operation are met.

The present invention discloses a high-strength ceramsite based on industrial solid waste and a preparation method thereof, belonging to the technical field of solid waste treatment. The present invention is made of bayer red mud, molybdenum slag, bauxite, spodumene, polyaluminum and industrial starch. It requires less raw materials, and the main materials are industrial solid waste bayer red mud and molybdenum slag, which are easy to obtain and beneficial to the recycling of solid waste, reducing environmental pollution. By the reduction magnetic separation method, the Fe 2 O 3 content is reduced to avoid strength reduction. By roasting activation and adding clay powder to increase the Si / Al ratio, a uniform and dense composite geopolymer is obtained, reducing the expansion of raw material reaction and improving the strength of ceramsite. Bauxite, red mud and molybdenum slag form mullite phase and a small amount of corundum phase at high temperature, making the ceramsite have high strength. Spodumene not only acts as a flux but also helps to form mullite at a lower temperature to increase the strength of the green body, reducing the sintering temperature and firing cycle.

The utility model relates to a sponge city bridge mid-division zone planting structure with a water storage function, which comprises a planting soil layer, a first geotechnical cloth layer, a coarse sand layer and a ceramsite layer which are sequentially paved in a mid-division zone from top to bottom, and further comprises a second geotechnical cloth layer, a grating frame, a plurality of water cotton ropes, an overflow pipe and an overflow pipe grate, the grid frame is arranged at the bottom of the bridge median strip, the ceramsite layer is filled in the grid frame, the second geotechnical cloth layer is arranged between the planting soil layer and the inner side wall of the bridge median strip and between the coarse sand layer and the upper end of the grid frame, and the water cotton rope is arranged in the ceramsite layer in the grid frame below the second geotechnical cloth layer. The overflow pipe is pre-buried in a side wall retaining wall of the bridge mid-division zone, and the overflow pipe grate is arranged at one end, located on the inner wall of the mid-division zone, of the overflow pipe in a communicating manner. By additionally arranging the geotechnical cloth, the water cotton rope and the grating frame, the problems of planting soil layer loss and damage of plant root systems to a bridge waterproof layer can be solved, manual irrigation and natural rainwater can be stored, the plant planting environment is improved, and the ecological benefits of sponge are increased.

The invention relates to the technical field of building materials, in particular to a high-temperature-resistant sintered perforated brick and a sintering process thereof. The problem that the existing porous brick is poor in durability is solved. The synthetic raw materials comprise coal gangue, shale, ceramsite, clay, bentonite tailing powder, fly ash, a modified retarder, composite sulfate and composite fibers. The preparation method comprises the following steps: grinding coal gangue, shale, ceramsite, clay and bentonite tailing powder to obtain mixed material slag I, carrying out ball-milling mixing on fly ash, a modified retarder, composite sulfate and composite fibers to obtain mixed material slag II, then mixing the mixed material slag I and the mixed material slag II, and carrying out extrusion molding treatment, and after drying, carrying out segmented sintering treatment to obtain the porous brick. The finally obtained porous brick is low in heat conductivity coefficient, high in density, free of scumming, high in compressive strength and suitable for being applied to multiple scenes.

The invention belongs to the technical field of building materials, and particularly relates to high-strength porous ceramsite and a preparation method thereof. The high-strength porous ceramsite is prepared from the following raw materials in parts by weight: 30 to 50 parts of secondary aluminum ash, 20 to 40 parts of electroplating sludge, 5 to 10 parts of fly ash, 10 to 20 parts of bentonite, 5 to 10 parts of fluxing agent and 5 to 10 parts of binder, the preparation method comprises the following steps: (1) uniformly mixing secondary aluminum ash, electroplating sludge, fly ash and bentonite, spraying water, continuously stirring, adding a fluxing agent and a binder, uniformly stirring, and aging; and (2) feeding the aged material into a rotary kiln through a screw conveyor, drying, granulating, sintering, and finally cooling. The secondary aluminum ash and the electroplating sludge are taken as main components, and are combined with the fly ash, the bentonite and other auxiliaries, so that the porous ceramsite with relatively high strength is finally obtained.

The invention relates to high-strength lightweight concrete and a preparation method thereof, and belongs to the technical field of concrete. The lightweight high-strength concrete is prepared from the following components: 300 to 340 parts of slag cement, 250 to 280 parts of expanded perlite micro powder, 10 to 15 parts of modified ceramsite, 20 to 30 parts of polypropylene fiber, 60 to 100 parts of silica fume, 10 to 15 parts of a water reducing agent, 3 to 7 parts of a foaming agent and 220 to 300 parts of water. The lightweight high-strength concrete prepared in the invention ensures the lightweight of the concrete, and the mechanical strength of the lightweight concrete is significantly improved at the same time.

The invention belongs to the technical field of water treatment materials, and particularly relates to a coal gasification slag unfired ceramsite filter material as well as a preparation method and application thereof. The coal gasification slag thermal insulation material comprises the following raw materials in parts by weight: 67.5-95 parts of coal gasification slag, 5-15 parts of active powder, 0-20 parts of metakaolin, 2-8 parts of expanded perlite, 0.1-0.5 part of a foam stabilizer and 1-3 parts of a foaming agent. The unfired ceramsite filter material has the advantages of being reusable, green and environment-friendly in preparation process, low in follow-up treatment cost, capable of being reused after failure and the like.

The utility model relates to a ceramsite sand drying device which comprises a drying cylinder, two ends of the drying cylinder are fixedly connected with supports, the supports are rotatably connected with a stirring shaft, the stirring shaft rotates in the drying cylinder, the stirring shaft is fixedly connected with a plurality of stirring blades, an electric heating body is evenly wound on the drying cylinder, one end of the drying cylinder is provided with a feeding port, and the other end of the drying cylinder is provided with a discharging port. And a discharge hole is formed in the other end of the drying cylinder. According to the ceramsite sand drying device, the electric heating bodies which are uniformly arranged are matched with the stirring blades, so that the temperature in the drying cylinder is uniform, ceramsite sand is dried and heated uniformly through stirring, and the situation that the quality and the drying efficiency of the ceramsite sand are affected due to non-uniform drying is avoided.

The invention relates to the technical field of oil and gas exploitation, discloses a low-density high-strength ceramsite proppant as well as a preparation process and application thereof, and aims to solve the technical problem that the density and the strength of an existing ceramsite proppant are mutually restricted. The proppant has a core-shell structure with an inner core and an outer shell. The inner core is formed by sintering a first material containing bauxite, clay, a composite pore-forming agent and a carbon-silicon precursor and is used for forming a loose and porous low-density structure, and silicon carbide whiskers are generated in situ in the loose and porous low-density structure for reinforcement. The shell is formed by sintering a second material containing bauxite, clay and zircon sand and is used for forming a compact and high-strength protective layer and generating zirconium oxide particles in situ in the protective layer for toughening. The preparation process comprises the following steps: preparing core-shell structure green pellets by a two-step method, and adopting a double-atmosphere program temperature control sintering process of medium-temperature reduction and high-temperature oxidation. According to the invention, through the combination of the structure zoning and the zoning in-situ enhancement technology, the prepared proppant has ultralow density and excellent crushing resistance.