262 results about "Expanded clay aggregate" patented technology

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 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 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 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 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 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.

The invention relates to the field of building materials, in particular to a preparation method of high-strength ceramsite, which comprises the following steps: uniformly mixing brick powder, Bayer process red mud, ardealite and titanium gypsum to obtain mixed powder, adding a binder, uniformly mixing to prepare raw nodules, sequentially forming a transition layer and a shell layer on the surfaces of the raw nodules, drying, sintering and cooling to obtain the high-strength ceramsite. The prepared ceramsite is low in water absorption rate and excellent in mechanical strength, the core-shell structure can effectively inhibit release of chloride ions, solid waste is fully utilized, environmental pressure is relieved, waste is turned into wealth, two purposes are achieved, and the ceramsite has certain social, economic and ecological benefits.

The utility model belongs to the field of sponge city construction, and particularly relates to a rainwater garden system for sponge city construction, a permeation area in a foundation pit of the rainwater garden system sequentially comprises a water storage layer, a covering layer, a planting soil layer, an artificial filler layer, a sand layer and a gravel layer from top to bottom, and the high porosity of water storage ceramsite is utilized, so that the water purification and storage performance is good; through mutual cooperation of all the layers, rainwater is effectively purified and stored, and the water quality and the water storage amount of the rainwater garden system are improved. In addition, the rainwater garden system is simple in structure and convenient to construct and maintain in the later period.

The invention discloses a lightweight high-strength concrete thermal insulation wallboard for a high-rise building and a preparation method of the lightweight high-strength concrete thermal insulation wallboard. The lightweight high-strength concrete thermal insulation wallboard comprises the following raw materials in parts by weight: 300-500 parts of cement, 60-90 parts of slag powder, 60-100 parts of silica fume, 60-90 parts of microbeads, 100-200 parts of floating beads, 500-900 parts of modified lightweight aggregate, 15-20 parts of alkali-resistant glass fibers, 25-40 parts of a water reducing agent and 180-220 parts of water. According to the invention, a layer of'hard shell 'is formed on the surface after the shale ceramsite is wrapped and reinforced by the light cement paste, the problem of high water absorption rate of the shale ceramsite is improved, meanwhile, the mechanical property of the shale ceramsite is improved, secondly, the self-made lightweight aggregate is low in water absorption rate and high in strength, the density of the self-made lightweight aggregate is close to that of a gelling matrix of the thermal insulation wallboard, and the aggregate can be prevented from floating or sinking; the floating beads are added into the modified lightweight aggregate, so that the prepared lightweight wallboard is good in homogeneity, low in water absorption and good in mechanical property, the weight of the wallboard can be reduced through cooperation of the floating beads in the thermal insulation wallboard and the modified lightweight aggregate, meanwhile, the floating beads have excellent fire resistance and heat insulation performance, and the heat insulation and fire resistance of the lightweight wallboard can be improved through cooperation of the floating beads and the alkali-resistant glass fibers with the high melting temperature.

The application discloses a kind of regenerated spherical ceramsite sand and its preparation process, sand blasting process, and relates to the field of metal surface treatment.It includes the following steps: the recyclable abrasive is prepared by sintering process to regenerate spherical ceramsite sand;The recyclable abrasive is obtained by sorting method from sandblasting abrasive.Through multi-stage sand blasting method to workpiece sand blasting treatment, including the following contents: first stage, 0.6~0.8MPa pressure, 60~75° incident angle is carried out rough spraying;Second stage, 0.3~0.5MPa pressure, 75~85° incident angle is carried out fine spraying;Third stage 0.1~0.2MPa pressure, 85~90° incident angle is carried out fine adjustment.The application realizes the efficient resource utilization of waste abrasive by efficient recovery sorting and internal regeneration cycle, solves the environmental pollution problem caused by waste abrasive stockpiling and disposal;Multi-stage sand blasting process avoids excessive treatment and repeated operation, and the optimized abrasive combination and dynamic sand blasting parameters ensure the high uniformity and controllability of workpiece surface cleanliness and roughness.

The application provides a kind of stack type light weight high strength concrete material and its preparation method.The application is filled in the mold by stacking ceramsite, and the ceramsite fills the mold in a close-packed manner;Then, according to the preset weight fraction, the cement, silica fume, saw mud, fly ash floating bead, hollow glass microsphere, fly ash, water reducing agent and water are weighed, and the high fluid light weight high strength mortar is obtained after fully mixing, and it is poured into the mold filled with ceramsite, so that the high fluid light weight high strength mortar fills the gap between the ceramsite, and the light weight high strength concrete material is obtained after curing. Through the above-mentioned manner, the application can prepare the high fluid light weight high strength mortar with slightly lower density than the ceramsite, to ensure that the pouring process will not appear the phenomenon of ceramsite floating, and effectively utilize the space skeleton formed by the mutual lap of ceramsite in the stacking process to effectively improve the strength of the concrete, so that the prepared stack type light weight high strength concrete material has low bulk density and high strength.

The application provides a water-permeable asphalt composition and a preparation method thereof, and the composition comprises the following components and mass fractions: 22-28 parts of base asphalt, 65-75 parts of modified composite aggregate, 3-4 parts of interface reinforcing agent, 1-2 parts of nano anti-aging agent, and 0.3-0.5 parts of antioxidant dibutyl hydroxytoluene, wherein the modified composite aggregate is compounded by basalt coarse aggregate, ceramsite fine aggregate and recycled glass microbeads at a mass ratio of 5-7:3-5:1. Through the synergistic effect of the multistage aggregate compounding system, the bio-based interface reinforcing technology and the nano drug-loaded anti-aging process, the mechanical strength and durability are significantly improved while the high water permeability is maintained, and the low-temperature modification and solid waste recycling technology are used to realize the environment-friendly and low-consumption production.

The invention relates to the field of building materials, in particular to SAP functional aggregate for concrete, a preparation method of the SAP functional aggregate and a preparation method of the concrete. The SAP functional aggregate for concrete comprises coal gangue ceramsite, the coal gangue ceramsite comprises a ceramsite core with a porous structure, SAP particles are adsorbed on the ceramsite core, the periphery of the coal gangue ceramsite is coated with a packaging film, and a composite polymer is formed by mixing polyvinyl alcohol and epoxy resin. The coal gangue ceramsite with a porous structure is used as a core for absorbing SAP particles, and then the water absorption rate is limited through a packaging film; when the functional aggregate is used in concrete, the packaging film realizes slow and controllable release of water, the hydration process is physically regulated and controlled, and a heat release curve is slowed down; the problems that in the prior art, the SAP is directly added into the concrete, so that the SAP rapidly absorbs a large amount of water, and consequently the workability of the concrete is lost, and the mechanical property is degraded are solved.

The utility model discloses integrated mould pressing assembly type graded filtration sewage purification tank, including the sedimentation tank, ecological purification tank and filter tank that are connected in proper order through splicing component, the sedimentation tank, ecological purification tank and filter tank are connected in proper order through the pipeline and are led on between, ecological purification tank inside swing joint has the filler box, and the filler box is filled with coarse sand, ceramic granule and gravel from top to bottom in proper order inside, the filter tank inside swing joint has the hollow fiber membrane and reverse osmosis membrane, the utility model discloses structure design is reasonable, and the convenient nature of assembly of the tank body structure of splicing type has been effectively improved to sewage purification tank, has also reduced the use and maintenance cost of purification tank simultaneously, and further improved sewage filtration processing efficiency.

The utility model discloses a rotary kiln for producing ceramsite sand, which comprises a base, a kiln body is arranged above the base, two symmetrically arranged rotating seats are arranged at the upper end of the base, rollers are rotatably connected in the two rotating seats, a guide rail is arranged on the outer wall of the kiln body, the two rollers are matched with the guide rail, and the guide rail is arranged on the outer wall of the kiln body. A guide rail is arranged on the base, a box body is arranged above the kiln body, a water dropper is arranged at the lower end of the box body and located over the guide rail, a fixing frame is arranged at the upper end of the base, a lifting mechanism used for lifting the box body is arranged at the upper end of the fixing frame, a fixing plate is arranged at the upper end of the box body, and a feeding mechanism used for feeding materials to the box body is arranged at the upper end of the fixing plate. The lubricant in the storage box quantitatively falls into the box body from the through groove and then drips on the guide rail through the dripper, so that automatic lubrication of the guide rail and the roller is realized, and convenience is brought to people.

The invention belongs to the field of ceramsite proppant calcination, and particularly relates to a preheating calcination method of a ceramsite proppant. Comprising the following steps: S11, carrying out heat exchange on water-containing ceramsite raw material balls and first waste gas from a rotary kiln in a preheater to obtain a preheated semi-finished product; s12, the preheated semi-finished product is fed into the rotary kiln to be calcined, and ceramsite proppant clinker is obtained; and step S13, carrying out quenching treatment on the ceramsite proppant clinker to obtain a ceramsite proppant finished product. Wherein the first waste gas is flue gas generated in the calcining process of the rotary kiln. Therefore, the problem that waste gas discharged from the kiln tail of an existing rotary kiln carries a large amount of heat energy and cannot be fully utilized is solved.

This invention relates to a heavy ceramsite, particularly a low-carbon, low-cost, sinter-free, moisture-free, high-density heavy ceramsite that can treat large quantities of various solid wastes and replace offshore wind power ballast. It comprises the following components: solid waste-based cementitious material, carbonized steel slag powder, and municipal sewage treatment sludge. The carbonized steel slag powder includes the following components: steel slag powder, water, EDTA-2Na, and tea saponin. By introducing EDTA-2Na and tea saponin, the carbon dioxide absorption capacity of the steel slag powder is extremely high, reaching 22%, resulting in a low-carbon and environmentally friendly product; the density of the heavy ceramsite can reach 2.95 g / cm³. 3 It is spherical and has a continuous gradation, which makes it more erosion resistant than natural stone. The raw materials are all solid waste materials that are difficult to process, and it can process a variety of solid wastes in large quantities. Because it does not require sintering, it is more low-carbon and environmentally friendly.

The invention belongs to the technical field of environmental protection and resource recycling, and particularly relates to a method for preparing hollow ceramsite from waste water-based rock debris, the hollow ceramsite and application. The method comprises the following steps: 1) sorting, washing, drying and crushing the waste water-based rock debris, mixing the crushed waste water-based rock debris with water, ball-milling into a homogeneous suspension A with the particle size of less than 20 microns, and ball-milling a foaming agent into powder B with the particle size of less than 20 microns; 2) mixing the homogeneous suspension A and the powder B according to a mass ratio of 100: (4-10), and carrying out ball milling to obtain a mixture C; 3) carrying out spray drying granulation on the mixture C to obtain a green body D; and 4) performing two-step sintering on the green body D through a rotary furnace to obtain the hollow ceramsite with the particle size of less than 30 microns. The hollow ceramsite prepared by the invention has the advantages of high strength and low density, and has multiple application values.

The invention discloses an armored sand-ceramsite bimodal proppant based on performance matching as well as a preparation method and application thereof, and relates to the technical field of oil and gas exploitation. The proppant comprises ceramsite and armored sand which are compounded according to the mass ratio of (20: 80)-(60: 40), the volume density ratio of the ceramsite to the armored sand is 0.9-1.1, the median particle size ratio of the ceramsite to the armored sand is 1.5-3.0, it can be ensured that the proppant is evenly and stably conveyed to a target crack, the ceramsite forms a bearing framework, gaps are filled with the armored sand, and a synergistic and stable composite supporting structure is constructed. According to the proppant, the four-in-one performance matching design of volume density, breakage rate, acid solubility and particle size is adopted, the obtained proppant is superior to a conventional proppant in breakage resistance, acid corrosion resistance and long-term flow guide performance, the preparation cost is low, the defects of performance mismatch, system failure and the like of the conventional proppant can be overcome, and the proppant has wide application prospects in hydraulic fracturing construction of oil and gas fields.

The invention belongs to the technical field of solid waste recycling, and particularly relates to a ceramic material and a preparation method thereof. The ceramic material comprises the following raw materials: coal gasification slag, clay and an inert heat storage medium material. The preparation method of the ceramic material has the beneficial effects that inorganic components in the coal gasification slag are changed into high-value ceramsite products, the organic components provide heat required by reaction and simultaneously prepare CO raw material gas required by chemical engineering, and the utilization way of the coal gasification slag is widened.

The application provides a coal gangue mixed firing method, which comprises the following steps: pretreating coal gangue materials to screen coal gangue raw materials with different particle sizes, collecting coal gangue raw materials with particle sizes in a first preset range as gravel raw materials; collecting coal gangue raw materials with particle sizes in a second preset range and a heat value reaching a first preset heat value as water-retaining ceramic aggregate raw materials, and making the water-retaining ceramic aggregate raw materials into water-retaining ceramic aggregate semi-products; mixing and firing the gravel raw materials and the water-retaining ceramic aggregate semi-products, and screening after the mixing and firing to obtain gravel products and water-retaining ceramic aggregate products; and the value of the first preset range is greater than the value of the second preset range, so as to solve the problem of waste caused by directly discarding part of the coal gangue which is not suitable for making gravel after screening in the prior art.

The invention discloses self-repairing lightweight aggregate concrete and a preparation method thereof. The self-repairing lightweight aggregate concrete comprises the following components in percentage by mass: 20-30% of cement; 40-50% of standard sand; 15 to 25 percent of packaging ceramsite; 8-12% of water; the encapsulated ceramsite comprises 30-35% of ceramsite, 30-35% of a repairing agent sodium silicate aqueous solution, 10-12% of an encapsulating material and 23-25% of a dispersing material. Performance tests show that the self-repairing lightweight aggregate concrete provided by the invention has very strong self-repairing capability.

The utility model provides a smoke chamber material separation device for a ceramsite sand rotary kiln, and relates to the technical field of material separation, the smoke chamber material separation device comprises a cyclone separator main body, a spiral gas transmission cavity is arranged at the upper part in the cyclone separator main body, and the cyclone separator main body, an exhaust pipe, a strip-shaped hole and a filter screen are matched for use, so that the separation of materials is facilitated; during operation, the gas inlet pipe of the cyclone separator main body is communicated with an outlet of a smoke chamber of the rotary kiln, gas containing solids enters the cyclone separator main body and then is conveyed by the spiral gas conveying cavity, and large-particle materials are separated from smoke by the spiral gas conveying cavity through centrifugal force. Separated materials fall into a collecting hopper below through a second drain outlet in the bottom end, gas enters an exhaust pipe through a strip-shaped hole and then is exhausted through the exhaust pipe, meanwhile, a filter screen is arranged on the surface of the strip-shaped hole, solid-gas separation is further facilitated, the mode is easy to operate, and material separation is facilitated.

The invention discloses radiation shielding type high-strength ceramsite based on lead-zinc ore tailings and a preparation method of the radiation shielding type high-strength ceramsite, and relates to the technical field of radiation protection concrete. The lead-zinc ore tailings containing more Pb elements are used as main ceramic forming raw materials, a proper amount of lead-rich raw materials are used as auxiliary materials to adjust the content of the Pb elements, a proper amount of boron-rich raw materials are used as auxiliary materials to adjust the content of the B elements, and the composite powder with the proper content of the Pb elements and the proper content of the B elements is prepared. The efficient shielding effect of the Pb element and the B element on gamma rays and neutron radiation is fully exerted, and the sintering temperature of the ceramsite is remarkably reduced. In addition, a proper amount of fly ash floating beads with spheroidal cavity structures are introduced as a pore-forming template, so that the purpose of regulating and controlling the density grade of the ceramsite is achieved, and the problem that the concrete structure is not uniform due to the fact that the density of aggregate is not matched with that of a cementing material is solved. The prepared ceramsite has relatively high strength and a good radiation shielding coefficient, and has a density similar to that of a cementing material.

The invention provides a roasting furnace cooling flue gas circulation furnace cover device for preparing ceramsite from a carbon-containing raw material, and belongs to the technical field of ceramsite firing. Comprising a belt type roasting furnace body, a furnace cover, an air blower, a first conveying pipe and a second conveying pipe, and the outer wall of the second conveying pipe is fixedly connected with a communicating pipe and a third conveying pipe; and the adjusting assembly is used for changing air return paths in the first conveying pipe and the second conveying pipe, and the adjusting assembly is connected with the fixing ring. By arranging the adjusting assembly, hot air of the first cold section is directly conveyed to the target preparation section, on one hand, resistance and loss of the hot air in the upper cover are avoided, and on the other hand, the flow of the hot air entering all the preparation sections from the first conveying pipe can be directly controlled by adjusting an opening of the valve disc; and the number of connected pipelines in the whole system is reduced, the layout is simplified, the air return efficiency is improved, and stable operation of a cooling flue gas circulation system is more powerfully guaranteed.

The application relates to the technical field of concrete materials, in particular to a UHPC high-performance lightweight concrete material-based truck scale and a preparation method thereof. The load-bearing main body of the truck scale is made of UHPC high-performance lightweight concrete material with a specific formula, and the material is composed of the following raw materials: cement, silica fume, hollow glass microbeads, fly ash floating beads, shale ceramsite, steel fiber, water reducing agent, water, high molecular water absorbing resin and talcum powder. Through material formula innovation and preparation process optimization, the application can significantly reduce the material density while maintaining the UHPC ultra-high strength and high durability, improve the cushioning energy consumption capacity, flexibility and construction fluidity, reduce the transportation and installation cost and prolong the service life. The application has excellent frost resistance and impermeability and is suitable for multiple scenes such as logistics storage, mines, bridge toll stations and the like, and solves the technical problems of the traditional truck scale, such as excessive self-weight, insufficient durability, poor flexibility and limited impact resistance.

This invention relates to the technical field of dust collectors, and discloses a bag filter dust collector for sintering waste gas treatment and a process for preparing fracturing proppant ceramsite sand. The bag filter dust collector for sintering waste gas treatment includes a dust filter chamber, a dust collection chamber below the dust filter chamber, and a dust filter unit. The dust filter unit includes a pair of parallel and vertically arranged support plates, a horizontal plate below the support plate, and multiple dust filter components arranged horizontally on the support plates. Each dust filter component includes a polygonal prism-shaped filter cartridge, with a support inside the cartridge containing multiple parallel support ribs. During dust filtration, the filter cartridge and support are in a torsional posture. This device significantly improves the dust collection capacity per unit volume by increasing the surface area and pleat density of the filter material, resulting in a higher filtration efficiency than traditional cylindrical filter cartridges. The pulsed airflow excites the reciprocating torsional vibration of the filter cartridge, which, combined with the energy storage effect of the inertial disk and conical spring, increases the dust shedding rate.