659 results about "Stone dust" patented technology

The invention discloses a plastic floor base material prepared from recycled PET, and relates to the technical field of floors, the base material is prepared by mixing a recycled PET material, stone powder, a chain extender, stearic acid, an oil body and an elastomer, the recycled PET material accounts for 15%-25%, the stone powder accounts for 65%-78%, the chain extender accounts for 0.4%-1%, the stearic acid accounts for 0.5%-2%, and the oil body accounts for 1%-3%. According to the present invention, the recycled PET is adopted as the adhesive to adhere the stone powder, and extrusion molding is performed through the extruder to prepare the plastic floor base material, such that the GRS and SCS certified products can be easily obtained, the PET product cannot be decomposed into the chlorine gas and the hydrogen chloride with the pungent odor like the conventional PVC plastic floor base material, and the recovered PET material has the more sources, such that the production cost is low, and the production efficiency is high. And the market is wider.

The invention relates to a concrete composition, concrete as well as a preparation method and application of the concrete. The concrete composition comprises the following components: coal gangue aggregate, a gel material and a water reducing agent, the coal gangue aggregate comprises crushed coal gangue, a coarse coal gangue material and coal gangue stone powder, and the average particle size of the coarse coal gangue material is larger than that of the coal gangue stone powder and smaller than that of the crushed coal gangue; the gel material comprises slag, gypsum and carbide slag. According to the concrete composition, the coal gangue of different grades is adopted as the aggregate and compounded with the gel material and the water reducing agent to prepare the concrete, all the raw materials have a synergistic effect, the durability, workability, crack resistance and other performance of the concrete are improved, the production cost is reduced, and the requirement of coal mine construction for high-performance concrete is met.

The invention provides ground self-leveling mortar based on copper tailing waste residues and a preparation method thereof, and the ground self-leveling mortar comprises the following components: 50 to 150 parts of 0 to 0.045 mm quartz stone powder, 50 to 150 parts of 0 to 0.075 mm copper tailing waste residue powder, 40 to 60 parts of 0.075 to 0.15 mm copper tailing waste residue, 150 to 200 parts of 0.15 to 0.3 mm copper tailing waste residue, 30 to 60 parts of 0.3 to 0.6 mm copper tailing waste residue, 180 to 220 parts of 0.3 to 0.6 mm quartz sand, 230 to 270 parts of P.O42.5 cement, 80 to 120 parts of sulphoaluminate cement and 20 to 40 parts of anhydrite. The concrete is prepared from the following components in parts by weight: 0.8-0.9 part of tartaric acid, 6-8 parts of redispersible latex powder, 0.6-0.8 part of cellulose ether, 0.8-1.0 part of a water reducing agent and 200-240 parts of water. According to the method, the residual tailing waste residues obtained after valuable minerals are recycled from the copper tailings are utilized, the copper tailing waste residues with different grain sizes can be blended to meet the use performance requirements of different ground self-leveling mortar, the process is simple, the production cost is low, all-component resource utilization of the copper tailing waste residues can be achieved, the application range is wide, consumption of natural gravel is reduced, and the production cost is reduced. High-added-value utilization of the copper tailing waste residue powder is achieved, the treatment problem of the copper tailing waste residues is effectively solved, and the environmental and economic benefits are remarkable.

The invention provides a ceramic tile and a preparation method thereof, the green body of the ceramic tile comprises the following raw materials by mass: 30%-35% of raw slime, 33%-38% of a stone powder raw material, 23%-28% of a medium temperature sand raw material, 2%-4% of magnesia soil, 0.1%-0.2% of ceramic waste ink, 0.8%-1.0% of water glass, and 0.06%-0.1% of an F-02 dispersant. According to the invention, the ceramic waste ink is added into the formula of the green body, so that the recycling of the waste ink is realized, the production cost is saved, the cost for treating the waste ink is saved, and the problem of serious resource waste caused by incapability of recycling the ceramic waste ink is avoided.

The invention discloses an intelligent adjusting type stone powder screening device, and belongs to the technical field of stone powder screening, the intelligent adjusting type stone powder screening device comprises an outer shell, a plurality of screening drums are connected to the interior of the outer shell from top to bottom, and vibration assemblies are arranged at the bottoms of the screening drums. According to the stone powder screening device, by arranging the dispersing and discharging assembly, stone powder accumulated unevenly in the screen drum can be spread and dispersed, on one hand, the situation that the screening effect is affected due to mutual stacking and shielding of stone powder particles can be avoided, on the other hand, the evenly-spread stone powder can make contact with all the screen holes of the screen drum to the maximum extent, the screening area is increased, and therefore the screening efficiency is improved; meanwhile, a connecting ring drives a discharging auger to rotate through a first gear and a fixed gear ring, so that the discharging auger can convey residual stone powder on the screen drum to the peripheral side of the screen drum, and the residual stone powder can be discharged through a discharging pipe in cooperation with uniform spreading, scraping and sweeping of a dispersing roller, so that the discharging speed of the device is increased, accumulation of the residual stone powder can be avoided, and the working efficiency of the device is improved. The screening efficiency is improved.

The invention relates to a whole-body wear-resistant special granite ceramic tile for public places and a preparation method thereof. The ceramic tile comprises a polycrystalline-phase wear-resistant green body layer and a decorative wear-resistant layer, and a polycrystalline-phase wear-resistant green body comprises the following raw material components in percentage by weight: 8-15% of ball clay, 8-15% of high-whiteness kaolin, 10-15% of mixed mud, 0-5% of calcined talc, 3-6% of bentonite, 15-25% of potassium sodium stone powder, 8-15% of finely ground lithium tailings, 4-8% of calcined bauxite, 15-25% of fine corundum powder and 0-5% of superfine zirconium silicate. 0-5% of high-purity anatase titanium dioxide powder, 0-1% of a green body reinforcing agent and 1-3% of a dispergator. According to the invention, the polycrystalline phase green body is sintered at high temperature to generate the high-hardness wear-resistant decorative layer, so that the product not only has the properties of high hardness and good wear resistance of natural granite, but also has the physical and chemical properties of pollution resistance, strength, radioactivity and the like, and perfectly presents the texture effect of granite stone.

The invention discloses a preparation process and application of a modified anti-segregation admixture for machine-made sand, and relates to the technical field of polymer modified materials. Modified polyoxyethylene ether and vinyltrimethoxysilane are adopted to construct a steric hindrance effect, styrene-acrylate emulsion is introduced to form an interpenetrating network structure, and nano silicon dioxide and bentonite are cooperated to construct a multi-scale enhancement system. Silane coupling agent hydrolysis and nano grafting reaction are realized through gradient heating, and the particle size distribution D90 of the emulsion is less than or equal to 5 microns by combining an ultrasonic-mechanical synergistic emulsification process. A three-dimensional network is formed by the composite thickening agent and anhydrous sodium sulfate, and after in-situ curing at 25 DEG C with RH greater than or equal to 80%, 0.1-0.5% of the additive is added, so that the slump retention value of the machine-made sand concrete is greater than 315mm (1h), the pressure bleeding rate is less than or equal to 9.7%, the 28d compressive strength is improved by 24.5-72.6 MPa, and the segregation resistance coefficient is reduced to 0.08-0.11. The technology breaks through the limitation of insufficient adaptability of traditional admixtures to machine-made sand, and is particularly suitable for long-distance pumping construction of high-stone-powder-content machine-made sand concrete.

The utility model relates to an efficient and environment-friendly machine-made fine sand production system which comprises a bar type feeder, a screen feed opening of the bar type feeder is connected to a linear vibrating screen I, and a screen feed opening of the bar type feeder is connected to a jaw crusher; a feed opening of the jaw crusher and an oversize feed opening of the linear vibrating screen I are connected to the intermediate crushing cone crusher, and a feed opening of the intermediate crushing cone crusher is connected to the linear vibrating screen II; screen discharge ports of the linear vibrating screen I and the linear vibrating screen II are connected to a trough type sand washer, a clean sand outlet of the trough type sand washer is connected to a rod mill, and a discharge port of the rod mill is connected to a high-frequency dewatering screen. A slurry outlet of the groove type sand washer and a slurry opening of the high-frequency dewatering screen are sequentially connected to a high-efficiency thickener and a plate-and-frame filter press. The dry-wet combined sand making process system is high in sand forming rate, quality indexes such as mud content, water content, grading and stone powder content of finished product sand can be well controlled in the sand making process, and the quality of finished product machine-made fine sand is improved.

The invention discloses composite paste slurry suitable for pretreatment of a pier pile foundation in a karst area and a preparation method and a grouting method of the composite paste slurry, the composite paste slurry is based on the filling design of part of a karst cave but not the whole karst cave, cement, slurry, stone powder and a composite additive are prepared into semi-solid slurry with the slump of 5-10 cm, and the composite paste slurry has underwater anti-dispersion performance, the composite admixture is composed of a first admixture and a second admixture in a mass ratio of 1: 1; each cubic meter of the composite paste slurry comprises the following components by mass: 200 to 300 kg of cement, 550 to 780 kg of slurry and 820 to 1200 kg of stone powder, and the addition amount of the first additive and the second additive is 0.6 to 1% of the weight of the cement. The problems that when an existing pretreatment grouting technology is used for treating the karst problem of the bridge pier, the number of drilled holes is large, the reinforcing effect is common, cost is high, the environment is polluted, and adaptability to complex geology is insufficient are solved.

The invention relates to the field of concrete design, and particularly discloses stone powder-containing machine-made sand concrete and a corresponding mix proportion design method. The method comprises the steps that the use amount of coarse aggregate, fine aggregate and a cementing material of concrete is calculated, the fine aggregate stone powder-containing machine-made sand is subjected to rapid screening, the stone powder content of the fine aggregate stone powder-containing machine-made sand is measured, all the stone powder-containing machine-made sand is counted into the cementing material, part of cement, fly ash and mineral powder are replaced, a cementing system is formed, 10%-20% of the cement is replaced with the cement, and the remaining part of the cement is replaced with the fly ash and the mineral powder; calculating a strength influence coefficient under the specific cement replacement ratio of the stone powder by adopting a formula gamma Lf =-3.16 x-0. 048 x + 1, and calculating the mortar strength of the gelling system according to the strength influence coefficient; and adjusting and determining the water consumption meeting the preparation strength requirement, and finally determining the dosage of each component of the concrete. The stone powder in the powder-containing machine-made sand serves as a gelling component, efficient resource utilization of the machine-made sand with the high stone powder content is achieved, the use amount of cement and coal ash is reduced, and the problem that concrete is not low in carbon for a long time is solved.

The present invention discloses a method for preparing an acidic soil conditioner from mine waste stone powder, as well as its product and application. The preparation method includes: S1: mixing the mine waste stone powder with an adhesive, granulating and post-treating to obtain stone powder particles; S2: placing waste shells and aquatic product leftovers in an acidic solution, standing for activation, washing to neutrality and then drying for standby; S3: performing high-temperature carbonization and expansion treatment on the product dried in step S2 in an anoxic or oxygen-free environment to obtain biochar; S4: uniformly mixing the stone powder particles prepared in step S1, the biochar prepared in step S3, waste shells, livestock manure, potassium humate and auxin to obtain an acidic soil conditioner. The preparation method disclosed by the present invention uses mine waste stone powder, waste shells and aquatic product leftovers as raw materials, which can not only effectively improve soil problems, solve the problem of waste of waste resources, turn waste into treasure, but also will not cause secondary harm to the soil environment.

The utility model relates to a production line for preparing machine-made sand by using construction waste, which comprises a raw material crushing system, a screening system and a sand making system, and the raw material crushing system sequentially comprises a plate chain feeder, a jaw crusher and an impact crusher; the screening system comprises a first vibrating screen and a second vibrating screen, raw materials crushed by the impact crusher are conveyed to the first vibrating screen, the first vibrating screen is connected with a first aggregate bin and the second vibrating screen, and the second vibrating screen is connected with different second aggregate bins; the sand making system sequentially comprises a shaping sand making machine, a third vibrating screen and a powder selecting system, the shaping sand making machine is respectively connected with the first aggregate bin and the second aggregate bin, finished product machine-made sand and stone powder are selected through the powder selecting system, and the stone powder is conveyed to the powder bin.

The invention relates to the technical field of tunnel construction materials, and discloses a low-carbon impervious synchronous grouting material for a shield tunnel and a preparation method thereof.The low-carbon impervious synchronous grouting material for the shield tunnel is mainly composed of a low-carbon composite cementing material, fine aggregate, water and an additive, wherein the mass ratio of the low-carbon composite cementing material to the fine aggregate is 0.1-0.6, and the addition amount of the additive does not exceed 0.5%. According to the synchronous grouting material for the low-carbon anti-seepage shield tunnel and the preparation method of the synchronous grouting material, the synchronous grouting material for the low-carbon anti-seepage shield tunnel is prepared through a multi-solid-waste synergistic excitation enhancement technology, recycling of solid waste is achieved, multi-source solid waste such as cement, steel slag powder, mineral powder and fly ash is adopted for synergistic compatibility to prepare a low-carbon composite cementing material, and the low-carbon anti-seepage shield tunnel is good in comprehensive performance. The mechanical property of the synchronous grouting material can be improved, waste concrete or decoration waste is cooperatively adopted as the fine aggregate, the compactness of synchronous grouting can be improved through the stone powder content, and the anti-permeability performance is excellent.

The invention discloses a mine high and steep slope ecological restoration integrated system based on double-response gel and an ecological restoration method. The system comprises a three-channel rotational flow mixing bin, a pulse atomization spraying device and an AI visual control system, gradient spraying of erosion-resistant, nutrition and water-retention three-level matrixes is achieved, pulse atomization and YOLO-v8 driven crack recognition are matched, and the problem of'jet flow attenuation 'of a slope with the angle being 70 degrees or above in a traditional process is solved. The method comprises the following steps: preparing a pH-temperature double-response sodium alginate-chitosan gel seed bag, spraying according to a sequence of 10-15cm of a water retention layer, 20-40cm of a nutrition layer and 10-20cm of an anti-erosion layer, and performing multispectral inspection by using an unmanned aerial vehicle to realize dynamic maintenance. The matrix system takes stone powder porous particles, activated fly ash and other solid wastes as raw materials, the resource utilization rate of mine solid wastes is effectively improved, and the matrix system is suitable for repairing complex slopes in coastal areas, volcanic rocks, cold areas and the like.

The invention relates to the technical field of asphalt concrete production, in particular to a bag-type dust remover for stone dust recycling, which comprises a dust removal bin, a pattern plate is fixedly mounted on the upper side in the dust removal bin, a plurality of mounting holes are formed in the pattern plate, dust removal bags and a bag cage are mounted in the mounting holes, and an air outlet cylinder is rotatably mounted in the bag cage. A plurality of expansion units which are uniformly arranged up and down are mounted on the outer side of the air outlet cylinder, expansion rings are mounted on the expansion units, and the expansion rings are fixedly connected with the cloth bag cage; through radial expansion and retraction of the expansion ring, a hardened layer on the surface of the filter bag can be effectively broken, meanwhile, the subsequent pulse back-blowing dust removal effect is improved, and the dust recovery efficiency is ensured; when the dust collection bag is locally damaged, the dust collection bag can prevent dust-containing air flow from flowing out through the air outlet cylinder, so that the dust collection bag can still maintain a normal filtering function in other areas except the damaged position, thereby reducing environmental pollution and ensuring the dust collection efficiency.

The utility model relates to the technical field of cement stone powder processing, in particular to a cement stone powder production device. According to the technical scheme, the device comprises a grinding box, a control box and a crushing box, the crushing box is embedded in the left end of the top of the grinding box, a feeding hopper is installed at the top of the crushing box, two crushing rollers are longitudinally and rotationally installed in the crushing box side by side, and crushing teeth are evenly installed on the two crushing rollers in a staggered mode; two crushing roller rotating shafts penetrate through the rear side of the crushing box and are provided with gears, the two gears are meshed and linked, a grinding base is installed at the bottom end in the grinding box, second grinding teeth are evenly installed on the upper surface of the grinding base, a grinding barrel is rotatably installed in the grinding box, first grinding teeth are evenly installed on the surface of the grinding barrel, and the first grinding teeth and the second grinding teeth are designed in a staggered mode; and a discharging opening is formed in the right end of the bottom of the grinding box, and a discharging nozzle is installed at the discharging opening. According to the utility model, cement stone powder raw materials are crushed into fine particles to enter the grinding cylinder for grinding, the grinding is smooth, and the grinding efficiency and effect are improved.

The invention belongs to the technical field of building materials, and discloses a self-reaction type solid-waste-based road base material with a uniform and dense structure and a preparation method of the self-reaction type solid-waste-based road base material. The road base material comprises the following raw materials in parts by mass: 100 parts of solid waste-based aggregate, 3-5 parts of cement and 5-7 parts of an interface modifier, and the water content is controlled to be 14-19%; wherein the solid waste-based aggregate is prepared from the following raw materials in percentage by mass: 50 to 60 percent of granite stone powder, 20 to 30 percent of phosphogypsum, 5 to 10 percent of fly ash and 10 to 15 percent of fire coal slag. According to the invention, granite stone powder, ardealite, undisturbed fly ash and fire coal slag are taken as aggregates, a small amount of cement is taken as a cementing material, an interface modifier is combined, and based on the synergistic effect of an aggregate modification effect, a cementing effect of the cementing material and an aggregate self-reaction, the interaction force among all components in a base material is improved through chemical reaction; a traditional preparation mode that aggregate is solidified only through a cementing material is changed, and preparation of the solid waste-based road base material of the uniform and dense structure is achieved.

The invention relates to the technical field of tiles, in particular to an antiskid tile and a preparation method thereof. The anti-slip ceramic tile comprises a green body layer, an anti-slip layer and an anti-slip layer which are sequentially stacked, the green body layer is composed of lime, limestone powder, ceramic tile cement and the like; the anti-skid layer is composed of quartz stone powder, potassium feldspar, aluminum oxide and the like; the preparation method comprises the following steps: preparing the green body layer, preparing glaze slip of the anti-slip layer and the anti-slip layer, glazing and firing. By designing the three-layer structure and optimizing the raw material ratio and the preparation process, the ceramic tile plaster, the river sand or yellow sand, the lithium chinastone and other raw materials are used for forming a basic framework and performance of a ceramic tile green body, and the suspending aid, the bentonite and the sodium silicate are used for improving the dispersity, the cohesiveness and the fluidity of the raw materials; the material of the anti-skid layer has good wear resistance, hardness and anti-skid performance; the anti-slip layer material can form a stable compound in the glaze layer, and the anti-slip performance and attractiveness of the ceramic tile can be enhanced.

The invention belongs to the technical field of building materials, and provides a baking-free brick and a production process thereof, the baking-free brick comprises the following raw materials: 58-62% of industrial waste residue, 2.5-3.5% of stone nitrate, 8-10% of cement, 2.8-3.5% of quick lime, 0.15-0.25% of ash powder, 0.18-0.22% of JFS activator, and the balance of water; industrial solid waste resources are effectively utilized, energy consumption and production cost are reduced, exciting agent ions are promoted to diffuse to stone powder lattice defect sites through the steam heat effect, a nano water film enhances solid-liquid interface ion exchange, the material reaction activity index is remarkably increased, high-temperature sintering is not needed, and the requirement for green building material development is met; the environmental pollution is reduced.

The invention relates to the technical field of building materials, in particular to a coal gasification slag enhanced alkali-activated environment-friendly ceramic tile adhesive and a preparation method thereof. The invention provides a coal gasification slag enhanced alkali-activated environment-friendly ceramic tile adhesive, which is prepared from the following components in parts by mass: 30 to 50 parts of active silicate powder, 5 to 10 parts of an enhancer, 0.1 to 0.3 part of a water reducing agent, 0.03 to 0.05 part of a smoothing agent, 5 to 10 parts of stone powder, 0.09 to 0.15 part of cellulose, 3 to 5 parts of rubber powder, 60 to 100 parts of fine aggregate and 10 to 20 parts of an exciting agent, wherein the reinforcing agent is modified coal gasification slag powder. According to the environment-friendly ceramic tile adhesive, cement is replaced by the alkali-activated material, the raw materials are green and environment-friendly, and the environment-friendly ceramic tile adhesive has the advantages of quick setting and hardening and high early strength, is smooth and labor-saving in construction, and has excellent bonding strength in different scenes.

The invention relates to the technical field of sintered ore production, in particular to a sintering mixture and a preparation method thereof.According to the method, a large proportion of iron-containing dust sludge is adopted as a raw material to prepare the sintering mixture, and the sintering mixture comprises mixed iron-containing dust sludge, iron ore concentrate, fine ore, coke powder, magnesite powder and slaked lime powder; the mixed type iron-containing dust mud comprises blast furnace gas mud, converter mud and sintering machine tail dedusting ash, and the weight percentage content of the blast furnace gas mud, the converter mud and the sintering machine tail dedusting ash is 20%-25%: 8%-15%: 65%-70%. The method has the beneficial effects that the problems that the sintering mixture is poor in strength and unreasonable in particle size composition due to the fact that the iron-containing dust mud is directly used as the raw material for preparing the sintering mixture, and the yield and quality of sintered ore are deteriorated are solved.

The utility model discloses an intelligent control double-transmission double-roller flour mill, which relates to the technical field of flour milling equipment and comprises a loading device, a feeding device, a flour milling device, a console and an intelligent control device, the intelligent control device comprises a centralized control assembly, a feeding control assembly, a feeding control assembly, a pulverizing control assembly and a local touch screen, and the feeding control assembly, the feeding control assembly and the pulverizing control assembly are arranged in the feeding device, the feeding device and the pulverizing device correspondingly. The centralized control assembly and the local touch screen are arranged in the console; the centralized control assembly is in two-way connection with the feeding control assembly, the feeding control assembly, the pulverizing control assembly and the local touch screen through communication buses. The device has the characteristics of capability of automatically controlling operation, improvement of production efficiency and product quality, reduction of manual labor intensity, higher safety and the like, and is suitable for preparing stone powder, quartz powder, ceramic powder and the like.

The invention belongs to the field of preparation of road base materials, and relates to a method for preparing a road base material from a ternary solid waste cementing material and waste stone powder, which comprises the following steps: mixing fly ash, slag and carbide slag according to a mass ratio of (1-2): (4-5): (4-5) to form an FKD cementing material; uniformly mixing the dried waste stone powder with an FKD cementing material and water according to a water-cement ratio of 1.0; wherein the doping ratio of the FKD cementing material is 5%-30%; the uniformly stirred mixture is divided into three layers to be filled into a test mold, each layer is tamped, and the surface layer is subjected to chiseling treatment after each time of tamping; and putting the sample into a standard curing box, curing for 24 hours, demolding, and continuously curing to a set age. The strength of the prepared road base material is higher than that of a cement road base material of the same age, the utilization rate of the waste stone powder and the industrial waste residues is increased, the cost is reduced, and the road base material is environmentally friendly and conforms to the green development concept.

The utility model discloses an anti-blocking drum screen, which relates to the technical field of material screening equipment and comprises a drum screen, a frame 13, a drum screen power component, a drum screen feed end bearing component, a drum screen discharge end bearing component, a dustproof sealing cover 9, a feed hopper 10 and a discharge component. The cleaning and blockage blowing device comprises more than one high-pressure fan 16, a high-pressure air pipe 15, a mounting plate 17, more than two mounting suites and more than two rotary spray head brushes 7; the mounting kit comprises a mounting screw rod 18 and a high-pressure air pipe sleeve 19; the screen has the characteristics of cleaning the screen surface, preventing the screen from being blocked, prolonging the service life of the screen, reducing the use cost and the like, and is suitable for grading stones in a stone yard, separating soil from stone powder, separating sand and stones in a sand yard, separating lump coal from pulverized coal in the coal industry, grading materials in the chemical industry and the mineral separation industry and separating powdery materials.

The invention belongs to the technical field of ceramics, and particularly relates to a light glazed ceramic large brick and a preparation method thereof. The light glazed ceramic large brick is composed of a blank body layer, a ground coat layer and a surface glazed layer, wherein the blank body layer is prepared from the following components in parts by weight: 35-42 parts of kaolin, 25-30 parts of argil, 8-12 parts of cordierite, 10-15 parts of quartz, 5-9 parts of aluminum oxide, 4-9 parts of potassium feldspar and 1-3 parts of a binder; the ground glaze layer is prepared from the following components in parts by weight: 25-37 parts of potassium feldspar, 15-20 parts of calcined talc, 15-20 parts of frit, 10-25 parts of quartz, 8-10 parts of calcite, 5-10 parts of zirconium silicate and 5-8 parts of calcined zinc oxide; and the surface polishing glaze is prepared from the following components in parts by weight: 30-40 parts of frit, 20-30 parts of clay, 15-22 parts of albite, 10-15 parts of zinc oxide, 10-15 parts of stone powder and 8-13 parts of kaolin. Meanwhile, according to the preparation method of the large ceramic brick, a low-temperature fast firing technology is adopted, the sintering performance of the large ceramic brick is improved, the strength and hardness of the large ceramic brick are improved, and the large ceramic brick is safe, firm and not prone to breakage when bearing certain pressure or impact force.

The invention discloses a technical method of a lean magnetite dry-discarded tailing recleaning recovery process, and relates to the technical field of iron ore recovery. The technical method of the lean magnetite dry-discarded tailing recleaning and recycling process is characterized by comprising the following specific operations: S1, stacking coarse tailings at one place; s2, adding the coarse tailings obtained in the step S1 into a vertical shaft crusher; s3, the materials obtained in the step S2 are added into a double-layer efficient fine powder sieve, then the materials with the particle size being 0-6 mm serve as stone powder to be subjected to the step S4, the materials with the particle size being 6-16 mm serve as melon seed slices to be subjected to the step S5, the materials with the particle size being larger than 30 mm serve as medium four stones to be subjected to the step S6, and if other materials exist, the materials with the particle size being larger than 30 mm serve as medium four stones to be subjected to the step S6. According to the lean magnetite dry-discarded tailing recleaning and recycling process technical method, existing coarse tailing (0-30 mm) building material products are subdivided, and the standard of mainstream building material products in the market is met; and fine-fraction (0-6 mm) fine ore resources in the coarse tailings are subjected to re-separation and recovery, so that the metal loss is reduced, and the metal recovery rate is increased.

The invention relates to the technical field of roadbeds, and discloses a semi-filled and semi-excavated roadbed for flow-state solidified soil pouring construction in a mountainous area, the semi-filled and semi-excavated roadbed comprises an excavation area and a filling area which are formed by excavating a side slope soil body, and an inner side roadbed is formed at the bottom of the excavation area; the filling area is provided with a plurality of steps which are arranged in an upward opening mode, and a continuously-arranged pouring interface is formed. The filling area is filled with a filling soil layer, an outer side roadbed is formed at the top, and the outer side roadbed and the inner side roadbed are flush and butted to form a roadbed; the filling soil layer is formed by pouring and solidifying flow-state solidified soil, the flow-state solidified soil is formed by stirring and mixing an excavated soil body, a curing agent and a water body, and the curing agent comprises superfine slag powder, coal ash, waste gypsum, water glass, stone powder slag and furnace slag; the slope soil body contains clay minerals, the flow-state solidified soil and the clay minerals are subjected to chemical reaction, so that the pouring interface and the filling soil layer are combined into a whole, the problem that the interface combination between the filling area and the excavation area is not tight is effectively solved, and therefore the overall stability of the roadbed is enhanced.

The invention discloses a microwave-assisted energy-saving method for preparing vaterite by micro-bubble mineralization regeneration of waste stone powder, and belongs to the field of high-added-value resource utilization of solid wastes. The method comprises the following steps: mixing waste stone powder and iron-rich sludge, preheating, carrying out microwave-assisted heating, activating the waste stone powder, and pyrolyzing the iron-rich sludge into an iron-carbon material to obtain a mixed material; mixing the mixed material with a leaching agent for digestion, separating out the iron-carbon material in the digestion process, and adjusting the pH value to remove impurities; and injecting flue gas generated by heating into the digested solution in a micro-nano bubble form, stirring, adding a crystal form regulator, and reacting to obtain vaterite. According to the method, the waste stone powder and the iron-rich sludge are co-treated in a microwave-assisted pyrolysis manner, the treatment scale is large, the iron-rich sludge is carbonized, the surface iron minerals are modified, a high-energy wave-absorbing point is formed, the energy consumption is low, the obtained micro-nano vaterite and the iron-carbon material have great additional values, the product performance is good, and zero carbon emission is realized in the whole process.

The invention belongs to the technical field of high-entropy materials, and discloses high-entropy pyrochlore ceramic as well as a preparation method and application thereof. The chemical formula of the high-entropy pyrochlore ceramic is (La0. 2Nd0. 2Sm0. 2Gd0. 2Er0. 2) 2M2O7, M is Zr, Hf, Ti or Sn, lanthanum oxide, neodymium oxide, samarium oxide, gadolinium oxide, erbium oxide and zirconium oxide or hafnium oxide or titanium oxide or tin oxide are sintered at the temperature of 1400-1600 DEG C to synthesize high-entropy pyrochlore powder, the high-entropy pyrochlore powder is mixed with tin chloride, ball-milled and dried to obtain mixed powder, the mixed powder is mixed with a surfactant, the mixed powder is mixed at the temperature of 200-400 DEG C, ball-milled and dried, and the high-entropy pyrochlore ceramic is obtained. And carrying out cold sintering under the pressure of 200-500MPa, and then carrying out vacuum sintering at the temperature of 1300-1600 DEG C, thereby obtaining the The high-entropy pyrochlore ceramic disclosed by the invention is high in purity, high in density, excellent in mechanical property and leaching resistance, low in sintering temperature and short in heat preservation time, and has an application prospect in the field of nuclear waste curing.

The invention relates to a concrete mix proportion design method based on machine-made sandstone powder, and relates to the technical field of concrete preparation, and the method comprises the following steps: according to a selected cementing material and the content of stone powder screened from machine-made sand, calculating to obtain a stone powder excess value; acquiring a mix proportion parameter of the reference concrete and the strength of the reference concrete; the excess stone powder in the machine-made sand is used as an inert mineral admixture, and the amount of cement replaced by the stone powder is calculated according to the substitution coefficient gamma c and the excess value of the stone powder; and testing the water demand ratio of the stone powder, and calculating to obtain the final water consumption of the concrete. The resource comprehensive utilization rate of the high-stone-powder-content dry-process machine-made sand can be increased, and the cement consumption is reduced.