37 results about "Stone dust" patented technology

The application discloses a concrete production method, comprising the following steps: step 1, determining the quantity of materials needed to be added to ordinary concrete according to the required compressive strength of the roller compacted concrete; step 2, sequentially adding the required materials into the ordinary concrete and performing roller compacting mixing in the concrete; step 3, adding an admixture into the concrete obtained in step 2 through a low-temperature high-pressure spraying mixing mode; and step 4, adding asphalt into the concrete obtained in step 3 and uniformly mixing to obtain the roller compacted concrete. Further, the materials comprise stone powder, fly ash and pozzolanic admixture. The application increases the hardness and compressive strength of the ordinary concrete through material adding and process treatment, so that the roller compacted concrete can be produced on site when the demand is small, and factory ordering is not needed, thereby saving the construction cost.

The application discloses a kind of weathered marble waste stone powder resource utilization composition and application thereof, belong to environmental protection technical field.The weathered marble waste stone powder resource utilization composition includes marble waste stone powder, soil and microalgae biological fertilizer SynMiCom.The application mixes soil in marble waste stone powder and then adds SynMiCom, which can significantly reduce the pH of marble waste stone powder, significantly increase the content of reduced nitrogen in marble waste stone powder, significantly increase the content of available phosphorus in marble waste stone powder, significantly increase the enzyme activity in marble waste stone powder, and significantly promote the growth of peppers in marble waste stone powder.The application utilizes the long-term weathered marble waste stone powder, which has low cost and high application value.

The present disclosure relates to the technical field of dry magnetic separators, and one embodiment of the present disclosure provides a mine dry magnetic separator, which comprises a shell, an inner top wall of the shell is provided with a feeding port, and inner bottom walls of the shell are respectively provided with a first discharging port and a second discharging port; the mine dry magnetic separator further comprises a roller, a magnetic system, a driving disc, a first motor and a cleaning mechanism; limit grooves are formed in opposite side walls of the shell; the roller is rotatably arranged between groove bottoms of the two limit grooves; the magnetic system is fixedly arranged on the groove bottom of one of the limit grooves; the magnetic system is arranged in an arc shape and is in contact with an inner wall of the roller; the driving disc is fixedly arranged at one end of the roller; the first motor is mounted on the side wall of the shell; an output end of the first motor is fixedly connected with the roller; and the cleaning mechanism is arranged on the shell and is used for cleaning iron-containing stone powder attached to the surface of the roller. Through the above technical solution, the technical problem that iron-containing magnetic powder is easily attached to the surface of the roller and affects the magnetic separation effect in the prior art is solved.

This invention discloses a high-crack-resistant fully graded concrete and its preparation method, composed of nano-silica, granulated blast furnace slag powder, cement, fly ash, stone powder, sand, and gravel. By controlling the particle size distribution of each component, this invention ensures that the overall particle size distribution curve closely matches a pre-defined piecewise mathematical model (b=7), thereby achieving multi-scale filling from nanometer, micrometer, to centimeter levels to form fully graded concrete. At a water-cement ratio of 0.38, the concrete exhibits a 3-day compressive strength >30 MPa and a splitting tensile strength >3.8 MPa; a 28-day compressive strength >50 MPa and a splitting tensile strength >5.4 MPa; and the crack width in the 28-day circular restraint cracking test can be controlled within 0.5 mm. This concrete material possesses significant advantages such as low shrinkage deformation, outstanding crack resistance, and high early strength, making it suitable for concrete projects with high crack resistance requirements.

The present application relates to the technical field of ink curing coating, and discloses a preparation method of external wall stone-like thermal insulation coating, which is composed of the following components in mass fraction: 30-50 parts of acrylic emulsion, 8-20 parts of glass powder, 5-15 parts of ceramic powder, 15-30 parts of natural stone powder, 10-25 parts of sand, 0.3-1.2 parts of thickening agent, 0.5-1.5 parts of wetting dispersant, 1.5-3.5 parts of film-forming aid, 1-5 parts of mildew-resistant weathering agent and 50-80 parts of water. The external wall stone-like thermal insulation coating of the present application forms a micro heat insulation layer in the coating by adding components such as glass powder and ceramic powder, effectively reduces heat conduction, reduces the energy consumption of buildings, and achieves good thermal insulation effect. The mildew-resistant weathering agent used is a new compound, which can achieve long-term bacteriostasis by destroying the cell wall of mold or interfering with its metabolic enzyme system. It has high stability and is not easy to decompose in a humid environment, and can provide long-lasting mildew protection for buildings.

The application discloses a method for determining water-soluble calcium content in stone powder, and relates to the technical field of material detection. The method comprises the following steps: firstly, mixing a stone powder sample with water to extract a sample solution; then, adding an excess of sodium bicarbonate solution to part of the sample solution, heating at 70-80 DEG C, cooling and standing, and then treating the sample solution by filtration, washing and drying to obtain a precipitate; finally, calculating the water-soluble calcium content in the stone powder according to the mass of the precipitate. The method realizes accurate detection of the water-soluble calcium content through sodium bicarbonate precipitation and constant weight determination. The method can also realize batch detection of samples, improves work efficiency, and is safe and environmentally friendly in the experimental process.

This invention relates to the field of electrical porcelain production technology, specifically disclosing an electrical porcelain glaze for reducing the porosity of porcelain parts. The glaze comprises, by mass parts: 4-10 parts high-clay, 3-10 parts calcium silicate micropowder, 1-5 parts high-temperature calcined liquid stone powder, 25-35 parts potassium microparticles, 10-30 parts silica micropowder, 10-20 parts hard kaolin, 4-12 parts α-alumina micropowder, 6-10 parts glaze color base, and 0.15-0.25 parts CMC. A method for preparing the electrical porcelain glaze for reducing the porosity of porcelain parts includes: Step 1, formulation development and screening: designing a color glaze formulation and screening a formulation with an initial melting temperature ≥1170℃ as the target formulation; Step 2, pilot testing and production: adding the raw materials weighed according to the target formulation to a ball mill and ball milling to obtain a glaze slurry; testing the fineness of the glaze slurry, followed by a melting temperature test; after passing the test, firing the glaze slurry onto an electrical porcelain blank to obtain the electrical porcelain product. This solution aims to reduce the porosity within ceramic components, thereby addressing the issue of significant performance variation in high-voltage power transmission ceramic products.

Non-hydraulically reactive blended particulate compositions for use in making low carbon blended cement or low carbon concrete include a pozzolanic component having a first D90 and a mineral filler component having a second D90 greater than the first D90 dry blended without intergrinding, wherein the composition is free of hydraulic cement. The pozzolanic component can have a D90 less about 45 μm and the mineral filler can have a D90 greater than about 45 μm. The pozzolanic material can be fly ash, bottom ash, metallurgical slag, silica fume, metakaolin, volcanic ash, natural pozzolan, calcined shale, calcined clay, and / or ground glass. The mineral filler component can be aggregate fines, quarry fines, limestone powder, granite fines, stone dust, rock dust, marble dust, mine tailings, pulverized bottom ash, pulverized metallurgical slag, ground recycled concrete, pulverized shale from shale oil extraction, or pulverized sand from tar sand extraction.

A kind of superfine sand production processing equipment, including feed conveying device, crushing screening device, storage device and dust removal device, feed conveying device is stored raw material to crushing screening device;Crushing screening device carries out crushing, screening treatment to the incoming raw material, including the crushing machine of the incoming raw material crushing, with the screening mechanism of crushing machine connection to the screening of crushed material, with the distribution valve of screening mechanism connection and with the return belt conveyor of feed conveying device connection, the screening mechanism is screened into superfine sand, screening sand material and over-limit material;Storage device includes first storage tank for storing superfine sand and second storage tank for storing fine sand connected with distribution valve;Dust removal device screening mechanism connection, for adsorbing stone powder;The processing equipment of the application, overall process is simple, easy to operate, can realize the maximum utilization of resources.

This invention provides a method for preparing silicon carbide using waste granite powder and conductive carbon black, comprising the following steps: S1, mixing waste granite powder and conductive carbon black evenly to form a mixture; S2, ball milling the mixture and sieving it to obtain a refined mixture; S3, placing the refined mixture into a Joule apparatus and sintering it to prepare a multiphase composite powder; S4, calcining the multiphase composite powder at high temperature and then alkali washing to obtain silicon carbide powder. This invention achieves high-value recycling of waste granite powder, solving the problems of high energy consumption and long cycle time in traditional silicon carbide preparation processes, and avoiding the problems of large land occupation and significant pollution from the accumulation of building material waste. This invention aligns with the concept of green and low-carbon development, turning waste into treasure. By designing different raw material ratios and sintering parameters, different types of silicon carbide products can be prepared, creating economic benefits while controlling pollution.

This invention provides a method for preparing a novel foam ceramic material based on granite and marble tailings, comprising the following steps: S1, mixing granite powder, marble powder, waste glass powder, and additives uniformly to form a mixture; S2, ball milling the mixture to obtain a refined mixture; S3, drying and shaping the refined mixture to obtain a foam ceramic green body; S4, sintering the foam ceramic green body to obtain the novel foam ceramic material based on granite and marble tailings. This invention uses waste as the main component, transforming accumulated waste into economically beneficial products, achieving green and low-carbon industrial development, and possessing advantages such as high ecological value and good economic benefits. The lightweight foam ceramic obtained by this invention has excellent compressive strength and achieves large-scale disposal of solid waste, overcoming the problems existing in the prior art.

This invention provides a modified slag aggregate powder for preparing concrete and its preparation process. The preparation process of the modified slag aggregate powder for concrete includes the following steps: preliminary ball milling of the slag aggregate powder, dilution with hydrochloric acid and acid leaching activation, dilution of an aluminate coupling agent and primary surface modification, secondary surface modification, addition of calcium sulfate whiskers, centrifugal spray drying, and collection of the modified slag aggregate powder. This invention utilizes an aluminate coupling agent and a silane coupling agent to composite modify the slag aggregate powder, thereby effectively improving the bonding strength of the slag aggregate powder. Concrete prepared using this composite-modified slag aggregate powder as one of the raw materials exhibits good cohesiveness and strong impact resistance after drying.

The application discloses a firing forming method of end inkstone stone powder, and belongs to the technical field of waste resource utilization and ceramic product manufacturing. The method aims to solve the problem of direct discarding of a large amount of stone powder waste generated in the process of end inkstone carving, resource waste and environmental pollution. The technical scheme of the application is as follows: the end inkstone stone powder waste is collected, powdered, and sieved for raw material pretreatment; the obtained powder is mixed with water, and the mixture is left to stand and dehydrated to obtain plastic mud; then the mud is formed and dried, and then sintered under a specific temperature curve, and finally a ceramic product with a compact structure is obtained. Through the above-mentioned pure physical preparation and sintering process, the application realizes efficient recovery and high-value utilization of the end inkstone stone powder, the obtained product has excellent performance, has the characteristics of not leaking water, can be used as a living utensil or a decorative product, and meets the green manufacturing concept. The process flow chart of the application is shown in FIG. 2.

This invention relates to the field of waterproof coating technology, and discloses a modified bitumen-based weather-resistant waterproof coating and its production process. This waterproof coating is composed of water, bactericide, diluent, emulsifier, petroleum asphalt, stone powder, aromatics, defoamer, thickener, and film-forming aid. The production process involves sequentially adding and mixing various raw materials in a mixing device. First, a portion of the raw materials is stirred until completely dissolved. Then, the speed of the disperser is adjusted in stages according to different processes, and each subsequently added raw material is continuously stirred. Finally, the film-forming aid is added and stirred until the material is homogeneous before discharging, thus obtaining the modified bitumen-based weather-resistant waterproof coating. The product of this invention can be single-component or applied cold, is simple to operate, and forms a seamless and elastic film after formation. It also possesses good flexibility, crack resistance, adhesion, acid and alkali resistance, and aging resistance. It is suitable for waterproofing needs in various building scenarios, with good waterproofing and seepage prevention effects and a long service life.

This invention discloses a fully automated finished stone material preparation system and its production process, belonging to the field of building material preparation technology. The system adopts a factory-style assembly line layout, sequentially including: a raw material crushing and shaping unit, a sand making and grading unit, a finished product sorting and storage unit, a dust collection and stone powder recovery unit, a material circulation and buffer unit, a resource-based packaging unit, and a central intelligent control unit. The finished product sorting and storage unit is equipped with parallel and independently conveying No. 1 and No. 2 finished product belts, a gravel finished product belt, and a dry sand finished product belt; the dust collection unit includes a dust collector network, a stone powder silo, and a dust hopper; the resource-based packaging unit directly or in combination with other materials forms bagged products from stone powder. This invention integrates aggregate shaping, dry sand making, full stone powder recovery, and compounding and packaging processes, achieving material balance and adaptive quality adjustment through intelligent control. It produces no process wastewater, achieves 100% stone powder utilization, and maintains a dust emission concentration ≤8mg / m³, realizing green, efficient, and intelligent production.

The utility model discloses a kind of stone powder drying devices for real stone paint, including mounting mechanism, and mounting mechanism includes mounting seat, and the top middle part of mounting seat is equipped with mounting ring stand;Drying mechanism, drying mechanism includes rotating motor, stirring motor and heating jacket, rotating motor is threadedly connected in the bottom middle part of the inner wall of mounting seat, and the output end of rotating motor extends into mounting ring stand, and is fixedly connected with rotating cylinder, heating jacket is sleeved on the outer surface of mounting ring stand, and the output end of stirring motor is fixedly connected with hollow column, and the opposite sides of hollow column outer surface are clamped and connected with support, and the outside of support equidistantly is connected with heating stirring rod and is penetrated;It further includes movable mechanism, and movable mechanism includes movable frame, and the side of movable frame is penetrated and connected with movable motor, and the output end of movable motor is equipped with movable block.The utility model is suitable for drying treatment of different amount of stone powder, and has strong applicability, meets different needs, and improves use effect.

The application provides a cement raw material prepared from stone slag and stone powder and a method for preparing cement clinker by using the same. The cement raw material is composed of the following raw materials in percentage by weight: limestone 70-80%, stone slag and stone powder 10-15%, iron ore dressing powder 8-11%, and coal-fired furnace slag 2-4%. The method for preparing cement clinker comprises the following steps: mixing the raw materials in proportion, grinding the mixture to obtain the cement raw material, and storing the raw material in a homogenizing warehouse; feeding the raw material powder into a preheater by a conveying device for pre-decomposition to obtain semi-clinker; and feeding the semi-clinker into a rotary kiln, performing high-temperature calcination in the rotary kiln, and then feeding the semi-clinker into a grate cooler for rapid cooling to obtain the cement clinker. The application uses dolomite stone slag and stone powder as the cement raw material, which can reduce the cost of cement production, ensure the quality of the clinker, and is beneficial to the comprehensive utilization of mineral resources and the extension of the service life of the mine.

This invention discloses a method for designing the composition of a limestone powder-containing TSA-resistant cementitious material for tunnel concrete, comprising the following steps: Step 1, determining the TSA erosion environment level of the tunnel structure concrete; Step 2, determining the mass dosage W of highly active cementitious material per cubic meter of concrete. CM Step 3: Determine the mass percentage R of tricalcium aluminate in the highly active cementitious material. C3A Step 4: Determine the type and composition of the high-activity cementitious material; Step 5: Determine the mass quantity (W) of stone powder used as a low-activity cementitious material per cubic meter of concrete. LS Step 6: Determine the composition and mass percentage of cementitious materials in a single cubic meter of concrete. Since all materials involved in this method are mature and widely used, they are readily available, their quality is controllable, and their indicators are easy to obtain. Furthermore, this method can provide corresponding material composition designs for different low-temperature sulfate attack environments, making it highly targeted, covering most low-temperature sulfate environments, and has broad prospects for widespread application.

The utility model discloses a road surface leveling device for road surface construction, including machine body and install handle of machine body both sides, machine body front end detachably connected with leveling assembly, leveling assembly includes powder inlet hopper, powder storage block, extension spring, first support block, mounting block, bolt and powder outlet pipe, powder storage block upper end is equipped with powder inlet hopper, and lower end is equipped with powder outlet pipe, first support block one end is fixed link with powder storage block, and the other end is fixed link with extension spring one end, extension spring other end is fixed link with mounting block, powder storage block is close to the bolt of adjusting stone powder flow of powder outlet pipe place, the utility model discloses the advantage lies in: road surface leveling device for road surface construction makes the staff see the line bending of stone powder and can know the unevenness of this outlet in time through setting leveling assembly, saves time and labour, through setting filter component, increases the service life of dust catcher itself, through setting surveying assembly, can know whether the road surface is even in time.

This invention relates to the field of building materials technology, specifically to a self-leveling mortar based on recycled solid waste materials and its preparation method. The mortar comprises the following raw materials by weight: 100 parts additives, 120-150 parts aggregates, 0.3-0.8 parts auxiliaries, 0.05-0.15 parts cellulose ethers, 0.1-0.3 parts defoamer, and 25-35 parts water. The additives consist of granulated blast furnace slag powder, fly ash microspheres, and additive powder. The aggregates are a mixture of waste glass sand and waste stone powder. This invention solves the problems of complex processes, strong corrosiveness, and inability to dry-produce traditional alkali-activated mortars through dry-powder geopolymer activation technology. The prepared mortar has high fluidity, an ultra-long construction window, high early strength, and excellent durability. This invention achieves high-value-added resource utilization of various solid wastes, with a high solid waste content in the product, significantly reducing production costs and environmental burden, and exhibiting significant economic and environmental benefits.

The application provides a kind of iron tailings sand-containing machine-made sand concrete and a preparation method thereof, relates to the technical field of building materials and solid waste resource utilization, and includes obtaining iron tailings sand and machine-made sand, respectively detecting the fineness modulus, 0.075mm below particle content, water absorption and moisture content of the iron tailings sand, and the fineness modulus, stone powder content, water absorption and moisture content of the machine-made sand.The iron tailings sand-containing machine-made sand concrete and the preparation method thereof detect the performance state of the iron tailings sand and the machine-made sand, and combine saturated surface dry conversion, mixing water correction, pre-wetting correction, compound control and segmented mixing, etc.Processing flow, effectively regulate the preparation process of composite fine aggregate, thereby improving the mix proportion adaptability and preparation stability of the iron tailings sand-containing machine-made sand concrete, and reducing the workability fluctuation and performance instability caused by the difference in particle composition and water absorption characteristics of the two types of fine aggregate.

The present invention relates to the technical field of floorings, and discloses a plastic flooring substrate prepared from recycled PET. The substrate is prepared by mixing a recycled PET material, a stone powder, a chain extender, stearic acid, an oil body and an elastomer. In terms of mass percentage, the recycled PET material accounts for 15% to 25%; the stone powder accounts for 65% to 78%; the chain extender accounts for 0.4% to 1%; the stearic acid accounts for 0.5% to 2%; the oil body accounts for 1% to 3%; and the elastomer accounts for 1% to 5%. The recycled PET is used as a binder to bind the stone powder, and the mixture is extruded by means of an extruder to form a substrate for plastic floorings; products having GRS and SCS certifications can be readily obtained, and a PET product, unlike conventional PVC plastic flooring substrates, does not decompose upon exposure to light to release irritating chlorine gas or hydrogen chloride; furthermore, since recycled PET is widely available, the products have a broader market.

This invention relates to the field of electrical porcelain production technology, specifically disclosing an opaque glaze for electrical porcelain, comprising 5-15 parts of high-clay, 3-10 parts of calcium silicate micropowder, 5-18 parts of high-temperature calcined liquid stone powder, 10-20 parts of potassium microcline, 10-20 parts of high-sodium Linxiang feldspar, 15-25 parts of silica micropowder, 5-14 parts of hard kaolin, 4-12 parts of zircon sand micropowder, 2-6 parts of α-alumina micropowder, and 0.15-0.25 parts of CMC. The preparation method of the opaque glaze for porcelain includes the following steps: Step 1: Designing the opaque glaze formula, conducting small-scale and comparative tests, and selecting a formula with an initial melting temperature ≥1170℃ as the target formula; Step 2: Weighing each raw material according to the target formula and adding it to a ball mill, ball milling to obtain a glaze slurry, performing a fineness test, and after the fineness is qualified, performing an initial melting temperature test, and after the test is qualified, applying the glaze, and then firing to obtain the electrical porcelain product. This solution addresses the problem that fine grinding alone cannot reduce internal porosity and results in significant performance dispersion for high-voltage power transmission electrical porcelain products.

This invention discloses a mix design method for wet-mix shotcrete based on the control of the slurry film thickness. It relates to the field of wet-mix shotcrete technology for underground hydraulic caverns and includes the following steps: S1, selecting or preparing stone powder, micro-stone powder with a particle size of less than 0.08 mm, and artificial sand; S2, selecting low-density submicron silica; S3, incorporating the micro-stone powder with a particle size of less than 0.08 mm, the low-density submicron silica, and cement into the slurry film layer, and determining the target values ​​tp,targ for the slurry film thickness covering the aggregate surface. This invention solves the quantitative design problem of suitable slurry volume for wet-mix shotcrete that matches aggregate particle size, gradation, and dosage; and "slurry film thickness" replaces "slump" as a quantitative characterization of the effective volume of the slurry, further quantifying the impact of aggregate particle size, gradation, and dosage on the effective volume of the slurry. The slurry film thickness can better characterize the pumping and spraying performance of concrete.

This invention discloses a green and environmentally friendly highly flexible exterior wall putty and its preparation method, relating to the field of building materials technology. It comprises the following components: Component A and Component B. Component A includes cement, composite modified stone powder, and cellulose ether; Component B includes elastic acrylic emulsion, water-based epoxy resin emulsion, film-forming aid, defoamer, mildew inhibitor, and water. The preparation method of the composite modified stone powder includes activating and pretreating the stone powder, then grafting a silane coupling agent onto the surface of the pretreated stone powder to obtain silane coupling agent modified stone powder; and grafting cellulose onto the surface of the silane coupling agent modified stone powder to obtain composite modified stone powder. The putty obtained by this invention uses composite modified stone powder as a filler, is energy-saving and environmentally friendly, and possesses excellent flexibility, crack resistance, water resistance, and weather resistance, effectively adapting to the deformation of the external wall insulation system.

This utility model discloses a stone fragment recycling mechanism, including a mounting bracket. The top of the mounting bracket is connected to a fixed flange via a telescopic flexible hose. Symmetrical bottom brackets are mounted on both sides of the mounting bracket, and a moving mechanism is installed between the two bottom brackets. A first collection component for collecting residual stone fragments is installed on the inner bottom wall of the mounting bracket. It also includes two collection and storage shells, the bottoms of which are respectively connected to the moving ends on both sides of the moving mechanism. A second collection component for collecting stone fragments is detachably connected inside each collection and storage shell. This utility model uses the moving mechanism to drive the two second storage boxes to reciprocate alternately. When one second storage box reaches a set capacity, it automatically switches to the other, preventing the stone crushing device connected to the recycling mechanism from stopping and improving efficiency.

The application provides a stone powder storage device for stone paper production, and relates to the technical field of stone powder storage. The device comprises a support structure, a storage box is arranged on the support structure, a vibration motor is arranged at the bottom of the storage box, and the vibration motor is used to provide vibration force to the stone powder in the storage box through the storage box to separate the stone powder from the inner wall of the storage box when the stone powder is discharged. The vibration motor is installed at the bottom of the storage box, and the vibration motor is used to vibrate the storage box by using the vibration force generated by the vibration motor. The vibration function can destroy the adhesion between the stone powder and the inner wall of the storage box, so that the stone powder originally adhered to the inner wall is shaken off, and the residual amount of the stone powder on the inner wall of the storage box is significantly reduced. The vibration function promotes the smooth discharge of the stone powder during the discharging process.