1542 results about "Fine powder" patented technology

The invention provides an anti-corrosion ceramic sagger and a preparation method thereof.The anti-corrosion ceramic sagger comprises an aggregate layer and a matrix layer, and the aggregate layer is prepared from, by mass, 30-50 parts of yttrium-stabilized zirconia, 20-30 parts of silicon carbide and 15-25 parts of magnesium aluminate spinel; the matrix layer is prepared from the following raw materials in parts by mass: 40 to 50 parts of mullite micro powder, 30 to 40 parts of cordierite micro powder and 10 to 20 parts of binding agent. According to the anti-corrosion ceramic sagger and the preparation method thereof, by optimizing the raw material ratio and the preparation process, the corrosion depth is smaller than or equal to 0.19 mm after the sagger is soaked in the molten salt environment at 900 DEG C for 72 h, the service life is prolonged by 6-8 times compared with that of a traditional corundum sagger, and the anti-corrosion ceramic sagger has wide application prospects.

The invention provides a composite solid waste-based cementing material and application thereof, the composite solid waste-based cementing material comprises 93-97 parts of industrial solid waste micro powder, 3-7 parts of an inorganic additive and 2-5 parts of an organic additive, and the invention further provides a preparation method of the composite solid waste-based cementing material. According to the solid waste-based cementing material provided by the invention, the hydration potential of all components in the solid waste-based cementing material is accelerated through the organic-inorganic composite admixture, the mechanical property and toughness of the solid waste-based cementing material are synergistically enhanced, the phenomena of falling off and falling off after molding are reduced, and the solid waste-based cementing material has important significance on the development of the solid waste recycling industry.

The invention discloses a method for preparing spherical metal fine powder by using coarse / waste powder through ultrasonic atomization, which comprises the following steps of: (1) collecting coarse / waste powder raw materials for ultrasonic atomization powder preparation, (2) conveying the coarse / waste powder to an electric arc melting area through argon gas flow, and carrying out melting and ultrasonic atomization powder preparation processing; (3) in the powder preparation process, the powder is continuously collected by using argon circulating airflow, so that the continuity of the powder preparation process is ensured; and (4) finally screening the prepared powder in particle size ranges to obtain high-quality spherical fine powder in different particle size ranges. According to the method, the recycling and reusing problems of 3D printing splashing waste powder and coarse powder in the traditional gas atomization powder manufacturing process are solved, and the powder pollution risk is remarkably reduced; according to the ultrasonic atomization re-powdering technology, the high-quality spherical metal fine powder needed by additive manufacturing can be efficiently prepared, powder waste discharge and environmental burden are reduced, the obtained powder can be directly used as a high-quality raw material for additive manufacturing, and green and sustainable development of the metal additive manufacturing industry is promoted.

To provide a powder coating device that removes only fine powders that are difficult to attach to a coated object from a recovery powder circulation path, suppresses a ratio of fine powders contained in recovery powders, and has high adhesion efficiency.SOLUTION: A powder coating device performs coating by blowing a powdered paint A conveyed by conveyance air from a coating material tank 1 to a coated object W in a powder coating booth 6, and comprises a circulation path that recovers overspray powders which have not attached to the coated object W and returns the recovered recovery powders to the coating material tank 1. In the powder coating device, a fine powder removal device for removing fine powders which are difficult to adhere to the coated object is installed in the recovery powder circulation path.SELECTED DRAWING: Figure 1

The invention relates to a high-purity corundum brick with high thermal shock resistance and a preparation method thereof, and belongs to the technical field of refractory materials. The high-purity corundum brick with high thermal shock resistance is prepared from the following raw materials in parts by mass: 55 to 65 parts of tabular corundum particles, 20 to 25 parts of tabular corundum fine powder, 8 to 12 parts of modified fused zirconia corundum particles, 5 to 8 parts of nano aluminum oxide powder, 2 to 3 parts of rho-aluminum oxide powder, 0.3 to 1 part of toughening agent and 0.3 to 1.5 parts of binding agent. The toughening agent increases the fracture toughness of the high-thermal-shock-resistance high-purity corundum brick through a plurality of strengthening mechanisms such as crack deflection, crack branching and microcracks, so that the high-thermal-shock-resistance high-purity corundum brick has high thermal shock resistance and mechanical properties. Meanwhile, the fused zirconia corundum has a short fiber structure through modification, and fibers can hinder linear propagation of main cracks, force the cracks to deflect and form crack branches, so that the thermal shock resistance and mechanical properties of the high-purity corundum brick with high thermal shock resistance are further enhanced.

The invention discloses an Ag2Se-based thermoelectric material and a preparation method thereof, and belongs to the technical field of thermoelectric materials. The preparation method comprises the steps that Ag powder and Se powder are mixed and ground according to the molar ratio of (1.9-2.1): 1, and mixed powder is obtained; the mixed powder is subjected to cold pressing to form blocks, and prefabricated blocks are obtained; the prefabricated block is subjected to heat preservation for 20-120 minutes under the conditions that the pressure is 1-5 GPa and the temperature is 400-1000 DEG C, and an Ag2Se initial product is generated through reaction; crushing the primary product, and grinding into fine powder; and sintering the fine powder for 5-30 minutes under the conditions that the pressure is 1-5 GPa and the temperature is 300-900 DEG C, so as to obtain the composite material. The sample is prepared through high temperature and high pressure for the first time, the method is simple, operation is easy to control, the preparation period can be greatly shortened, and the energy utilization rate is increased; the electroacoustic transport performance of Ag2Se is effectively regulated and controlled by changing the pressure and the temperature, and finally the thermoelectric performance is effectively improved.

The invention provides a porous ceramsite adsorption material prepared from straw biochar and rare earth tailings as well as a preparation method and application of the porous ceramsite adsorption material, and belongs to the technical field of environmental functional adsorption materials. The preparation method of the porous ceramsite adsorption material using the straw biochar and the rare earth tailings comprises the following steps: sequentially performing acid pickling and drying on the straw biochar to obtain acidified biomass charcoal; the rare earth tailings are subjected to ball milling, and tailings fine powder is obtained; mixing the acidified biomass charcoal, the tailing fine powder, the attapulgite and the wood chips to obtain a mixture; adding a binding agent and water into the mixture, and sequentially performing kneading and extrusion molding to obtain a ceramsite precursor; and calcining the ceramsite precursor in a protective atmosphere to obtain the porous ceramsite adsorption material. The technical problems that a traditional adsorption material is low in adsorption capacity, poor in strength and difficult to recycle are solved through ternary compounding of the acidified biomass charcoal, the rare earth tailings and the attapulgite and in combination with wood chip pore-forming, segmented calcination and acid pickling pretreatment.

The invention provides a hot-state repairing material and a preparation method thereof, and belongs to the technical field of refractory materials. The hot-state repairing material provided by the invention is prepared from the following raw materials in percentage by mass: 87 to 98 percent of waste bricks, 0.5 to 4.5 percent of magnesium mineral micro powder, 0.5 to 5.0 percent of slag powder, 0.5 to 2.0 percent of dispersing agent, 0.2 to 1.5 percent of organic fiber and 0.1 to 0.5 percent of binding agent. According to the invention, waste bricks are used as aggregates, contain tiny pores, provide channels for reaction gas for heating the hot-state repairing material, and can be rapidly sintered with a furnace lining; the slag powder can be matched with the binder to improve the thermal adhesion rate of the thermal repairing material; the magnesium mineral micro powder can improve the reaction activity, and the dispersing agent assists the combination effect of the slag powder, so that the repairing material can be sintered through rapid reaction, and the compression strength and the erosion resistance are improved; and the organic fibers can form good filling among particles and fine powder, so that the compression strength and the erosion resistance are improved.

The invention relates to the technical field of building construction, in particular to a cement material stirring device for building decoration engineering construction, a screening mechanism in the cement material stirring device drives an inclined box and an internal inclined screen to continuously move up and down in a reciprocating manner through a transmission assembly, and dynamic screening of input cement is achieved; qualified powder rapidly penetrates through the screen and enters a subsequent process through the vertical pipe, intercepted agglomerates automatically roll down to a lower outlet under the action of vibration and inclination, the agglomerated cement materials are screened, meanwhile, the smashing mechanism ingeniously obtains power from a driving motor through a rotating shaft, and the smashing efficiency is improved. Crushing cutters distributed on a first rotating rod and a second rotating rod in a staggered mode in the box body are driven by a bevel gear and a gear set to rotate oppositely at a high speed, cakes falling from a lower outlet are thoroughly cut and scattered, the cakes are reduced into fine powder and then collected into a stirring barrel, and the efficiency and quality of raw material preparation before stirring are greatly improved; and the problem of non-uniform slurry caused by cement caking and core hardening is fundamentally avoided.

The invention relates to the technical field of powder selecting machines, and particularly discloses a composite powder selecting machine which comprises a first filtering bin, an airflow bin and a second filtering bin, a plurality of scraping plates are rotationally connected in the first filtering bin through a gear ring, a fixing ring is rotationally connected to the gear ring, a discharging opening is formed in the fixing ring, a first vertebral plate is fixedly connected in the first filtering bin, and a second vertebral plate is fixedly connected in the second filtering bin. The airflow bin is fixedly connected with a second filtering bin, a vertebral plate II and a conical part are fixedly connected in the second filtering bin, the second filtering bin is fixedly connected with a discharging bin, the vertebral plate II is fixedly connected with a material guide pipe, the gear ring is connected with a motor II through a gear, and the airflow bin is connected with an air pump through an air guide pipe. The cement grinding device has the beneficial effects that cement can be scattered through a stirring plate in the storage bin, coarse powder can be filtered out through a first vertebral plate in the first filtering bin and is discharged from a discharging port through a scraper blade, the cement can rotate along a second vertebral plate through the airflow bin, medium powder and fine powder are separated, and finally the medium powder and the fine powder are separated.

This invention provides an environmentally friendly expandable polystyrene bead and its preparation process, belonging to the field of foaming material technology. The preparation process includes the following steps: S1, injecting 65.28g of deionized water into a reaction vessel, stirring, adding 0.13g of dispersant and 0.16g of composite stabilizer, dispersing for 20min, then adding 31.95g of styrene monomer and 0.3g of composite initiator, followed by the addition of pentane and SiO2 micelle composite to obtain a base solution; wherein the mass ratio of pentane to SiO2 micelle composite is 1:(0.2-0.3); the mass of pentane is 3.1%-3.2% of the mass of the base solution; S2, subjecting the base solution to stepwise heating at 86℃-140℃ with stirring, then stopping heating, continuing stirring, and allowing it to cool naturally to 40℃, then stopping stirring, with a total reaction time of 8.5-9.5h to obtain the reaction product; S3, discharging the material, washing the reaction product with warm water, filtering, and obtaining the environmentally friendly expandable polystyrene beads. This invention improves the average particle size of expandable polystyrene beads while reducing fine powder.

The invention discloses a grading grinding vertical mill and a using method thereof, and relates to the technical field of vertical mills.The grading grinding vertical mill comprises a mill shell, a millstone grading rotor and an eddy current restraining flow guide cover assembly, the grading rotor is fixedly installed on the upper portion of the inner wall of the mill shell, and a millstone is fixed below the grading rotor; and a vortex suppression flow guide cover assembly is fixedly mounted on the inner wall of the mill shell and located on the periphery of the grading rotor, and the vortex suppression flow guide cover assembly is used for guiding airflow to uniformly and stably flow to a blade area of the grading rotor. According to the invention, the eddy current suppression flow guide cover assembly is mounted, so that active suppression of three-dimensional turbulence in a classification area is realized, the problems of over-grinding of fine powder and running of coarse particles caused by airflow turbulence induced by a high-speed rotor are solved, the classification precision is improved, and the classification power consumption is reduced.

The invention relates to a preparation method of a refractory material, in particular to a preparation method of a high-corrosion-resistance low-carbon magnesia-carbon refractory material. The high-corrosion-resistance low-carbon magnesia-carbon refractory material is prepared from fused magnesite aggregate, fused magnesite fine powder, Ti3SiC2 powder, crystalline flake graphite, corundum slag and phenolic resin. The prepared low-carbon magnesia-carbon refractory material has excellent oxidation resistance and slag corrosion resistance, the service life of the magnesia-carbon refractory material under the large scrap ratio smelting condition can be prolonged, and the cost is reduced from the perspective of refractory raw materials, so that the low-carbon magnesia-carbon refractory material has high economic benefits, meanwhile, the carbon content of the refractory material is lower, and the cost is lower. And high-temperature industrial carbon emission can be reduced. The oxidation index of the magnesia-carbon refractory material is 20-30% after the magnesia-carbon refractory material is oxidized in an air atmosphere of 1600-1700 DEG C for 2-5 h; and after the magnesia-carbon refractory material is eroded for 1-3 hours under the dynamic slag condition of 1600-1700 DEG C, the erosion index of the magnesia-carbon refractory material is 0.5-4%.

The invention discloses a neodymium-iron-boron magnet material and a preparation method and application thereof. The preparation method of the neodymium-iron-boron magnet material comprises the following steps that S1, a main alloy raw material composition and an auxiliary alloy raw material composition are smelted and cast, and a main alloy sheet and an auxiliary alloy sheet are obtained; s2, the main alloy sheet and the auxiliary alloy sheet are mixed and then subjected to hydrogen decrepitation, and coarse powder is obtained; or the main alloy sheet and the auxiliary alloy sheet are subjected to hydrogen decrepitation to obtain main alloy coarse powder and auxiliary alloy coarse powder, and the main alloy coarse powder and the auxiliary alloy coarse powder are mixed to obtain coarse powder; then, the coarse powder is subjected to jet milling, and fine powder is obtained; s3, pressing the fine powder to obtain a green body; s4, sintering the green body to obtain a neodymium iron boron matrix; and S5, carrying out grain boundary diffusion on the neodymium iron boron substrate. The neodymium-iron-boron magnet material disclosed by the invention has excellent magnetic performance and can have ultrahigh residual magnetism and high coercive force at the same time.

The invention relates to the technical field of batteries, and discloses a positive electrode material and a preparation method thereof, a lithium battery and a power utilization device, the positive electrode material comprises Lin (NixCoyMnzM1-x-y-z) O2, n is more than or equal to 0.95 and less than or equal to 1.15, x + y + z is more than or equal to 0.96 and less than or equal to 1, and M is at least one of Al, Ce, Fe, P, W, Co, Mo, Sr, Sb, Ta, Nb, Y, Mg, Ti and Zr; i50 = D50 / p is greater than or equal to 1.01 and less than or equal to 1.4; d1 is greater than or equal to 1.3 mu m, and the particle size p is the average value of the caliper diameter of the positive electrode material measured under a scale in an SEM graph. The positive electrode material is good in particle dispersity, high in particle uniformity, narrow in particle size distribution and low in fine powder content, has relatively high mechanical strength and structural stability, is used as a positive electrode material in a lithium battery, and can effectively improve the first charge-discharge capacity and efficiency, the cycle stability, the rate capability and the thermal stability of the lithium battery.

The utility model relates to the technical field of roller type crushers, in particular to an anti-blocking dust suppression device of a roller type crusher, and aims to solve the problems that the service life of a conveying belt is shortened due to material impact, material flow is scattered, and fine powder emits dust. The device comprises a buffering discharging assembly and a falling material crushing assembly. The buffering discharging assembly comprises a step buffering plate. The blanking crushing assembly comprises two roller conveyors which are oppositely arranged; the buffer discharging assembly is arranged at the lower part of a crushing roller of the roller type crusher; the falling material crushing assembly is arranged on the lower portion of the buffering discharging assembly. The stepped buffer plate can effectively slow down the falling speed of the materials, the materials are prevented from directly falling from the high position to impact the conveying belt, the roller type conveyor can crush the falling large materials, and blocking caused by the large materials is avoided.

To provide a hydraulic composition having flowability, fluidity retention property, and strength development property, and capable of reducing a carbon dioxide balance.SOLUTION: A hydraulic composition containing water, at least one aggregate selected from a fine aggregate and a coarse aggregate, a powder containing a binding material, and a chemical admixture is such that: at least one condition selected from the conditions that the powder contains CO2 fixing fine powder, the fine aggregate contains CO2 fixing modified and recycled fine aggregate, and the coarse aggregate contains CO2 fixing modified and recycled coarse aggregate is satisfied; a mass ratio (water / binding material) of water to the binding material contained in the powder is 0.3-0.9; and a content of the chemical admixture is 0.02-1.0 pt.mass based on 100 pts.mass of the binding material.SELECTED DRAWING: None

The invention provides a prebaked anode with high compressive strength. The prebaked anode comprises the following raw materials: 68-85 parts by mass of calcined petroleum coke particles; 12-25 parts by mass of a modified coal pitch binder, wherein the softening point of the modified coal pitch binder is 105-115 DEG C; and 0.3-0.8 part by mass of a whisker reinforcing agent. The production process comprises the following steps: calcining, crushing and grading, modifying fine powder, preparing a binder, mixing and kneading, forming and roasting. The prebaked anode has the advantages that through multi-stage material collaboration and process innovation, under the condition that an existing production line is not changed at all, the core contradictions that the prebaked anode is insufficient in strength, poor in conductivity and poor in high-temperature stability are synchronously solved.

The invention discloses a method for improving the utilization rate of nickel-based powder superalloy, which comprises the following steps: preparing alloy powder from mother alloy through a powder preparation process, screening the alloy powder to obtain powder with the particle size of less than 150 microns, and dividing the powder into fine powder and coarse powder; wherein the fine powder refers to powder with the particle size smaller than 53 micrometers, the coarse powder refers to powder not smaller than 53 micrometers, and the alloy is prepared from the fine powder and the coarse powder through a forming process. The invention further provides application of the alloy prepared through the method to hot end components of aerospace, ships and energy power systems. The applicant provides the method for improving the utilization rate of the nickel-based powder high-temperature alloy and the related alloy, and verifies that coarse powder with the particle size of 53-150 microns and fine powder with the particle size of 18-53 microns are on the same level in structure form and comprehensive mechanical property, and the powder utilization rate is greatly improved.

The preparation process comprises the following steps: uniformly mixing 80-90 parts by mass of fused mullite, 1-2 parts by mass of modified ZrSiO4 fine powder, 5-8 parts by mass of alpha-Al2O3 fine powder, 2-4 parts by mass of silicon powder, 3-5 parts by mass of aluminum powder and 3-5 parts by mass of mullite microsphere powder, adding 5-8 parts by mass of a binding agent, and uniformly mixing to obtain pug; the preparation process of the mullite microspheres comprises the following steps: mixing bauxite, feldspar and silica powder, adding water, grinding into slurry, carrying out spray drying, sintering, and rapidly cooling after sintering; the pug is sealed and stacked for 12-24 h and then subjected to high-pressure forming, and a blank is obtained; and gradually heating the blank to 120 DEG C, drying for 24-48 hours, and firing and molding. The ultralow-porosity anti-erosion brick is low in porosity and good in anti-erosion performance.

The invention relates to the technical field of refractory materials, in particular to a regenerated magnesia wet gunning mix and a preparation method thereof. The regenerated magnesia wet gunning mix is prepared from the following raw materials: 60-75 wt% of regenerated magnesia; 8 wt%-18 wt% of sintered magnesia fine powder; 9 wt%-14 wt% of a binding agent; 4 wt%-8 wt% of a functional additive; the sum of the dosages of all the components is 100%. The binding agent comprises a sol aqueous solution, a polyphosphate complexing agent and cement; the functional additive comprises an aqueous solution of a cationic polyacrylamide flocculant, a nano material and explosion-proof fibers. The comprehensive performance of the regenerated magnesia wet gunning mix provided by the invention is excellent.

The application discloses a method for preparing auxiliary cementitious material and concrete products by carbonizing steel slag with industrial kiln tail gas, and steps are as follows: original steel slag is crushed, iron is removed, and screening is performed, so that a steel slag coarse-fine aggregate mixture and steel slag fine powder are obtained; the steel slag coarse-fine aggregate mixture is carbonized to obtain carbonized coarse aggregate and carbonized fine aggregate; the steel slag fine powder is ground to obtain steel slag micro-powder, the steel slag micro-powder is made into a cake to obtain a steel slag cake; the steel slag cake is subjected to carbonization treatment, and then is dried and ground to obtain a steel slag-based auxiliary cementitious material; the steel slag-based auxiliary cementitious material, silicate cement clinker powder and gypsum powder are mixed to obtain a new low-carbon cementitious material; the carbonized coarse aggregate, the carbonized fine aggregate, the new low-carbon cementitious material and sand are mixed and pressure-formed, and are subjected to carbonization treatment, so that a steel slag multi-stage carbonized product is obtained. The application effectively improves the carbonization rate and carbonization strength through the multi-stage carbonization technology, and avoids the occurrence of uneven carbonization caused by the fact that CO2 carbonization cannot reach the inside of particles.

The invention relates to the technical field of high polymer materials, and particularly discloses a production process of spherical wax micropowder, which comprises the following steps: melting solid wax into a wax melt, and preserving at a constant temperature in an environment which is at least 20 DEG C higher than the melting point of the wax; the wax melt and hot water are mixed according to the flow ratio of 1: (10-20) and then sprayed out to form mist spray, the mist spray enters mist spray pool water with the temperature of the wax melting point + / -5 DEG C, and wax liquid drops in the mist spray are subjected to condensation polymerization in the mist spray pool water to form spherical wax melt; the spherical wax melt gradually rises into cooling water flow in the water of the spraying pool, the temperature of the cooling water flow is 10-20 DEG C lower than the wax melting point, the spherical wax melt flows in the cooling water flow and is cooled, the spherical wax melt is separated from the cooling water flow, and dewatering and drying are conducted to obtain the spherical wax micro powder. The process can improve the sphericity and particle size uniformity of the wax micro powder.

The invention belongs to the technical field of shale gas preparation, particularly relates to a shale gas desorption pressure testing device and method, and provides the following scheme aiming at the problem that an existing desorption pressure testing device cannot crush a shale sample in the testing device: the shale gas desorption pressure testing device comprises a box body, and one side of the box body is connected with a box door through a hinge; a handle is fixedly connected to the side, away from the box body, of the box door, a test box is fixedly connected to the inner wall of the bottom of the box body, a sealing door is connected to one side of the test box through hinges, a crushing and screening module is arranged in the test box and comprises a motor, and the output end of the motor is connected with a cam through a coupler. According to the shale gas desorption pressure testing device and method disclosed by the invention, a shale sample can be fully crushed in a state of being isolated from air in the device, and then is screened into required fine-mesh powder, so that the accuracy of desorption data of the shale sample in the device is ensured.

To provide a method for producing PHA, capable of suppressing generation of fine powder without using a binder.SOLUTION: A method for producing a PHA fused body, comprising a step (a) of dehydrating an aqueous PHA suspension to obtain a PHA wet powder having a water content of 5 to 37%, a step (b) of heating the obtained PHA wet powder at 75 °C to 95 °C to obtain a PHA powder having a water content of 0.5% or less, and a step (c) of heating the obtained PHA powder at 100 °C to 150 °C to obtain a PHA fused body.SELECTED DRAWING: None

Equipment for crushing and grading magnesium oxide comprises a composite grading machine, a striking crushing and stripping machine, a spiral feeding machine, a circulating fan, a cyclone separator, a bag-type dust collector and an air compressor, and is characterized in that a crushing and grading unit is upgraded and grafted on the magnesium oxide crushing and grading equipment by utilizing the air flow advantage of closed-loop circulating air; on the basis of ensuring that the content of MgO is not reduced due to the influence of moisture and CO2 in air in the crushing and grading process, heavy MgCO3 fine powder and coarse MgO powder in raw powder are separated and graded to the maximum extent, and a low-grade magnesium oxide product containing a small amount of MgCO3 is obtained through an outlet of a 1 # air-lock valve of a composite grading machine; a high-grade magnesium oxide fine powder main product is obtained through an outlet of a second air-lock valve of the cyclone separator, and a high-grade magnesium oxide superfine powder product is obtained through an outlet of a third air-lock valve of the bag-type dust collector. By adopting a simple mode of coarse particle stripping shell shrinkage crushing instead of coarse particle grinding, the non-calcined magnesite powder is prevented from entering the fine powder, and the amount of the magnesium oxide fine powder is also increased. Operation is simple and easy to control, productivity efficiency is high, production is safe and environmentally friendly, and market application prospects are wide.

The present invention discloses an alkali-resistant castable for a lime rotary kiln working lining, as well as its preparation method and application. The present invention comprises the following raw materials in parts by mass: 100 parts premixed granular material; 50-55 parts premixed fine powder; and 9-13 parts potassium dihydrogen phosphate solution. The premixed granular material comprises magnesia aluminate spinel particles and calcium hexaaluminate particles; and the premixed fine powder comprises magnesia rhodonite fine powder, enstatite fine powder, zirconium boride fine powder, and amorphous Al2O3 fine powder. The alkali-resistant castable for the lime rotary kiln working lining prepared by the present invention has excellent construction performance. After being cast into the lime rotary kiln working lining, it does not require additional heat treatment or firing, thus saving energy. The castable has high high-temperature strength, low bulk density, low thermal conductivity, high alkalinity, strong resistance to alkali corrosion, and is non-ringing and slag-resistant. The castable has good fluidity, ensuring good overall sealing of the lime rotary kiln working lining. The alkali-resistant castable produces no toxic components before and after construction, making it environmentally friendly.

The invention provides a refractory ceramic-based material for a smelting furnace lining and a preparation method of the refractory ceramic-based material, and belongs to the technical field of ceramic refractory materials. The material comprises coated modified fused magnesite main aggregate, ceramic sand main aggregate, surface coated magnesium oxide fine powder, gamma-phase aluminum oxide micro powder, an aluminum dihydrogen phosphate solution, alkaline silica sol, a pre-reaction spinel precursor and zirconium boride micro powder. The coated modified fused magnesite main aggregate is prepared by mixing and sintering fused magnesite, silicon carbide composite powder, chromium sesquioxide powder and phenolic resin powder. And mixing the silicon carbide powder and the magnesium oxide powder, and depositing a silicon nitride layer on the particle surface to prepare the silicon carbide composite powder. The surface-coated magnesium oxide fine powder is formed by coating the surfaces of magnesium oxide fine powder particles with aluminum oxide. The pre-reaction spinel precursor is prepared by the following steps: preparing a mixed salt solution from magnesium nitrate hexahydrate and aluminum nitrate nonahydrate by using deionized water, reacting, aging and carrying out heat treatment. And the ceramic sand main aggregate is made of zirconium oxide. And all the layers are matched for use to realize balanced improvement of performance.

The utility model relates to a target type jet mill which comprises a cylindrical barrel, and a fine powder channel and a coarse powder channel are formed in a grading chamber; the powder grader is mounted in the grading chamber, and a powder outlet of the powder grader is connected with the fine powder channel; the powder supply device is connected with the powder feeding chamber and is suitable for feeding powder into the powder feeding chamber; the powder spraying pipe is installed on the barrel of the powder crushing chamber, an inlet of the powder spraying pipe is connected with a first Venturi powder pump, and a powder return pipe is connected between the first Venturi powder pump and the coarse powder channel. The particle size of the separated crushed powder can be controlled through the powder grader, selection control is carried out in a large particle size range, fine powder meeting the set requirement is discharged from the fine powder channel, coarse powder is collected for centralized treatment while the fine powder is discharged and collected in time, and therefore the powder quality is improved. Coarse powder enters the second Venturi pump through the coarse powder channel and is sprayed out again to be smashed, and the smashing efficiency and quality are improved.

The invention discloses an architectural ceramic wetting and powdering production system, which relates to the technical field of ceramic production systems, and comprises two main process links of dry grinding and fine powder wetting, and wet ball milling and fine powder wetting. Wherein dry grinding comprises a raw material storing and batching device, raw materials in the raw material storing and batching device are classified through dry and wet raw materials, hard stone raw materials are fed into a column crusher to be crushed, and a vertical mill or a dry ball mill is selected according to the comprehensive moisture difference of the raw materials in the formula; a feeding machine in the wet ball milling is communicated with a wet ball mill, the wet ball mill is communicated with a slurry tank, and powder in the slurry tank is treated to obtain dry fine powder; fine powder wetting comprises a wetting tower, powder of the wetting tower is fed into a drum screen, and the drum screen feeds the powder into a self-flowing type powder waking bin. According to the invention, the selection of the vertical mill or the dry ball mill can be determined according to the water content in the raw material formula, and the dry fine powder is wetted by the wetting tower, so that compared with a traditional wetting mode, the wetting tower can more uniformly wet the dry fine powder.