114 results about "Grog" patented technology

The invention discloses a method for preparing a low-clinker composite mortar material from granite weathered construction engineering residue soil and mortar. The method comprises the following steps: settling and screening engineering residue soil, and respectively carrying out biomimetic mineralization modification, particle size allocation and proportioning on powdery clayey soil and coarse particles to form mixed mortar; according to the mixed mortar, granite weathering type constructional engineering muck solid waste can be fully utilized, the recycling rate reaches 96%, the performance of the mortar is improved by introducing a biomimetic mineralization modification technology, conditions are mild, no harmful by-products exist, and the mechanical performance of the composite mortar is excellent. Through a biomimetic mineralization modification technology, after the prepared mortar is cured for 28 days, the highest compressive strength can reach 65.45 MPa, and the compressive strength is superior to that of traditional OPC mortar, fly ash composite mortar and untreated muck mortar.

The invention discloses a spodumene concentrate resourceful treatment method which comprises the following steps: carrying out wet treatment on spodumene acid clinker to prepare lithium-removed filter residues and leachate; carrying out neutralization treatment and desulfurization treatment on the leachate to obtain a lithium-containing purified solution, gypsum and iron oxide red, and carrying out lithium extraction treatment on the lithium-containing purified solution to obtain a lithium salt and mirabilite; the lithium-removed filter residues are treated through a process combining a beneficiation method and a chemical method, and water glass, nano kaolinite, ceramsite aggregate and tantalum-niobium concentrate are obtained. According to the method, whole-process slag-free production of the spodumene concentrate is achieved, and meanwhile the lithium-containing compound with the high purity and the high quality is obtained; and various valuable products can be obtained.

The invention relates to glass powder as well as a preparation method and application thereof. The glass powder is prepared from raw materials including an inorganic mixture and glass clinker, by taking the total mass of the preparation raw materials of the glass powder as 100wt%, the percentage contents of the inorganic mixture and the oxides contained in the glass clinker are as follows: 40wt%-54wt% of SiO2, 5wt%-9wt% of Al2O3, 10wt%-30wt% of SrO, 5wt%-8wt% of B2O3, 5wt%-15wt% of ZrO2, 0wt%-5wt% of CaO, 1wt%-8wt% of MgO, 1wt%-2wt% of Y2O3 and 0wt%-5wt% of a sodium-potassium mixture. The glass powder provided by the invention does not contain barium element, and has good biological safety, X-ray developing capability and low-temperature chemical stability. According to the preparation method provided by the invention, impurities are prevented from entering the glass powder, and the glass powder is high in quality and good in batch stability.

The invention belongs to the field of manufacturing of refractory materials for glass brick kilns, and particularly relates to a vertical casting process and device for an electric smelting AZS shrinkage-cavity-free pool wall brick. The vertical casting process for the electric smelting AZS shrinkage-cavity-free pool wall brick comprises the following steps that aluminum oxide, zircon sand, desilicated zirconium, sodium carbonate and AZS clinker are added into an electric furnace to be smelted into feed liquid; after melting is completed, the electric furnace is inclined, feed liquid flows into the feed liquid storage area from the hearth through the furnace nozzle flow guide area and then vertically flows into the quartz sand mold through the lower flow opening, and therefore vertical casting of the feed liquid is achieved. According to the vertical casting process for the electrically-fused AZS shrinkage-cavity-free pool wall brick, air holes in the surface of the AZS electrically-fused brick can be effectively reduced, the machining amount is reduced, the machining efficiency is improved, and the manufacturing cost is reduced; the invention also provides a device used by the method.

This invention relates to a long-life aluminosilicate refractory material for glass kilns, belonging to the technical field of refractory materials. The long-life aluminosilicate refractory material for glass kilns of this invention comprises, by weight percentage: 50-75 wt% bauxite clinker, with an Al2O3 content ≥85 wt%; 15-30 wt% silicon carbide powder, with a SiC content ≥98 wt%; 3-10 wt% boron nitride micropowder, with a BN content ≥99 wt%; and 2-10 wt% albite. The additives are sodium carboxymethyl cellulose and aluminum orthophosphate sol, with the sodium carboxymethyl cellulose used at 0.3-0.8 wt% of the total raw material weight, and the aluminum orthophosphate sol used at 3-6 wt% of the total raw material weight. The refractory material is fired under a nitrogen atmosphere. This long-life aluminosilicate refractory material for glass kilns breaks through the performance limits of traditional aluminosilicate refractory materials, providing key material support for the green and low-carbon development of the glass industry.

The invention relates to the field of ultrahigh-temperature ceramic materials, and discloses rare earth element doped quinary high-entropy boride powder and a preparation method thereof. The preparation method of the rare earth element doped quinary high-entropy boride powder comprises the following steps: 1) taking metal oxide powder, boron carbide powder and graphite powder as raw materials, and performing wet mixing to prepare mixed powder, 2) briquetting the mixed powder to prepare a green body, putting the green body into a high-temperature carbon tube furnace into which protective gas is introduced, heating, and carrying out pressureless sintering to obtain clinker; and 3) grinding the clinker to obtain the rare earth element doped high-entropy boride powder. The rare earth element doped quinary high-entropy boride powder prepared by the method has the advantages of high purity, no impurity phase, uniform metal element distribution and high rare earth element content, the preparation process is simple, the cost is low, the reaction temperature is lower, and large-scale production is facilitated.

The invention provides a preparation process of a high-performance refractory material based on regulation and control of a dolomite crystal form. The preparation process specifically comprises the following steps: step 1, weighing raw materials; step 2, pre-sintering the raw materials: respectively putting the weighed corundum, dolomite, quartz sand and mullite into a high-temperature furnace for high-temperature pre-sintering at the high-temperature pre-sintering temperature of 500-600 DEG C, heating and pre-sintering for 15-25 minutes, then taking out, and placing the pre-sintered corundum, dolomite, quartz sand and mullite clinker for later use; when the device is used, raw materials are pushed by the spiral auger to flow in the conveying holes from bottom to top, the thickness between the raw materials is reduced when the materials flow in the conveying holes, and the raw materials are matched with the heating columns on the inner walls of the conveying holes to achieve rapid temperature rising and heating; and the raw materials are pushed by the spiral auger to move upwards to the top of the fixed barrel to be stirred and mixed again.

This invention belongs to the field of inorganic non-metallic materials technology, and specifically relates to a low-carbon, high-iron sulfoaluminate cementitious material based on steel slag solid waste. It comprises the following raw materials in parts by weight: limestone 35-55 parts, anhydrite 10-20 parts, bauxite 20-45 parts, modified steel slag A 8-15 parts, and modified steel slag B 5-10 parts. Modified steel slag A is activated by acid / alkali, doped with calcium fluoride / sodium sulfate / titanium dioxide and calcined, and then in-situ co-precipitated to introduce magnesium aluminum spinel nanocrystals. This is used for raw material calcination, which can reduce the calcination temperature, refine the clinker grains, and improve early strength. Modified steel slag B is activated by acid / alkali, doped and calcined, and coated with silane coupling agent / polyvinyl alcohol / silica ball milling. It is incorporated as a blending material to improve the interface, slow-release hydration, and improve later-stage strength. This invention achieves high-value utilization of steel slag through synergistic modification, and the cementitious material has advantages such as low carbon content, early and high strength, suitable setting time, and excellent stability.

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

This invention provides an M5Si3 type high-entropy aluminum silicide ceramic material, its preparation method, and its applications, belonging to the field of high-entropy ceramic technology. The invention involves mixing elemental metal powder, aluminum powder, and silicon powder, followed by wet ball milling to obtain a mixed powder. The mixed powder is then pressed into a green body and flash-sintered to obtain an M5Si3 type high-entropy aluminum silicide clinker. This clinker is further pressed into a green body and then spark-plasma sintered to obtain the M5Si3 type high-entropy aluminum silicide ceramic. The M5Si3 type high-entropy aluminum silicide ceramic of this invention exhibits excellent resistance to prolonged high-temperature oxidation at 2400 °C. Furthermore, its preparation method is simple in operation and process flow, has good reproducibility, and a short reaction time, making it suitable for component control and large-scale industrial production. It has a very broad application prospect in the field of hot-end structure protection for hypersonic vehicles.

The invention relates to the technical field of stemming refractory materials, and discloses an expansion iron mouth type anhydrous stemming for a blast furnace of more than 2000 cubic meters. The expansion iron mouth type anhydrous stemming comprises the following components in percentage by mass: 3-4% of high-temperature asphalt particles, 13-20% of ferro-silicon nitride, 10-13% of clay, 0.5-2% of carbon black, 3-5% of pyrophyllite, 31-39% of alumina clinker, 13-18% of silicon carbide, 5-7% of coke powder, 1-3% of polyethylene glycol and 12-13% of tar. According to the method, polyethylene glycol 200 is used as a binding agent, the characteristic that the polyethylene glycol 200 forms curing strength at 250-350 DEG C is utilized, the polyethylene glycol 200 and beta resin in high-temperature asphalt powder complete temperature relay to form carbon coke, a balling drum is rapidly stabilized within 15-30 minutes of gun pressing, and the iron notch depth is increased; according to the invention, the problem of strength of the stemming at 250-350 DEG C is effectively solved, good opening strength and enough iron notch depth are realized, the application effect on 2650 m < 3 > and 4000 m < 3 > blast furnaces is good, and the iron notch depth is respectively prolonged by 0.2 m and 0.4 m.

The application discloses a high-entropy rare earth boride ceramic material and a preparation method and application thereof. The preparation method of the high-entropy rare earth boride ceramic material comprises the following steps: 1) mixing metal oxide powder and boron carbide powder, grinding to prepare mixed powder, and then pressing to prepare a green body; 2) embedding the green body into graphite felt, and then placing the green body in a protective atmosphere to perform electric field sintering to prepare a sintered material; 3) grinding the sintered material into powder, screening, taking the screened sintered material powder, pressing and cold isostatic pressing to form a sintered material blank; and 4) embedding the sintered material blank into graphite felt, and then placing the sintered material blank in a protective atmosphere to perform electric field sintering under normal pressure. The high-entropy rare earth boride ceramic material has the advantages of a huge component space, uniform metal element distribution, a composition content close to a designed proportion, excellent mechanical properties, adjustable performance and the like, and the preparation process is simple, the reaction time is short, the equipment requirement is low, and the preparation cost is low, so that the high-entropy rare earth boride ceramic material is beneficial to large-scale industrial production.

The application belongs to the technical field of building materials, and particularly discloses a semi-flexible pavement grouting material, a preparation method and a use method thereof. The semi-flexible pavement grouting material comprises the following raw material components: high-free calcium belite sulphoaluminate clinker, gypsum, granulated blast furnace slag powder and fly ash cenospheres; wherein the high-free calcium belite sulphoaluminate clinker comprises the following mineral components: anhydrous calcium sulphoaluminate, free calcium sulphate, free calcium oxide, belite and iron phase. The application uses a large amount of industrial waste such as gypsum, granulated blast furnace slag powder, fly ash cenospheres and steel slag powder as main raw materials, and adds high-free calcium belite sulphoaluminate clinker, amorphous calcium aluminate and silica fume and the like, so as to utilize the synergistic effect of the components and prepare a high-strength semi-flexible pavement grouting material. The application effectively solves the problems of low strength, poor water resistance and poor durability of the grouting material under a large amount of gypsum.

The utility model belongs to the technical field of rotary kilns, and particularly relates to a rotary kiln stirring device which comprises a hollow shaft, the left end and the right end of the hollow shaft are both fixedly connected with fixing discs, and the surface of the hollow shaft is fixedly connected with a plurality of material crushing columns distributed in an annular array. A reinforcing plate is fixedly connected to the position, located between every two adjacent crushing columns, of the surface of the hollow shaft, the reinforcing plates are fixedly connected with a fixed disc, and an auxiliary mechanism is arranged on the fixed disc. According to the scheme, by arranging the hollow shaft, the fixed disc, the balancing weight and other structures, when the rotary kiln rotates, the hollow shaft, the balancing weight and other components can be driven to rotate under the action of gravity, clinker in the rotary kiln can be dispersed and can roll in the rotary kiln under the structures such as the material crushing columns, the material crushing rods and the reinforcing plates, and the clinker in the rotary kiln can be uniformly dispersed; therefore, the material stirring effect is improved; and caked and ring-formed mixed materials can be effectively mashed, so that the roasting efficiency is improved.

This invention relates to a method and system for the combined processing of Bayer process red mud and low-grade bauxite. The method includes: separately detecting the aluminum and silicon content in the red mud and bauxite, mixing the red mud and bauxite according to the detection results to achieve an aluminum-to-silicon ratio greater than 1 in the resulting raw material, adding a calcination aid, and calcining to obtain clinker. The clinker undergoes multiple cycles of water leaching and primary desilication treatment until the aluminum-to-silicon ratio in the solution is greater than 300 and the vanadium content reaches 2 g / L, at which point deep desilication is performed. The deep desilication solution is then carbonated to extract aluminum. Ammonium salts are added to the resulting solution to further extract vanadium. The final solution is crystallized and used as a calcination aid. The water leaching residue from the water leaching treatment is acid-leached, aged, and hydrolyzed to polymerize, yielding calcium sulfate, silica gel, and a water purification agent, respectively. This invention effectively utilizes both major and rare elements, solving the problems of red mud accumulation and the ineffective utilization of low-grade bauxite.

The invention provides a high-strength heat-insulating castable for a furnace top of an aluminum melting furnace and a preparation process of the high-strength heat-insulating castable, and belongs to the technical field of refractory materials for the aluminum melting furnace. The refractory castable product is prepared from the following raw materials: medium-low-density alumina clinker with the particle size of 8-1mm and the volume density of 1.50-2.60 g / cm < 3 >, high-alumina bauxite with the particle size of 1-0.088 mm and less than or equal to 0.074 mm, aluminum oxide micro powder with the particle size of less than or equal to 5mu m, silicon dioxide micro powder with the particle size of less than or equal to 2mu m, a sintering aid, an explosion-proof agent, a reinforcing agent, a water reducing agent and a binding agent. According to the invention, the middle-low density alumina clinker is selected as a main raw material, and the anti-explosion agent and the reinforcing agent are supplemented, so that the prepared castable has the breaking strength of 18-31 MPa at the high temperature of 1200 DEG C and the heat conductivity coefficient of 0.20-0.40 W / (m.K).

The invention relates to a construction binder comprising: - 35% to 65% by weight of clinker, - 5% to 30% by weight of a calcined clay matrix, - 5% to 30% by weight of a raw clay matrix, and - 0.05% to 5% by weight of a deflocculating agent; and the mass ratio of the raw clay matrix to the calcined clay matrix is ​​0.2 to 7. The invention further relates to a construction material comprising a construction binder according to the invention.

The invention relates to the technical field of frit recovery, in particular to an environment-friendly recovery treatment system for waste and defective frits, which is characterized in that an extrusion roller is driven to intermittently impact a driven inner cylinder according to a sharp-petal track through lifting switching of an adjustable gear ring and revolution and autorotation composite motion of a path grooved wheel, and a complete difference between low-toughness instant fragmentation of glass and high-toughness maintenance of clinker is utilized; selective crushing is realized; and the middle shifting arm synchronously gathers the large clinker and the glass together in the impact gap and maintains vertical layering, so that the large clinker is hit and the small clinker penetrates through the screen. The timing input bin is used for quantitatively pushing the raw materials in the buffer tank into the bottom execution bin in a crank-slider manner, so that overload or empty beating is avoided; the screening base drives the driven inner cylinder to continuously rotate through the rotating shifting arm, cullet is thrown out and collected once the cullet is smaller than the aperture of the screen, clinker is retained and continuously hit, the whole process is closed, the glass recovery rate is larger than or equal to 95%, the clinker inclusion rate is smaller than or equal to 3%, and waste and defective glass materials are recycled in an environment-friendly, efficient and high-value mode.

The invention provides an alumina clinker calcining device and a clinker calcining method thereof, and relates to the field of material calcining, the alumina clinker calcining device comprises a mounting base, a mounting rack is arranged at the top end of the mounting base, a calcining mechanism is arranged at the top end of the mounting rack, and the calcining mechanism is movably connected with a feeding mechanism. The calcining mechanism is arranged to effectively calcine alumina clinker, and meanwhile, the feeding mechanism is arranged, so that the problems that according to a traditional calcining device, untreated alumina raw materials directly enter a calcining cavity, large-particle raw materials are prone to being accumulated at the bottom to form a heat insulation layer, small-particle raw materials suspend on the upper portion, and the raw materials are prone to being burnt are effectively solved. The heating time and strength differences of the raw materials in different forms are obvious, and the phenomenon of insufficient combustion generally exists.

The invention discloses a refractory mortar sheet-shaped prefabricated body as well as a preparation method and a construction method thereof, and belongs to the technical field of refractory mortar. The refractory mortar flaky preform is prepared from the following raw materials: 70 to 80 percent of porous bauxite clinker, 5 to 10 percent of quartz powder, 5 to 10 percent of silica powder, 0.5 to 1.0 percent of isothiazolinone derivative, 3 to 6 percent of passivated aluminum powder, 0.1 to 0.3 percent of tricalcium aluminate and 3 to 5 percent of yellow dextrin. 10-15% of a polyvinyl alcohol solution is added; the mass ratio of polyvinyl alcohol to water in the polyvinyl alcohol solution is 1: (18-20); the preparation method comprises the following steps: uniformly mixing the raw materials, pressing into slices and curing. The refractory mortar sheet-shaped prefabricated body has a rich microporous structure, has heat insulation property and moisture permeability, also has good forming strength and good plasticity and high-temperature performance after wetting, realizes a construction mode of on-site unpacking and ready-to-use, greatly improves the construction efficiency, and is suitable for high-efficiency masonry of industrial kiln masonry.

The invention belongs to the technical field of building materials, and particularly discloses a low-carbon waste-utilizing high-performance ceramic tile adhesive and a preparation method thereof. The low-carbon waste-utilizing high-performance ceramic tile adhesive is mainly prepared from high-free-calcium belite sulphoaluminate clinker, granulated blast-furnace slag powder, gypsum and sand. The high-free-calcium belite sulphoaluminate clinker is applied to the ceramic tile adhesive, and the raw materials of the ceramic tile adhesive are further reasonably designed, so that the 28d tensile adhesive strength of the prepared ceramic tile adhesive and the tensile adhesive strength of the prepared ceramic tile adhesive after freeze-thaw cycle, soaking, thermal aging and airing for 20 minutes are both greater than or equal to 2 MPa, and the tensile adhesive strength of the prepared ceramic tile adhesive after freeze-thaw cycle, soaking, thermal aging and airing for 20 minutes is greater than or equal to 2 MPa. And the prepared ceramic tile adhesive has excellent strength, heat resistance, water resistance and freezing resistance.

The application provides a grate cooler capable of measuring and controlling the thickness distribution of a material layer, and relates to the technical field of the grate cooler.The grate cooler capable of measuring and controlling the thickness distribution of a material layer comprises a supporting seat, a feeding box is fixedly connected to one side of the top of the supporting seat, a cooling box is fixedly connected to the middle of the top of the supporting seat, a discharging box is fixedly connected to the other side of the top of the supporting seat, a hydraulic cylinder is fixedly connected to the top of one side of the feeding box, a discharging hopper is penetrated through and fixedly connected to the top of the feeding box, a material distribution assembly is arranged on the inner wall of the discharging hopper, and second servo motors are fixedly connected to the top of both sides of the cooling box.By opening the first servo motor, the first servo motor output end drives the gear to rotate, thereby driving the baffle to move up and down through the rack, so as to control the speed of discharging, make the clinker evenly distributed on the grate bed, avoid local accumulation, and ensure the stability of the raw material feeding.

This invention belongs to the field of functional ceramic materials preparation, and particularly relates to a functional ceramic material for aging baijiu (Chinese white liquor) that adheres to the inner wall of a ceramic wine storage container and its application. It is made from the following raw materials by weight: raw material, cooked material, and auxiliary additives. The raw material and cooked material are each made from the following components by weight: 30-40 parts clay and 25-40 parts purple clay. The auxiliary additives are made from the following components by weight: 5-10 parts binder, 20-30 parts water, 2-3 parts water-reducing agent, 0.5-1 part CuO, 0.5-1 part ZnO, and 0.5-1 part BaO. The functional ceramic material for aging baijiu described in this invention has a water absorption rate of 1-3% and a porosity of 80-85%. According to professional wine tasters, when baijiu is stored in the wine storage container of this invention, the spiciness of the baijiu is reduced, the taste is better, smoother, and more mellow, the aftertaste is sweet and rich, aldehydes are reduced, and esters are increased.

This application relates to the technical field of sanitary ceramics preparation, specifically disclosing a repair agent for sanitary ceramic dry blanks and its preparation method. The repair agent for sanitary ceramic dry blanks includes molten metal powder, silica powder, raw material, glaze slurry, sodium carboxymethyl cellulose solution, and medium-temperature frit powder. The preparation method involves mixing the glaze slurry and raw material in the sodium carboxymethyl cellulose solution, and then adding the molten metal powder, silica powder, and medium-temperature frit powder to the prepared slurry and mixing thoroughly. The repair agent for sanitary ceramic dry blanks of this application can be used to repair sanitary ceramic dry blanks with defects such as cracks, and it has the advantage of reducing the adverse effects on the yield of high-quality blanks.

The invention discloses a ceramic green body wet-method powdering process utilizing recycled waste materials. The process comprises the following steps: A, standing and precipitating ball washing slurry containing a dispergator; b, the sediment is pumped into a transfer pool, the polishing waste residues are put into the transfer pool to be mixed and ball-milled, and first slurry is obtained; c, adding water into the raw waste powder with the fineness of less than 250 meshes for slurrying, and removing iron and impurities by sieving to obtain second slurry; d, performing dry grinding on the hard clinker of which the water content is less than 5wt% to obtain hard cooked powder, preparing a green body raw material, mixing the hard cooked powder with the green body raw material, and performing ball milling to obtain third slurry; e, the first slurry, the second slurry and the third slurry are put into a large slurry tank to be homogenized, green body slurry is sprayed into a spray tower to be subjected to wet-method powder making, and ceramic powder is obtained. According to the scheme, on the premise that the production quality of the ceramic green bodies is guaranteed, the recycling waste is classified, the utilization ratio of the recycling waste is increased, and the raw material cost of the ceramic green bodies is reduced.

The application discloses an anti-erosion expansion anti-cracking agent for concrete and a preparation method thereof, and belongs to the field of admixtures for building materials. The anti-erosion expansion anti-cracking agent comprises the following raw materials: modified expansion clinker, low-activity magnesium oxide expansion agent, semi-dense silica fume, alumina ceramic micro powder, modified hydration heat regulating material, water reducing agent, shrinkage reducing agent and perlite. The preparation method of the modified expansion clinker is as follows: under the stirring state, a surface modifier with a mass fraction of 2% to 4% of the expansion clinker is sprayed into the expansion clinker, the surface modifier comprises a polymer solution and polyvinyl alcohol, and the polymer solution comprises at least one of styrene-acrylate emulsion or butadiene-styrene emulsion. The preparation method of the modified hydration heat regulating material is as follows: an acid catalyst is added to dry starch in a spraying mode. The anti-erosion expansion anti-cracking agent has the characteristics of reducing the hydration temperature rise of concrete, slowing down the autogenous shrinkage and drying shrinkage, continuously expanding slightly, improving the anti-erosion effect of concrete and the like, and can significantly improve the anti-erosion strength of the concrete.

The application relates to a gypsum clinker and a preparation method thereof. The method comprises the following steps: firstly, calcining dihydrate gypsum raw materials at high temperature; and then, removing the crystal water in the gypsum through low-temperature calcination. Through the process of controlling temperature in stages, the gypsum clinker with low specific surface area can be efficiently prepared. The technical scheme of the application not only significantly shortens the calcination time of gypsum and effectively reduces the energy consumption of the clinker preparation link, but also greatly reduces the water consumption in the subsequent gypsum product forming due to the low specific surface area of the obtained clinker, so that the energy consumption in the product production process is further reduced.

This invention discloses a method for preparing mullite porous ceramics by adding urea fluorosilicate. The preparation method includes the following steps: accurately weighing the following basic raw materials by mass fraction: kaolin clinker and alumina micro powder; slowly adding urea solution dropwise to fluorosilicic acid solution while continuously stirring throughout the process, and obtaining urea fluorosilicate solution after the system is homogeneous; adding urea fluorosilicate solution, kyanite, mullite whiskers and water to the basic raw materials, mixing evenly and pouring into a mold; placing the mold in an oven at 60~90℃ for sealing and curing for 2~6 hours; after molding, demolding and drying for 24~48 hours, and then holding at 1450℃~1600℃ for 2~4 hours, a mullite porous ceramic with a through-pore structure, high porosity, low thermal conductivity, good flexural strength and dimensional stability is obtained.

The lithium salt calcining system for the lime rotary kiln production line comprises a lithium salt batching and conveying system, a vertical preheater, a rotary kiln, a grate cooler and a clinker conveying unit, the output end of the lithium salt batching and conveying system is connected with a top feeding port of the vertical preheater, and the bottom of the vertical preheater is fixedly installed at a kiln tail smoke chamber. The kiln tail smoke chamber is fixedly installed at one end of the rotary kiln, the vertical cooler is fixedly installed at the other end of the rotary kiln, a discharging port of the vertical cooler is connected with a feeding port in the top of the grate cooler through a flow guide plate, and a discharging port of the grate cooler is connected with a feeding port of the clinker conveying unit. The system is suitable for preheating of powdery raw materials and cooling of clinker with wide particle size distribution, the overall heat exchange efficiency is high, the energy consumption is low, and the lithium salt production capacity is high.