608 results about "Corundum" patented technology

According to the mullite castable preparation method based on comprehensive utilization of the secondary aluminum ash nonferrous smelting slag, components are regulated and controlled by controlling the molar ratio of Al2O3 to SiO2, so that porous light mullite stably falls into a mullite phase region, and generation of excessive corundum phases is avoided. PMMA microspheres, corn flour, carbonized rice husks and SiO2 coated calcium carbonate composite pore-forming agent systems are adopted, and a layered slurry formula, gradient slip casting and segmented sintering processes are combined, so that the porosity and strength distribution are accurately regulated and controlled, and low-temperature sintering and amorphous phase change control are realized. By optimizing the grading of the porous light mullite aggregate and adding the homologous fine powder, the bonding strength and compressive strength of the castable are improved. And finally, the surface of the castable is coated with a compact mullite coating, so that the porosity is reduced, and the erosion resistance, corrosion resistance and stripping resistance are remarkably improved. The obtained castable has the advantages of light weight, high temperature resistance, high strength, low cost and excellent thermal stability and erosion resistance.

The invention relates to a modified chrome corundum ramming material and a preparation and construction process thereof, and belongs to the technical field of chrome corundum ramming materials. The ramming material comprises a material A, a material B and a material C, wherein the material A comprises chrome corundum aggregate, titanium dioxide coated aluminum oxide microspheres, calcium sulfide dehydrate and silicon carbide porous microspheres; the material B comprises chromium oxide-zirconium oxide composite nano powder, sodium thiosulfate pentahydrate, tricalcium phosphate and hexagonal boron nitride flaky crystals; and the material C comprises an aluminum dihydrogen phosphate-magnesium hydroxide compound, a calcium fluoride-aluminum oxide co-melt and a silane coupling agent. The preparation process comprises the steps of pretreatment of all the components, preparation of composite powder and layered preparation. The construction process comprises the steps of pretreatment, wet-process mixing, layered ramming, negative-pressure permeation, medium-temperature reaction, spraying curing, integral firing and the like. Generation of hexavalent chromium can be effectively inhibited, the thermal shock resistance, the mechanical strength and the heat-conducting property of the material are remarkably improved, and the material has the advantages of being good in environment friendliness, long in service life, excellent in construction performance and the like.

The invention discloses a dust treatment device for emery production, and relates to the technical field of emery production, the dust treatment device comprises a dust absorption mechanism and a dust absorption pipe mounted on one side of the dust absorption mechanism, a dust treatment mechanism is arranged on one side of the dust absorption mechanism, and a filter box is arranged on one side of the dust treatment mechanism; the dust absorbing mechanism comprises a dust absorbing sleeve, a first rotating shaft is arranged in the center of the interior of the dust absorbing sleeve, a dispersing rotating disc is fixedly installed on one side of the first rotating shaft and rotationally connected with the dust absorbing sleeve, and a plurality of dispersing spiral plates are fixedly installed on the outer side of the first rotating shaft; due to the fact that a certain amount of water is contained in the anti-static spray, the preliminary dust falling effect can be achieved, meanwhile, the anti-static effect can be achieved, and the phenomenon that due to the fact that the concentration of sucked dust is too high, dust suction pipes are mostly made of metal materials, certain electrostatic sparks are generated and make contact with aluminum oxide dust, and then explosion is generated is avoided.

A method for producing a pyrochlore-type oxide including, in the composition, a plurality of cations including an alkali metal cation, the method comprising: a mixing step (S10, S20) for mixing a plurality of raw materials each containing a plurality of cations; and a heating step (S11, S21) for heating the mixture containing the plurality of raw materials at a prescribed temperature by using a liquid phase method to generate a composite oxide including, in the composition, at least an alkali metal cation and having a corundum structure.

The present invention relates to the technical field of refractory materials, and specifically discloses a lightweight and high-strength refractory ceramic material and a preparation method thereof, comprising 30%-40% lightweight filler (expanded perlite or glass microspheres), 20%-30% corundum or mullite, 10%-15% silicon carbide, 10%-20% high bauxite and 1%-5% dispersant, an oven is used to dry the lightweight filler, a ball mill is used to crush the corundum or mullite and silicon carbide, and a vibrating screen is used to screen them. The present invention ensures that the final ceramic material has the advantages of light weight, high strength, good thermal shock resistance, excellent thermal insulation, high temperature resistance, corrosion resistance, etc., is suitable for structural materials or thermal insulation materials in high temperature environments, and the precise control of humidity, temperature and molding pressure during the preparation process improves the uniformity and performance stability of the material, ensuring an efficient production process.

The invention discloses chromium-free and carbon-free complex-phase corundum stuffing sand for smelting variety steel and a preparation method of the chromium-free and carbon-free complex-phase corundum stuffing sand. The stuffing sand is prepared from the following raw materials in parts by mass: 60 to 90 parts of complex phase corundum subjected to silica sol dipping and coating treatment, 5 to 30 parts of zircon sand, 0.5 to 10 parts of sintering aid, 0.5 to 2 parts of silica sol and 1.5 to 5 parts of aluminum-silicon modifier. The preparation method comprises the following steps: uniformly mixing the multiphase corundum subjected to silica sol dipping and coating treatment, the zircon sand and the sintering aid, adding the silica sol, uniformly mixing, adding the aluminum-silicon modifier, uniformly mixing, drying at 150-250 DEG C, removing false particles, and screening to obtain the stuffing sand. The ladle filler sand is suitable for smelting of special varieties of steel, a compact isolation layer can be rapidly formed on the hot surface of a nozzle part of a refined steel ladle, permeation and erosion of molten steel / slag are effectively prevented, the self-casting rate of the refined steel ladle of the variety of steel with high added value is increased, oxygen burning casting is reduced, continuous casting broken casting is reduced, efficient and smooth continuous casting production is guaranteed, and the quality of a steel casting blank is improved.

The invention relates to the field of furnace lining materials, in particular to a rapid repairing material for a tapping hole and a furnace lining of an intermediate frequency furnace. The rapid repairing material comprises the following components in parts by weight: 50-70 parts of tabular corundum, 10-20 parts of fused magnesite, 8-15 parts of alumina micro powder, 3-8 parts of nano zirconia, 5-12 parts of silicon carbide, 10-15 parts of silica sol and 2-5 parts of a reinforcing agent. Wherein the reinforcing agent is titanium calcium aluminate coated with chromium nickel boride. The tabular corundum is mainly used as an integral framework; the fused magnesite is matched with the alumina micro powder to form magnesium aluminate spinel with a high melting point; the nano zirconium oxide can fill pores and is excellent in toughness; the silicon carbide has the advantages of high hardness, high thermal conductivity and high melting point; the reinforcing agent is titanium calcium aluminate coated with chromium nickel boride, although the adding amount is small, the high-temperature strength, toughness and thermal shock resistance of the repairing material can be remarkably improved, and especially the long-term corrosion resistance can be remarkably improved.

The invention relates to the technical field of tail gas treatment, and discloses a tail gas dust removal device for white corundum production, which comprises a shell, a gas inlet pipe is arranged at the bottom of the shell, a gas outlet pipe is arranged at the top of the shell, a control valve is arranged on the gas inlet pipe, a stirring mechanism is arranged in the shell, and the stirring mechanism comprises a driving motor and a rotating rod. A plurality of annularly-distributed extending pipe bodies are movably installed at the bottom of the rotating rod, water outlet holes are formed in the side faces of the extending pipe bodies, and a second partition plate is installed in the shell. Through the reasonably-designed through hole, the partition cover and the spraying system, tail gas can be fully contacted and treated when entering a cleaning solution and water mist area, and the tail gas can be fully treated; dust, impurities and water in the tail gas can be rapidly removed, the tail gas purification effect is effectively improved, and the tail gas emission requirement in the white corundum production process is met.

The invention relates to the field of refractory materials, in particular to a dry ramming mass for an intermediate frequency furnace and a preparation method thereof.The dry ramming mass is prepared from, by weight, 45-55 parts of fused corundum, 8-12 parts of fused magnesia, 15-20 parts of tabular corundum, 3-5 parts of fused spinel, 3-4 parts of activated aluminum oxide, 1-2 parts of silicon carbide, 1-2 parts of silica sol and 0.5-1 part of boric acid. 3.5-4.5 parts of a binding agent and 3-5 parts of an anti-penetrating agent; wherein the anti-penetrating agent is chromium oxide coated nickel aluminate microspheres. The invention solves the two major problems of easy penetration and thermal shock peeling of the traditional furnace lining, is especially suitable for harsh smelting environments of high manganese steel, stainless steel and the like, and has long service life and convenience in construction.

The invention discloses a special low-carbon fire-resistant quartziferous dry vibration material and a preparation method thereof, and relates to the technical field of fire-resistant materials. The special low-carbon fireproof quartzite dry vibration material comprises the following components in parts by weight: 70-80 parts of quartz aggregate, 20-30 parts of zirconia coated corundum micro powder, 3-6 parts of aluminum dihydrogen phosphate, 0.5-1 part of lithium borate and 0.5-1 part of yttrium oxide. The preparation method comprises the following steps: adding the quartz aggregate, the zirconia coated corundum micro powder, the dihydrogen phosphate, the lithium borate and the yttrium oxide into a mixer, and uniformly stirring to obtain the product. The quartziferous dry vibration material prepared by the invention has good thermal shock cycle resistance and low carbon content, and is green and environment-friendly.

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 compact anti-cracking fused zirconia corundum brick and a preparation method thereof, and belongs to the technical field of refractory materials, the compact anti-cracking fused zirconia corundum brick comprises the following raw materials by mass fraction: 42.7-46.6% of alumina, 36.8-40.5% of zirconium dioxide, 11.5-14.2% of silicon dioxide, 2.5-4.4% of niobium pentoxide, 0.7-1.1% of soda ash, 0.6-1% of manganese dioxide and 0.5-1% of copper oxide, the preparation method comprises the following steps: mixing and melting the raw materials, introducing oxygen to remove carbon, casting and molding molten feed liquid, and annealing and cooling. The fused zirconia corundum brick has excellent compactness and crack resistance, and the service life of the fused zirconia corundum brick is greatly prolonged.

The invention discloses a submerged nozzle lining material for rare earth steel continuous casting and a preparation method thereof, and relates to the field of refractory materials. The high-strength wear-resistant ceramic material comprises the following components in percentage by weight: 40-65 wt% of fused white corundum, 8-20 wt% of quartz, 15-25 wt% of crystalline flake graphite, 1-2 wt% of metal silicon powder, 2-4 wt% of ferro-silicon nitride powder, 0.5-1 wt% of boron carbide powder and 8-12 wt% of thermosetting phenolic resin. The method has the beneficial effects that the raw materials are processed through the processes of mixing, drying and the like to prepare the pug, the pug is used for manufacturing the submersed nozzle lining, the submersed nozzle using the lining is used for rare earth steel pouring, the nodulation problem of an inner hole of the nozzle is remarkably relieved, the content of inclusions in molten steel is reduced, the quality of steel billets is improved, and meanwhile the production cost is reduced. And the service life of the submersed nozzle is prolonged, so that the submersed nozzle is more suitable for production of rare earth steel protective pouring.

The invention relates to a preparation method and application of an oxidation-resistant MXene material with a defect ordered hexagonal hole structure, and the preparation method comprises the following steps: mixing MAX phase Ti3AlC2 with hexagonal holes, CuCl2 and NaCl, loading into an alumina corundum square, covering with a NaCl salt bed boat, putting into a muffle furnace, and carrying out constant-temperature sintering at 820 DEG C in an air atmosphere for 3 hours; the method has the advantages that the process is simple and reasonable, a barrier for resisting attacks of oxygen molecules and water molecules is effectively constructed under the combined action of trace metal oxides on the surface of the MXene material, and the oxidation resistance of the MXene material is remarkably improved.

The application belongs to the technical field of refractory materials, and particularly relates to a corundum castable special for a circulating fluidized bed boiler and a preparation method thereof. The raw materials of the castable include 20-50 parts of white corundum particles with a size of 3-5 mm, 5-10 parts of alpha-alumina micropowder, 2-5 parts of microsilica, 1-5 parts of a binder, 0.5-1 part of a water reducing agent, and 1-5 parts of SiC-ZrB2 / chitosan quaternary ammonium salt modified graphene composite material. The castable has the properties of low apparent porosity, good mechanical properties, strong corrosion resistance and the like.

The invention relates to the technical field of brick materials, in particular to an alumina-magnesia-carbon brick material composition and a preparation method thereof, and the alumina-magnesia-carbon brick material composition comprises the following raw materials in parts by weight: 40-45 parts of corundum with the particle size of 2-3mm, 8-14 parts of magnesia, 5-7 parts of alumina, 4-6 parts of graphite, 3-5 parts of phenolic resin, 4-7 parts of an additive blended with a modified filler, and 3-5 parts of an auxiliary agent. According to the alumina-magnesia-carbon brick material composition disclosed by the invention, corundum is matched with magnesia, alumina and graphite as raw materials, phenolic resin is added as a bonding auxiliary agent, and an additive and an auxiliary agent which are blended by modified filler are blended and coordinated to achieve a synergistic effect together; the obtained alumina-magnesia-carbon brick material composition product has excellent apparent porosity, coordinated improvement of oxidation resistance and pressure resistance, and remarkable cold and heat resistance, wear resistance and service life.

The invention relates to a low-sodium low-silicon fused zirconia corundum brick and a preparation method thereof, and relates to the technical field of refractory materials. The low-sodium low-silicon electric smelting zirconium corundum brick is prepared from the following raw material oxides in percentage by weight: 30 to 45 percent of ZrO2, 9.0 to 12 percent of SiO2, 0.1 to 1.0 percent of Cr2O3, 0.9 to 1.6 percent of Na2O + K2O + CaO, 0.3 to 2.0 percent of mixed rare earth oxide and the balance of Al2O3 and inevitable impurities. By introducing a proper amount of Cr2O3 and mixed rare earth oxide and controlling the composition of a glass phase, the number of baddeleyite-corundum eutectic and the viscosity of the glass phase are improved, the erosion resistance and resistivity of the zirconia corundum brick are further improved, the safe service life of a glass kiln is prolonged, meanwhile, the performance of a glass product is also improved, and the application prospect is wide. And defects on the glass surface are reduced.

The invention discloses an H2 and CO erosion resistant Al2O3-Cr2O3 refractory material for a hydrogen-based shaft furnace and a preparation method of the H2 and CO erosion resistant Al2O3-Cr2O3 refractory material. The H2 and CO erosion resistant Al2O3-Cr2O3 refractory material comprises the following raw materials in parts by weight: 30-40 parts of chrome corundum particles with the particle size of 4-1mm; 10-15 parts of aluminum chromium slag particles with the particle size of 1-0 mm; 10-20 parts of fused brown aluminum oxide particles with the particle size of 3-1 mm; 20-30 parts of fused white corundum powder with the particle size of less than 0.074 mm; 5-10 parts of alumina micro powder with a particle size of less than 6 [mu] m; 3-5 parts of chromium oxide green with a particle size of less than 0.074 mm; 3-4 parts of phosphoric acid; and 3-10 parts of erbium oxide. The invention has good H2 and CO gas erosion resistance, slag corrosion resistance and stable high-temperature performance, and is convenient for construction and use, so that the overall service life of the hydrogen-based shaft furnace is prolonged.

A structure for prolonging the service life of a soaking sheet sand blasting tool relates to the technical field of sand blasting tool structures and comprises a sand blasting tool, a plurality of supporting holes are distributed in the upper surface of the sand blasting tool in a rhombus shape, a protective glue layer is arranged on the upper surface of the sand blasting tool, and positioning holes for avoiding the supporting holes are formed in the protective glue layer. According to the utility model, the problems that the surface of a tool is damaged in the sand blasting process due to the fact that carborundum is used during the sand blasting operation of the soaking sheet in the prior art, and the service life of the sand blasting tool is very short and the product cost is increased due to the impact of the carborundum on the surface of the tool are solved.

The present invention discloses an electroslag remelting method for reducing vanadium burnout. The vanadium content of the consumable electrode is controlled to be above the upper limit of the target composition of the electroslag blank, and is controlled to exceed the target composition upper limit by 5% to 10%. The surface-treated consumable electrode is coated with, from the inside out, an aluminum powder layer and / or a vanadium monoxide powder layer, and a corundum powder layer. During the electroslag remelting stage, electroslag is added to the crystallizer, and the average thickness of the slag pool is controlled to be 1 / 3 to 1 / 2 of the equivalent diameter of the consumable electrode being melted. At the same time, inert gas is blown into the crystallizer at a flow rate of 5 to 20 L / min. During the feeding stage, electroslag is again added to the crystallizer, and the thickness of the slag pool is controlled to be 1 / 2 to 1.0 of the equivalent diameter of the consumable electrode being melted. The inert gas flow rate is controlled at 10 to 30 L / min. By spraying the surface of the consumable electrode, the present invention effectively prevents secondary oxidation of the vanadium element in the consumable electrode during the electroslag remelting process, thereby reducing vanadium burnout and solving the problem of poor control stability of the burnout rate of the easily oxidized element vanadium.

The invention relates to the technical field of abrasive material production, in particular to a corundum abrasive material feeding device and a using method, the corundum abrasive material feeding device comprises a conveying auger for feeding materials into production equipment, and a transfer cylinder is arranged at the top of the conveying auger. According to the corundum abrasive feeding device and the using method, a material block is brought to the upper position through the rotating cage body and then falls off to be smashed, the extrusion rod slides in a reciprocating mode along the sliding groove in the rotating process through gravity, so that the extrusion rod is used for crushing the material block along the connecting rod, and compared with an existing mode that materials are treated in a multi-section mode through structures such as a stirring rod and a centrifugal disc, the efficiency is improved. The cage body structure of the connecting rod can drive material blocks to fall, collide and disperse, a centrifugal part rotating at a high speed is not needed to throw the material blocks, strong vibration and noise generated by equipment operation and material block collision are reduced, low-speed equipment operation safety is better, meanwhile, movement of the extrusion rod is achieved through cooperation of position changes and gravity instead of active driving, and the material blocks are not prone to falling. And the scattering component can be prevented from being blocked when the material blocks are not broken.

The invention provides a wear-resistant and anti-slip ceramic tile and a preparation method thereof, the wear-resistant and anti-slip ceramic tile has a matte transparent wear-resistant cover glaze layer and an anti-slip dry granular glaze layer sprayed on the matte transparent wear-resistant cover glaze layer in an electrostatic spraying manner, and the matte transparent wear-resistant cover glaze layer comprises the following raw materials in percentage by weight: 1-10% of a wear-resistant dry granular glaze layer; comprising 1-5 parts of burnt zinc oxide, 10-20 parts of potassium feldspar, 3-8 parts of calcite, 2-6 parts of superfine corundum powder, 30-45 parts of high-aluminum-calcium frit, 10-20 parts of high-barium frit, 5-10 parts of kaolin, 7-15 parts of superfine quartz powder, 3-8 parts of high-silicon-aluminum frit and 3-8 parts of boron frit. The glaze is high in transparency and does not affect color development of ink; a silica tetrahedron and a boron-oxygen tetrahedron which are stable in structure are formed on the glaze surface, so that the Mohs hardness of the ceramic tile is high, the wear-resistant grade is high, and the wear mass is small; anti-skid dry granular glaze is applied in an electrostatic spraying mode, flatness is high, cleaning is easy, dirt is not hidden, and dual wear resistance is achieved.

The utility model discloses a chrome corundum material sintering device, which relates to the technical field of chrome corundum and comprises a base, a lifting mechanism is arranged at the top of the base, a sintering furnace is arranged on one side of the lifting mechanism, a feed port is arranged on the surface of the top of the sintering furnace, and a discharge port is arranged on the surface of the bottom of the sintering furnace. According to the chrome corundum material sintering device, materials are located on the overturning plate, the overturning plate and the lifting plate can move upwards through the motor, the materials can move upwards at the same time, one end of the overturning plate makes contact with the collecting plate, the materials can move upwards automatically, and then through rotation of the rolling wheels, the materials can be collected. The angle of the overturning plate is rotated through rotation of the rolling wheels, materials on the overturning plate move and can move on the collecting plate, then the materials can enter the sintering furnace through the feeding port, and therefore feeding work can be automatically completed without manual approaching to the sintering furnace, and discomfort of the temperature to the human body is reduced.

A preparation method and application of a defect-ordered hexagonal pore structure antioxidant MXene material, comprising mixing hexagonal pore MAX phase Ti3AlC2 with CuCl2 and NaCl, loading into alumina corundum squares, and covering with a NaCl salt bed boat, placing the mixture in a muffle furnace, and sintering at a constant temperature of 820°C for 3 hours in an air atmosphere; after washing to remove impurities, the mixture is filtered, vacuum dried, and ground to obtain a defect-ordered hexagonal pore structure antioxidant. The advantages are: a simple and reasonable process, and under the joint action of trace amounts of metal oxides on the surface of the MXene material, an effective barrier against attacks by oxygen and water molecules is constructed, significantly improving the antioxidant properties of the MXene material.

The application relates to a bauxite-based corundum mullite hollow sphere with a gradient structure and a preparation method thereof, and belongs to the field of heat-insulating refractory materials. The preparation method comprises the following steps: firstly, high-alumina bauxite is beneficiated and classified and homogenized, then, according to a certain mass percentage, III-grade high-alumina bauxite, silica, mixed additives and an organic binder are uniformly mixed and granulated; taking spherical particles as cores, II-grade high-alumina bauxite and I-grade high-alumina bauxite are sequentially wrapped under the rotation of a granulator to obtain a non-homogeneous spherical particle blank body with a SiO2-rich interior; and finally, the corundum mullite hollow sphere with the gradient structure is obtained through high-temperature calcination. The refractory hollow sphere is designed with the gradient structure through the combined process of high-alumina bauxite classification and homogenization, coating forming and high-temperature calcination in-situ pore forming, the phase performance characteristics of corundum and mullite are fully utilized, and the refractory hollow sphere with the low thermal conductivity, the good corrosion resistance, the high use temperature and the excellent thermal shock resistance is developed.

The invention relates to the technical field of hazardous waste treatment, in particular to a method for extracting rare earth elements from gasification furnace slag and preparing foam microcrystalline glass from the gasification furnace slag and fly ash. The method comprises the following steps: mixing the gasification furnace slag with small molecular organic acid, uniformly stirring, and controlling the pH value to be 3-5; filtering, and respectively collecting solid residues and leachate; adding oxalate into the leachate in batches to separate rare earth elements, and filtering to obtain the rare earth elements and waste liquid; the method comprises the following steps: mixing organic incineration fly ash and solid residues, grinding, heating in a corundum crucible, and preserving heat to obtain a basic glass melt; carrying out water quenching or room temperature cooling on the basic glass melt to obtain glass slag, and drying to constant weight; glass slag is added into the waste liquid, a certain amount of calcium carbonate is added for mixing, injection molding and curing are conducted, and then demolding is conducted to obtain a foaming blank; and drying and sintering the foamed blank to obtain the foam microcrystalline glass. According to the method, hazardous waste materials are completely utilized, the preparation process is simple, and the waste utilization rate is high.

The invention discloses a ladle nozzle plug cock and a using method thereof. The ladle nozzle plug cock is composed of a solid counterweight material and a corundum spinel layer wrapping the solid counterweight material. Four symmetrically-distributed arc-shaped grooves are formed in the side surface of the steel ladle plug stopper, the depth of the grooves is larger than or equal to 80 mm, and the four grooves penetrate through the upper surface and the lower surface of the steel ladle plug stopper; the diameter of the upper surface of the steel ladle plug cock is 350 + / -2mm, the diameter of the lower surface of the steel ladle plug cock is 170 + / -2mm, and the vertical height of the upper surface and the lower surface is 230 + / -2mm; the average density of the material formed by combining the solid counterweight material and the outer wrapping material wrapping the solid counterweight material is 3.6-4.0 g / cm < 3 >. Under the condition that molten steel circulation is not blocked, single vortexes are divided through the grooves in the four sides, meanwhile, the molten steel vortex speed is reduced, finally, the through height of the vortexes is reduced, the steel ladle slag entrapment time is delayed, and the metal yield is increased.

The invention belongs to the field of materials, and particularly discloses a high-toughness wear-resistant material and a preparation method and application thereof.The high-toughness wear-resistant material is prepared from 50 wt%-70 wt% of corundum, 20 wt%-40 wt% of mullite, 5 wt%-10 wt% of nanometer silicon carbide micro powder, 3 wt%-5 wt% of zirconium oxide, 2 wt%-5 wt% of nanometer titanium carbide micro powder, 1 wt%-3 wt% of rare earth oxide and 1 wt%-3 wt% of silicon oxide micro powder; the high-temperature strength and the thermal shock resistance are both considered through corundum-mullite combination, the wear resistance and the anti-scouring performance of the material are remarkably improved through introduction of the nano silicon carbide micro powder and the nano titanium carbide micro powder, the overall toughness of the material is improved through zirconium oxide, the material is made to adapt to mechanical shock at the high temperature, and the service life of the material is prolonged. Through the synergistic effect of the rare earth oxide and the silicon oxide micro powder, a stable protective film is formed at a high temperature, and the acid gas erosion resistance of the material is remarkably improved.

The invention provides a square quartz substrate double-face grinding method and system and a process production line, and belongs to the technical field of quartz substrate machining. The method comprises the steps that a square quartz substrate workpiece subjected to profiling contour grinding is loaded in a grinding jig of a double-face grinding machine, thickness change dynamic parameters of the square quartz substrate workpiece are collected in real time, and a grinding pressure value is adjusted based on the thickness change dynamic parameters; the method comprises the following steps: mixing artificial carborundum and nanoscale alumina particles according to a mixing ratio of 5-50%, and preparing a multi-stage particle size grinding fluid with the particle size of W5-W28; the rotating speed of the double-sided grinding machine in the coarse grinding stage is set to be 8 r / min-30 r / min, and the rotating speed of the double-sided grinding machine in the fine grinding stage is set to be 8 r / min-25 r / min; and the actual removal amount of the workpiece in the grinding process is obtained, and the grinding time is dynamically adjusted based on the actual removal amount of the workpiece. And the machining efficiency, the thickness uniformity and the surface quality can be improved, so that efficient and precise double-sided grinding of the square quartz substrate is realized.

The invention discloses a flat wear-resistant jade ceramic tile and a preparation method thereof, and belongs to the technical field of ceramic production processes. The flat wear-resistant jade ceramic tile comprises a green body, ground glaze, low-temperature jade glaze, a pattern decoration layer and transparent wear-resistant polished glaze, according to the invention, the composition ratio of the low-temperature jade glaze formula is adjusted and optimized, the pattern and the zirconium white ink are printed on the low-temperature jade glaze layer, and the pattern and the zirconium white ink are fused and reacted with the low-temperature glaze layer, so that an illustrated jade texture is formed. Meanwhile, the purpose of improving the wear resistance of the glaze surface is achieved by adjusting and optimizing the formula of the transparent wear-resistant polishing glaze and introducing superfine corundum micro powder, wollastonite and the like. In addition, by combining optimization and adjustment of firing and polishing processes, a pure and flat glaze surface effect is achieved. The wear resistance and texture of the ceramic tile are remarkably improved, and the problems of stick marks and water ripples puzzling a glazed product for a long time are effectively solved, so that the product quality is remarkably improved, and the market competitiveness of the product is enhanced.