802 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 container for manufacturing an oxide powder including lithium, the surface of the inner walls of which is at least partially covered with a coating having the following crystalline phases, as a percentage based on the total weight of the crystalline phases: MgAl2O4 spinel: more than 25% and up to 60%, and crystalline phases other than MgAl2O4 spinel and corundum: <10%, and corundum: supplemented to 100%.

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 invention relates to a chromium-zirconium-corundum refractory material, a preparation method thereof and a chromium-zirconium-corundum brick. The chromium zirconium corundum refractory material comprises the following raw materials in parts by mass: synthetic chromium corundum powder, fused zirconium mullite powder, first chromium oxide powder, first alumina powder and a first binding agent; the synthetic chromium corundum powder comprises the following raw materials in parts by mass: second chromium oxide powder, second aluminum oxide powder and a second binding agent; the synthetic chrome corundum powder comprises first synthetic chrome corundum powder, second synthetic chrome corundum powder, third synthetic chrome corundum powder and fourth synthetic chrome corundum powder; the electric smelting zirconium mullite powder comprises first electric smelting zirconium mullite powder and second electric smelting zirconium mullite powder; the mass fraction of Cr2O3 in the chromium zirconium corundum refractory material is 30%-35%. The chromium zirconium corundum refractory material provided by the invention has the advantages of high porosity, high high-temperature structural strength, low high-temperature creep rate, strong chemical erosion resistance and good thermal shock resistance.

The invention discloses a preparation method of a high-purity corundum crucible for high-temperature alloy smelting, belongs to the technical field of precision casting refractory material forming preparation, and aims to solve the problems that an Al2O3 crucible is easily eroded by high-temperature alloy, impurities are generated during high-temperature alloy smelting, and the Al2O3 crucible is difficult to be suitable for high-temperature alloy smelting. According to the technical key points, 60%-70% by mass of aluminum oxide Al2O3 powder and 30%-40% by mass of silicon oxide SiO2 powder are added into a ball milling tank to be subjected to ball milling treatment, the aluminum oxide Al2O3 powder comprises fine powder mixed powder with the particle size being 5-50 micrometers, medium powder mixed powder with the particle size being 50-300 micrometers and coarse powder mixed powder with the particle size being 0.4-0.5 mm, and the coarse powder mixed powder is mixed with the medium powder mixed powder with the particle size being 2-5 micrometers. A binder polyvinyl alcohol (PVA) solution is added into the mixed powder for granulation operation, after the mixed material is aged, the mixed material is pressed in a cold isostatic pressing mode, a crucible preformed blank is obtained and sintered at different temperatures after being dried, and the crucible is obtained. The method has the effect that the sintered high-purity corundum crucible has excellent high temperature resistance and thermal stability at the same time.

The invention relates to the technical field of power radio frequency discrete devices, in particular to an SBD device and a preparation method thereof. The method comprises the following steps: providing a first substrate; forming a bonding middle layer with a corundum type crystal structure on the upper surface of the first substrate; providing a beta-Ga2O3 layer, wherein the beta-Ga2O3 layer is provided with a first surface and a second surface; carrying out ion implantation on the second surface of the beta-Ga2O3 layer; a beta-Ga2O3 layer is transferred to the bonding intermediate layer, so that the second surface of the beta-Ga2O3 layer is in contact with the upper surface of the bonding intermediate layer, and a heterogeneous integrated substrate is formed; forming an epitaxial layer on the upper surface of the heterogeneous integrated substrate; a partially-covered field plate passivation layer is formed on the upper surface of the epitaxial layer, the field plate passivation layer sequentially comprises a buffer layer and a passivation layer from bottom to top, and the field plate structure can effectively suppress a strong electric field at the edge of a device electrode. The SBD device provided by the invention has relatively high device performance and reliability.

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 belongs to the field of advanced structure ceramic preparation, and particularly relates to a load-bearing type high-temperature bedplate and a manufacturing method thereof. The preparation method of the load-bearing type high-temperature bedplate comprises the following steps: (1) sequentially paving the outer layer material, the inner layer material and the outer layer material into a mold, and carrying out high-pressure forming to obtain a formed blank; (2) drying the formed blank to obtain a dry blank; and (3) firing the dry blank at the temperature of 1550-1680 DEG C to obtain the bedplate. The preparation method comprises the following steps: by taking low-zirconium corundum, white corundum, fused mullite and andalusite as raw materials, introducing zirconite and tabular corundum fine powder, and respectively preparing an outer layer material and an inner layer material; the high-strength wear-resistant bedplate with a low-zirconia corundum outer layer and a staggered structure in which zirconia corundum crystals are filled in gaps of a mullite network is formed through pressure forming and sintering, has good high-temperature strength and excellent thermal shock resistance, can bear constantly changing impact of high-low temperature circulation of a pushed slab kiln, and has long service life.

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 invention discloses a dark golden velvet texture ceramic rock plate, base glaze and a preparation method of the dark golden velvet texture ceramic rock plate, the dark golden velvet texture ceramic rock plate is prepared from golden velvet base glaze materials, water, carboxymethyl cellulose and sodium tripolyphosphate according to the mass ratio of 100: 36: (0.1-0.2): (0.3-0.5) through mixing and ball milling; the gold velvet base glaze is prepared from the following components in parts by weight: 3-8 parts of wollastonite, 5-10 parts of dolomite, 10-15 parts of strontium carbonate, 2-5 parts of calcined talc, 30-40 parts of potassium feldspar, 5-10 parts of nepheline, 5-10 parts of calcined kaolin, 5-15 parts of quartz, 1-5 parts of white corundum, 3-8 parts of calcined zinc oxide and 10-15 parts of matte transparent frit; the matte transparent frit comprises the following components in percentage by mass: 55%-60% of SiO2, 12%-15% of AL2O3, 2%-3% of K2O, 3%-4% of Na2O and 20%-25% of CaO, and the burning vector of the matte transparent frit is 1%-5%. According to the scheme, the light transmittance of a glaze layer is improved, the transparency is improved, meanwhile, the surface gloss can be kept to be uniformly dispersed and is not clear, and the glaze touch feeling is soft like velvet.

The invention relates to the technical field of fused alumina zirconia bricks, in particular to a fused alumina zirconia refractory brick and a preparation technology.The fused alumina zirconia refractory brick is prepared from, by weight, 55-65 parts of alumina powder, 25-35 parts of zircon sand, 1-5 parts of modified nanometer alumina powder, 2-6 parts of binder, 1-2 parts of chromic oxide, 1-3 parts of yttrium oxide and 1-4 parts of fluxing agent. Through in-situ growth of a layer of carbon nanotube core-shell structure on the surface of nano-alumina, the core-shell structure can prevent direct contact between nano-alumina particles, so that the possibility of nano-alumina agglomeration is reduced, and nano-alumina is uniformly distributed in the corundum amorphous refractory brick. A finer dispersed phase is formed in the brick body, so that the expansion of cracks is hindered, and the toughness and the strength of the brick body are 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 ZTA ceramic material as well as a preparation method and application thereof, and the ZTA ceramic material comprises the following powder raw materials in percentage by mass: 5wt%-69wt% of zirconium oxide, 5wt%-21wt% of tabular corundum, 3wt%-5wt% of inorganic oxide and 21wt%-79wt% of aluminum oxide. In the ZTA ceramic material provided by the invention, the use of the inorganic oxide not only can inhibit the excessive growth of crystal grains, but also can facilitate the escape of gas from the interiors of the crystal grains and reduce the sintering component degree, thereby meeting the high-strength requirement of the photovoltaic field on the ceramic material.

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 utility model discloses environment-friendly fused white corundum dust collecting equipment, and relates to the technical field of white corundum. The dust collection device comprises a collection bin body and further comprises a dust collection assembly fixed to the upper end face of the collection bin body, a rotating assembly fixed to the upper end face of the collection bin body, an adjusting vertical plate fixed over the rotating assembly, and an adjusting assembly arranged in the adjusting vertical plate. The conical driving gear can be driven to rotate by rotating the rotating handle, then the conical driving gear can drive the threaded rod to synchronously rotate along with the conical driven gear, then the lifting bin body can be driven to move up and down in the linear direction of the sliding groove body, and the extraction pipe can be driven to move up and down under the limitation of the limiting clamp. The height of the extraction pipe can be adjusted, meanwhile, the extraction pipe can rotate along with the sliding block in the linear direction of the annular sliding rail, the suction direction of the extraction pipe can be rotationally adjusted, the adaptability of equipment is improved, and use is more convenient.

The invention discloses a high-strength thermal shock resistant brick and a preparation method thereof. The high-strength thermal-shock-resistant brick is mainly composed of fused zirconia corundum with the particle size of 5-3 mm, fused zirconia corundum with the particle size of 3-1 mm, fused zirconia corundum with the particle size of 1-0 mm, fused zirconia mullite with the particle size of 3-1 mm, fused zirconia mullite with the particle size of 1-0 mm, fused zirconia mullite with the particle size smaller than or equal to 0.088 mm and fused chromic oxide with the particle size of 325 meshes. In addition, nano aluminum nitride powder and a binding agent are added. The preparation method comprises the following steps: firstly, carrying out dry mixing on granules, adding a binding agent into the obtained dry mixed material, stirring, carrying out wet grinding on the wet granular mixed material obtained after stirring, adding various powder materials in the wet grinding process, carrying out mixed grinding, and carrying out pressure forming on semi-dry plastic pug obtained after mixed grinding to obtain a green brick; and sequentially drying and firing the obtained brick blank to obtain the high-strength thermal-shock-resistant brick. The high-strength thermal shock resistant brick prepared by the invention not only has relatively high compressive strength, but also has excellent thermal shock resistance and erosion resistance, and can effectively prolong the service life when being applied to a colored intermittent smelting furnace and a discharge port.

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.

The invention discloses transparent glaze and a preparation method thereof as well as a ceramic tile and a preparation method thereof, and relates to the technical field of ceramics. In the chemical composition of the transparent glaze, the mass ratio of SiO2 to Al2O3 is (3.1-4.2): 1, and the transparent glaze contains 95 wt%-97 wt% of a glass phase and 3 wt%-5 wt% of a corundum crystal phase. According to the transparent glaze, 95 wt%-97 wt% of a glass phase and 3 wt%-5 wt% of a corundum crystal phase are formed by adjusting the content and the proportion of aluminum oxide and silicon oxide, the glass phase can enable the transparent glaze to have high transparency and enable dark ceramic tile patterns and textures to be fully displayed, and the corundum crystal phase can enable the transparent glaze to have good abrasion resistance. The requirement of the brick surface on wear resistance is met.

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.