2518 results about "Refractory" patented technology

The invention discloses a low-carbon magnesia-carbon refractory material for clean steel smelting and a preparation method thereof, and relates to the technical field of magnesia-carbon refractory materials. The low-carbon magnesia-carbon refractory material comprises the following components: 40-50 wt% of fused magnesite with the particle size of 3-5 mm, 20-30 wt% of fused magnesite with the particle size of 1-3 mm, 10-20 wt% of fused magnesite with the particle size of less than or equal to 74 [mu] m, 8-12 wt% of silicon powder, 1-3 wt% of alumina powder and 3-5 wt% of crystalline flake graphite. 2-4 wt% of a composite additive and 4-6 wt% of phenolic resin are added; the composite additive comprises andalusite and mullite. The material has excellent mechanical properties, thermal shock resistance, oxidation resistance and erosion resistance; the preparation method has the characteristics of low cost and simple process, and the prepared low-carbon magnesia carbon refractory material has excellent oxidation resistance, thermal shock resistance and slag resistance by exerting the phase volume expansion effect and intergranular phase enhancement effect of the multiphase ceramic; the used graphite is low in content, graphite consumption and molten steel recarburization risk can be reduced, and the method is suitable for smelting clean steel.

The present invention relates to the technical field of refractory materials, and in particular to a magnesium spinel hot wet gunning material, a preparation method and an application thereof. The magnesium spinel hot wet gunning material comprises: 45 wt%~60 wt% of magnesium spinel brick waste; 20 wt%~25 wt% of magnesia sand; 15 wt%~20 wt% of spinel; 5 wt%~10 wt% of α-alumina micropowder; 5 wt%~10 wt% of binder; 1 wt%~2 wt% of aluminum powder; 0.1 wt%~0.2 wt% of water reducer; 1 wt%~3 wt% of saturated polyaluminum chloride solution; the sum of the amounts of the components is 100%. The magnesium spinel hot wet gunning material has the advantages of good high-temperature mechanical strength, long service life and low production cost during use through the combination of various components, and is not easy to generate dust.

The utility model provides drying treatment equipment for producing refractory materials, which comprises a drying machine, a control panel and a box door, the control panel is fixedly arranged on one side of the drying machine, the box door is hinged with one side of the drying machine through a hinge, and a placing plate is arranged in the drying machine. The utility model relates to the technical field of refractory materials. According to the drying treatment equipment for producing the refractory material, by arranging the transmission mechanism, the granular refractory material can be placed on the placement plate, a reciprocating screw rod is driven to rotate by starting a motor while the granular refractory material is dried by a dryer, and a moving block is driven while the reciprocating screw rod rotates; and the movable block reciprocates along the tracks of the sliding block and the sliding groove, the movable block can drive the linkage plate and the poke rod to reciprocate, the poke rod makes contact with the refractory materials, the stacked refractory materials can be dispersed, and therefore the effect of preventing the refractory materials from being stacked is achieved.

The invention relates to the technical field of explosion-proof control boxes, in particular to a multipurpose explosion-proof control box which comprises a box body and a box door, an electrical cavity is formed in the box body, an access hole communicated with the electrical cavity is formed in the front end face of the box body, and the box door is installed on the access hole; a pressure relief opening communicated with the electric cavity is formed in the upper end face of the box body, the coaming is installed on the pressure relief opening of the box body in a surrounding mode, the buffer bag is cylindrical and is made of flexible sealing refractory materials, the lower end of the buffer bag is connected with the inner wall of the coaming in a sealed mode, and the buffer bag is folded and stored in the coaming. The upper end of the buffer bag is connected with the lower end face of the top cover, and the top cover covers the upper port of the coaming; explosion pressure is guided and absorbed by increasing the effective volume, smoke is collected, and safety is improved.

The invention provides titanium-containing anhydrous stemming for a blast furnace and a preparation method of the titanium-containing anhydrous stemming, and belongs to the technical field of refractory materials for the blast furnace. The titanium-containing anhydrous stemming for the blast furnace comprises the following raw materials: 40-60 parts of titanium corundum, 5-15 parts of silicon carbide, 10-20 parts of ferro-silicon nitride fine powder, 5-15 parts of titanium dioxide fine powder, 5-15 parts of vanadium-titanium slag fine powder, 5-10 parts of coke fine powder, 1-5 parts of monatomic silicon fine powder, 1-5 parts of ball clay micro powder, 1-5 parts of aluminum nitrate micro powder and 1-2 parts of magnesium alon micro powder. Gas-phase substances of Si (g), Al (g) and Mg (g) can be formed in the stemming at high temperature by the monatomic silicon fine powder and the MgAlON micro powder in the raw materials and react with CO and N2 in the environment to generate ceramic whiskers such as SiC, Si3N4, AlN and MgAl2O4, and the generated ceramic whiskers are distributed in a staggered manner and are filled in pores of the stemming, so that the high-temperature strength and the volume stability of the stemming are remarkably improved.

The invention relates to the technical field of refractory materials, in particular to a waste magnesia-calcium brick-containing refractory material and a preparation method thereof, and the waste magnesia-calcium brick-containing refractory material comprises the following components: composite aggregate, calcium aluminate cement, urea resin-aluminum dihydrogen phosphate, active alpha-Al2O3 micro powder, silica micro powder and sodium tripolyphosphate. In the room-temperature spraying maintenance and low-temperature working stage, hydration of free CaO in the waste magnesia-calcium bricks and erosion of OH <-> are prevented through the hydrophobic effect of fluorinated polyphosphazene and modified zirconium oxide sol, and the compatibility and wettability of the composite aggregate and cement paste are improved through carboxylic acid groups of carboxyethyl silanetriol and polyethylene glycol monomethyl ether. According to the present invention, with the temperature rising, the aluminum dihydrogen phosphate forms the viscous liquid phase to wrap the aggregate so as to provide the temporary protection, the temperature continues to rise, the zirconium oxide and the nanometer Al2O3 react with the CaO and the MgO to generate the CaZrO3 and the MgAl2O3, the aluminum dihydrogen phosphate reacts with the nanometer Al2O3 in the system to generate the AlPO4, and the CaZrO3, the MgAl2O3 and the AlPO4 form the multi-phase fire-resistant structure so as to further improve the fire resistance of the fire-resistant material;

The invention relates to the technical field of refractory materials, in particular to a magnesium-calcium-zirconium-carbon brick production method which comprises the following components in parts by weight: 60-80 parts of sintered magnesium-calcium-zirconium sand particles, 10-30 parts of fused magnesia particles, 2-4 parts of zirconium oxide, 0.5-3 parts of silicon carbide fine powder, 2-6 parts of nano yttrium oxide high-dispersion particles, 1-2 parts of C9 petroleum resin powder, 2-7 parts of graphite, 4-6 parts of binding agent and 0.3-0.5 part of urotropin. The rare earth material nano yttrium oxide high-dispersion particles are introduced, the magnesium-calcium-zirconium-carbon brick has the advantages of high temperature resistance, good hydration resistance, good thermal shock resistance, good oxidation resistance and good erosion resistance, the magnesium-calcium-zirconium-carbon brick is dried by an electric drying kiln as an unburned brick, a tunnel kiln firing process is omitted, the labor cost and energy consumption are reduced, and the production cost is reduced. And the emission of greenhouse gas and toxic and harmful gas generated by fuel combustion is avoided, and the biomass fuel is an environment-friendly product.

The invention belongs to the technical field of zirconium oxide refractory parts, and particularly relates to a densified anti-permeation zirconium oxide refractory part and a manufacturing method thereof. According to the scheme, raw materials with specific components and dosage are selected and subjected to the steps of pretreatment, mixing, filling forming, sintering, aftertreatment and the like. Through gradient structure design, grain boundary regulation and control and surface defect repair, the prepared zirconia refractory part has high volume density (larger than or equal to 5.76 g / cm), low apparent porosity (smaller than or equal to 0.36%), high bending strength (larger than or equal to 535 MPa) and excellent molten glass permeability resistance (the erosion depth is smaller than or equal to 0.2 mm). Wherein the gradient structure reduces the interface stress and inhibits ZrO phase change, the rare earth oxide is added to form a high-viscosity glass phase to block the diffusion path of erosion ions, the molten salt impregnation process improves the compactness and durability of the material, and the requirement of the modern industry for the high-performance refractory material is met.

The utility model provides refractory material inspection equipment convenient to collect damaged test boards, and relates to the technical field of inspection equipment.The refractory material inspection equipment comprises a workbench, a supporting column is fixedly installed at the bottom end of the workbench, a sliding groove is formed in the surface of the workbench, and a storage box is slidably connected into the sliding groove; a pull block is fixedly installed on the surface of the storage box, a better use effect is achieved, during inspection, a clamping plate corresponds to an upper clamping groove and is pushed inwards, when the clamping plate drives a soft cushion to completely slide into the workbench through the clamping groove, then a lifting part is pinched and lifted upwards, a cover plate rotates upwards at the top end of a fixing plate through a hinge A, and the cover plate is clamped through a clamping groove. When the cover plate is completely opened, damaged workpieces can be placed in the collecting box in the process, so that the situations that the inspection work is affected by waste plates easily in the using process and workers need to secondarily collect the waste plates after the inspection work is finished due to the fact that existing inspection equipment is not provided with a waste plate collecting structure are avoided.

The utility model relates to the technical field of coating, in particular to a refractory material particle coating device which comprises a processing box, a coating chamber is installed in the processing box, a receiving and sending opening is formed in one side of the coating chamber, a coating groove is formed in each of the two sides of the coating chamber, an isolation chamber is formed in the processing box, and a coating groove is formed in the isolation chamber. A first electric telescopic rod is installed in the isolation chamber, a lower clamp is installed at the output end of the first electric telescopic rod, an upper clamp is installed at the top end in the coating chamber, the two sides of the interior of the processing box are each provided with a mounting groove, and the interiors of the two mounting grooves are each provided with a lead screw; the outer sides of the two lead screws are each sleeved with a sliding plate, and two second electric telescopic rods are installed on one side of each sliding plate. The two sides of the material can be coated with adhesives at the same time, the coating speed is increased, and the production efficiency is improved.

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 relates to the technical field of refractory materials, in particular to a refractory composite material for a roller support and a preparation method of the refractory composite material. The material comprises the following components: high-crystallinity co-polypropylene, a phosphorus-nitrogen-silicon ternary synergistic flame retardant, an expanded graphite-manganese series interlayer compound, mesoporous aluminum hydroxide, a ternary magnesium-aluminum-silicon layered composite material, temperature-responsive core-shell structure cerium oxide nanoparticles and the like. Through a multi-synergistic flame-retardant mechanism and a multi-scale structural design, excellent flame-retardant performance, mechanical performance and thermal stability are achieved, the material is particularly suitable for a roller support in a high-temperature industrial environment, and the problem that a traditional material is prone to failure in the high-temperature environment is solved.

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

The invention discloses a refractory material processing raw material quantitative proportioning device, and relates to the technical field of refractory material production, the refractory material processing raw material quantitative proportioning device comprises a workbench and a reaction kettle, the left side and the right side of the workbench are respectively provided with a liquid storage box and a powder box, and the reaction kettle is internally provided with a stirring mechanism for mixing processing raw materials; by arranging the discharging assembly and the liquid conveying assembly to intermittently add mixed liquid and powder, when a node between two groups of outer stirring blades is in a rectangular state, the inner part of the reaction kettle is divided into an outer ring area and an inner ring area by the outer stirring blades at the moment; the intermittently added liquid and powder can be preliminarily pretreated with part of the raw materials in the outer ring area, then the outer stirring blades rotate to push the preliminarily pretreated mixed raw materials into the inner ring area to be secondarily mixed and stirred, the liquid is easier to permeate in a small amount of aggregate, the powder can be completely wrapped, and the stirring efficiency is improved. Therefore, the problems of powder agglomeration and liquid distribution are solved, and the overall quality of the refractory material is effectively improved.

The invention discloses a corundum high-strength wear-resistant castable, which belongs to the field of castable, and comprises a raw material, an auxiliary material, a binding agent and an additive, the raw material is corundum aggregate, and the auxiliary material comprises corundum fine powder, mullite fine powder, an inorganic non-metallic material and stainless steel fiber, the binding agent comprises calcium aluminate cement, hydrated alumina, silica sol, aluminum dihydrogen phosphate and refractory clay, and the additives comprise sintered spinel fine powder, silica micropowder, activated alumina micropowder, zirconia micropowder, a coagulant, a retarder, a dispersant, a flocculant, a plasticizer, a water-retaining agent, an anti-settling agent and a preservative. The corundum high-strength wear-resistant castable is prepared by mixing the raw materials, the auxiliary materials, the binding agent and the additive, so that the corundum high-strength wear-resistant castable has excellent strength, wear resistance, fire resistance and thermal shock resistance during use, and further the actual use effect and performance of the corundum high-strength wear-resistant castable are ensured; and the service life of the product is prolonged.

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 an environment-friendly tundish magnesium-calcium dry material for thin-strip cast-rolling short-process steelmaking, and belongs to the technical field of refractory materials. The invention discloses an environment-friendly tundish magnesium-calcium dry material for thin-strip cast-rolling short-process steelmaking. The tundish magnesium-calcium dry material is prepared from the following raw materials in percentage by mass: 44-62.5% of magnesia aggregate, 22.5-24% of dolomite aggregate, 11-28% of magnesia fine powder and 3-5% of a binding agent, the binding agent is silica sol modified by a phosphate esterification aluminic acid ester coupling agent. The preparation method comprises the following specific steps: putting magnesia fine powder, a binding agent, magnesia aggregate and dolomite aggregate into a V-shaped mixing mill, uniformly stirring for 5 minutes, putting the stirred mixture into a mold, ramming, vibrating and molding to obtain a molded green body, curing at room temperature for 24 hours, demolding, drying at 200 DEG C for 24 hours, and carrying out heat treatment in an air atmosphere to obtain a dry material sample. According to the invention, the binding agent with good compatibility with a matrix is prepared by improving the binding agent, so that the binding agent can play a reinforcing role.

The invention discloses jaw crushing equipment for refractory material raw material processing, which belongs to the field of jaw crushers, and is characterized in that an upper crankshaft, a lower crankshaft, a reinforcing piston and an impact part are arranged on a fixed jaw plate mechanism by simulating the principle of an impact drill, so that the upper crankshaft and the lower crankshaft can be driven to rotate when a belt pulley I rotates; the reinforcing piston is promoted to reciprocate in the piston stroke channel, the impact pile section of the impact piece at the corresponding position in the piston stroke channel is continuously impacted in a reciprocating mode, the impact piece is driven to continuously reciprocate on the fixed jaw plate body, and finally the end of the impact rod continuously impacts the interior of a crushing cavity of the jaw crusher box body; and materials in the middle section position in the crushing cavity are impacted, and the crushing efficiency of the materials is improved.

The invention discloses an anti-erosion Al2O3-SiC-C slag runner castable containing pyrophyllite and a preparation method of the anti-erosion Al2O3-SiC-C slag runner castable, and belongs to the technical field of refractory materials. The Al2O3-SiC-C slag trough castable is mainly prepared from the following raw materials in percentage by mass: 30 to 45 percent of high-alumina clinker, 20 to 35 percent of pyrophyllite, 8 to 15 percent of silicon carbide, 5 to 10 percent of kyanite, 5 to 10 percent of graphite electrode powder, 3 to 6 percent of active Al2O3 micro powder, 2 to 4 percent of silicon micro powder, 1.5 to 2.5 percent of antioxidant, 3 to 5 percent of pure calcium aluminate cement and 1.5 to 2.5 percent of asphalt. In addition, explosion-proof fibers accounting for 0.03-0.15% of the total weight of all the raw materials and a water reducing agent accounting for 0.05-0.15% of the total weight of all the raw materials are added. The anti-erosion Al2O3-SiC-C slag runner castable is prepared by mixing the weighed raw materials uniformly and then obtaining the anti-erosion Al2O3-SiC-C slag runner castable. The Al2O3-SiC-C slag runner castable prepared by the method can completely meet the requirements of the use performance of the Al2O3-SiC-C slag runner castable, and the Al2O3-SiC-C slag runner castable can be well applied to a blast furnace casting house; meanwhile, the cost is reduced, and remarkable social benefits and economic benefits are achieved.

The invention relates to the technical field of refractory materials, in particular to an antioxidant and application thereof in steel ladle slag line bricks, and the antioxidant comprises a Si / SiC multiphase material, modified nano Al2O3 and CaF2; the ladle slag line brick comprises an antioxidant, fused magnesite, crystalline flake graphite and phenolic resin. Si-SiC compound waste is subjected to magnetic separation and acid pickling, then a SiO2 passivation layer is formed through pre-oxidation, moisture and air in the storage period are isolated, and a titanate coupling agent is introduced to improve the wettability and compatibility with phenolic resin. P2O5 released by phosphate on the surface of the modified nano Al2O3 at a high temperature reacts with alkali (earth) metal migrated to a SiO2 oxide layer to prevent the alkali (earth) metal from forming a low-melting-point eutectic substance, CaF2 reacts with SiO2 along with temperature rise, a passivation layer is broken, internal Si and SiC are directly exposed, and boron oxide of the modified nano Al2O3 remarkably reduces activation energy and a temperature threshold value of the reaction of CaF2 and SiO2.

The invention provides an anti-erosion refractory material for calcination of an aluminum ash rotary kiln and a preparation method of the anti-erosion refractory material, and relates to the technical field of refractory materials. Comprising the following raw materials in percentage by mass: 20%-70% of flint clay with the particle size of 0-5mm, 5%-40% of synthetic mullite with the particle size of 0-5mm, 5%-20% of synthetic mullite powder with the particle size of 0-0.074 mm, 1%-20% of silica powder with the particle size of 0-0.074 mm, 1%-15% of synthetic material powder with the particle size of 0-0.074 mm and 1%-15% of clay with the particle size of 0-0.074 mm. According to the anti-erosion refractory material for calcination of the aluminum ash rotary kiln and the preparation method thereof, a high-viscosity glass phase is generated in situ, and a dynamic protection layer is formed on the surface of the refractory material to prevent permeation of harmful gas, so that the thickness of a metamorphic layer is reduced, damage to a refractory product is slowed down, and the service life is prolonged; through the synergistic effect of the silica powder and the synthetic powder, the refractory material can be sintered at a low temperature, and the production energy consumption is reduced.

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

The invention relates to the technical field of glass, in particular to an alkali-free aluminoborosilicate glass composite clarifying agent and a clarifying method thereof. The alkali-free aluminoborosilicate glass composite clarifying agent is prepared from the following raw materials in percentage by mass on the basis of the total mass of alkali-free aluminoborosilicate glass: 0.4 to 5.5 percent of halogen alkaline earth metal salt, 0.03 to 0.4 percent of lanthanum oxide, 0.01 to 0.4 percent of tin dioxide and 0.01 to 0.3 percent of cerium dioxide. The alkali-free aluminoborosilicate glass composite clarifying agent is applied to alkali-free aluminoborosilicate glass, and the problems that the alkali-free aluminoborosilicate glass is poor in clarifying effect and has many bubble defects are solved; the corrosion of high-temperature molten glass to refractory materials at parts such as a tank furnace and the like is reduced, so that the number of stone defects of the refractory materials in the glass is reduced, and the service life of the refractory materials of the furnace is prolonged.

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 relates to the field of refractory material production, and discloses an intelligent control system in a refractory material production process, which comprises a batching module, the batching module receives the proportion of a refractory material formula and puts materials into a transmission module, the batching module is connected with the transmission module, and the transmission module receives the put refractory material and transmits the refractory material to the control module. A conveying module is connected to the conveying module, a conveyor or a conveying spiral auger is used for conveying and feeding the thrown refractory materials, the conveying module is connected with a machining production module, the machining production module receives raw materials conveyed by the conveying module, and machining equipment is used for machining and producing the raw materials. The material supplementing module accurately calculates a compensation value by using a specific formula according to a calculation result of the transportation loss dynamic prediction module, and sends an adding instruction, so that the batching module supplements the loss material in time, it is ensured that the material amount actually participating in proportioning meets the standard, and the proportioning precision is maintained.

The invention provides a refractory material conveying and feeding system, and mainly relates to the field of refractory material conveying for refractory product production. A refractory material conveying and feeding system comprises a temporary storage bin, an elevator and a feeding device, a weighing bin and a weighing platform are arranged below the tail end of the elevator, a feeding device is arranged at the tail end of the feeding device and comprises a feeding frame, a feeding arm and a feeding bin, a supporting frame is arranged at the top of the feeding bin, and a guide cylinder is vertically arranged in the center of the supporting frame; a guide rod is slidably arranged in the guide cylinder, and a guide die is arranged at the bottom of the guide rod. The device has the beneficial effects that the layout that the middle is low and the periphery is high can be completed in the link that refractory materials are conveyed into the lower forming die, the production efficiency of the large refractory bricks is improved, the forming density of the edges of the large refractory bricks is improved, and the defective rate of the refractory bricks which are high due to edge breakage is reduced.

The present invention belongs to the technical field of refractory materials, and particularly relates to a cover brick for an electrofused zirconium corundum brick furnace and a preparation method thereof. Based on the total mass fraction of 100 parts of high-purity dense tabular corundum powder, alumina granulated powder and high-purity calcium aluminate cement, it is composed of the following raw materials in parts by weight: corundum powder with a particle size of 10 mm < particle size ≤ 20 mm, 10 - 20 parts, corundum powder with a particle size of 6 mm < particle size ≤ 10 mm, 10 - 20 parts, corundum powder with a particle size of 3 mm < particle size ≤ 6 mm, 5 - 15 parts, corundum powder with a particle size of 1 mm < particle size ≤ 3 mm, 10 - 26 parts, corundum powder with a particle size of 0.1 mm < particle size ≤ 1 mm, 16 - 28 parts, corundum powder with a particle size of 2000 mesh < particle size ≤ 325 mesh, 5 - 10 parts; alumina granulated powder, 5 - 15 parts; high-purity calcium aluminate cement, 3 - 10 parts; water reducing agent, 1 part. The present invention has good alkali erosion resistance, high strength, good heat shock resistance, long service life, large spalling size and little pollution to the product.

The invention discloses a feeding device for refractory material production and a feeding process of the feeding device, and relates to the technical field of feeding. The device comprises a base, a wireless module is arranged at the center of the top of the base, two supporting columns are arranged on the left side of the top of the base, a driving assembly is arranged on the edge of the right side of the top of the base, two electric hydraulic columns are fixedly installed at the four corners of the top of the base, sliding blocks are hinged to the tops of the telescopic ends of the two electric hydraulic columns, and U-shaped baffles are hinged to the tops of the supporting columns; the right side of the bottom of the U-shaped baffle is slidably installed on the top of the sliding block, a motor is arranged on the left side of the front face of the U-shaped baffle, and two rotating rods are rotatably installed in the U-shaped baffle and symmetrically distributed with the U-shaped baffle as the axis. The U-shaped baffle is promoted to achieve various height adjustment through the telescopic U-shaped baffle at the telescopic end of the electric hydraulic column, height adjustment does not need to be conducted after the conveying belt stops running, the continuity of the feeding process is guaranteed, and the conveying efficiency of refractory materials is improved.

The utility model relates to the technical field of refractory materials, in particular to automatic refractory material mixing equipment which comprises a machine body, a supporting ring is fixedly connected to the bottom of the surface of the machine body, a quantitative dosing mechanism is fixedly connected to the rear side of the top of a main frame, and discharging anti-blocking mechanisms are fixedly connected to the two sides of the bottom of the surface of the machine body. Through cooperation of the bottom angle plate, the pressure sensor, the agent barrel, the top frame and the liquid pump, the quantitative agent adding function is achieved, the liquid pump is started through the controller firstly, the liquid pump operates to extract needed agents from the agent barrel and inject the needed agents into the machine body, the pressure sensor can monitor the reduced weight in the extraction process, and when a set value is reached, the liquid pump is started; when the fire-proof material is mixed, the controller is informed and the liquid pump is closed, and the mechanism can accurately and effectively inject chemicals every time, so that the fault condition that the chemicals are added too much or too little easily due to manual chemical adding is prevented, and the influence on subsequent normal mixing of the fire-proof material is avoided.

The invention discloses a high-oxygen steel submerged nozzle as well as a preparation method and a use method thereof. A nozzle body comprises the following components: 31%-35% of C, 49%-54% of Al2O3 and 13%-16% of SiO2; the composite layer comprises the following components in percentage by weight: 26%-30% of MgO and 70%-74% of Al2O3; a coating is attached to the surface of the composite layer and comprises the following components: more than or equal to 99% of MgO; and the slag line part is made of a zirconium carbon material. The preparation method of the water gap comprises the steps of burdening, mixing, forming and firing. The obtained submersed nozzle product is preheated and cast-on for use, continuous casting of 1600-2000 tons of molten steel can be achieved for steel with the oxygen activity controlled to be 1.5 * 10 <-4 >-3.0 * 10 <-4 >, the inner surface of the refractory material is good, the situation that small pieces of the refractory material enter the molten steel after being eroded to form inclusions is avoided, meanwhile, the situation that after the submersed nozzle is eroded, the structural size in the nozzle changes can be prevented, and the service life of the submersed nozzle is prolonged. And therefore, the quality of the continuous casting billet is ensured.