333results about How to "Good thermal shock resistance" patented technology

An epoxy mortar material for a bridge expansion joint structure and a construction method thereof are provided. The epoxy mortar material includes a liquid A, a liquid B and a filler, wherein diamines D2000 and D230 are mixed to act as the epoxy resin curing agent. The curing agent has low viscosity, good compatibility with epoxy resin, long usable life, high bonding strength, and good flexible and heat shock resistance, so that it is suitable for the epoxy mortar material capable of absorbing the stress. Furthermore, the silicone adhesive is made into the sealing waterstop band, so that the present invention has good water resistant performance; the color of the expansion joint structure is the same as that of the adjacent concrete or asphalt, so that the bridge has beautiful appearance; the expansion joint structure has no tremors while vehicles passing through, noise generated by vehicle driving is lower.

The invention discloses a zirconium oxide sandwich composite calcining-endure plate. The zirconium oxide sandwich composite calcining-endure plate comprises a matrix mullite calcining-endure plate and zirconium oxide paint. The matrix mullite calcining-endure plate comprises the following raw materials in percentage by mass: 20 to 25 percent of andalusite with thickness degree between 1 and 1.5 mm, 5 to 10 percent of andalusite with thickness degree between 0.5 and 1 mm, 5 to 8 percent of andalusite with thickness degree less than 0.5 mm, 10 to 15 percent of plate-shaped corundum with thickness degree between 0.5 and 1 mm, 5 to 10 percent of plate-shaped corundum with thickness degree less than 0.5 mm, 5 to 10 percent of electrical melting mullite with thickness degree between 0.5 and 1 mm, 8 to 12 percent of sillimanite powder, 15 to 20 percent of alpha-aluminium oxide (Al2O3) powder, 2 to 3 percent of silica micropowder, 3 to 4 percent of clay and 3 to 4 percent of binding agent. The zirconium oxide paint comprises the following raw materials in percentage by mass: 75 to 80 percent of zirconium oxide with granularity less than or equal to 600 meshes and 20 to 25 percent of silicasol. In addition, the invention also provides a process for preparing the zirconium oxide sandwich composite calcining-endure plate. The zirconium oxide sandwich composite calcining-endure plate has the advantages of high-temperature resistance, high mechanical strength, stable chemical properties, high stability of thermal shock resistance, long service life and high anti-stripping property.

The invention discloses a yellow phosphorus preparation method and yellow phosphorus preparation equipment, which produce no phosphorous slurry and reduce the dust content of tail gas. The yellow phosphorus preparation method comprises the technological processes of electric furnace smelting, furnace gas purifying and phosphorus collecting and refining. In the process of furnace gas purifying, the furnace gas discharged out from an electric furnace is guided into a furnace gas dust-collection system through a smoke discharge pipeline, the furnace gas dust-collection system at least comprises a filter for filtering the furnace gas, the filter is provided with a sintering inorganic porous material filter element meeting the following working conditions, and the operations executed on the filter comprise the operation executed during starting a machine, the operation executed during normal operation, the operation executed during back flowing and the operation executed during stopping the machine; in the operation executed during starting the machine, pre-heated inertia gas is injected into the filter so as to preheat the sintering inorganic porous material filter element in the filter to the temperature of more than 187.5 DEG C, and in the operation executed during the normal operation, the to-be-filtered furnace gas of which the temperature is kept at 420-590 DEG C is input into the filter and the dust content of the filtered clean furnace gas is lower than 10-20 mg/m<3>.

The invention relates to a carbon-containing fireproof material with excellent oxidation resistance and high intensity. The fireproof material comprises an aluminum-carbon fireproof material, a magnesium-carbon fireproof material and a zirconium-carbon fireproof material. The fireproof material is mainly applied to an inner lining of a smelting furnace, a molten metal flow guiding pipe or a flow controller during metallurgy and casting. During preparation of the carbon-containing fireproof material, polycarbosilane is used as a bonding agent, and a cracking reaction is performed during a sintering process to generate silicon carbide fibers and to form a silicon carbide bonded component. The silicon carbide bonded component has better oxidation resistance than a resin carbon bonded component and has a quite high bonding strength with fireproof aggregates; in addition, bonded carbon formed after the silicon carbide fibers and phenolic resin are carbonized has similar thermal conductivity and thermal expansion coefficients, so the silicon carbide bonded carbon-containing fireproof material has thermal shock resistance equivalent to the thermal shock resistance of a resin carbon bonded carbon-containing fireproof material. The polycarbosilane is a polymer which can be pyrolyzed to obtain the silicon carbide and comprises a main chain or branched chains mainly containing Si and C, and the amount of the added polycarbosilane is 8-12 percent of the weight of raw materials.

The invention discloses a corundum breathable seat brick with high thermal shock resistance. The brick consists of mixed corundum, a magnesium-containing material, a binding agent, chromium oxide, a water reducing agent and an explosion-proof agent. The production method of the corundum breathable seat brick comprises the following steps: dosing, and mixing to prepare mud; placing the mud in a mould, performing shake densification, demoulding, and drying to obtain a breathable seat green brick; and heating the breathable seat green brick, and roasting to obtain the corundum breathable seat brick with thermal shock resistance. The component ratio is reasonable, the production and preparation method is simple, the prepared breathable seat brick has good high-temperature strength and thermal shock resistance; and the service life of the breathable seat brick can be effectively prolonged, the use security of the breathable brick can be increased, the replacement times of the breathable brick can be reduced, the production cost of enterprises can be reduced and the production efficiency of ferrous metallurgy can be increased. The corundum breathable seat brick can replace the existing breathable seat brick and be suitable for industrial production.

The invention discloses a high-strength steel fibre castable which is prepared by the following raw materials in parts by weight: 2.5 parts of bauxite material with the granularity of 8-5mm, 2.3 parts of bauxite material of which the granularity is more than 0.075mm and is less than 5mm, 2 parts of brown aluminium oxide particle material with the granularity of 3-1mm, 0.8 part of bauxite material of which the granularity is less than or equal to 0.075 mm, 0.4 part of alumina submicron powder of which the granularity is less than or equal to 0.025 mm, 0.6 part of carborundum powder of which the granularity is less than or equal to 0.075 mm, 0.3 part of silica micropowder of which the granularity is less than 0.019 mm, 0.6 part of CA-70 cement, 0.5 part of brown aluminium oxide powder of which the granularity is less than 0.053 mm, 0.2 part of No. 446 heat-resistant steel fiber, 0.02 part of anti-explosion steel fiber, sodium tripolyphosphate accounting for 0.1% of total material weight and sodium hexametaphosphate accounting for 0.08% of total material weight. The product has high compression strength, high breaking strength, high refractoriness under load and favorable thermal shock resistance stability, has the characteristic of microdilatancy at high temperature and has the advantages of favorable wear-resisting property and the like.

The invention relates to a fireproof spraying coating for a steel ladle working lining. The fireproof spraying coating is prepared from the following raw materials in parts by weight: 20-50 parts of sintered bauxite clinker, 10-20 parts of fused magnesite, 8-20 parts of fused magnesia-alumina spinel, 5-12 parts of fused white corundum, 5-10 parts of active alumina micropowder, 3-10 parts of andalusite, 3-7 parts of silicon dioxide micropowder, 2-5 parts of a sintering agent, 0.1-0.2 part of externally added explosion-proof fibre, and 0.1-0.3 part of an externally added compound water-reducing agent. The fireproof spraying coating disclosed by the invention is simple in preparation method and simple and convenient to construct; rapid construction maintenance and rapid use of the steel ladle working lining can be realized; because of being compounded by adopting a carbon-free material, the fireproof spraying coating is environment friendly and free from pollution; therefore, molten steel can be purified effectively; the characteristics of high-temperature molten steel to the steel ladle working lining, such as washing resistance, slag corrosion resistance, thermal shock resistance and product comprehensive benefits, can be sufficiently improved; and the service life of the steel ladle working lining can be increased and prolonged effectively.

The invention discloses a preparation method of an in-situ generated mullite whisker ceramic material. According to the preparation method, coal gangue and high bauxite are used as raw materials, polycrystal mullite fibers are added and used as seed crystals, chlorine trifluoride is added and used as a whisker growth catalyst, and generation of mullite whiskers in the sintering process is promoted; the crystal structure of acidized potassium feldspar is damaged, the liquid-phase formation temperature of a ceramic blank system is lowered, fusion of substances in ceramic blank is promoted, formation and growth of mullite crystals are promoted, the aim of lowering the ceramic sintering temperature is achieved, and energy consumption is lowered; through gel injection molding and two-segment high-temperature sintering, in-situ generated mullite whiskers develop completely, a three-dimensional network structure is formed in the ceramic material, the ceramic material has high porosity, a gelinjection molding technology is adopted at the same time, the pore distribution state of final ceramic can be adjusted and controlled, and the light heat insulation performance of the ceramic materialis improved.

The invention relates to a bottom bonding material used in preservative treatment of a chimney and a flue. The bottom bonding material is modified silicon rubber (M50), and surface modified polytetrafluoroethylene (DS1) of a surface preservative material is bonded to the inner walls of the chimney and the flue; the modified silicon rubber (M50) is formed by modifying room-temperature vulcanized silicon rubber through nano SiOx and TiO2 additives, and the weight ratio of the room-temperature vulcanized silicon rubber to the nano SiOx to the TiO2 is 100:2-6:1-3; and x in the nano SiOx is 1.2 to 1.6. The bottom bonding material can provide effective bonding for DS1 (surface modified polytetrafluoroethylene board) with temperature resistance and strong corrosion resistance in the preservative treatment of the chimney and the flue so that an integral preservative layer has good temperature resistance, strong adhesive force, super-strong acid resistance, good thermal shock resistance, good weather resistance, strong permeability resistance, strong pollution resistance and good scouring resistance.

The invention discloses a yellow phosphorus production method and equipment which do not produce mud phosphorus and can reduce the dust content in tail gas. The method comprises the technology links as follows: 1, electric furnace smelting; 2, furnace gas purification, furnace gas discharged from an electric furnace is guided into a furnace gas dust collecting system through an exhaust pipeline, the furnace gas dust collecting system comprises at least a filter used for filtering the furnace gas, the filter is provided with a sintering inorganic porous material filter element capable of meeting following work conditions, and the operation performed according to the filter comprises the steps as follows: 1), the operation executed during driving: inert preheating gas is injected into the filter, and the sintering inorganic porous material filter element in the filter is heated to 187.5 DEG C or above; 2), the operation executed during normal operation: to-be-filtered furnace gas with the temperature maintained to be 187.5-280 DEG C is input into the filter, and the dust content in the filtered clean furnace gas is below 10-20 mg/m <3>; and 3), the operation executed during reverse blowing and 4) the operation executed during parking; and 3, phosphorus collecting and refining.

There is disclosed a honeycomb structure body having joining material layers of a stress relaxing function and joining strength equivalent to those of joining material layers of a conventional honeycomb structure body, and having an excellent heat shock resistance. A honeycomb structure body includes a plurality of honeycomb segments and joining material layers having a plurality of pores and joining the plurality of honeycomb segments in a state where the honeycomb segments are arranged adjacent to each other so that side surfaces of the honeycomb segments face each other. A ratio of the number of pores having a value of 1.2 or less which is obtained by dividing a maximum diameter of each of the pores by a minimum diameter of the each of the pores is 60% or more of the number of all the pores of each of the joining material layers.