38results about How to "Small deformation at high temperature" patented technology

The invention discloses a process for calcining petroleum coke. The calcination of the petroleum coke is carried out in a tank type calcining furnace, and the tank body of the tank type calcining furnace is provided with a preheating zone and 6-8 calcining zones sequentially from top to bottom, wherein the calcining temperature of the first calcining zone at the uppermost part is controlled in the maximum calcining temperature interval allowed by the petroleum coke; the calcining temperature of the second calcining zone in the downstream position of the first calcining zone is kept in the maximum calcining temperature interval and is not higher than the calcining temperature of the first calcining zone; starting from the third calcining zone, the calcining temperature of each calcining zone gradually reduces relative to the calcining temperature of the adjacent calcining zone in the upstream position; and in the undermost calcining zone, the calcining temperature is reduced to the discharging temperature. In the invention, when the petroleum coke is calcined, the high temperature zone is positioned at the top end of the calcining furnace, thereby relieving the high temperature deformation phenomenon of the furnace body, being more favorable for overflow of combustible gas in the petroleum coke, reducing the corrosion of the combustible gas on wall bricks, and being favorable for prolonging the service life of the tank type furnace.

The invention relates to a crystalline silicon ingot furnace thermal field structure with a two-stage thermal insulation cage. The thermal insulation cage has a two-stage structure, and consists of an upper thermal insulation cage fixed on the top of the furnace and a lower thermal insulation cage fixed on a lifting device at the bottom of the furnace; the upper thermal insulation cage is an inverted bucket, and consists of a top insulation board and an upper insulation cylinder of which the lower edge is provided with an L-shaped inner-turned upper insulation ring, wherein the top insulation board and the upper insulation cylinder are connected with each other into a whole and the inner surface of the top insulation board is provided with a concave arc reflector; the lower thermal insulation cage is an upright bucket, consists of a bottom insulation board and a lower insulation cylinder of which the upper edge is provided with an L-shaped inner-turned lower insulation ring, and is fixed on the lifting device controlled externally at the bottom of the furnace, wherein the bottom insulation board and the lower insulation cylinder are connected with each other into a whole; and the upper and lower insulating rings separate the inner cavity of the thermal insulation cage into an upper high-temperature area and a lower high-temperature area. The thermal field required by the production of the crystalline silicon is realized by adjusting the lift opening of the lower insulation cage through the lifting device; and the structure has the advantages that: the structure is simple and reasonable and obviously saves energy, the established thermal field has high stability and repeatability, the temperature is difficultly interfered by air disturbance and the structure has high practicability.

The invention discloses modified engineering plastic for manufacturing a 5G communication filter and a preparation method of the modified engineering plastic. The modified engineering plastic comprises the following components in parts by weight: 40-60 parts of base resin, 10-40 parts of glass fibers, 1-10 parts of a toughening agent, 0.1-1 part of a nucleating agent, 1-15 parts of fluorine-containing resin, 5-20 parts of a heat-conducting filler, 5-20 parts of filler, 0.1-2 parts of a coupling agent, 0.1-1 part of a lubricant and 0.2-1 part of an antioxidant; the base resin is polyphenylene sulfide resin or LCP resin; and the glass fibers comprise low-dielectric glass fibers with the dielectric constant of 4-7. The modified engineering plastic for manufacturing the 5G communication filterhas the characteristics of linear thermal expansion coefficient similar to that of aluminum alloy, low and stable dielectric constant, excellent heat resistance, heat dissipation performance, dimensional stability and the like, and the purpose of replacing a metal cavity can be achieved through plastic electroplating.

The invention discloses a yellow sintered landscape brick and a production method thereof. The yellow sintered landscape brick comprises 30 to 50 percent of fire clay and 50 to 70 percent of aggregate, wherein the sum of mass percent of all raw materials is not more than 100 percent. The production method comprises the steps of crushing, screening, blank mixing, blank preparation and roasting. According to the yellow landscape brick, aggregate is adopted as a main material, fire clay is adopted as an auxiliary material, and particularly hard fire clay and/or half-hard fire clay is adopted, so that the plasticity of the aggregate can be realized, and the blank is good in moldability; meanwhile, the raw materials are sintered at a high temperature of a specific range, the fire clay is thermally decomposed and toughened and covers and is bonded to the aggregate to present in faint yellow color and yellow color effects, so that the landscape brick has the characteristics of pure yellow color, relatively high pressure resistance and bending resistance and small deformation. The production method is pure in color, simple in process and stable in product quality.

The invention discloses a method for preparing high-temperature-resisting anti-crack precoated sand through composite resin, and belongs to the technical field of preparation of precoated sand. The method for preparing the high-temperature-resisting anti-crack precoated sand through the composite resin comprises the steps that quartz sand and waste ceramic are ground in a mixed mode, sieved and then mixed with pulp prepared from sticky rice and water, an obtained mixture is freeze-dried and sieved through wet ball-milling, and thus dry powder is obtained; afterwards, a formaldehyde solution reacts with phenol and oxalic acid, so that phenolic resin is obtained; the phenolic resin is dissolved in absolute ethyl alcohol, so that a phenolic resin-ethanol solution is obtained; and the dry powder, gypsum powder, simethicone and the like are poured into a sand mixer so as to be mixed, a urotropin solution and epoxy resin E-51 are added for a stirring reaction, the phenolic resin-ethanol solution and dibromotoluene glycidyl ether are added dropwise for a curing reaction, cooling is conducted till the room temperature is reached after curing, sand discharging is conducted, and thus the high-temperature-resisting anti-crack precoated sand is obtained. The precoated sand prepared through the method is good in curing effect and high in strength, has the excellent performance of low gas evolution and high temperature resistance, is good in material coordination and not prone to breakage when a casting is cast, and can meet production requirements of various complex precision castings.

The invention discloses a reinforcing rib for a long-service-life wire-drawing bushing for producing continuous basalt fibers. The reinforcing rib is shaped like an arch and comprises rib columns and an arc-shaped rib face of which the top protrudes upwards, and the rib columns are welded to the lower surface of the rib face; an arch hole is formed between every two adjacent rib columns. The invention further discloses the long-service-life wire-drawing bushing for producing the continuous basalt fibers. The bushing comprises a substrate, a side wall plate, a plug plate, electrode plates, reinforcing ribs and discharge spouts. Each reinforcing rib is shaped like an arch and comprises rib columns and an arc-shaped rib face of which the top protrudes upwards, and the rib columns are welded to the lower surfaces of the rib faces; an arch hole is formed between every two adjacent rib columns. By means of the reinforcing rib, the service life of the wire-drawing bushing is prolonged.

The invention provides a corrosion-resistant and heat-resistant quartz ceramic roller way production process. The production process comprises the following steps of 1) preparing slurry, 2) pressing,3) sintering, and 4) assembling. In the production process, a quartz ceramic roller is made of a specially-made quartz ceramic roller raw material; the prepared quartz ceramic roller is high in strength and good in corrosion resistance and heat resistance; the quartz ceramic roller is connected with a shaft sleeve by adopting a specially-made adhesive and the assembly is firm; the quartz ceramic roller way can be used as a horizontal conveying roller way in production lines of a horizontal toughening furnace, silicon steel heat treatment and the like, has the advantages of high density, high strength, small high-temperature deformation, smoothness, fineness, small radial runout and the like, and is widely applied to bearing and conveying glass in the horizontal toughening furnace.

The invention specifically relates to a preparation method for an internal-expansion nanoporous thermal-insulation material, belonging to the technical field of preparation of thermal-insulation materials. The preparation method of the invention comprises the following steps: preparing mixed clay from diatomite and bentonite, and mixing the mixed clay and a nanometer silica aerogel to prepare nanometer silica aerogel slurry; heating mixed slurry and the nanometer silica aerogel slurry to obtain molten material liquid; subjecting zirconium boride powder, a concentrate and the like to high-speeddispersion so as to obtain a nanometer reinforced emulsion; pouring the nanometer reinforced emulsion at first and then performing filling with a high-temperature-resistant inorganic filler; and carrying out pressure filtration and drying so as to obtain the internal-expansion nanoporous thermal-insulation material. According to the invention, expanded graphite has cooling effect on the inner layer of the thermal-insulation material and also plays reinforcing and protective roles; and a zirconium dioxide-silicon dioxide film formed by a reaction further improves the compressive strength of the thermal-insulation material at a high temperature, and has broad application prospects.

The invention discloses a shaft furnace cloth chute and a manufacture method thereof. The shaft furnace cloth chute consists of a casing and a lining layer, wherein the lining layer is made of tempering abrasion-resistant steel, and the casing is made of structural low-alloy steel or an austenite heat-resisting steel plate. The manufacture method of the shaft furnace cloth chute sequentially comprises the steps of surface washing, blank assembly, welding, heating, rolling, temperature control, thermal treatment, processing and forming and the like. The shaft furnace cloth chute can achieve compounding of the casing of the cloth chute and an internal abrasion-resistant layer in a rolling-combined mode and is large in connecting and contacting face and tight in combination.

The invention belongs to the technical field of glass lining glaze, and specifically discloses a one-time enameling and low-temperature firing glass lining glaze for oil field pipeline corrosion prevention, and a preparation method and applications thereof. The glass lining glaze is prepared from the following components in percentage by weight: 30 to 50% of SiO2, 5 to 20% of B2O3, 1-5% of Al2O3,2-5.5% of Li2O, 4 to 16.5% of K2O and Na2O; 1-6% of CaO, 1-1.5% of MnO2, 0.3 to 2% of CoO, 0.5 to 2% of NiO, 1 to 8% of CaF2, 1.2 to 7.5% of TiO2, 0.5 to 4% of ZrO2, 0.5 to 5% of ZnO, 0.5 to 5% of SnO2, 0 to 4% of MoO3, 0 to 3% of SrO, 0 to 2.5% of CeO2 and 0.5 to 8.5% of BaO. The highest firing temperature of the glass lining glaze is lower than 800 DEG C, an anticorrosive coating layer can be manufactured through one-time enameling, the production efficiency of the pipeline anticorrosive coating layer can be greatly improved, and the glass lining glaze is suitable for corrosion prevention ofoil field pipelines.

The invention discloses an efficient circulation automatic heating type multi-stage centrifugal blower. The efficient circulation automatic heating type multi-stage centrifugal blower comprises a base, a motor and a multi-stage centrifugal blower body, wherein the motor and the multi-stage centrifugal blower body are installed on the base, the multi-stage centrifugal blower body comprises a shell,an impeller and a main shaft, the main shaft is connected with the output end of the motor, a circulating air inlet and a circulating heating air outlet are formed in the two ends of the shell correspondingly, the impeller is driven by the main shaft to rotate so as to enable gas to be compressed and heated stage by stage from the circulating air inlet and be conveyed to the circulating heating air outlet, and a heat preservation layer is arranged on the outer wall of the shell. According to the multi-stage centrifugal blower, heat generated in the multi-stage compression process of the gas is effectively utilized, the heat energy is maximally used for drying and heating, then effective circulating and heating are achieved, the heat energy is maximally applied to places or objects required by drying and heating by utilizing the air volume circulating driving force, the highest temperature can be increased to several hundred degrees, the circulating air volume and the heating effect are guaranteed, and a good market application prospect is achieved.