42results about How to "Fully degassed" patented technology

The invention discloses micro-alloying seamless pipeline steel and process for preparation. According to weight percentage, the range of the chemical components of the invention includes that C holds 0.08% to 0.20%, Si is equal to or less than 0.04%, Mn takes 0.60% to 1. 50%, S is equal to or less than 0.015%, P is equal to or less than 0.025%, Al is equal to or less than 0.04%, Ti is equal to or less than 0.04%, H is equal to or less than 2.5*10-4%, O is equal to or less than 25*10-4%, the rest is Fe and unavoidable foreign matters. The process for preparation comprises technique steps, including smelting, refining, continuous casting, hot rolling and slow cooling. Round steel with the size of phi 70 to 150 millimeters can be produced by the process for preparation. The seamless pipeline steel of the invention has perfect anti-sulphide stress corrosion (SSC resistance) capability and anti-HIC property. The pipeline steel which can substitute for welding pipe can be utilized in the filed of oil pipeline and the like, and the invention increases the reliability of material and adaptability of variety, in particular being adaptable for the low submarine temperature and corrosion-resistant environment and for manufacture of thick-walled tubes.

The invention discloses a high-resistant chromium-nickel electric heating alloy and a preparation process thereof. The chemical formula of the high-resistant chromium-nickel electric heating alloy is Cr20Ni80Al; the raw material formula of the high-resistant chromium-nickel electric heating alloy comprises the following components in percentage by weight: less than or equal to 0.03 percent of C, 1.40 to 1.60 percent of Si, less than or equal to 0.30 to 0.50 percent of Mn, less than or equal to 0.020 percent of P, less than or equal to 0.015 percent of S, 20.5 to 21.50 percent of Cr, less than or equal to 0.10 percent of Ti, less than or equal to 3.5 to 3.7 percent of AL, less than or equal to 1.00 percent of Fe, less than or equal to 0.2 percent of Zr, and the balance of Ni and inevitable impurities. According to the high-resistant chromium-nickel electric heating alloy, the electrical resistivity of the electric heating alloy is improved; the electrical characteristics are better; the anti-oxidation performance of an alloy material is improved; the high-temperature strength of the alloy is improved; the service life of the alloy is prolonged.

The invention discloses a rapid degassing method of a vacuum induction furnace. The method comprises the following steps: (1) according to the requirements of steel components, calculating weight of the needed scrap steel raw material and pre-deoxidizer as well as various alloys, weighing the materials, and pre-drying the pre-deoxidizer and the alloys; (2) placing the scrap steel raw material in a crucible, and placing the pre-deoxidizer and the alloys in a storage bin; (3) closing a vacuum chamber of the vacuum induction furnace and vacuumizing for 3-8 minutes; (4) transferring electrochemical steel into an inductor, then keeping vacuum degree at 0.05-0.1Pa, and continuously vacuumizing for 10-20 minutes; (5) stopping vacuumizing, charging argon into the vacuum chamber until pressure reaches 500-700Pa, starting a vacuum pump for vacuumizing to 0.05-0.1Pa, and then maintaining the vacuum degree for 10-20 minutes; (6) stopping vacuumizing, and then filling argon into the vacuum chamber until pressure reaches 500-700Pa; (7) adding the pre-deoxidizer and the alloys in the storage bin to molten steel for full circulation; and (8) naturally cooling the molten steel for 5-10 minutes in a vacuum state and then performing vacuum breaking and demoulding. Practices prove that, in the molten steel treated by the degassing method, the contents of the carbon element, the nitrogen element and the oxygen element are extremely low and are respectively not more than 15ppm, not more than 15ppm and not more than 20ppm.

The invention discloses a preparation method of an auricularia auricular polysaccharide beverage. The preparation method comprises the following steps: A) draining and grinding soaked auricularia auricula; and B) leaching auricularia auricula by virtue of hot water and stirring, so that water phase and solid phase are fully contacted and filtered. Furthermore, by virtue of the preparation method disclosed by the invention, ground auricularia auricula can be enzymatically hydrolyzed. The preparation method disclosed by the invention avoids such processes as polysaccharide precipitation, drying, powder preparation, and the extracted auricularia auricular polysaccharide is directly dissolved in an extracting solution; moreover, the extracted auricularia auricular polysaccharide is good in fluidity, low in viscosity and easy to filter. The entire process preparation method is simple and rapid, sufficient in extraction, high in efficiency, and suitable for scaled industrial production.

The invention provides a device and a method for preparing ultra-high purity difluoromono-chloroethane. The device comprises a heat exchangeable photochlorination reactor, an HCL-removing tower, a chlorine-removing tower, a dry buffer tank, a single-stage oil-free compressor, a degassing tower, a rectifying tower, a molecular sieve drier and a product tank. The method comprises the following steps: mixing raw materials and feeding the mixture into a photochlorination reactor for reaction, feeding the reactant into a two-stage water absorption HCL tower and a two-stage alkali liquor absorption chlorine gas tower to remove HCL and chlorine; feeding the obtained product into a dry buffer tank; compressing the gas from the dry buffer tank with a single-stage oil-free compressor and feeding the compressed gas into a degassing tower and a rectifying tower for degassing and rectifying to obtain difluoromono-chloroethane with moisture; and then removing the moisture with a molecular sieve drier to obtain a pure difluoromono-chloroethane product. According to the device and the method, the production flow of the difluoromono-chloroethane is shortened, the reaction conversion rate is high, the by-products are few, the rectifying efficiency is high, the raw materials and the energy consumption are reduced, the purity of the product is high and the production of the whole set of device is safe and economic.

The invention provides a passive degasser relating to a device for on line detaching gas in slurry lifted during oil exploration drilling, which is particularly suitable for the passive degasser. The passive degasser comprises a pot body, wherein the pot body is provided with a slurry inlet and a slurry outlet; the upper part of the pot body is the slurry inlet end; the lower end of the pot body is the slurry outlet end; and a slurry treatment body is arranged in the pot body. In the invention, the slurry treatment body is arranged to disperse and degas the slurry to be treated, and under a circumstance of having no power source drive, the slurry can be further diffused, that is fully dispersed, therefore, the degassing efficiency is effectively increased; and an airtight construction is arranged on the pot body to ensure that the slurry can be under an airtight condition in the whole degassing process of the degasser and all the gases collected by a sample air pump are the gases detached in treating the slurry in the pot body so as to provide guarantee for the accuracy of sample gas collecting data and for detecting the true gas content of a stratum.

The invention provides a 00Cr20Mo16 welding wire and a production process thereof. The welding wire is prepared from, by weight percentage, 0-0.03% of C, 0-0.3% of Si, 0.6-1.0% of Mn, 0-0.01% of P, 0-0.01% of S, 19.5-21.0% of Cr, 15.2-16.5% of Mo, 0-0.06% of Cu, 0-0.06% of Co, 0-0.15% of Ti, 0-0.03% of N, 0-2.0% of Fe and the balance Ni. According to the 00Cr20Mo16 welding wire and the productionprocess thereof, by optimizing alloy components and the manufacturing process, the finished product of the welding wire is high in yield and excellent in welding performance and can be applicable to asevere environment.

The invention provides a high-temperature fan corrosion-resistant alloy. The alloy comprises the following elements, in percentage by weight, of 0.05% to 0.10% of C, less than or equal to 0.70% of Si,less than or equal to 0.70% of Mn, less than or equal to 0.012% of P, less than or equal to 0.008% of S, 20.0% to 23.0% of Cr, 0.60% to 1.50% of Al, less than or equal to 2.0% of Fe, 10.0% to 13.0% of Co, 0.20% to 0.60% of Ti and the balance Ni and inevitable impurities. A preparation method of the high-temperature fan corrosion-resistant alloy comprises the steps of raw material preparation, vacuum smelting, electroslag remelting, forging, plate rolling and heat treatment. According to the alloy and the method, components and a process of the alloy are optimally designed, the alloy has the advantages of being good in high-temperature strength, high in high-temperature corrosion resistance and high in oxidation resistance, and the service life of a high-temperature fan can be prolonged.

The invention belongs to the technical field of aluminum alloy manufacturing, and particularly relates to a novel 4017 aluminum alloy sheet for a coating material and a preparation method of the 4017 aluminum alloy sheet. The novel 4017 aluminum alloy sheet for the coating material comprises the following alloy chemical components in percentage by mass: 1.35 to 1.4 percent of Si, 0.4 to 0.55 percent of Fe, 0.12 to 0.17 percent of Cu, 1.05 to 1.15 percent of Mn, 0.25 to 0.45 percent of Mg, 0.05 percent of Cr, 0.1 percent of Zn, 0.025 to 0.035 percent of Ti and the balance of Al. The novel 4017 aluminum alloy thin plate for the coating material is processed through the procedures of smelting, refining, cast rolling, cold rolling, primary intermediate annealing, cold rolling, secondary intermediate annealing, foil rolling of a finished product, pulling, straightening, cleaning and straightening, the lower limit tensile strength and the ductility of the processed finished product are far higher than those of a traditional aluminum alloy thin plate for a 4-series coating material, and the comprehensive performance is outstanding.

The invention discloses a flotation deinking machine for removing ink in waste paper pulp by utilizing an air flotation principle, wherein the flotation deinking machine comprises a closed flotation tank body, the flotation tank body comprises an outer cylinder body and an inner cylinder body, an ink discharging device is arranged in the inner cylinder body, and a plurality of accepted pulp conical grooves are arranged outside the inner cylinder body in the axial direction at intervals; a flow guide ring is arranged between the periphery of each accepted pulp conical groove and the outer cylinder body, the flotation tank body is divided into multiple stages of flotation units which are arranged up and down by the flow guide rings, pulp inlet jet distributors are arranged at the positions,corresponding to the flotation units, of the outer wall of the outer cylinder body, and spiral ascending ladder type pulp inlet flow channels are formed in the flow guide rings; a cone-like reinforcing device is arranged in each accepted pulp conical groove; each pulp inlet jet flow distributor is of a three-body structure formed by sequentially connecting a pulp inlet conical pipe, a distributionpipe and a pulp outlet conical pipe. The flotation deinking machine has the remarkable advantages of high deinking efficiency, high whiteness of deinked pulp, good brightness, high concentration of discharged ink, little fiber loss, small occupied area and the like, and meets the requirements of the modern paper making industry on the quality of paper pulp.