33results about How to "Stable high temperature resistance" patented technology

The present invention provides an anhydrous stemming for blast furnace. Its composition includes (wt%) coarse brown corundun 1-4%, fine brown corundum 2-5%, coarse mullite 7-15%, fine mullite 9-20%, coke powder 15-20%, clay 10-19%, silicon carbide 7-11%, sericite 5-8%, bitumen 2-4% and anthracene oil 15-25%. It has good working property, stable high temperature resistance, excellent caking property, quick agglutinating property, low ton-iron stemming consumption, low contraction rate and high strength, it can raise tap up-to-standard rate to 100% from original 61.5%, can raise production safety of blast furnace, and can raise smelting strength.

The invention relates to a carbon-based proppant, specifically a C / C composite material with coke as a reinforcement and asphalt as a matrix precursor; the technical problem to be solved is to provide a low-density , high strength, wear resistance, high temperature resistance, good chemical inertness and good flow conductivity proppant, and provide the preparation method of the proppant at the same time; the technical scheme adopted is coke? 25-45%, modified asphalt 55-75%, the finished product is obtained through impregnation, isolation, curing and firing; the invention is widely used in the field of proppant technology.

The invention relates to a method for preparing needle coke by coal-tar asphalt, using the coal-tar asphalt with abundant resource as raw material. The apparatuses including a beaker, an ultrasonic cleaner, a microwave oven, a high temperature furnace, a reaction kettle, a glass test tube, an enameled copper wire, a direct current power supply, a nitrogen bottle, a vacuum pump, an electric cabinetand the like are used to prepare black crystal needle coke by the working procedures of heating and fusion, ultrasonic activation, microwave catalysis, magnetic field induction, high temperature calcinations and the like; and then needle coke is generated by fusing at 150 DEG C, ultrasonically activating at 20 DEG C, catalyzing by microwave at 200 DEG C, inducing by a magnetic field at 420 DEG C,and calcinating at 940 DEG C. The chemical and physical properties of the needle coke are stable; the intensity, the toughness and the high temperature resistance of the needle coke can be increasedby 26%; and the product yield is up to 78%. The needle coke can be matched with a plenty of chemical substances to make into a plenty of industrial products such as high temperature-resistant electrode and the like. The preparation method has short technological processes, and is safe, stable and reliable. The method is an ideal method for preparing carbon material crystal needle coke by coal-tarasphalt.

The invention discloses a black-increasing agent for a high-temperature infrared-radiation energy-saving coating. The black-increasing agent is prepared by the following raw materials in percentage by weight: 20-60% of MnO2, 10-20% of Fe2O3, 1-5% of Co2O3, 5-10% of CuO, 0-10% of Cr2O3, 0-10% of NiO, and 20-40% of emery powder. The invention also discloses a preparation method of the black-increasing agent for a high-temperature infrared-radiation energy-saving coating. The black-increasing agent provided by the invention has the advantages of wear resistance, high temperature resistance and stable radiance, and is mainly used for fireproof base materials such as alumina bricks and mullite and metal base materials for boiler water wall tubes. The prepared coating has high infrared emitting ability at the temperature below 1300 DEG C within a broadband of 2.5-16.7 mum, with the average value being 0.88-0.92. The service temperature reaches up to 1450 DEG C, the black-increasing agent is stable at high temperature, the service life is not less than three years, the process is simple, and the cost is low.

The invention provides an acidic inorganic repairing agent and its preparation method and repairing method, comprising: silica sol, silicon dioxide, boron nitride, and glass glaze; wherein, the pH value of the silica sol is 2-5. The acidic inorganic repairing agent of the invention can avoid the problem of pyrolysis of organic resins, is suitable for use at high temperatures, and has a stable and long-lasting repairing effect on ceramics and their composite materials that are not resistant to alkali.

The invention provides a white-light interference high-temperature measuring device, which comprises a sensor, a white-light light source, a spectrograph and a data processor, wherein the sensor comprises a collimation lens, a polarizer and a sapphire right-angle prism, and the sapphire right-angle prism is used as a temperature sensing component. Light emitted from the white-light light source passes through an incident optical fiber to enter the collimation lens, and then becomes parallel light; the parallel light is divided into o light and e light by the polarizer; the o light and the e light are further transmitted to the sapphire right-angle prism; the sapphire right-angle prism reflects the o light and the e light back; the o light and the e light which are reflected back pass through the polarizer again to be interfered to obtain interfered light; the interfered light passes through the collimation lens, then is converged at a receiving optical fiber, and enters the spectrograph; the spectrograph carries out stripe detection on the interfered light, and conveys the detected spectral interfered stripe data to the data processor; and the data processor processes the interfered stripe data conveyed from the spectrograph and calculates out a temperature. The high-temperature measuring device has the advantages of high temperature resistance, corrosion resistance, high measurement precision, convenience in mounting, low cost and wide application aspect.