4 results about "Calcium sulphide" patented technology

The application discloses an environment-friendly rubber auxiliary agent NS preparation process and belongs to the technical field of coal. The self-synthesized calcium sulfide / hollow spur-shaped manganese dioxide nanometer balls and interpenetrating polymer polymers are added, the hollow structure of the calcium sulfide / hollow spur-shaped manganese dioxide nanometer balls is provided with a larger specific surface area and porosity, can be used as stress dispersion points in a rubber system, can relieve stress concentration of rubber in a stretching and compression process, can improve tear strength and fatigue resistance of rubber products, the surface spur-shaped morphology can enhance the interface bonding force between the nanometer particles and the rubber matrix, can reduce filler aggregation, can ensure uniform dispersion of the auxiliary agent in the rubber, and further stabilize the mechanical properties of the rubber. The calcium sulfide / hollow spur-shaped manganese dioxide nanometer balls and the interpenetrating polymer polymers interact with each other, and the hollow spur-shaped structure can be embedded into the interpenetrating polymer polymers to play a bridging role.

This invention belongs to the field of solid waste resource utilization technology, specifically relating to a method for preparing highly active calcium oxide through low-temperature decomposition of phosphogypsum based on composite additives. The method involves uniformly mixing phosphogypsum with composite additives, followed by heating and decomposition under a non-strong reducing atmosphere to obtain a solid product containing calcium oxide. Subsequently, byproducts are selectively separated to remove the remaining product, yielding highly active calcium oxide. Compared with existing technologies, this invention eliminates the need for carbonaceous reducing agents and strong reducing gases, avoiding the formation of calcium sulfide intermediates. The synergistic effect of the composite additives enables the direct decomposition of phosphogypsum at lower temperatures, improving the reactivity and specific surface area of ​​calcium oxide, while simplifying the process and reducing energy consumption.

The present application discloses a kind of coating of electrode, electrode and its preparation method and application, coating includes by weight parts: 8.0-14.0 rutile, 6.0-8.0 marble, 1.5-3.5 fluoride, 1.5-3.0 mica, 5.0-9.0 potassium feldspar, 0.8-1.6 electrolytic manganese, 0.4-1.0 ferro titanium, 2.0-4.0 metal chromium, 1.0-3.0 metal nickel, 0.1-0.6 iron sand, 0.1-0.4 calcium sulfide and 0.4-0.6 soda ash;Coating and welding core constitute electrode, electrode is applied to austenite-ferrite dissimilar steel surfacing, and the plasticity and toughness of deposited metal after surfacing forming are good, and corrosion resistance is excellent, satisfy the surfacing requirement of petroleum, chemical, hydraulic and nuclear power equipment.

The application provides a resource utilization system and method and application of industrial phosphogypsum and organic waste salt, and the resource utilization method comprises the following steps: mixing, granulating, calcining, water immersion treating and post-treating: industrial phosphogypsum, organic waste salt and a reducing agent are mixed and granulated to obtain a mixture; the mixture is subjected to calcining treatment to obtain a calcined product and a calcined tail gas; the calcined product is subjected to water immersion treatment to obtain a precipitate and a salt-containing solution, and then the precipitate and the salt-containing solution are respectively subjected to post-treatment to obtain a recovery product. The organic waste salt has the characteristics of molten salt at high temperature, the decomposition temperature of the phosphogypsum is reduced, the decomposition efficiency of the phosphogypsum is improved, the conversion rate of the phosphogypsum to calcium sulfide reaches more than 98%, and the organic matter in the organic waste salt is removed, and the removal rate of the organic matter reaches more than 99.5%. The method not only realizes the collaborative disposal and resource utilization of the industrial phosphogypsum and the organic waste salt, but also is environmentally friendly, safe and efficient, and is a green and clean resource utilization process.