3 results about "Ammonium thiosulfate" patented technology

This invention relates to the field of mineral processing, specifically to a flotation activator and enhanced flotation method for high-calcium-magnesium, low-grade copper-cobalt oxide ores. In the flotation activator, the mass ratio of sulfiding agent to ammonium thiosulfate is 40-50:30-40, and the mass ratio of ammonium thiosulfate to sulfite is 30-40:10-20. This invention fully utilizes the synergistic effect between the compound reagents, employing sulfiding agent, ammonium thiosulfate, and sulfite as flotation activators to achieve continuous activation and controllable regulation of the sulfidation process of copper-cobalt oxide minerals, significantly improving the stability and activity of the sulfidation film on the surface of copper-cobalt oxide minerals. Sulfite can weakly coordinate with the active sites of copper and cobalt on the surface through its sulfur-oxygen organic groups, lowering the energy barrier of the sulfidation reaction and helping to improve the stability of the sulfidation film. Simultaneously, its strong reducing properties regulate the sulfidation reaction process, reducing the non-selective oxidation and consumption of the sulfiding agent, making it particularly suitable for high-calcium-magnesium copper-cobalt ores.

The application discloses a waste liquid evaporation and salt separation resource treatment system, and belongs to the field of desulfurization waste liquid treatment. The waste liquid evaporation and salt separation resource treatment system comprises, in sequence, an oxidation kettle, a decoloring tower, a first centrifugal separator, a vacuum evaporation kettle, a second centrifugal separator, a crystallization kettle and a third centrifugal separator. The liquid outlet end of a liquid inlet assembly is communicated with a liquid collecting ring. A plurality of nozzles are equidistantly and circumferentially spaced apart on the top of the liquid collecting ring and are all upwardly inclined towards the middle. One air outlet end of a gas distribution assembly extends to the upper part of the inside of the kettle body to spray air downward. The other air outlet end of the gas distribution assembly is located below the inside of the kettle body and has a plurality of gas distribution layers. Each stirring blade of a stirrer has one gas distribution layer below. Ammonium thiosulfate in the desulfurization waste liquid is completely converted into ammonium sulfate by a catalytic oxidation method, and then high-quality ammonium thiocyanate and ammonium sulfate are extracted by an evaporation and crystallization method.

This invention discloses a resource-based treatment process and system for desulfurization wastewater in the coking industry, belonging to the technical field of utilization and treatment of desulfurization wastewater in the coking industry. The system includes a decolorization device, a preheater, a mixer, a first reactor, a second reactor, a third reactor, a fourth reactor, a fifth reactor, and a conversion tower. After decolorization, preheating, mixing with acid, multiple reactions, catalytic conversion, and cooling separation, all ammonium thiosulfate and ammonium thiocyanate in the desulfurization wastewater are converted into ammonium sulfate and sulfur. Then, taking advantage of the water shortage and salt production characteristics of the ammonium sulfate section in the coking system, the resource-based recovery and treatment of ammonium sulfate and water in the converted solution is achieved. Through the setup of multiple reactors and effective control of experimental conditions, this invention can achieve the effective recovery and utilization of resources such as sulfur, nitrogen, and water in the desulfurization wastewater; while reducing the difficulty of treating the conversion waste gas, it increases the sulfur yield and improves the continuity and economy of the wastewater treatment process.