6 results about "Ammonium thiosulfate" patented technology

This invention discloses a combined sulfur and arsenic inhibitor and its application, belonging to the field of mineral processing and flotation. The inhibitor comprises 1-2 parts calcium cyanamide and 4-8 parts ammonium salt, wherein the ammonium salt is one or both of ammonium thiosulfate and ammonium sulfite. This combined inhibitor exhibits good inhibition effects on pyrite and arsenopyrite, can be used under weakly alkaline conditions, reducing the amount of lime required; it has high selectivity, with virtually no inhibitory effect on copper sulfide ores; and it is highly adaptable, effectively inhibiting pyrite and arsenopyrite in copper sulfide concentrates containing chalcopyrite and bornite. The combined inhibitor of this invention requires a low dosage, effectively improving the grade of copper sulfide concentrate and reducing the arsenic content.

A process for producing organic fertilizers involves using a waste ammonia stream to capture sulfur dioxide from the oxidation of sulfur or a gas containing sulfur dioxide to make an ammonium bisulfite / sulfite solution. The sulfite solution is used to scrub hydrogen sulfide out of a biogas or other gas stream. The resulting products contain ammonium thiosulfate and ammonium bisulfite / sulfite.

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 utility model relates to the technical field of coke oven gas desulfurization processing systems, in particular to a thio optimization system for a coke oven gas desulfurization process, which is characterized in that a thio regulation device is added on the basis of an existing HPF-method coke oven gas desulfurization system, H2S monitoring technology of the thio regulation device is utilized, and real-time ammonia water supplementing and adding technology of an ammonia adding module is matched, so that the thio optimization of the coke oven gas desulfurization process is realized. The molar ratio of NH3 in ammonia water in the desulfurization tower to H2S in the tower is promoted to be greater than 2: 1, so that the reaction is promoted to be carried out in a direction beneficial to generating ammonium sulfide, NH3 in the ammonia water can fully react with H2S in the desulfurization process, the sulfur absorption rate of the system to coke oven gas is further improved, more ammonium sulfide is generated as much as possible, and the coke oven gas desulfurization efficiency is improved. The yield of elemental sulfur after decomposition of ammonium sulfide is increased, the sulfur recovery rate is increased, less ammonium hydrosulfide is generated, the generation of low-value by-salt ammonium thiosulfate is reduced in the regeneration process, the economic benefit is increased, the ammonia loss rate of the system is reduced, the loss is reduced, the cost is saved, and the stability of the system is improved.

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.