15 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.

The invention discloses a method for synergistically recovering valuable metals from copper-lead-zinc smelting slag through a wet process, which comprises the following steps: crushing smelting slag, scum and intermediate slag until the particle size is less than or equal to 0.15 mm, mixing according to a mass ratio of 3: 2: 1, adding 5-10% of sodium citrate, and ball-milling until the specific surface area is more than or equal to 500m / kg to break an inclusion; a graded leaching process is adopted, specifically, in the acidic stage, copper and zinc are synergistically leached through sulfuric acid with the concentration of 1.5-2.5 mol / L and hydrogen peroxide with the concentration of 0.1-0.3%, in the alkaline stage, lead and silver are leached through complexing of NaOH with the concentration of 2-4 mol / L and EDTA with the concentration of 0.05-0.1%, fractional precipitation is conducted through sodium sulfide, and in the thiosulfate stage, gold is catalytically leached through ammonium thiosulfate with the concentration of 0.5-1.0 mol / L and Cu < 2 + > with the concentration of 0.02- And finally, 5-8% of phosphate curing agent is added into tailings for stabilizing treatment. According to the method, the copper-zinc recovery rate is larger than or equal to 95%, the lead-silver recovery rate is larger than or equal to 90%, the gold recovery rate is larger than or equal to 85%, and the comprehensive The non-cyanide process is combined with closed circulation of wastewater, so that the heavy metal curing rate is more than or equal to 99%, the leaching toxicity reaches the GB5085.3-2007 standard, and the method is suitable for multi-metal cleaning recovery and resource utilization of smelting slag.

The invention relates to the technical field of slow-release fertilizer additives, and discloses preparation and application of a stable slow-release slow-release fertilizer additive. The stable slow-release slow-release fertilizer additive is prepared from the following raw materials: 25 to 35 parts of sodium lignin sulfonate, 21 to 31 parts of carboxymethyl cellulose sodium, 11 to 21 parts of dicyandiamide, 3 to 8 parts of hydroquinone, 3 to 7 parts of cellulase, 8 to 15 parts of tetrahydroxy imidazoline, 3 to 8 parts of hydroxamic acid acetate, 3 to 8 parts of ammonium thiosulfate, 0.5 to 3 parts of an auxiliary additive, 1 to 8 parts of a synergist and 1 to 5 parts of a trace element agent. According to the scheme, the sodium lignin sulfonate and the carboxymethyl cellulose sodium are used as main frameworks to replace a large amount of petroleum-based resin, the raw material cost is reduced, the biodegradation rate is increased, the sodium lignin sulfonate and the carboxymethyl cellulose sodium form a three-dimensional network structure, and the slow release and biodegradability are achieved.

The application provides a desulfurization waste liquid treatment method, and belongs to the technical field of waste water treatment. The desulfurization waste liquid is subjected to step-by-step salt extraction to obtain ammonium thiosulfate, ammonium thiocyanate and ammonium sulfate; the ammonium thiosulfate is purified by using ethanol to obtain pure ammonium thiosulfate; the ammonium thiocyanate is purified by using ethyl acetate-acetone and ethyl acetate step by step to obtain pure ammonium thiocyanate; and the ammonium sulfate is purified by using a water-acetone mixed solution to obtain pure ammonium sulfate. The application first subjects ammonium thiosulfate, ammonium thiocyanate and ammonium sulfate in the desulfurization waste liquid to rough extraction by using step-by-step salt extraction, and then subjects the ammonium thiosulfate, ammonium thiocyanate and ammonium sulfate to purification by using specific solvents, so that pure ammonium thiosulfate, pure ammonium thiocyanate and pure ammonium sulfate with high purity are obtained, and the added value of the products is effectively improved.

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.

A process for substantially removing hydrogen sulfide from an ammonium sulfate solution. The process involves maintaining the pH of the solution to a range that optimally removes entrained hydrogen sulfide. The hydrogen sulfide is then reacted with sulfites, bisulfites, or sulfur dioxide to form ammonium thiosulfate.

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 invention discloses a gold-silver alloy integrated electroplating method which comprises the steps that gold potassium cyanide with the gold ion capacity of 10-30 g / L and silver nitrate with the silver ion capacity of 5-15 g / L are dissolved in deionized water according to the preset proportion, and the molar ratio of gold ions to silver ions is 1: 9; a composite complexing agent of ammonium thiosulfate and EDTA-2 sodium is added, and the mass concentration ratio of ammonium thiosulfate to EDTA-2 sodium is 1: 2-1: 5; the pH value of the plating solution is monitored in real time through an online pH sensor, ammonia water or dilute sulphuric acid is automatically injected to maintain the pH value to be 8.5-10.5, and the dissociation rate ratio of gold and silver complex ions is stabilized to be 1: 0.8-1: 1.2; and a cathode shaking device is set to swing at the frequency of 10-30 Hz, the flow of a plating solution circulating system is set to be 10-15 L / min, and electroplating is carried out for 1000-2400 seconds under the current density of 0.2-0.8 ASD. According to the method, a compact and layering-free Au / Ag alloy plating layer can be formed, and the technical problems that in traditional gold-silver alloy electroplating, layering is prone to occurring, and components are not uniform are solved.

The invention relates to a sulfur foam liquid salt extraction and acid making coupling process, which comprises the following steps: carrying out solid-liquid separation on sulfur foam liquid to obtain a first solid material and a first liquid material, decoloring the first liquid material, and concentrating to obtain a slurry material and a second liquid material; the first solid material and the slurry material are incinerated, and first synthesis gas is obtained and used for preparing concentrated sulfuric acid; and cooling the second liquid material, and centrifuging to obtain ammonium thiocyanate. The sulfur foam liquid is subjected to solid-liquid separation, so that the waste liquid amount is reduced, the equipment volume in the salt extraction area is reduced, and the cost is reduced. An oxidation process in the salt extraction area is canceled, ammonium thiosulfate is subjected to high-temperature concentration and then is subjected to centrifugal separation to obtain crystals, the crystals and the separated ammonium sulfate are sent to the acid making area to be incinerated, and generated tail gas is sent to a desulfurization and denitrification section of a coking plant to be treated, so that emission without solid waste is realized, and maximum utilization of sulfur element and ammonium thiocyanate in sulfur foam liquid is realized.

The invention relates to the technical field of agricultural fertilizers, and discloses a high-absorption liquid compound fertilizer for direct drip irrigation application, which comprises the following raw materials by weight: 45-50% of potassium nitrate; 10%-15% of monoammonium phosphate; 7%-11% of urea; 6%-9% of calcium nitrate; 8%-12% of ammonium sulfate; 4%-7% of magnesium sulfate heptahydrate; 3-5 parts of a seaweed extract; 2%-4% of boron humate; 1%-3% of EDTA disodium; 2%-5% of zinc polyphosphate; 0.5%-1% of ammonium thiosulfate; 0.5%-1% of ammonium molybdate; 1%-2% of amino acid manganese; 0.5%-1.5% of fulvic acid; 0.1%-0.5% of sodium diethylhexyl sulfosuccinate; 0.6%-0.9% of citric acid; 0.2%-0.7% of ascorbic acid; the liquid compound fertilizer is prepared according to the raw materials, the liquid compound fertilizer which is high in absorption, high in efficiency, stable and adaptive to a drip irrigation system is obtained, the growth vigor of crops, the fruit quality and the yield can be improved, meanwhile, blockage of the drip irrigation system is reduced, the service life of equipment is prolonged, and the liquid compound fertilizer has good application value.

The application provides a treatment method of K acid synthesis oxidation section wastewater, comprising the following steps: S1, adding ammonium thiosulfate to mother liquor wastewater generated in the oxidation section at normal temperature, continuously stirring for 30-60 min, and passing in ammonia gas until no precipitate is separated out; S2, centrifuging the solid-liquid mixture, separating out ammonium sulfate crystals and mother liquor, recycling the ammonium sulfate, and separating out ammonia gas, water and DMF from the mother liquor through rectification. The ammonium sulfate produced by the application can be directly sold for the chemical fertilizer industry, the rectification-purified DMF can be reused in the oxidation section, and the water can be reused to clean the oxidation section products, so that the wastewater in the oxidation section is maximally recycled and recovered. The application has the advantages of simple process operation, low labor intensity, no environmental pollution and the like, meets the clean production standard, and is suitable for large-scale wastewater treatment. Meanwhile, the application can not only save the cost of treating wastewater in a wastewater treatment station, but also bring additional sales benefits, so that the economic benefits of enterprises are improved.

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.

The invention discloses a sulfur foam full-quantification recovery treatment system and method based on an integrated reaction tower, and belongs to the field of coking hazardous waste resource utilization. The core is an oxidation-catalysis integrated reaction tower which is provided with a forced oxidation zone, a heat insulation flow guide liquid distribution zone and a fixed bed catalytic conversion zone from top to bottom and is communicated only through 3-5 layers of annular V-shaped grooves with gradually decreased diameters. After being forcibly oxidized, concentrated slurry is uniformly distributed to a catalytic area through a V-shaped groove, and under the action of a graded porous activated carbon loaded Fe-Cu bimetallic catalyst, ammonium thiosulfate and ammonium thiocyanate are deeply converted into ammonium sulfate. Material conveying heat loss and intermediate inactivation are eliminated, full-cross-section uniform liquid distribution is achieved, energy consumption is remarkably reduced, the conversion rate of ammonium thiocyanate is larger than or equal to 99.7%, continuous operation lasts for more than 1980 h, full-quantitative recovery of sulfur and nitrogen elements is achieved, and the method is suitable for industrial treatment of coking sulfur foam.

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.