A method of obtaining a crystal of potassium chloride from the cyclone dust potash ore flotation concentrate |
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IPC classes for russian patent A method of obtaining a crystal of potassium chloride from the cyclone dust potash ore flotation concentrate (RU 2232130):
 The method of obtaining dust-free potassium fertilizers / 2215717
The invention relates to techniques for the production of potassium chloride from sylvinite ores with low content of dust fractions
 The method of obtaining potassium fertilizers / 2196759
The invention relates to the field of production of potash fertilizers from sylvinite ores by flotation method
The method of obtaining salt / 2167286
 The method of obtaining potassium chloride / 2154025
The invention relates to techniques for processing fine potassium chloride, resulting in the production of potash fertilizers from sylvinite ores
 The method of obtaining potassium chloride / 2147011
The invention relates to the processing of potash ores, in particular the production of mineral fertilizers
The method of obtaining potassium chloride / 2143999
The invention relates to techniques for the production of potassium chloride from sylvinite ores by the method of dissolution-crystallization
 The method of obtaining potassium chloride from sylvinite ores / 2136594
The invention relates to the enrichment of sylvinite ores upon receipt of potassium chloride
 The way quasi determine the degree of saturation silvina hot solutions and device for its implementation / 2114804
The invention relates to a method continuous determining the degree of saturation Silvina hot solutions and device for its implementation
Potassium chloride and sodium chloride production process / 2307790
Invention is intended for use in chemical and mining industries to manufacture mineral fertilizers and food salts. Ground sylvinite ore is dissolved in recycled potassium chloride-saturated lye. Resulting solution is directed at a rate of 0.03-0.15 m/s to leaching in the first dissolution column, with its electrodes connected to one of a current source poles, and treated by low-frequency (1-5 Hz) alternating electric field at voltage 30-100 v. Solution thus enriched with potassium chloride is fed together with solid phase into the downstream second dissolution column with its electrodes connected to opposite pole of the current source. Treatment by alternating electric field in the second column is effected under the same conditions as in the first column. Two-step leaching results in potassium chloride solution and sodium chloride-enriched solid phase. Separated sodium chloride is sent to production of food salt. Potassium chloride is separated from solution via crystallization.
Method of separation of potassium chloride / 2315713
Proposed method includes dissolving of sylvinite, clarification of hot saturated lye, crystallization of product in presence of fluoro-reagents, thickening and filtration of suspension and treatment of non-clarified saturated lye. Clarified saturated lye is treated with hot solution saturated with potassium chloride before crystallization of product. Potassium chloride solution is obtained by dissolving off-grade floatation potassium chloride in water. Off-grade floatation potassium chloride is just cyclone dust, fine fractions of floatation product or filtered-off intermediate product used for forming sludge suspension which is clarified and is thickened after clarification and is directed for treatment of non-clarified saturated lye.
Method for processing salt rejects of magnesium production / 2316604
Method comprises steps of grinding salt rejects material; leaching them by means of concentrated solution of potassium chloride; separating mother liquor and solid potassium chloride; washing potassium chloride and drying potassium chloride; before washing procedure, dissolving solid potassium chloride in water at temperature 70 - 90°C; filtering solution and cooling filtrate till temperature 10 - 25°C; filtering received suspension of potassium chloride; washing deposit by means of potassium chloride solution with concentration 300 - 350 g/dm3 and filtering it; returning prepared filtrate for leaching salt rejects material.
 Method of producing brine for electrolysis / 2347746
Present invention can be used for obtaining aqueous saturated solutions of alkali metal halides, which are used in the production of chlorine and alkali from electrolysis. The method of producing aqueous saturated brine of alkali metal halides involves underground dissolving of salt deposits with simultaneous purification of brine in the brine production well. Purification from toxic impurities - calcium and magnesium compounds is done using spent brine of a halide of the corresponding metal as the solvent, obtained from an electrolysis unit with pH 9-12. The brine from the well is then purified from calcium and magnesium compounds.
 Method of controlling process of sylvinite ore dissolution / 2352385
Invention relates to technique of controlling processes of sylvinite ores dissolution and can be used in production of potassium chloride by dissolution-crystallisation method. Method of controlling processes of sylvinite ores dissolution includes regulation of ore supply depending on content of useful component in input flows, measuring ready solution temperature and determining sodium chloride content in solution by calculation method. Additionally determined are density, temperature and consumption of dissolving solution, content of sodium chloride in it is determined by content of useful component, density and temperature. Ore supply is calculated according to suggested equation and calculated value is given as task to system of weigher control.
Potassium chloride obtaining method from sylvinite ore / 2366607
Method involves ore crushing, mill pulverising, sludge removal, grouping of desludged ore suspension. Coarse fraction of desludged ore suspension with density of 60-70% of solid matter is conditioned with emulsion of reagents, which is taken in quantity of 60-70% of total reagent flow; then, coarse fraction is combined with small fraction of desludged ore suspension with density of 30-40% of solid solid matter and supplied to the combined floatation. At that, the rest part of the emulsion of reagents is supplied in parts immediately to the combined floatation process thus obtaining crude concentrate and remainders. Crude concentrate is processed thus obtaining the finished product, and floatation remainders are grouped, small fraction of remainders is supplied to the dump pit, and coarse one - to the mill to be pulverised. When coarse fraction of ore suspension is being conditioned, water solution containing hydrochloride of high-molecular amine, oksal and catalytic gas oil at mass ratio of 1:0.4:0.4 correspondingly is used as emulsion of reagents.
 Device for processing of sylvinite-carnallite raw materials / 2369558
Device for processing of sylvinite-carnallite raw materials includes the following components installed along with flow - lye clarifier, two dissolving apparatuses connected to each other, augers and drier. Dissolving apparatuses are installed vertically along flow one after another and are connected to each other by means of transport auger. The last of apparatuses is connected to drier via dehydration auger installed at the angle of at least 15°. Inside each dissolving apparatus, coaxially to flow, there is a column installed for processing of mix with alternating feeding and grounding electrodes installed in them. Walls of column for processing of mix and dissolving apparatus create a tube space for lye drain.
 Method to control silvinite ore dissolution / 2398620
Invention can be used in production of potassium chloride. Proposed method comprises control over ore feed subject to content of useful component in inlet flows, measurement of ready solution temperature, density, temperature and consumption of dissolving solution. Additionally, content of potassium chloride in ready solution is measured after its defecation, as well as its consumption. Obtained data and temperature are used to determine roe feed to correct its main flow in compliance with the following relation, and calculated magnitudes are entered in proportioner control system:
 Method to control carnallite ore dissolution / 2404845
Invention can be used in production of synthetic carnallite. Proposed method comprises adjusting ore feed depending upon the content of useful component in inlet flows and measurement of temperature. Besides solvent flow rate, solvent density and content of magnesium chloride therein and content of potassium chloride in carnallite ore flow are measured. Parametres thus obtained allow determining carnallite ore flow rate from the relationship indicated below to make setting to be incorporated with ore consumption control system:
 Method of controlling process of dissolving potassium chloride / 2409415
Invention can be used in halurgic production. The method of controlling the process of dissolving potassium chloride involves controlling supply of ore depending on content of the useful component in input streams, measuring temperature of the ready solution and consumption of dissolving solution. The ore used is an electrolyte obtained during electrolysis of molten dehydrated synthetic carnallite having the following composition: KCl - 60-80 %, MgCl2 + CaCl2 - 7-9%, insoluble particles - up to 1 %, NaCl - the rest. Content of magnesium chloride in the ready solution, its consumption, content of potassium chloride in the halite wastes and its consumption are also measured. The obtained parametres are used to determine maximum content of potassium chloride in the ready solution. The optimum consumption of electrolyte is calculated and the calculated value is used as a setting in the electrolyte consumption control system:
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(57) Abstract: The invention relates to the processing of sylvinite ores in potash and is intended for the production of white potassium chloride from the cyclone dust flotation concentrate. A method of obtaining a crystal of potassium chloride from the cyclone dust flotation concentrate potash ore involves the dissolution of the cyclone dust whitening solution from the clay slurry with the introduction of polyacrylamide coagulant and crystallization of potassium chloride from the clarified solution. The dissolution of the cyclone dust is carried out in the presence of reactant-modifier from the class alkylphenolic esters of polyethylene glycol. As reactant-modifier used OP-10, OP-7 or Neonol AF 9-12, AF 9-14 with a specific consumption of 2,5-10,0 g / tonne dissolved cyclone dust. Developed a more efficient technology solution treatment cyclone dust from colloidal suspensions of the clay slurry and the suppression of the negative effect of residual flotation reagents. 1 C.p. f-crystals, 2 tab. The invention relates to the processing of sylvinite ores in potash and is intended for the production of white potassium chloride from the cyclone dust flotation concentrate. Ciclon the STV, due to the lower content of potassium chloride and fine composition, and therefore not suitable for implementation in a commercial product. In the cyclone dust in substantially contained clay sludge, and residual flotation reagents (aliphatic amines, technical flutamin, OK, oxal, etc) used in the flotation method of processing of sylvinite (potash ore. A method of obtaining potassium chloride, in which small fraction of crushed potash ore is first treated with a flocculant, thicken and platinuum, and then spend hydro-mechanical desliming and again flotation (USSR Author's certificate No. 1527230, CL 05 D 1/04 from 11.08.1987 year). The disadvantages of this method are complex technological scheme, a large consumption of reagents, the relatively low extraction KS1 from the fine fraction in the product. Know of any other way to obtain the potassium chloride of potash ore, including its grinding, desliming, flotation, dewatering and drying of the concentrate, where the fine fraction separated from the main power silverboy flotation, bessellieu together with the crushed ore and return on flotation (patent No. 2057102). OE. Eventually small fraction together with the flotation concentrate of potassium chloride is fed to the drying, forming a large number of cyclone dust fine composition. This dust is usually sent for additional processing by the method of granulation, which is costly, energy intensive and inefficient process. The closest in technical essence to the claimed technical solution is the way to obtain the potassium chloride from the cyclone dust flotation concentrate, which involves the dissolution of the cyclone dust whitening solution from the clay slurry with the introduction of polyacrylamide coagulant and crystallization of potassium chloride from the clarified solution (Popova T. M., Yuri M. I. Analysis of technological schemes of processing dust fractions of the flotation concentrate. "Prospects for the use of new raw materials in the production of potash fertilizers. L.: 1980, page 13-20). Production tests and practice of experimental-industrial applications at JSC "Uralkali" showed the unsuitability of this method of recycling cyclone dust for white potassium chloride, meets the requirements of GOST 4568-95 and conditions of supply to foreign consumers. This is because when dissolved cyclone is a stable colloidal suspension of the clay slurry, which is not settled within 24 hours and even longer time. Crystallization of such a solution is highlighted crystalline potassium chloride with an intense pink color. A coloured product is considered substandard and usually not accepted foreign consumers of potash. To address these shortcomings requires a robust technology solution treatment cyclone dust from colloidal suspensions of the clay slurry and the suppression of the negative effect of residual flotation reagents. To solve this problem is proposed dissolution cyclone dust whitening solution from the clay slurry with the introduction of polyacrylamide coagulant and crystallization of potassium chloride from the clarified solution. The dissolution of the cyclone dust is carried out in the presence of reactant-modifier from the class alkylphenolic esters of polyethylene glycol: OP-10, OP-7 or Neonol AF-12, AT-14 with a specific consumption of 2,5-10,0 g / tonne dissolved cyclone dust. When the specific consumption of the reactant-modifier less than 2.5 g / tonne of dust decreases dramatically positive effect, and increased reagent consumption is more than 10.0 g per tonne of dust does not lead to further enhancement of the effectiveness of acess dissolution cyclone dust flotation concentrate provides: - quality cleaning solution from the clay slurry in its clarification by settling; - getting white potassium chloride by crystallization from the clarified solution cyclone dust; - improved particle size distribution of the obtained crystals KCl; - achieving a high positive effect at low additional cost; - increase the completeness of extraction of potassium chloride in the product when flotation enrichment of sylvinite ore potash fertilizer. The proposed method of obtaining potassium chloride from the cyclone dust flotation concentrate processed in laboratory studies and passed production tests of OJSC "Uralkali". Example: Cyclone dust captured during drying flotation of potassium chloride, dissolved in two horizontal apparatus with mixing devices heated to a predetermined temperature, an aqueous solution, which comes from wet scrubbers flue gas dryers. In the first solvent, together with scrubbing solution is dosed with 0.1% solution of reagent-modifier with the recommended flow rate. Suspension cyclone dust containing solution x is th solvent is continuously directed to a receiving tank. Then the suspension pump is pumped through the surface of the heater in the two-piece tapered sump, in which impose 0.1% solution of polyacrylamide coagulant at a rate (12-15) g PAA per tonne dissolved cyclone dust. Clarified from the clay slurry and discolored solution from the settling tank is passed through the buffer capacity in the main production galilejskogo potassium chloride, where the vacuum-cooling solution carry out the crystallization process. The crystals formed KS1 separated from the mother liquor and dried, yielding a white commercial product, which is shipped to consumers. The results of the laboratory test method are given in table 1. Results of industrial tests of the method are given in table. 2. 1. A method of obtaining a crystal of potassium chloride from the cyclone dust potash ore flotation concentrate, including the dissolution of the cyclone dust whitening solution from the clay slurry with the introduction of polyacrylamide coagulant and crystallization of potassium chloride from the clarified solution, characterized in that the dissolution of the cyclone dust is carried out in the presence of reactant-modifier from the class alkylphenolic esters of politely-7 or Neonol AF 9-12, AF 9-14 with a specific consumption of 2,5-10,0 g / tonne dissolved cyclone dust.
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