SU1291544A1 - Method of isolating schoenite from polymer-mineral potassium ores - Google Patents

Abstract

The invention relates to chemical technology of chenite, can be used in the processing of ores containing chlorine sulphate salts of potassium, sodium and magnesium, and reduces the loss of potassium and sulphate ions, as well as improves the grain size distribution and increases its velocity. . The method is carried out by dissolving polymineral potassium ore in a reusable chenitic f-solution, pretreated with soda in the amount of 40-60% of the magnesium ion stoichiometry. The basic magnesium carbonate is separated, washed with water, the washings of the mixture are mixed with the circulating mother liquor, the sludge is separated after dissolution of the ore, the crystallized sinter is cooled by cooling the resulting shenitic solution, the shenite is separated and the mother liquor is returned to the dissolution stage ore. 1 tab. (L N9; about SP

Description

eleven

The invention relates to the chemical technology of inorganic substances, specifically to the chemical technology of gaenite, and can be used in the processing of ores containing chlorine sulphate salts of potassium, sodium and magnesium.

The aim of the invention is to reduce the loss of potassium and sulphate ions. as well as an improvement in the granulometry of the shenite and its release rate.

The method is carried out by dissolving polymineral potash ore in circulating mother-of-shenite solution pretreated with soda in an amount of 40-60% of the magnesium ion stoichiometry, separating the basic magnesium carbonate, washing it with water, filtering and mixing the filtrate with the circulating mother liquor, separating After the ore has been dissolved, sludge is fed, the shenit is cooled by cooling the resulting solution, and part of the mother liquor is returned to the ore dissolution stage.

Example. 970.5 kg turnaround. first uterine shenitovy solution of average weight composition,%: K 4.15; Mg 2.56; Ca 0.03 | Na 5.53 SG 15.16; SOV 6.30; 66.27 processes 43.88 kg of soda (which is 40% of the magnesium ion stoichiometry). In this case, 67.88 k of basic magnesium carbonate of average mass composition is formed,%: 0.19; 13.73; Ca — 0.18; Na 1.87; Cl 0.82; S0 3.65; HgO 42.03 and purified chenitic uterine solution of average mass composition,%: K 4.21; 1.68; Ca 0.04; Na 7.03; SG 15,13; 50 6.10; . 65.81. And 946.5 kg.

This solution dissolves 440 to an ore of average mass composition,%: K 7.84; Mg 5.07; Ca 1.42; Na 12.88; SG 24.70; S0; 26.21; but. 13.63; HgO 8.25. In this case, 970.5 kg of a saturated chenitic solution of an average mass composition is formed,%: K 6.09; Mg 2.60; Ca 0.02; Na 5.36; SG 14.55; S0; 9.31; 62.07, 251 kg salvoval average mass composition,%: K 5.27; Mg 3.74; 1.62; Na 19.00; SG 31.21; so; 23.30; but. 6.99; 8.87 and 165 kg of clay-salt sludge of average mass composition,%:

4 .. 2

, 22; Mg + - 2.21; Ca 1.02 Na 13.53; SG 22.61; SO; 14.26; but. 25.47; HjO 16.91. During crystallization of uterine shenitovogo solution

154 kg of chenite of average mass composition are formed,%: K 18.38; 5.69; ta 0.12; Na 1.60; C1 2.87; so 44.81; HjO 26.53 and 816.5 kg of circulatory uterine ienite

a solution of average mass composition,%: K 4,49; Mg 2.19; Ca 0.06; Na 5.71; C1 .15, 1 I; S0; 5.79; 66.65. To the circulating uterine shenite solution, 154 kg of promodine are added, after washing the basic magnesium carbonate of medium weight composition,%: K 0.20; Mg 0.09; Ca 0.02; 0.38; SG 0.79; 80 0.38; N.O. 98.14.

Similarly, tests are performed with

38, 50, 60, 62% soda.

The test results are shown in the table.

As follows from the data in the table, the use of the proposed method in comparison with the known ones makes it possible to decrease the potassium loss by 1.7-2.9 times, by 1.5-12 times, about 1 time, to reduce the loss of i sulphate ion, by 1, 5 times to increase the rate of excretion of chenite and at the same time to significantly improve the particle size distribution of the chenite obtained.

Claims (1)

Invention Formula A method for isolating chenite from polymineral potash ores, including dissolving the ore in a working stock solution, separating sludge, crystallizing chenite by cooling the resulting chenite solution, separating chenite, and returning the mother liquor to the ore dissolution stage, characterized in that sulphate ions, as well as improving granite size of shenite and the rate of its release, the mother liquor is treated with soda in an amount of 40-60% of the magnesium ion stoichiometry before returning to the ore dissolution stage , the resulting basic magnesium carbonate is separated, washed with water and the washings are mixed with the circulating mother liquor. The amount of processed ore, kg440 440 440 440 440 440 Potassium loss (with water supply and waste, wt.% 2.9 2.5 1.7 1.0 1.0 1.0 1.0 Loss of sulfate ion (with water and waste), wt.% 4.3 2.8 2.5 0.8 0.86 6.9 Time span shenit, min 45 40 31 22 35 49 Gr anulometry composition of yenite,% fraction, mm Editor N. Gunko Compiled by E. Kornienko Tehred A. Kravchuk Order 201/26 Circulation 456 Subscription VNIIPI USSR State Committee for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab ,, d.4 / 5 Production and printing company, Uzhgorod, Projecto st., 4 Proofreader M.Samborsk