RU2123893C1 - Collector for flotation of silicate and carbonate minerals from potassium-containing ores - Google Patents

Abstract

FIELD: mineral concentration; may be used at potassium industry enterprises for preliminary flotation of water-insoluble minerals from potassium ores. SUBSTANCE: compound of quaternary hydrazine salt with respective chemical formula is used as collector for ore flotation. Salt was used in the form of aqueous emulsion. Application "Hidrazeksa-2" (commercial name) offers the following advantages over the used collectors at present time: reduced harmful effect on environment due to use of flotation agent less soluble in water and its lower consumption. In addition, application of quaternary hydrazine salt results in increasing of separation selectivity. EFFECT: higher efficiency. 1 tbl

Description

 The present invention relates to the field of mineral processing, in particular to the flotation of water-insoluble minerals, the previous flotation of potassium chloride from potash ore, and can be used in enterprises of the potash industry, as well as in the beneficiation of ores containing silicate and carbonate minerals.

 Known methods for beneficiating potassium ores by flotation, where oxidized white spirit, ethoxylated alcohols, amines, phenols of carboxylic acids are used as a collector of water-insoluble silicate and carbonate minerals (1, p. 94), methanol / 2 /.

Due to the high surface activity, fine dispersion silicate and carbonate minerals, so-called minerals NO, very actively adsorb salts of aliphatic amines vysokomollekulyarnyh C ₁₆ -C ₂₀ used as a collector for flotation of potassium chloride, which leads to the cessation of flotation of sylvite / 1 p.60; 3. p. 65 and 75 /. Therefore, during the flotation concentration of potassium ores with an admixture of minerals N.O. necessarily carry out a preliminary de-slamming of ores. The most effective method of decontamination is flotation of minerals N.O., the so-called slurry flotation / 3, p. 78 /. The more selective is the selection of minerals N.O. in this process, the smaller the loss of potassium chloride with the foam product, and therefore, the higher the extraction of KCl during flotation enrichment.

 The disadvantage of the above collectors is the low selectivity of the sludge flotation process, the high consumption of reagents, which has a harmful effect on the environment.

 The closest in technical essence and the achieved result is a method with the use of coolant reagents, which was widely used in potash enterprises of the Urals / 3, p. 78 /. The disadvantages of this method are the high consumption of fatty acids (1,500 g / t N.O. in ore), insufficient selectivity for the allocation of N.O. and harmful effects on the environment. The reagent OZHK is a nonionic surfactant, highly soluble in water / 4, p. 307 /. In factories, its content in the liquid phase of sludge discharged to the sludge storage facility is (2.5 - 10.8) mg / l.

 The technical result of the invention is to improve the selectivity of the allocation N.O. from ore being enriched and in reducing the harmful effects on the environment through the use of a flotation reagent, less soluble in water and with less chemical resistance.

где
n = 12 - 14; X^- - анион кислоты, например Cl^-.The result is achieved in that in the proposed method for isolating N.O. flotation is carried out using a cationic reagent (technical name "Hydrazex-2") - a Quaternary hydrazinium salt of the formula:

Where
n is 12-14; X ^- is an acid anion, for example, Cl ^- .

 The proposed reagent belongs to the class of compounds of the Quaternary salt of hydrazinium. It is known for its use as a reagent for the intensification of oil production / 5 /. But the use of the quaternary hydrazinium salt as a collector for the flotation of silicate and carbonate minerals from potassium ores is unknown.

The average molecular weight of the reagent is 278.5. The content of the main substance (74-92)%. The main impurity is chloralcan. Solubility in water at 20 ^o C - 14.3%, at 95 ^o C - 19.6%. The reagent "Hydrazex-2" is introduced into the flotation process in the form of a 2% aqueous emulsion.

 The method is illustrated by the following examples.

Example 1. A sample of sylvinite ore with a particle size of less than 0.8 mm, containing 32.2 g of potassium chloride and 4 g of clay-water-insoluble clay (N.O.), was placed in the chamber of a laboratory mechanical flotation machine and filled with 250 g saturated with potassium chloride and sodium with a solution containing 4 mg of foaming agent NK-82. 1.2 ml of a 0.25% aqueous solution of polyacrylamide was added to the suspension, and after 30c stirring, 0.19 ml of a 2% solution of Hydrazex-2. After stirring for 1 min, air was introduced into the suspension and sludge flotation was performed with the release of minerals N.O. into the foam product (sludge). When the air was turned off, 1 ml of a 1% aqueous emulsion of amine C ₁₆ -C ₂₀ in the form of hydrochloric acid salt was introduced into the chamber product and mixed for 1 min. Then air was introduced, the level was adjusted with brine and potassium chloride was flotated, and potassium chloride (concentrate) was removed into the foam product. There were tails in the chamber product. 3.4 g of sludge was obtained in the foam product of the first stage, 31.6 g of concentrate in the second stage and 61.0 g of tailings in the chamber product. Extraction of minerals N.O. in the 1st stage of flotation - 57.0%. KCl in the second stage is 98.0%. The main results of the fleet experience are presented in the table.

Example 2. A portion of sylvinite ore with a particle size of less than 0.8 mm, containing 32.2 g of potassium chloride and 4 g of minerals N.O. placed in the chamber of a laboratory mechanical machine and poured 250 g of a solution saturated with potassium and sodium chlorides containing 4 mg of NK-82 foaming agent. 1.2 ml of a 0.25% aqueous solution of polyacrylamide was introduced into the suspension and after 30c stirring 0.38 ml of a 2% aqueous solution of OLC. After stirring for 1 min, air was introduced into the suspension and sludge flotation was carried out with the release of N.O. (sludge). When the air was turned off, 1 ml of a 1% aqueous emulsion of amine C ₁₆ -C ₂₀ in the form of hydrochloric acid salt was introduced into the chamber product and mixed for 1 min. Then air was introduced, the level in the chamber was adjusted with saline and potassium chloride was flotated. Potassium chloride (concentrate) was discharged into the foam product. In the foamy product of the first stage, 3.3 g of sludge was obtained, of the second stage - 35.5 g of a concentrate of potassium chloride and in the chamber product 61.2 g of tailings. Extraction of minerals N.O. in the 1st stage of flotation - 55%, KCl in the second stage - 97.9%. The main results of the fleet experience are presented in the table.

Thus, the use of quaternary hydrazinium salt as a collector for the flotation of silicate and carbonate minerals from potassium ores allows:
- increase the activity of N.O. in the slurry product;
- reduce flotation reagent consumption by 2 times;
- reduce the environmental impact of potassium chloride production.

 Sources of information.

 1. Titkov S.N., Mamedov A.I., Soloviev E.I. Enrichment of potash ores. -M. : Nedra, 1982, 216s.

 2. USSR author's certificate N 1713654, cl. B 03 D 1/008, 1992, B. N 7.

 3. Teterina NN Potash, potassium and magnesium salts. / Izv. Universities, Mining Journal. Ural Mountain Review, 1995, N 6, pp. 60-89.

 4. Surfactants. Reference / Abramzon A.A. et al., L .: Chemistry, 1979, 376 p.

 5. Drozdetsky A.G., Radushev A.V. Multifunctional reagent for the intensification of oil production. Oil industry, - 1995 N 11, p. 44-45.

Claims (1)

The use of the quaternary hydrazinium salt of the General formula

where n = 12 - 14,
X ^- - anion of the acid, for example, Cl ^- ,
as a collector in the flotation of silicate and carbonate minerals from potassium-containing ores.

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