SU944663A1 - Collector for flotation of clayey-carbonate slimes from potassium containing ores - Google Patents

Description

(5) COLLECTOR FOR FLOTATION OF CLINIC-CARBONATE SLUDGE FROM KALI-CONTAINING ORES

The invention relates to the enrichment of water-soluble ores containing clay-carbonate sludges, such as potash. When such ores are enriched for the optimal liver flotation of the useful mineral (in the case of potassium ore, sylvina), preliminary ossification of the ore by the flotation method is carried out. For example, acrylamide polymers 11 are used to collect sludge bodies. A disadvantage of polymeric reagents of this type under the conditions of processing salt ores is the globulization of their macromolecules: coagulating them, especially in the presence of water-soluble salts. The sharp decrease in the activity of reagents, caused by the globalization of macromolecules of polymers, occurs under the conditions of processing of water-soluble ores, such as, for example, potash ores. In this case, the processing processes proceed in the medium of saturated solutions of chlorides and sulphates of potassium, sodium, magnesium. A decrease in the activity of the reactants necessitates an increase in their consumption, which adversely affects the economic performance indicators. A copolymer of acrylamide and ot, p-derivatives of acrylic acid, used as flocculant 2 is also known. The purpose of the invention is to recover a reagent that is highly effective in flotation of clay-carbonate sludges in the presence of water-soluble salts. This goal is achieved by using copolymers of acrylamide and 3 fi, (b-derivatives of acrylic acid of the formula -СI — х.О where RX, is an aliphatic saturated or unsaturated carbohydrate radical of normal or iso-design with the number of carbon atoms from 2 to 3; Rn is a saturated aliphatic or unsaturated hydrocarbon radicals of normal and isostructures with the number of carbon atoms from 3 to lA; X wt; at 60-90 masd., The molecular weight of the copolymer used is in the order of 1-10-6-10. Due to the branching of the molecules d, -substituted p acrylic acid derivatives, macromolecules of the obtained copolymers have less flexibility than macromolecules of known polymer reagents (in particular polyacrylamide or copolymers of acrylamide with acrylic or methacrylamide with methacrylic acid) .This prevents their globalization and increases the activity of the reagent, especially when media with high salt concentration. The copolymer was tested as a collector reagent for flotation of clay-carbonate sludge in the course of sylvin Ites As an example, a series of experiments were carried out that were carried out with sylvinite ore (the content of potassium chloride is 26% by weight, the insoluble residue is 3.6–3.7% by weight). Flotation conditions: the ore content in the mother liquor is 30 wt .; contact time with sludge collector 1 min; sludge flotation time 2 min; contact time with the modifying agent — sodium carboxymethylcellulose (CMC) —2 min; contact time with a potassium chloride collector (a mixture of hydrochloric octadecylamine and pine oil, consumption of 80 and 8 g per ton of ore) for 1 minute; flotation time sylvite 2 min. For comparison, the results of experiments with polyacrylamide currently used as a collector of sludge, as well as with a copolymer of acrylamide with acrylic acid, are presented. As can be seen from the obtained data, the use of the proposed acrylamide and branched acid copolymer of acrylic for the sludge flotation allows, under conditions of optimal recovery of potassium chloride in the concentrate (), to reduce the consumption of self-reagent by half and a copolymer of acrylamide with acrylic acid. At the same time, the consumption of the CMC modifier reagent is reduced. In addition, the selectivity of the process increases, i.e. extraction of potassium chloride in the slurry product is reduced by 0.2-0.5. Thus, the use of acrylamide copolymer and branched acrylic acid acids as a slurry collector enhances the recovery of the insoluble residue in the slurry product. Due to this, an improvement in the flotation of potassium chloride in the sylvinic flotation cycle is achieved, the necessary consumption of sludge modifier - CMC is reduced, and the loss of potassium chloride with the slurry product is also reduced. The invention claims the use of a copolymer of acrylamide and oti-derivatives of acrylic acid of the formula -g U Ai t / n it /. where R is an aliphatic saturated or unsaturated hydrocarbon radical of normal and iso-construction with the number of carbon atoms from 2 to 3; Rt is an aliphatic saturated or unsaturated hydrocarbon radical with a normal and iso-structure with the number of carbon atoms from 3 to X wt.%; 60-90 wt., as a collector for flotation of clay-carbonate sludge from potassium ores.

59Н6636

Sources of information, the USSR and abroad. M., NIITEKHIM, taken into account during the examination of 1975 p. .

1. A. Zhelnin. Reagents, application - see Vf 2620658/03, which is applied during the flotation of potassium salts in S cl. B 03 D 3 / 0b 1978.

2. USSR author's certificate

Claims (1)

The claims The use of a copolymer of acrylamide and cl i p> derivatives of acrylic acid of the formula h <! I CH _g - sn - and Cnm about saturated where R ₁ * 2 - an aliphatic or unsaturated hydrocarbon radical of normal and isostructure with the number of carbon atoms from 2 to 3; - aliphatic saturated or unsaturated hydrocarbon radical from normal and isostructure with the number of carbon atoms from 3 to 14; May 10-40.?; 6O-9O May.?, X = Y = as a collector for flotation of clay-carbonate sludge from potassium-containing ores.