SU1041156A1 - Collector for flotation extraction of clayey slimes from potassium containing ores - Google Patents

Abstract

The use of a copolymer of dimethylaminoethyl methacrylate and methacrylic acid as a collector for the flotation extraction of clay slurries from raw ores. (C

Description

The invention relates to the enrichment of minerals by the flotation method and can be used in potash enterprises processing blue Levitite ores.

It is known that the high costs of deficient reagents-collectors of higher aliphatic amines during flotation are associated with the ability of silicate and carbonate clay slimes to adsorb them on their surface. In addition, sludge with adsorbed amine easily transfer to the froth product of salt flotation, reducing the quality of the concentrate. Therefore, to increase the content of KS1 in the concentrate and the elimination of the harmful effect is necessary,. fine clay sludge.

To isolate the clay slurries kOe ores, particularly potassium, is known to use as their collectors oxidized white spirit, oksietili- ²⁰ Rowan fatty acids [1].

These reagents are not effective enough. "

The process of ore flotation using PAA-polyacrylamides DA as a collector of clay slimes is known (2].

However, this reagent does not allow 'to achieve high extraction Silvin and sufficient selectivity slurry 30 flotation.

A copolymer of dimethylaminoethyl methacrylate and methacrylic acid is used, which is used as selective ion-exchange membranes, which can be used to purify and desalinate hard and sea water [3].

The purpose of the invention is to increase the extraction and selectivity of the separation of sludge and to improve the conditions for the subsequent 4θ sylvine flotation.

This goal is achieved by the fact that a copolymer of dimethylaminoethyl methacrylate (DMAEM) and methanilary OI acid (MAA) is used as a collector of clay slimes.

The specified copolymer DMAEM And the MAC can be represented by the following structural formula:

SI.

50

sn ₂ —C.S0OCH ₂ CH ₂

sn " one ch ₂ -c ~ ch ₃ one soon ch ₃

55

Copolymers containing, respectively, DMAEM and MAC, mol.% 50:50 (reagent 1) and 70:30 (reagent 2) were tested as a collector of clay slimes.

The copolymers were synthesized using dinitrilozoisobutyric acid acid (DAK) as an initiator with a concentration of 3'10 Å / l at a temperature of VNIIPI Order 7008/6

60

re reaction 70 ° C. The synthesis was carried out in an atmosphere purified from O ₂ nitrogen. The reaction medium is dimethyl sulfoxide (DMSO), the total concentration of monomers in DMSO С _m = 2.40 mol / l. The copolymers were precipitated from a solution of DMSO with a mixture of acetone and methyl ethyl ketone (1: 1) or only with acetone. Re-purification was performed by dissolving the copolymer in water and precipitating it with acetone.

This DMAEM and MAK copolymer is a white crystalline substance, well soluble in water. In the process of extraction of clay slimes, a copolymer of dimethylaminoethyl methacrylate and methacrylic acid is used in the form of 0.5-0.25% solutions,

Example, Float sylvinite ore saturated in KC1 and NaC1 solution. The ratio T: W = 1: 2.5. The pulp without the reagent was stirred for 1 min, then a copolymer of dimethylamino-ethylmethacrylate and methacrylic acid was introduced and stirred for 1 min. Slurry flotation ends in 3-4 minutes.

After the introduction of the KC1 hydrochloric acid octadecylamine collector, the sylvine is extracted from the pulp that is thus slimeless.

The results of flotation of sylvite ore using PAA and Reagent 1 and 2 show that a copolymer of dimethylaminoethyl methacrylate and methacrylic acid is a good collector for flotation of sylvinite ore sludge. When it is used, the extraction of clay sludge into the slurry product is increased by 10-24%, and the content of KS1 in them is reduced by 2-3 times. This contributes to the effectiveness of the subsequent sylvine flotation. The extraction of sylvite into concentrate increases from 0.8 to 3.4%, with an increase in the content of KC1 in the concentrate to 3.5%. In addition, the use of this copolymer completely eliminates the process of depression of the un-bottled slurry product before sylvinic flotation.

Claims (1)

Thus, the advantage of this reagent is to increase the extraction of sludge into the slurry product, to increase the recovery of KC1 in the concentrate and its quality, as well as to the possibility of conducting sylvinate flotation without prior depression of the non-bottled slurry product. The use of this copolymer of dimethylaminoethyl methacrylate and methacrylic acid leads to a significant increase in the technological indicators of the process of enrichment of potash ORE.