SU1003872A1 - Method of thickening clayey-salt suspensions - Google Patents

Description

(54) METHOD OF CONDENSION OF CLAY-SALT SUSPENSIONS

The invention relates to methods for thickening mineral processing products by adding reagents - structure-forming agents and can be used in wet enrichment processes, mainly for thickening clayey sludges and regenerating circulating water in the potash industry. There is a method of thickening the base salt suspensions, which consists in using hydrolyzed polyacrylonitrile (GIPAN) in the presence of calcium chloride (in the amount of GIPAN 50 g / ton solids; CaCl j 0.5 g / l suspension). When treating the suspension by sequential administration of HIPAN and CaCl j, the separation effect occurs 30 seconds after the end of the movement. The average sedimentation rate of solid particles is 1.9 m / h til. The closest to the proposed method to the technical essence and the achieved result is a method of thickening clay-salt suspensions, including the introduction of polyacrylamide and organic additives - formaldehyde and urea in the following ratio of components, parts by weight; Polyacrylamide 0.9-1.1 Formaldehyde 0.8-1.4 Urea 0.8-1.5 The rate of thickening of the suspension with the addition of 3.0 mg of flocculant / g of clay reaches 12.5 cm / min 2. A disadvantage of the known method of thickening is high consumption of reagents. The purpose of the invention is to reduce the consumption of reagents while maintaining a high rate of condensation. The goal is achieved by using a polyacrylamide and organic additive — a product of synthesis of fatty alcohols or ethylene glycol with ethylene oxide in the ratio (3-7): according to the method of thickening the clay-salt suspensions: 1. Increasing the ratio of polyacrylamide: organic additive more than 7 leads to a decrease in sludge compaction, i.e. to an increase in the ratio of W: T in a condensed sediment.

A decrease in the ratio of polyacrylamide: an organic additive less than 3 is not important, since the rate of condensation increases slightly, and an expensive surfactant is overrun.

As the product of the synthesis of fatty alcohols with ethylene oxide using the drug OS - 20 structural formula

CnHjH - (OCHj - CHj) m H, where n is 16-18; m 10, and in jca4ecTBe the product of the synthesis of ethylene glycol with ethylene oxide-PEG - 115 structural

formulas;

CH3-0- (CH3-CH, -0) n H CHj-O- (CHj-CHi-0) n I,

where P1 - Pg 114

Example. Laboratory studies are carried out on a clay-salt suspension according to a clay-salt suspension of potash production after separation of the salt slurry with a solids content of 20.% Particle size 0.05 mm

PAA

PEG-115

PAA

PEG-115

PAA

PEG-P5

PAA PEG-115

Hardly separating the salt sludge from the Chlorovinyl PO sulphate factory. Content, solids 20%. 1 ml of a 0.25% polyacrylamide solution and 1 ml of a 0.08% organic solution are added to 260 ml of the suspension. The ratio of polyextra: an organic additive is 3: 1. The resulting mixture is thoroughly mixed and the rate is measured.

The table presents data on the speed of slushine glshgast-salt-suspension from the ratio in flocculant polyacrylamide and organic Supplement.

The implementation of the proposed method for thickening clay-salt suspensions allows saving the floc-ntB reagents, i.e. reduce their consumption by 31-35 times.

2.7

7.5

1: 1: 1

4.0

1.85

ten

3.2

6.22 2.8 7.45

0.034

0.070

7.553.0 0.023

PAA PEG-115

PAA

Same og-20

PAA

OS-20

PAA

OS-20

PAA

OS-20

PAA

Claims (2)

OS-20 Formula of the invention 1. Method of thickening glial salt suspensions / including the introduction of polyacrytamide and an organic additive, characterized in that the product of reducing the consumption of reagents while maintaining the same concentration rate, as the organic additive use the product of synthesis of fatty alcohols or ethylene glycol with oxide ethylene. Table continuation 0.070 3.4 7.56 0.070 4.1 1.90 YU 6.96 3.1 . 7 2.7 7.52 2.9 7.53 0.070 33 7.53 0.070 2. The method according to claim 1, of which is that polnacrylamide and the product of the synthesis of fatty alcohols or ethylene glycol with ethylene oxide are introduced in the ratio (3-7) -. 1 Sources of information taken into account during the examination 1. USSR author's certificate No. 719660, cl. On 01 D 21/00, 1978. 2. USSR author's certificate number 647255, cl. C 02 F 1/52, 1977.