SU1627257A1 - Method of flotating fluoritic ores - Google Patents

Abstract

This invention relates to the beneficiation of minerals. The goal is to increase the extraction of fluorite in the concentrate. The ore in the form of pulp is conditioned with modifiers, then the fat-acid collector is introduced and the additional collector is floated and fluorite is added. As an additional collector, 2- (0,0-dialkyl-dithiophosphato) acetic acid of the formula RO is introduced. Nox where R is -C2Hs; - SzNg: iso-SzNu. iso-GiHgj-CsHii; iZo-SbNts. The proposed reagents allow partially (50%) replacement of expensive and scarce oleic acid produced from food raw materials with newly synthesized 2- (0,0-dialkyldithiophosphato) acetic acid reagents with various radicals. The extraction of fluorite in the concentrate is increased by 1.88-5.08%. fe

Description

This invention relates to the beneficiation of minerals, namely the flotation of ores.

The aim of the invention is to increase the recovery of fluorite in the concentrate.

The method is carried out as follows.

The ore in the form of pulp is conditioned with modifiers, the fat-acid collector is introduced, and the additional collector is floated and fluorite is added. As an additional collector, 2- (0,0-dialkyl-dithiophosphato) acetic acid is added.

edg formulas

W X5-SNGS OH

where R is -C2H5; - SzNu; iso-CzH7; -C4He; iso-C4Ne; -CsHn; iso-CsHn.

Synthesis of the proposed substances. For the synthesis of 2- {0,0-dialkyl dithiophosphato) acetic acids and their isomeric forms with the radicals-C2Hs; - SzN, iso-CsNu, -SoNe, iso-SlNd, CgHn, iso-CsHn, potassium 0,0-dialkyl-dithiophosphates and chloroacetic acid are used.

Potassium dithiophosphate is synthesized by reacting alcohols with l-grainy phosphorus and subsequent neutralization of dithiophosphoric acids with excess potash.

A mixture consisting of 20.0 g of the potassium salt of diisoamyldithiophosphoric acid (slight excess), 6.13 g of CICH2COOH. 100 ml of acetone, heated at 60 ° C for 5 minutes, then stirred overnight. The precipitate KS) is filtered off, the filter is evaporated on a rotary evaporator at 60 ° C to

cx che

VI

you ate

4J

complete removal of acetone. The oily substance that is separated out is dissolved in Lemzole, filtered, and washed in a separating funnel with distilled water acidified with hydrochloric acid (pH 1). The washed benzol solution is filtered, the benzene is evaporated in a rotary evaporator. 16.46 g of the compound KSbNif P (S1SCH2COOH (VII) is obtained. Yield 94.3%. Other six compounds are obtained in the same way:

2- (C, 0-diethyldithiophosphato) acetic acid I

2- (0,0-dipropyldithiophosphato) acetic acid II

2- (0, Odiisop tpildithiophosphato) wksu - sleep acid III

2- (0,0-dibutyl dithiophosphato) acetic acid IV

2- (0.0-diisobutyldithiophosphato) / ksus pa acid V

2- (0 0-diamyldithiophosphato) acetic acid VI

The interaction of 0,0-dialkyldithiophosphate with chloroacetic acid in acetone proceeds according to the equation:

R-0

NS-K

-Kn-Cllj-COOH- -,.

reg. N S-CHf-COOH

where R-C2H5: -C3H: iso-C3H; izo-SzNd; Senp; iso - SG) NC.

Acids I-v ll are thick oily liquids that do not distil at 11 h of pluquum at 0.1 mm from st. and a temperature level higher than 200 (C, readily soluble to ironic solvents and insoluble in water.

5 10

15

20

25

thirty

Example. The proposed reagents were tested as collectors in a 1: 1 mixture with oleic acid during the flotation of fluorite ores containing 25.5% CaF2, 2.1% CAS02, according to the following scheme and reagent mode.

The ore was crushed to 65% of a class less than 0.074 mm in the presence of, g / t: NhUF HF 150, NaHS500, AI2 (SCM) 3 200.

Then No. 2CO3 was introduced - 2000 g / t, the collector of 200 g / t conducted fluorite flotation.

The proposed reagents allow partially (50%) replacement of expensive and scarce oleic acid produced from food raw materials with newly synthesized reagents 2- (0,0-dialkyldithiophosphate) acetic acids with various radicals and increase the extraction of fluorite a concentrate by 1 , 88-5.08%.

Claims (1)

Claims The method of flotation of fluorite ores, which includes conditioning the ore in the form of pulp with modifiers, introducing fatty acid and additional collectors, introducing fluorite into the froth product, characterized in that, in order to increase the extraction of fluorite, 2- (0,0-dialkyldithiophosphate) acetic acid of the formula RO x .four S then h-sig where R is -SzN, iso-SzN, -SlNe, iso-, -OzNts, iso-CsHu.