SU1577845A1 - Method of flotation of fluorite-bearing ores - Google Patents

Abstract

The invention relates to the beneficiation of minerals and can be used in the flotation of fluorite-containing ores. The purpose of the invention is to increase the extraction of fluorite in the concentrate due to increased flotation activity and selectivity of the collector. For this, the slurry is treated in an alkaline medium with liquid glass. Then conditioning is carried out with an oxyhydryl collector and fluorite is released into the frothy product. As an oxyhydryl collector, a by-product of detergent production was obtained, which was obtained during the purification of synthetic fatty acids of the C 17-C 21 fraction, composition, wt.%: Uncleanable substances 4.6-7.0

dicarboxylic acids 15-19

isocarboxylic acids 40-43

normal acids (RCOOH) else. The proposed collector is obtained by reacting a concentrate of iso-, keto-, di-, and unsaturated carboxylic acids released during the purification of synthetic fatty acids of the C 17-C 27 fraction with diethanolamine in the presence of an alkaline catalyst (or without it) at a temperature of 150-170 ° WITH. The use of the proposed collector in the flotation of fluorite-containing ores makes it possible to increase the extraction of fluorite in the concentrate by 3-8%.

Description

The invention relates to the beneficiation of minerals and can be used in the flotation of fluorite-containing ores.

The aim of the invention is to increase the extraction of fluorite in the concentrate due to the increased flotation activity and selectivity of the collector.

According to the method of flotation of fluorite ores, including pre-conditioning of the pulp in an alkaline medium in the presence of liquid glass and a collector, a by-product of detergent production obtained during the purification of synthetic fatty acids of fraction С | 7-Сг composition, wt. %:

Non-Removable Substances 4.6-7.0 Dicarboxylic Acids15-19

Isocarboxylic acids 40-43 Acids of normal structure Else

This compound contains a significant amount of dicarboxylic, hydroxy- and keto-branched acids, the mass fraction of the basic substance is up to 54%. The compound is non-toxic, is a soapy substance of yellowish-gray color, well soluble in water.

The described reagent is obtained by reacting a concentrate of iso-, keto-, di-, and unsaturated carboxylic acids (or bi- and semi-functional), liberated during the purification of synthetic fatty acids of the C-C21 fraction, with diethanolamine in the presence of

H -vj

oo

4 SL

alkaline catalyst (or without it) at 150-170 ° C. The by-product of the production of detergents obtained during the purification of synthetic fatty acids is an acid in the fractional composition from Ci to Czi and has the following physicochemical properties:

Acid number, mg KOH / g 230-255 Essential- -15,5-18

Carbonyl- -21-36

Iodine number, g J2 / 100 g25-35

Example. The ore was studied, containing,%: CaF2 41.5; СОСОз 1.68; SiO2 41.5. The experiments were carried out according to the following scheme: grinding 70% of the class 1 micron; basic fluorite flotation; control flotation with tailings; four cleanup concentrate main flotation.

Experiments were conducted in an open cycle. The middlings of scrubbing and the Control Flotation concentrate were combined into a total middling.

Pea rental mode: grinding - soda (medium controller) 1000 g / t; The main fluorite flotation is liquid glass 200 g / t. A by-product of the production of detergents, obtained during the purification of synthetic fatty acids of the Cu-C2i fraction (dosage in the form of a 1% solution), - variable flow: cleaning operation - liquid glass 80 g / t; cleaning operation - liquid glass 60 g / t.

Used as a collector, a by-product of detergent production, obtained during the purification of synthetic fatty acids of the C-Cb fraction, exhibits good collective properties, selectively affecting fluorite. At a flow rate of 350-450 g / t, the extraction of fluorite into a concentrate is 85.3-92.3%, respectively, when the fluorite content in the concentrate is 95.09-96.49%. Increasing the flow rate of the collector to 500 g / t violates the selection: despite

increasing the extraction of fluorite in the concentrate to 95.5% of the content of fluorite in the concentrate is reduced to 94.66%.

Experiments on the prototype were performed on the same ore with optimal consumption of technical fatty acid collector (TFA) -200 g / t.

The use of a Cp-Czi fraction in the amount of 350-450 g / t as a collector of a by-product for the production of detergents obtained during the purification of synthetic fatty acids makes it possible to increase the extraction of fluorite into the concentrate by 2.3% compared to the prototype in the fluorite content is 96.49% and by 9.3% in the case of obtaining a concentrate with a fluorite content of 95.09%.

Claims (1)

Invention Formula The method of flotation of fluorite-containing 5 ORE - which includes pretreatment of the pulp in an alkaline medium with liquid glass, subsequent conditioning with an oxyhydric collector and release of fluorite into the froth product, characterized in that, in order to increase the extraction of fluorite, into the concentrate as an oxyhydrogen collector are introduced. a by-product of the production of detergents, obtained during the purification of synthetic fatty acids of the fraction Cr-Cr composition, wt.% Non-milled substances 4,6-7,0 5 Dicarboxylic acids15-19 Isocarboxylic acids 40-43 Acid normal Building Rest