SU1373446A1 - Method of flotational dressing of phosphate ores - Google Patents

Abstract

This invention relates to mineral processing methods. The purpose of the invention is to increase the grinding of phosphorus pentoxide from ores with variable grinding. The feedstock is crushed and the content of the useful component (PC) and the size of the crushed raw materials are monitored. The pulp is treated with a modifier and N-acylated amino acids (AAA) or their alkaline salts and fatty acids (FA) or their alkaline salts are introduced sequentially along the flotation front in the ratio Q, (- d), where Q and Q are the amount of AAA, respectively or their alkaline salts and FA or their alkaline salts, P (-d) - the content of the particle size below the specified, K - proportionality coefficient, taking into account the change in the surface of the interaction of thin classes after the introduction of AAK or their alkalis, K 1. The reagent AAK or their alkaline salts are served in an amount proportional to the content in the feedstock PC. At the first flotation stage, with the introduction of the AAK reagent, the latter more actively floats coarse grains, which contributes to the extraction of larger PC classes into the froth product. In the second stage of flotation, with the introduction of the liquid crystal, the collector of the latter is sorbed on the surface and floc defects, increasing their hydrophobicity. At the same time, efficient extraction of large and small PC classes into the foam product is achieved. 1 hp f-ly. c (L 00 00 4 Od

Description

The invention relates to methods for the beneficiation of minerals, in particular, to the field of flotation enrichment of phosphate ores, with variable grinding.

The aim of the invention is to increase the recovery of phosphorus pentoxide from ores with variable grinding.

According to the method of flotation enrichment of phosphate, for example, apatite-containing ores, including ore preparation, control of the content of the useful component and nutritional size of flotation, pulp treatment with a modifier and flotation using a combination of collectors of N-acylated amino acids or their alkaline salts, collectors of N -acyl- baths of amino acids, or their alkaline salts and fatty acids, or their alkaline salts are served sequentially along the flotation front and in the ratio

iL 1 Qi KP (-iy

where Q is the supplied amount of N-acylated acids or their alkali salts, g / t; QJ - supplied amount of fatty acids or their alkaline salts, g / t; p (-d) - controlled content

size class below the specified; K- - coefficient taking into account

reduction of the surface of the interaction of fine classes after treatment with N-acylated amino acids or their alkaline salts. In this case, N-acylated amino acids or Vix alkali salts are served in an amount proportional to the content of the useful component in the original ore.

The essence of the method lies in the fact that reagents of the type of N-acylated amino acids (LAC) more actively float coarse grains and the less active fine-grained (slime) part of the useful component. This distribution of efficacy results from the selective flocculation of the fine-grained fraction after AAA treatment. The formation of floccules occurs in such a way that the most hydrophobized surfaces of individual particles are turned inward, and the more hydrated surfaces

form its outer shell. Such a structure of flocculation reduces the efficiency of interaction of its surface.

with a bubble of air. Therefore, according to the proposed method, at the first flotation stage, the AAK reagent is supplied, which flocculates the sludge and facilitates extraction into the froth product.

larger classes of useful component.

The fatty acid collector is then dosed along the flotation front, which is sorbed on the surface and on the defects.

flocculus, increasing their hydrophobicity. In this case, the most efficient extraction of large and small classes of the useful component into the foam product is achieved.

Example. Flotation of apatiteonepheline ore according to the scheme, including the main, control and three finishing operations.

The ore was ground in a ball mill, the content of the useful component and the particle size of 0.071 mm were determined. Processed modifier (liquid glass) and filed for flotation. In the main flotation filed

a mixture of sodium salts of N-acylated acids in an amount proportional to the content of the useful component (), and the saponified mixture of fatty acids was metered into the control float

acids in an amount equal to:

, P (-0.071 mm), where, 5-0.9.

Experimental data show that the extraction of phosphorus pentoxide in the concentrate increased from 93.8 to 95.7% (27,) with a practically unchanged content.

Claims (1)

1. The method of flotation enrichment of phosphate ores, including grinding the raw material, controlling the content of the useful component and the size of the crushed raw material, processing the pulp with a modifier, introducing N-acylated amino acids or their alkaline salts, fatty acids or their alkaline salts and flotation, o in order to increase the recovery of phosphorus pentoxide from ores with variable grindability, N-acylated amino acids or their alkaline salts and fatty acids or their alkaline salts are introduced into the pulp ntu flotation ratio QI 1 Q, 2 KP (-d) where Q, is the supplied amount of N-acylated amino acids or their alkali salts; QJ, is the supplied amount of fatty acids or their alkaline salts; P (-d) - the content of the size class below the specified; K is the proportionality coefficient taking into account the change in the surface of the interaction of thin classes after the introduction of N-acylated amino acids or their alkali salts,. 2, the method according to claim 1, characterized by the fact that the N-acylated amino acids or their alkaline salts are introduced in B-15 amount, proportionality to the content of the useful component in the feedstock.