SU1510934A1 - Method of flotation concentration of coal - Google Patents

Abstract

The invention relates to the beneficiation of minerals and can be used in the beneficiation of coal. The goal is to increase the yield of concentrate and its quality. The pulp is pre-conditioned with a collector and blowing agent. In the conditioning, the product of the interaction between tall pitch and a bottoms residue from the rectification of polyethylene polyamine, taken at a ratio of from 1: 0.9 to 1: 1, is also introduced. Then flotation is carried out. The reagent is obtained by stirring for 2 hours in an autoclave at a temperature of 180–240 ° C of tall peck and cubic residue from the rectification of polyethylene polyamine. The resulting reagent contains double bonds, imine, amine and amide groups. This ensures its increased selectivity in the flotation of coal. The method compared with the known allows to increase the yield of the concentrate by 1.0-3.1% and reduce its ash content by 0.1-0.3%.

Description

The invention relates to the beneficiation of minerals and can be used in the beneficiation of coal.

The object of the invention is to increase the yield of the concentrate and its quality.

The pulp is pre-conditioned with a collector and blowing agent. In the conditioning, the product of the interaction between tall pitch and a bottoms residue from the rectification of polyethylene polyamine, taken at a ratio of from 1: 0.9 to 1: 1, is also introduced. After

conditioning during flotation results in a combustible mass of flotation.

To obtain a reagent, tall oil pitch was mixed with the bottom residue from the rectification of polyethylene polyamine in an autoclave at 180-240 0 for 2 h, cooled and used in the flotation process in the form of a solution of the desired concentration.

The reagent is more selective than that known by the presence in its composition of double bonds, imine, amine, amide groups, resulting from high temperatures;

00 4

the interaction of gall pitch and VAT residue from the rectification of polyethylene polyamine in the ratio of 1: (0.9-1).

The introduction to the pulp of the product is interdependent, when the residue from the rectification of polyethylene polyamine falls on 1 weight. h, tall pitch less than 0.9 wt.h ,, impairs the structure of flotation foam,

The use of a reagent obtained with a ratio of components, when the VAT residue of polyethylene polyamine in the reaction mixture is more than 1 weight parts, per G weight parts, also leads to a decrease in flotation rates. tall oil pitch. In this case, the decrease in flotation rates is due to the fact that the increased concentration of amine ions exerts a suppressive effect on coal particles and activates the flotation of waste rock particles, reducing the flotation selectivity. Thus, the interval (1:: 0.9) - (1: 1) is optimal.

Example 1 At the sludge of the processing plant Karagatsdinsky metallurgical plant was diluted with water. The resulting pulp at a solid to liquid ratio of 1: 4 was treated with a mixture of reagents, conditioned for 2 minutes, and the usual flotation process was carried out.

As reagents used

a mixture of kerosene and heavy oils in the ratio of 1-0,053, in the amount of 1500 g / t of the original sludge. The output of the concentrate is 57.2% at. ash content of 13.0%.

Example 2. Essential HP under conditions similar to example 1. To

0

five

five

thirty

35

40

five

During flotation, the product of interaction between tall pitch and a bottoms residue from the rectification of polyethylene polyamine in the ratio of 1: 0.7, in an amount of 5 g / t of the original spam was used. The output of the concentrate is 57.8 at ash content of 13.0.

Examples 3-5. It was carried out under conditions analogous to example 2, with the ratio of tall pitch and bottom residues from the rectification of polyethylene polyamine (1: 0.9) - (1: 1.0). The concentrate yield is 58.8-60.9% with an ash content of 12.9-12.7%.

one

Analysis of the research results confirmed the optimality of the ratio of tall pitch and still residue from the rectification of polyethylene polyamine (1: 0.9) - (1: 1).

Thus, the use of the method will increase the yield of concentrate by 1.0-3.1% and reduce its ash content by 0.1-0.3%.

F o rmula of the invention

The method of flotation concentration of coal, including pre-conditioning of the pulp with the collector and blowing agent and the release of combustible mass, that is, with the aim that, in order to increase the output of the concentrate and its quality, The product of the interaction of tall pitch and VAT residue from the rectification of polyethylene polyamine, taken in a ratio of from 1.0: 0.9 to 1: 1, is introduced.

Claims (1)

Claim A method of flotation enrichment of coal, including pre-conditioning of pulp with a collector and a blowing agent and the allocation of combustible mass, characterized in that, in order to increase the yield of the concentrate and its quality, the product is further introduced into the co-conditioning of the interaction of tall pitch and distillation residue from rectification of polyethylene polyamine taken in a ratio of 1.0: 0.9 to 1: 1.