SU1227244A1 - Method of grinding materials - Google Patents

Description

The invention relates to the enrichment of minerals and can be used to carry out the grinding process before flotation of non-sulphide ores, mainly fluoropate.

The purpose of the invention is the improvement of technological indicators.

The proposed method of grinding minerals in a ball mill involves the continuous supply of ore and water to the mill, continuous unloading of the crushed material and subsequent flotation, with the modifier, which is a fluorine production waste containing sodium fluoride, sodium carbonate, bicarbonate, being fully introduced into the mill. sodium, sodium sulfate.

Qualitative-quantitative composition of the modifier, g / l

Sodium fluoride 3.6 Sodium carbonate (sodium carbonate) 22.26 Sodium bicarbonate (sodium bicarbonate) 21.84 Sodium sulfate 94.43 The effective effect of the modifier to help achieve this goal is confirmed by the experimental procedures given below.

Example. The ore containing 45.0% of fluorite is crushed, in a ball mill, to a particle size of 75% of a class of 0.074 mm.

Simultaneously with the ore, the mill is supplied with water and the modifier — waste fluorine production — variable costs.

The ground product is sent for flotation.

Flotation lead according to the following scheme and mode.

1.Basic of fluorite flotation with feed into it, g / t

Soda600

Liquid glass200

Aluminum sulfate 200 Oleic acid 200

2. Control flotation with the supply of oleic acid 50 g / g.

3. Industrial products flotation with soda feed 300 g / t and oleic acid 50 g / t.

4.Fig perechistka concentrate with: liquid glass and aluminum sulphate.

five

0

Table 1 shows technological parameters of flotation enrichment obtained when feeding into grinding as a modifier of wastes of production of fluorine salts. one.

The experiments were performed in an open cycle with the production of a coarse (draft) fluorite concentrate (without refining).

As can be seen from the table. 1, with the modifier consumption during the grinding process equal to 1400-2400 g / t of ore, the maximum technological indicators of the subsequent fluorite flotation were obtained.

So, as the fluorite content in the rough concentrate is 82.41-83.77%, when extracting fluorite into a concentrate is 94.6-95.4%.

A further increase in the consumption of the modifier leads to a significant decrease in the extraction of the useful component in the concentrate (from 95.4% with the consumption of the modifier 2400 g / t to 92.2% with the consumption of 3500 g / t).

Reducing the consumption of modifier (800 g / t) leads to a decrease in the quality of the concentrate (from 82.41% to 81.16%).

In tab. 2 shows the results of flotation in a closed loop at the cost of the proposed modifier in quantities that give the best technological indicators of flotation in the open cycle.

Simultaneously with the experiments in a closed cycle by the proposed method, experiments on the same ore were carried out using the known technology. In tab. 3 shows the comparative showings of the proposed and known methods. As can be seen from the table. 3, the technological parameters of the proposed method are improved in comparison with the indicators by a known method. Thus, the extraction of fluorite in concentrate increased by 2/7% (from 94.6% to 97, -3%), and the content by 4.39% (from 93.14% to 97.53%).

The positive effect of the feed to grinding as a modifier

Waste production of fluorine in the subsequent flotation process can be explained by eliminating the harmful effects of secondary sludge formed during the grinding process, which is achieved due to the peptizing properties of the constituent parts of the modifier, in particular sodium carbonate, sodium bicarbonate, etc.

Table 1

1227244

  Continued table. one

500 Draft fluorite concentrate 49.6 84.56 92.2

Control concentrate 4.0 40.29 3.5

Tails 46.4 4.18 4, 3 Ore 100.0 45.50 100 100.0

7000 Draft fluorite-. high concentrate 18.4 76.39 31.8

Control table 2

Proposed 45.6

Famous 45.6

Table 3

97.53 97.3 93.14 94.6

Claims (2)

1. METHOD FOR GRINDING MATERIALS, mainly ores, including the continuous supply of material to the mill, water, continuous discharge of the crushed material and its subsequent flotation, characterized in that, in order to improve technological parameters, a waste modifier is introduced into the mill in full. production of fluorine salts containing sodium fluoride, sodium carbonate, sodium bicarbonate, sodium sulfate. 2. The method of pop. 1 characterized in that the modifier is introduced in an amount of 1400-2400 g per 1 ton of material.