SU1426638A1 - Method of foam separation - Google Patents

Abstract

The invention relates to the enrichment of minerals, in particular to flotation beneficiation methods, and allows for an increase in tehnol. foam separation performance by increasing the foam carrying capacity. The feedstock is conditioned with reagents, the foam layer is prepared by introducing gas and a frother into the pulp in a flotation machine, the feedstock is fed to the foam and the separation products are removed. Gas is introduced into the pulp in the form of bubbles of equal diameter, created using pneumohydraulic aerators, perforated chambers with calibrated orifices, and a system of calibration capillaries. The ratio of the volume of the foam to the volume of the liquid in this foam is 3–8, and the maximum output of the m-HL of the neutral particles of the confluent threshold is reached. msh f-ly .-% -

Description

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

The purpose of the invention is to increase the technological parameters and reduce the consumption of reagents.

According to the method of foam separation, which includes conditioning the raw material with reagents, preparing the foam layer by introducing gas and a frother into the pulp in the flotation machine, feeding the raw material to the foam and removing the separation products, the gas is introduced into the pulp in the form of bubbles of one diameter and set foam layer with brevity from 3 to 8.

Example 1 In a laboratory separator, pennite separation of calcite and quartz (particle size of minerals from 0.5 to 1.5 mm) was carried out according to the proposed and known methods, Quartz oGfabatalshal with cationic collector AHI1-2 and fuel oil, and calcite with sodium oleate and fuel oil. Air bubbles in the proposed method were set by identical capillaries with an outlet opening with a diameter of 0.2 mm. Aeration according to a known method was carried out using rubber tubular dispersants and ceteris paribus.

From the data obtained it can be seen that the yield of mineral particles through the overflow threshold in the proposed method is much higher and that the maximum is observed at a lower concentration of the frother. With a different diameter of the outlet openings of the capillaries, the maximum output of the mineral particles is at a lower or higher concentration of the frother, depending on whether this diameter is smaller or larger.

In all cases, when the multiplicity of the foam layer is not less than 3 and not more than 8, we obtain the maximum yield of mineral

particles through the overflow threshold. I

Based on the obtained experimental data, it can be seen that it is possible to reduce the consumption of collectors, without degrading the process performance.

Example 2 A method was also evaluated using hydrophilized mineral particles. Mineral particles of quartz and calcite with a particle size of 0.5 to 1.5 mm were depressed with liquid glass and were determined through the drain threshold. The speed of the foam through the drain threshold was set

five

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five

five

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In a known method, the removal of particles of quartz and calcite was 10%. Under the same conditions, when implementing the proposed method, the removal of mineral particles was less than 3%.

This can be explained by the fact that the water content of the foam layer in the proposed method increases more sharply with the depth of immersion in the foam than in the known one.

Experiments were carried out on model glass beads with a particle size of 1 mm. Half of these balls were treated with liquid glass, and the other half - with ANP-2 and fuel oil. When the concentration of the foaming agent OPSB is 10 mg / l and the diameter of the outlet openings of the capillaries is 0.1 mm, the proposed method gives almost 100% separation of the model balls into hydrophobized and hydrophilized,

Under the same conditions, the known method yielded a recovery of 93% with a content of hydrophobized balls of 90%.

Under industrial conditions, puzzles of the same size can be created, for example, with the help of pneumohydraulic aerators operating in specially selected modes, perforated chambers with calibrated orifices, as well as with a system of calibrated capillaries,

Thus, the application of the proposed method allows to significantly improve the technological performance of foam separation, in addition, significantly reduce the consumption of expensive foaming agent and, accordingly, other reagents.

Claims (1)

1. A method of foam separation, which includes conditioning the raw material with reagents, preliminarily preparing the foam layer by introducing a frother and gas into the pulp, supplying the conditioned raw material to the foam layer and removing the separation products, characterized in that, in order to improve the technological performance of foam separation by increasing the foam carrying capacity, the gas in the pulp is introduced in the form of bubbles of equal size. 2, the method according to claim 1, characterized in that the ratio of the volume of foam to the volume of liquid in this foam is from 3 to 8.