SU994584A1 - Method for thickening apatite concentrate and method for producing coagulant used for thickening apapatite concentrate - Google Patents

Description

The invention relates to the enrichment of minerals, the dehydration of concentrates and, in particular, the condensation of apatite concentrate.

There is a method of condensing apatite concentrate using electrochemical pulp processing in the process of thickening C1.

However, electro-processing of the pulp in full or partial volume leads to increased energy consumption, metal anodes, requires the use of electrolyzers of high productivity, and electrical treatment of the pulp, after the flotation operation, causes additional foaming, which is a negative factor.

The purpose of the invention is to accelerate the process and reduce the loss of the target product, as well as reduce energy consumption in the process of thickening apatite-J go concentrate.

This goal is achieved by the fact that according to the method of condensing apatite concentrate obtained by flotation by introducing coagulum, one of the latter uses a solution of sodium chloride containing

2-10 g / m 3 of alktini ions and 10-30 g / m of sodium hypochlorite ..

In this case, coagulant pschugiot by pre-electrolysis of the quinvine salt using a neutral anode, for example graphite, and subsequent electrolysis of the electrolyte obtained at soluble anodes, for example aluminum.

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The required concentration for coagulating the apatite concentrate is 10-30 g / sodium muhypochlorite and 2-10 g / m aluminum ions. Coagulation effect is achieved due to

 products of hydrolysis of aluminum introduced into the pulp of sufficient concentration. With the help of sodium hypochlorite, organic compounds are oxidized both on the surface of solid particles and in the pulp volume, which creates conditions for better coagulation and reduced foam stability. Example 1. Apatite concentrate obtained by flotation of the ores of the Yuksporsky Khibin deposit is subject to condensation. Electrochemical treatment of a sodium chloride solution is preliminarily conducted, passing it through a 2 kg electrolyser at a rate of 80 l / h at a current density of 0.08 A / cm in the first chamber and 0.024 A / cm in the second. The 2-stage electrochemical treatment of sodium chloride containing 2.0 mg of aluminum and 10.0 mg of sodium hypochlorite is injected into a pulp with a volume of 1 l and then settled for 10 minutes. The thickening effect is determined by the content of suspended particles in the resulting discharge, which in this case is 600-700 mg / l. By reducing the stability of the foam, the height of the foam layer is reduced to 7 cm. Electricity consumption per 1 m of pulp is 40 Wh, aluminum consumption is 2 g. Example 2. Apatite concentrate is concentrated according to example 1. The 2nd stage electrochemical The treatment according to the described method, a solution of sodium chloride, containing 10 mg of aluminum and 30 mg of sodium hypochlorite, is introduced into a 1 liter pulp. After 10 minutes of settling, the content of suspended particles in the resulting overflow is mg / L. The height of the foam layer is reduced to 5 cm. In this case, the electric power consumption in terms of 1 m 150 Wh-h, the consumption of aluminum is 10 g. aluminum anodes with a current density of 0.08 A / cm and a flow rate of 80 l / h. The treated salt solution containing 10 mg of aluminum is introduced into the pulp. After 10 minutes of settling, the content suspended in the resulting overflow is 180–200 mg / l. Due to the absence of sodium hypochlorite, the height of the foam layer is 12 cm. From the above examples, it is clear that aluminum consumption within 210 g / m ensures effective thickening of the apatite concentrate. The upper limit is eco-nominal expediency. The consumption of sodium hypochlorite within 1030 g / m reduces the stability of the foam, as a result of which the height of the foam layer decreases 1.5-2 times. The upper limit of sodium hypochlorite consumption | Also due to economic feasibility. Comparative indicators of the proposed and known methods are given in table. 1 From the table. 1, it can be seen that, with almost the same condensation effect, the power consumption per unit of the thickened pool according to the proposed method is more than 3.5 times lower compared to the known method, and the consumption of anodic aluminum decreases by more than 12 times. The height of the foam layer is reduced by about 2 times. The test results are given in B table. 2. Table 1

Electricity consumption, W Anodic aluminum consumption, Content of suspended particles in the discharge of the thickener, mg / l Height of foam layer, cm Consumption of salt, kg / t concentrate 150 550 2-10 120 10Q-700 300-800 3-7 11-14 1 5-2.0

Claims (2)

1. The method of thickening the Istatite concentrate obtained by flotation, including the introduction of aluminum-containing coagulant, that is, with the aim that, in order to accelerate Neither the process nor the reduction in the loss of the cells of the product, as a coagulant, is used a solution of sodium chloride containing 2-10 GD of aluminum ions, and 10-30 g / m of sodium hypochlorite. 2. A method of coagulant preparation, 65 (Used in the process of coagulation 7 9945848 Titovoro Electrochemical Concentrate-Sources of Information, CMM by dissolving the alkaline anode, taken into account in the examination, characterized in that / in order to reduce energy consumption, coagu-1. Gershenkop A.Sh. and others. The processing of nt is obtained by successively, ka and testing the technology of complex electrochemical treatment of the apatite-nepheline enrichment solution. sodium lorida using gra-raw Khibiny. Report KFAN USSR. Apatiphitic and aluminum anodes. 1977, p. 78-85 (prototype).