SU1495391A1 - Electrolyzer for producing fire-damp - Google Patents

Abstract

The invention relates to the electrochemical treatment of solutions used in the enrichment processes, and makes it possible to increase the activity of the iron vitriol used as a coagulant, and thereby reduce its consumption. The cell has a housing divided by perforated electrodes, a cover, a dielectric socket for supplying a solution placed between the electrodes, and a socket for withdrawing the solution. A device for introducing a solution in the form of a chamber with a cross section decreasing downwards. The chamber is located on the lid of the electrolyzer, and the height of the chamber is 2/3 - 3/4 of the height of the electrodes. 1 hp f-ly, 1 ill., 3 tab.

Description

The invention relates to electrochemical technology and can be used in the electrochemical activation of reagent solutions, wastewater treatment in enrichment processes, dewatering and other technological processes in various industries.

The purpose of the invention is to increase the activity of iron vitriol.

The drawing shows a pre-electrolyzer.

The electrolyzer for the treatment of aqueous solution of ferrous sulfate consists of the housing 1, the electrodes: the anode 2, the cathode 3, the chamber 4, which is the device for injection of the solution, the outlet pipes 5, 6.

The electrolyzer dp of processing aqueous solution of ferrous sulfate works as follows.

The initial electrolyte entering the chamber 1 through the inlet 4, which is a current-nonconducting partition, is in: the zone of action of the anode 2 and the cathode 3, to which a constant voltage is applied. The resulting products (anolyte and catholyte) exit, respectively, through the outlet nozzles 5 and 6. A chamber with a cross section decreasing downwards helps to prevent the mixing of products of electrode reactions, increase the rate of flow of electrolyte solution at the outlet of chamber 4, and also reduce coke

with

QD

14

Vani products of reactions in the lower part of the chamber.

To substantiate the technological parameters and structural dimensions of the dividing partition, a model of the device was made on which laboratory tests were carried out. The camera is made of plexiglass, the electrodes are made of ordinary

steel, the experiments were carried out with a 15% solution of iron sulphate (X 7). The solution of vitriol was fed into the chamber at a rate that ensured its presence in the chamber during

10-30 minutes at x-current density of 200 - 800 A / m.

In the process of electrochemical treatment, the solution of ferrous sulfate is activated due to the formation of NIL anodic and cathodic reaction products, differing in chemical properties from the original electrolyte. Their subsequent use as a coagulant increases the effectiveness of iron sulfate. The efficiency of the electrochemical treatment in the proposed electrolysis cell was checked during the filtration of the apatite concentrate. Specifically, it is reflected in an increase in the filtration rate, the moisture content of the cake (Table 1), as well as a decrease in the consumption of coagulant upon reaching a predetermined dewatering rate. Data on the influence of the height of the partition on the efficiency of processing of ferrous sulfate during filtration of apatite concentrate (consumption of ferrous sulfate - 0.9 kg / t) are presented in Table. 2. The consumption of solution of ferrous sulfate, depending on the degree of narrowing of the box, is pre-styled. in tab. 3

As can be seen from the obtained data, in the proposed electrolyzer, the electrochemical treatment of the vitriol is more efficient, which allows reducing the consumption of iron sulphate by 30%, while achieving almost the same technological parameters of Phyptration.

From the obtained results it can be seen that with the electrochemical treatment in the proposed electrolyzer, the consumption of iron vitriol can be reduced from 1800 to 1200-900 g / t, i.e. 1.5-2 times.

Practical use of the proposed electrolyzer in the electrochemical treatment of ferrous sulfate in the technology of dehydration of apatite concentrate with a production volume of 5 million tons of apatite concentrate per year yields an economic effect of at least 100 thousand rubles.

Claims (2)

1. An electrolyzer for treating an aqueous solution of ferrous sulfate used as a coagulant, consisting of a body, vertically arranged perforated electrodes, a lid, a device for injecting a solution placed on the lid, and installed between the electrodes; t - lich This is due to the fact that, in order to maintain the activity of the coagulator, the device for introducing the solution is made in the form of a chamber with a cross section decreasing downwards. 2. The electrolyzer according to claim 1, wherein the height of the chamber is 2/3 - 3/4 of the height of the electrodes. Table 1 Electrolyte Ch / U Anolyte 7U / L / UH five