BG1010U1 - Flow line for polymetal ores flotation - Google Patents

Abstract

The flow line is used for flotation of polymetal ores, such as sulphide, oxide, carbonate, and sulphate ores. It ensures a higher level of flotation selection of the valuable components. The flow line comprises, in accordance with the technological process, an ore crushing module (1), a milling and classification module (2), and a flotation module (3), which are interconnected by materials transportation means. The flow line comprises also an electrolyzer (9), the electrolyte being water or water solution of salts. The electrolyzer (9) is supplied with a membrane (11) separating the anode space and the cathode space, which are connected in an open cycle with the milling and classification module (2) and in a closed cycle with the flotation module (3). The connection of the electrolyzer with the milling and classification module (2) and with the flotation module (3) is with a possibility of feeding anolyte to each of the mills (7, 8) and catholyte to the flotation module (3), or feeding catholyte to each of the mills (7, 8) and anolyte to the flotation module (3). The electrolyzer (9) is supplied with a system for circulating water supply (27) from the flotation module (3).

Description

Technical field

The utility model relates to a flow technological line for the flotation of polymetallic ores such as sulphide, oxide, carbonate, sulphate ores.

BACKGROUND OF THE INVENTION

RU 2100090 discloses a flow technological line for the flotation of gold-containing ores, which includes, in the course of the technological process, an ore crushing unit, a grinding and classification module, a gravitational enrichment module and / or a flotation module and a gravity module for finishing the ore concentrates connected to each other by means of transport of materials.

This well-known technological line does not provide a high degree of selective separation of the valuable components contained in the ore.

The technical nature of the utility model

The task, which is solved with the utility model, is to create a production line for the enrichment of polymetallic ores, which provides a higher degree of flotation selection of valuable components.

This task is accomplished by a flow-through processing line for polymetallic ores, which includes a sequentially placed ore crushing unit, a milling and classification module consisting of mills and classifiers, and a flotation module interconnected with means of transportation of the materials. According to the utility model, an electrolyzer filled with a diaphragm separating the anode and cathode spaces is connected to the grinding and classification module and the flotation module, which are connected in an open cycle with the grinding and classification module and in a closed cycle with the flotation module. The connection of the electrolyzer to the milling and classification module and the flotation module is capable of feeding an anolyte to each of the mills and a catholyte to the flotation module or supplying a catholyte to each of the mills and an anolyte to the flotation module.

The electrolyzer is equipped with a system for the return supply of water from the flotation module. The advantages of the flow-line according to the utility model are expressed in the following. The inclusion of an electrolytic cell in the technological line for flotation of polymetallic ores ensures the processing of the material in the process of grinding and flotation with products from the electrolysis of water - anolyte and catholyte, which activate, respectively, depress a mineral. As a result, the flotation extraction of minerals is increased without the need for the use of reagents activators and depressors or their amount is minimized. With the content of precious metals, and in particular gold in the ore, its extraction rate increases, since treatment with anolyte provides the presence of active oxygen, which accelerates the destruction of the sulfide matrix and the release of gold.

Explanation of the annexed figures

Figure 1 is a flowchart of an exemplary production line for the enrichment of polymetallic ores.

Examples of implementation of the utility model

The one shown in FIG. 1 is a circuit diagram of an exemplary production line for the enrichment of polymetallic ores includes: crushing module 1, grinding and classification module 2, flotation module 3 and electrolyzer 9 interconnected by means of material transport.

The crushing module 1 includes a crusher for bulk, medium and fine crushing 4, 5 and 6, respectively.

The grinding and classification module 2 consists of two ball mills 7 and 8, provided with an inlet water pipeline 25 and connected via belt conveyors 29 and 29 'to feed the sieve fraction from the crusher for fine crushing 6 to the ball inlets mills 7 and 8. The outputs of the ball mills 7 and 8 are connected in a closed loop with a hydrocyclone (not shown in the figure).

The flotation module 3 includes a flotation machine for basic flotation 15, a flotation machine for control flotation 16, and a flotation machine for flotation flotation 17.

The flotation machine for basic flotation 15 is connected to the outputs of ball mills 7 and 8 through the outlet of the hydrocyclone overflow (not shown in the figure) and pipeline 28.

The flow path according to the utility model also includes an electrolyzer 9 representing a rectangular vessel in which the anode 10 and the cathode 12 are arranged. The anode and cathode spaces are separated by a diaphragm 11. The connection of the electrolyzer 9 with the milling module 2 and the flotation module supplying the anolyte to each of the mills 7 and 8 and the catholyte to the flotation module or the anolyte to the flotation module and catholyte to each of the mills. For this purpose, the anode space is connected to the inlets of the ball mills 7 and 8 by means of an anolyte exhaust pipe 18, a first tap 19, a connecting pipe 20 and a distribution pipe 30 in series along the flow, and to the flotation module 3 via the anolyte exhaust pipe. 18, a diversion tube 24 provided with a first valve 13, a second tap 22, and a pipe 26. The cathode space of the electrolysis cell 9 is connected to the flotation module 3 by means of a catholyt exhaust pipe 21, a second tap 22 and the pipe 26 arranged in succession. and with each of the mills via a catholyte exhaust pipe 21, a discharge pipe 23 provided with a second valve 13 ', a first tap 19, a connecting pipe 20 and a distribution pipe 30. The outlet of the pipe 26 is connected to a distribution tank 14 for supplying anolyte or catholyte to the flotation machines 15, 16 and 17. The electrolyzer 9 is provided with a circulating water supply system from the flotation purification flotation machine 17, which consists of a circulation pipe 27 on which a pump (not shown in the figure) is mounted.

Using the utility model

The copper-pyrite ore crushed in the crushing unit with a copper content of 1.5%, sulfur 35% and gold 3 g / t is fed to the ball mills 7 and 8. Through the circulation pipe 27 of the water supply system, the anode and the cathode space of the cell is filled with water, followed by electrolysis of water at a voltage of 9 V, a current density of 6 mA / cm ² and a duration of 3 min. The pH of the solution in the anode space from neutral becomes 5-6, and in the cathode space from neutral yields values 10-11. The resulting anolyte is fed to each of the mills via the anolyte exhaust pipe 18, the first tap 19, the connecting tube 20 and the distribution pipe 30, with the first valve 13 closed, the first tap 19 open to the connecting tube 20 and closed to the diversion pipe 24. The amount of anolyte is about 30% of the amount of liquid phase in the mills. After milling the material in anolyte medium, the overflow from the ball mills 7 and 8 is fed to the hydrocyclone (not shown in the figure) for classification, the sands from which are returned to the ball mills 7 and 8 and the overflow of the hydrocyclone through the pipeline 28 is fed into the flotation mill. basic flotation machine 15.

The catholyte is fed to the flotation machines 15,16 and 17 in the course of the flow through the catholyte exhaust pipe 21, the pipe 26 and the distribution tank 14 with the second valve 13 'closed and the second valve 22 open to the catholic outlet pipe 21. From the distribution tank 14 50% of the received catholyte is fed to the flotation machine for basic flotation 15, 30% to the flotation machine for control flotation 16 and 20% to the flotation machine for purification flotation 17. Copper-pyrite flotation selection with xanthogen collector is carried out and without the use of lime for depression pyrite.

By treating the material in anolyte medium containing increased oxygen, a greater amount of electronic vacations are created in the process of grinding the material on the surface of the non-ferrous metal minerals, whereby during the flotation process the interaction activity between the collecting reagent and the mineral surface are intensified and the flotation extraction of the minerals is increased. The recovery rate of copper is 92% with a quality of copper concentrate of 18% and a gold content of concentrate of 40 g / l.

In another embodiment of the invention, oxidized lead-zinc ore with a lead content of 2.5% and zinc of 3.7% is subjected to flotation. The electrolysis of water is carried out under the conditions described above. The resulting catholyte is fed to the ball mills 7 and 8 through the catholyte exhaust pipe 21, the discharge pipe 23 with the second valve 13 'open, the connecting pipe 20 and the distribution pipe 30 with the first crane 19 open to the discharge pipe 23. The anolyte is fed to the flotation machines 15, 16 and 17 through the anolyte exhaust pipe 18, the diversion pipe 24 with the first valve open 13, the pipe 26 and the distribution tank 14 with the second tap 22 open to the diversion pipe 24.

In the treatment of the mineral surface with catholyte in the grinding process, an electronic transition between the collector (xanthate) and the mineral surface is possible, which results in the mineral surface being hydrophobic. Lead recovery was 92.4% and zinc 93.7%.

Claims (1)

Claims A flow-through processing line for the enrichment of polymetallic ores comprising a sequentially placed ore crushing unit (1), a milling and classification module (2) consisting of mills (7, 8) and classifiers, and a flotation module ( 3) connected to each other by means of material transport, characterized in that an electrolyser (9) is provided to the two modules (2 and 3), filled with a diaphragm (11) separating the anode and cathode spaces, which are connected in the open cycle with the grinding and classification module (2) and in the closed cycle with the flotation module (3), the connection of the electrolysis cell (9) with the grinding and classification module (2) and the flotation module (3) being able to supply anolyte to each of the mills (7, 8) and catholyte to the flotation module module (3) or feed of catholyte to each of the mills (7,8) and anolyte to the flotation module (3), wherein the cell (9) is provided with a system for circulating water (27) from the flotation module (3) ).