CN113249570A

CN113249570A - Ore pulp electrolysis continuous leaching device

Info

Publication number: CN113249570A
Application number: CN202110658275.4A
Authority: CN
Inventors: 柯柏友
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-06-04
Filing date: 2021-06-04
Publication date: 2021-08-13

Abstract

The invention discloses an ore pulp electrolysis continuous leaching device, and relates to the field of hydrometallurgy equipment. Including square electrolysis trough main part, anode region, cathode zone, toper tank bottom, anode region and cathode zone separate with the infiltration diaphragm, and cathode zone link up with the toper tank bottom, and there is spiral material collecting device at the toper tank bottom, and porous aerating device is equipped with to anode region bottom, and electrolysis trough cathode region and anode region's upper portion side all are equipped with the feed inlet, and the opposite flank all is equipped with the overflow mouth, and the overflow pipe is connected to the overflow mouth, and a plurality of electrolysis troughs pass through the overflow pipe and connect trapezoidally according to the height in proper order, form the electrolysis system that multistage electrolysis trough is established ties. And the ore pulp enters a first-stage electrolytic cell after being mixed, is electrolyzed in series through a plurality of electrolytic cells and is discharged from an overflow port of a tail-stage electrolytic cell. And the metal mud in the cathode zone falls into a collecting zone at the bottom of the conical tank, and the spiral material collecting device sends the cathode mud into a pipeline to obtain the metal mud through solid-liquid separation. The electrolyte is returned to the electrolysis system. The device is convenient for collecting the metal cathode mud and realizes continuous operation.

Description

Ore pulp electrolysis continuous leaching device

Technical Field

The invention discloses an ore pulp electrolysis continuous leaching device, and relates to the field of hydrometallurgy equipment.

Background

The pulp electrolysis process is a new hydrometallurgical technology. At present, the pulp electrolysis is widely researched in the fields of processing chalcopyrite, galena, complex silver concentrate, bismuth ore, multi-metal sulfide ore and the like, wherein breakthrough is made in the aspect of processing the bismuth ore, the complex silver concentrate and gold concentrate, and the industrial production is realized successively. The special advantages of high efficiency and environmental protection enable the pulp electrolysis to have wide application prospect.

The principle of ore pulp electrolysis is as follows: the method is characterized in that ground minerals are pulped and then added into an anode area of an electrolytic cell, proper electrolyte is selected according to different minerals, a pulp electrolytic cell separates the anode area from a cathode area by a permeable diaphragm, metal minerals are oxidized and leached in the anode area, metal ions enter the cathode area through the diaphragm and are separated out on a cathode, and the separation from other components is realized. Traditional ore pulp electrolysis leaching tank is single independent, only one-level leaches, for example, chinese patent with application number 201420031494.5 discloses an ore pulp electrolysis electrode device, including the ore pulp electrolysis tank, be equipped with anode assembly and the cathode assembly of mutual interval arrangement in the ore pulp electrolysis tank, anode assembly directly locates in the electrolysis tank, cathode assembly locates in the diaphragm frame that sets up in the ore pulp electrolysis tank, anode assembly and cathode assembly include a plurality of slice electrodes that hang on the contact tube through rotating device respectively, this ore pulp electrolysis electrode device's leaching only has one-level, the valuable element of leaching can only be extracted in the diaphragm frame in the ore pulp electrolysis tank, so very troublesome, and inefficiency, the electrolysis tank can not continuous operation. For another example, the chinese utility model of application No. 201721259370.2 discloses an ore pulp electrolysis device, which comprises a tank body, an electrolysis electrode group, a stirring shaft and a stirring paddle, wherein a negative conductive copper bus bar, a positive conductive copper bus bar and a diaphragm bag basket frame are fixed in the tank body; the electrolytic electrode group comprises a cathode fixed on the negative conductive copper bus bar, an anode fixed on the positive conductive copper bus bar and a diaphragm bag sleeved outside the cathode. Similarly, leached valuable metals are stored in a diaphragm frame in the ore pulp electrolytic cell, and if the valuable metals are to be taken out, cathode mud can be shoveled down by taking out a cathode plate or the metal mud can be poured out from a diaphragm bag, so that firstly, the operation is troublesome, the labor intensity of workers is high, the efficiency is low, and the electrolytic cell can not work continuously.

Disclosure of Invention

Aiming at the defects and problems in the prior art, the invention discloses an ore pulp electrolysis continuous leaching device. The device is convenient for collecting the metal cathode mud, realizes continuous operation, and has large capacity and high production efficiency.

In order to achieve the purpose, the invention adopts the following technical scheme:

an ore pulp electrolysis continuous leaching device comprises a square electrolytic cell main body, an anode region, a cathode region and a conical cell bottom, wherein a negative conductive copper bar and a positive conductive copper bar are fixed on the cell body. The anode area and the cathode area are separated by a percolation diaphragm, the cathode area is communicated with the bottom of the conical tank, a spiral device is arranged at the bottom of the conical tank and can push out cathode metal mud, and a porous aerating device is arranged at the bottom of the anode area; the bottom of the anode area is provided with a heavy joist. The side of the upper parts of the cathode area and the anode area of the electrolytic cell is provided with a feed inlet, the opposite side is provided with an overflow port, the overflow port is connected with an overflow pipe, and the electrolytic cells are connected in a trapezoidal manner in sequence according to the height through the overflow pipe to form an electrolytic system with multistage electrolytic cells connected in series. The ore pulp enters a first-stage electrolytic cell after being mixed, is subjected to series electrolysis through a plurality of stages of electrolytic cells, is discharged from an overflow port of a last-stage electrolytic cell, is conveyed to a filter press through a pipeline, is discharged into a tailing pond after being subjected to solid-liquid separation, and returns to an electrolysis system. The metal mud in the cathode region falls into a conical tank bottom collecting region, the spiral material receiving device sends the cathode mud into a recovery pipeline, the recovery pipeline is provided with a valve control switch, the recovery pipeline is connected with a filter press, the metal mud is obtained through solid-liquid separation of the filter press, and the electrolyte returns to the cathode region electrolysis system.

Wherein the electrolytic bath is a square electrolytic bath, and the bottom of the main body is a conical bath bottom.

Wherein the bottom of the conical groove is provided with a spiral material receiving device.

Wherein the plurality of cathode regions are communicated with the conical bottom, and the metal mud electrodeposited on the cathode plate can slide into the collecting region at the bottom of the conical bottom.

Wherein the anode and cathode regions are separated by a percolation membrane.

Wherein, the bottom of the anode area is provided with a heavy joist, and a plurality of anode areas are respectively independent.

Wherein, the lower part of each anode area is provided with a porous aerating device, and an air pipeline connected with the aerating device is connected with a high pressure fan, thus realizing the aeration and the stirring of the ore pulp.

Wherein the lower part of the anode area of each anode area is provided with an anode plate clamping groove type fixing device.

Wherein, the side surfaces of the upper parts of the cathode area and the anode area of the electrolytic cell are both provided with feed inlets, and the opposite side surfaces are both provided with overflow ports.

The overflow port of the anode area is preferably an inlet from the bottom of the anode area tank, lifted to the upper part of the anode area tank body through a pipeline, overflows out and flows into the feed inlet of the anode area of the next-stage electrolytic tank through the pipeline.

Wherein a plurality of electrolytic tanks are connected in a ladder shape according to the height in turn by overflow pipes to form an electrolytic system with a plurality of electrolytic tanks connected in series.

The invention relates to an ore pulp electrolysis continuous leaching device, which is characterized in that a plurality of electrolytic tanks are connected in a ladder-shaped manner according to the height in sequence to form an electrolytic system with a plurality of electrolytic tanks connected in series. The ore pulp after size mixing enters a first-stage electrolytic cell, is subjected to series electrolysis through a plurality of stages of electrolytic cells, is discharged from an overflow port of a last-stage electrolytic cell, is sent to a filter press through a pipeline, is subjected to solid-liquid separation through the filter press, tailings are discharged into a tailing pond, and the electrolyte returns to an electrolysis system. The metal mud in the cathode zone falls into a conical tank bottom collecting zone, the spiral material receiving device sends the cathode mud into a recovery pipeline, the recovery pipeline is provided with a valve control switch, the recovery pipeline is connected with a filter press, the metal mud is obtained through solid-liquid separation of the filter press, and the electrolyte returns to an electrolysis system. The ore pulp electrolysis device is convenient to use the diaphragm for electrolysis, reduces the operation and maintenance of the electrode plate, realizes continuous operation, improves the efficiency of production and equipment, has a simple structure, is convenient to operate, and has wide application prospect.

Drawings

FIG. 1 is a schematic sectional view (front view) of the present invention

FIG. 2 is a schematic sectional view (side view) of the present invention

FIG. 3 is a schematic view of the structure of the present invention (in a plan view)

In the figure: 1-electrolytic tank body, 2-anode plate, 3-cathode plate, 4-anode region, 5-cathode region, 6-percolation diaphragm, 7-cathode metal mud conical gathering region, 8-porous aerating device, 9-spiral discharger, 10-ore pulp inlet, 11-ore pulp overflow port, 12-anode region tank body joist, 13-cathode electrolyte inlet, 14-cathode electrolyte overflow port, 15-anode conductive copper bar and 16-cathode conductive copper bar.

Detailed Description

For the understanding of those skilled in the art, the following description is further described with reference to the embodiments and the drawings, but the embodiments of the present invention are not limited thereto.

As shown in figures 1, 2 and 3, the ore pulp electrolysis continuous leaching device comprises a square electrolytic cell main body, an anode region, a cathode region and a conical cell bottom, wherein a positive and negative conductive copper bar is fixed on the cell body. The anode area and the cathode area are separated by a percolation diaphragm, the cathode area is communicated with the bottom of the conical tank, a spiral device is arranged at the bottom of the conical tank and can push out metal mud, and a porous aerating device is arranged at the bottom of the anode area; the bottom of the anode area is provided with a heavy joist. The side surfaces of the upper parts of the cathode area and the anode area of the electrolytic cells are provided with feed inlets, the opposite side surfaces are provided with overflow ports, the overflow ports are connected with overflow pipes, and the electrolytic cells are connected in a trapezoidal manner in sequence according to the height through the overflow pipes to form an electrolytic system with multiple stages of electrolytic cells connected in series. And after pulp mixing, the ore pulp enters a first electrolytic cell, is subjected to series electrolysis through a plurality of electrolytic cells, is discharged from an overflow port of a last electrolytic cell, is conveyed into a filter press through a pipeline, is subjected to solid-liquid separation through the filter press, and is discharged into a tailing pond, and the electrolyte returns to an electrolysis system. The metal mud in the cathode zone falls into a conical tank bottom collecting zone, the spiral material receiving device sends the cathode mud into a recovery pipeline, the recovery pipeline is provided with a valve control switch, the recovery pipeline is connected with a filter press, the metal mud is obtained through solid-liquid separation of the filter press, and the electrolyte returns to the electrolytic cathode zone system.

The electrolytic leaching tank is a square body, the tank body is made of polypropylene plastics, and a square steel framework is additionally arranged for reinforcement. The external dimension of the single groove body is preferably as follows: length, width, height 1700mm 2800 mm.

As shown in fig. 3, a negative conductive copper bar 16 and a positive conductive copper bar 15 are fixed on the upper surface of the tank body. The cathode stainless steel plate is communicated with the cathode conductive copper bar, and the anode titanium metal plate is communicated with the anode conductive copper bar. Forming an electrowinning circuit.

Wherein the percolation diaphragm is made of acid-resistant filter cloth with a proper thickness and separates to generate a cathode area and an anode area. When the electrolysis operation is carried out, the ore pulp of the anode area is blocked by the percolation diaphragm to enter the cathode area, metal ions ionized by oxidation in the anode area under the action of an electric field penetrate through the diaphragm to flow to the clean cathode area, and are deposited on the cathode to realize electrodeposition and precipitation.

The bottom of the electrolytic cell main body is a conical cell bottom, and a spiral material receiving device is arranged at the bottom of the conical cell bottom. The plurality of cathode areas are communicated with the conical bottom, and the metal sludge accumulated on the cathode plate by electrolysis slides into the collecting area at the bottom of the conical bottom. The spiral material receiving device sends the cathode mud into a recovery pipeline to enter a frame type filter press, metal mud is obtained through solid-liquid separation of the filter press, and the electrolyte returns to the electrolytic cathode area system.

The bottom of the anode area of the electrolytic cell is provided with a plurality of heavy joists which are fixed on the bottom edge Yang of the conical cell, and the anode areas are respectively the anode areas corresponding to the next stage of electrolytic cell and are connected through overflow pipelines to form a series-connected electrolytic system.

As shown in fig. 1 and 3, the electrolysis electrode group includes a cathode, an anode, and a cathode from left to right. Preferred plate size: the length of the cathode plate is 1600mm 1700mm, and the length of the anode plate is 1600 mm.

In a preferred embodiment of the invention, the cathode is made of a flat 316 stainless steel plate, the anode is made of a flat titanium metal plate, and the surface of the titanium metal plate is coated with a ruthenium oxide or iridium oxide coating which can effectively prevent corrosion and prolong the service life of the pulp electrolysis device.

Wherein the center of the lower part of each anode area is provided with a porous aerating device which strongly aerates the two sides of the anode plate with a plurality of pores to play the roles of oxygenating and stirring the ore pulp.

The lower part of the anode area is provided with an anode plate clamping groove type fixing device which can prevent the electrode plate from shaking and swinging during inflation.

The gas pipeline that aerating device connects is connected with high pressure positive blower, can realize aerifing and stirring the ore pulp, guarantees that the mineral granule is the suspended state. The compressed air system also comprises a valve for adjusting the air flow, and the air flow can be adjusted according to the actual demand. Besides the valve and the gas transmission pipeline, the compressed air system also comprises an air compressor, an air storage tank, a filter and a gas transmission pipeline, and the compressed air system belongs to mature technical content in the field, so the specific connection relationship of each component is not repeated.

Preferably: in order to ensure that ore pulp particles in the anode area are in a suspension state, the ore pulp is subjected to superfine grinding to minus 350-400 meshes and a certain amount of over-oxidant is added before the ore pulp enters electrolysis. The purpose of adding the over-oxidizing agent is to help oxidize the sulfide minerals and facilitate the conversion of the metal minerals into metal ions; and in turn, facilitates the maintenance of the mineral particles in suspension in the slurry.

As shown in figure 2, the preferred overflow port of the anode area is an inlet from the bottom of the anode area tank, is lifted to the upper part of the anode area tank body through a pipeline and overflows to a feed inlet of the anode area of the next electrolytic tank through the pipeline, and the arrangement is favorable for preventing ore pulp from settling, and can ensure that mineral particles are in a uniformly suspended state under the action of porous aerated stirring and over-oxidizing agents. The normal electrolytic deposition is ensured under the state without stirring.

As shown in figure 3, the side surfaces of the upper parts of the cathode area and the plurality of anode areas of the electrolytic cell are provided with feed inlets, and the opposite side surfaces are provided with overflow outlets. The feed inlet is 100mm to 150mm away from the top of the electrolytic leaching tank, the overflow port is 250mm to 300mm away from the top of the electrolytic leaching tank, and the ore pulp flows into the next stage tank through the overflow pipe after overflowing the overflow port. And discharging from an overflow port of the last-stage electrolytic tank, conveying into a filter press through a pipeline, performing solid-liquid separation through the filter press, discharging tailings into a tailing pond, and returning the electrolyte to an electrolysis system.

The electrolytic tanks are sequentially connected in a trapezoidal mode according to height through overflow pipes, the 1-level electrolytic tank is 350mm to 450mm higher than the 2-level electrolytic tank, the 2-level electrolytic tank is 350mm to 450mm higher than the 3-level electrolytic tank, the trapezoidal connection is formed by pushing in the example, a 6-8-level series ore pulp electrolytic system is formed, and continuous automatic operation of ore pulp electrolytic leaching, electrodeposition precipitation and metal cathode mud gathering is achieved.

Wherein the electrolytic voltage is controlled to be 2.5-3.5V, the current density on the anode plate is controlled to be 100-200A/m 2, and the electrolysis and leaching time is controlled to be 4-6 hours.

The ore pulp electrolysis device is convenient to use the diaphragm for electrolysis, reduces the operation and maintenance of the electrode plate, realizes continuous operation, improves the efficiency of production and equipment, has a simple structure, is convenient to operate, and has wide application prospect.

The above embodiments are merely illustrative, and not restrictive, and those skilled in the relevant art can make various changes and modifications without departing from the spirit and scope of the invention, and therefore all equivalent technical solutions also belong to the scope of the invention, and the scope of the invention is defined by the claims.

Claims

1. The invention discloses an ore pulp electrolysis continuous leaching device, and relates to the field of hydrometallurgy equipment. The device comprises a square electrolytic tank main body, an anode region, a cathode region and a conical tank bottom, wherein a negative conductive copper bar and a positive conductive copper bar are fixed on the tank body. The anode area and the cathode area are separated by a percolation diaphragm, the cathode area is communicated with the bottom of the conical tank, a spiral device is arranged at the bottom of the conical tank to push out metal mud, and a porous aerating device is arranged at the bottom of the anode area; the bottom of the anode area is provided with a heavy joist. The side of the upper parts of the cathode area and the anode area of the electrolytic cell is provided with a feed inlet, the opposite side is provided with an overflow port, the overflow port is connected with an overflow pipe, and the electrolytic cells are connected in a trapezoidal manner in sequence according to the height through the overflow pipe to form an electrolytic system with multistage electrolytic cells connected in series. And the ore pulp enters a first-stage electrolytic cell after being mixed, is subjected to series electrolysis through a plurality of electrolytic cells, and is discharged from an overflow port of a last-stage electrolytic cell. After solid-liquid separation, the tailings are discharged into a tailing pond, and the electrolyte returns to an electrolysis system. And the metal mud in the cathode zone falls into a collecting zone at the bottom of the conical tank, and the spiral material collecting device conveys the cathode mud into a discharge pipeline to obtain the metal mud through solid-liquid separation. The electrolyte is returned to the electrolysis system.

2. The continuous leaching apparatus for pulp electrolysis as claimed in claim 1, wherein: the electrolytic tank is a square electrolytic tank, and the bottom of the electrolytic tank is a conical tank bottom.

3. The continuous leaching apparatus for pulp electrolysis as claimed in claim 1, wherein: the bottom of the conical groove is provided with a spiral material receiving device.

4. The continuous leaching apparatus for pulp electrolysis as claimed in claim 1, wherein: the cathode region is communicated with the bottom of the conical groove.

5. The continuous leaching apparatus for pulp electrolysis as claimed in claim 1, wherein: the bottom of each anode area is provided with a porous aerating device, and an air pipeline connected with the aerating device is connected with a high-pressure fan, so that the ore pulp can be aerated and stirred without additionally arranging a stirring device.

6. The continuous leaching apparatus for pulp electrolysis as claimed in claim 1, wherein: the lower part of the anode area is provided with an anode plate fixing device.

7. The continuous leaching apparatus for pulp electrolysis as claimed in claim 1, wherein: the side surfaces of the upper parts of the cathode area and the anode areas of the electrolytic cell are provided with feed inlets, and the opposite side surfaces are provided with overflow ports.

8. The continuous leaching apparatus for pulp electrolysis as claimed in claim 1, wherein: the cathode region is connected with the conical bottom and communicated with the conical bottom, and the plurality of anode regions are respectively independent.

9. The continuous leaching apparatus for pulp electrolysis as claimed in claim 1, wherein: the overflow port of the anode area is an inlet from the bottom of the anode area tank and is lifted to the upper part of the anode area tank through a pipeline to overflow.