CN211394576U

CN211394576U - A device for granule material acid leaching

Info

Publication number: CN211394576U
Application number: CN201922452242.5U
Authority: CN
Inventors: 但勇; 赵林; 赵澎; 宋世杰
Original assignee: Meishan Shunying Power Battery Material Co ltd
Current assignee: Meishan Shunying Power Battery Material Co ltd
Priority date: 2019-12-30
Filing date: 2019-12-30
Publication date: 2020-09-01
Anticipated expiration: 2029-12-30

Abstract

The utility model relates to the field of non-ferrous metal hydrometallurgy, in particular to a device for acid leaching of granular materials, which comprises a reaction tank, a circulating pump, a cold-heat exchanger and a mixing device; the reaction tank is provided with a feed inlet, an oxygen inlet, a gas outlet and a leachate outlet; the leachate outlet is connected with the inlet of the circulating pump; the outlet of the circulating pump is connected with the inlet of the cold-heat exchanger; the outlet of the cold-heat exchanger is connected with the first inlet of the mixing device, and the gas outlet is connected with the second inlet of the mixing device; the outlet of the mixing device is connected with the reaction tank. The device has the advantages of integrated design, simple structure, convenient realization of the recycling of nitric acid and realization of the normal-pressure acid leaching by taking the nitric acid as an oxidant carrier.

Description

A device for granule material acid leaching

Technical Field

The utility model relates to a non ferrous metal hydrometallurgy field, concretely relates to a device for granule material acid leaching.

Background

Acid leaching (acid leaching) refers to a mineral leaching process that uses an aqueous solution of a mineral acid as a leaching agent. It is one of the most commonly used leaching methods in chemical ore dressing. In the hydrometallurgical process of nonferrous metals, the first step is how to dissolve solid raw materials into solution, then decompose and purify various elements in the solution, and how to economically and rapidly leach is a key step, which is widely applied to the nonferrous industries such as nickel, cobalt, copper and the like, for example, the leaching of minerals or alloys such as copper-cobalt white alloy, nickel-cobalt-iron alloy, copper sulfide and cobalt.

In the prior art, when the acid leaching is carried out on the granular materials such as alloy granules or sulfide, the oxygen is introduced under normal pressure to leach out the reaction, which is difficult. Two ways are generally adopted, one is to process the materials into fine powder with 100 meshes (i.e. the powder can pass through a 100-mesh screen), and leach and dissolve the materials in a closed reaction kettle at high temperature and high pressure by oxygen and adding acid.

However, it is difficult to grind many particulate materials to a fineness of 100 mesh or more (i.e., the powder can pass through a 100 mesh screen) and the cost of processing is high. When the alloy or sulfide is acid leached under normal pressure, the reaction is slow and difficult. The high temperature and high pressure reaction conditions have high requirements on equipment, and the production cost is increased.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a: aiming at the problems that the prior art needs to be ground into 100 meshes of fine powder and needs high temperature and high pressure during alloy leaching, the device for acid leaching of the granular material is provided. The device can be used for conveniently realizing the acid leaching of granular materials under the normal pressure by taking nitrate as a carrier for catalytic oxidation.

A leaching device for realizing the method, which comprises a reaction tank, a circulating pump, a cold-heat exchanger and a mixing device;

the reaction tank is provided with a feed inlet, an oxygen inlet, a gas outlet and a leachate outlet;

the leachate outlet is connected with the inlet of the circulating pump;

the outlet of the circulating pump is connected with the inlet of the cold-heat exchanger;

the outlet of the cold-heat exchanger is connected with the first inlet of the mixing device, and the gas outlet is connected with the second inlet of the mixing device;

the outlet of the mixing device is connected with the reaction tank.

By the device, the acid leaching of granular materials under normal pressure by catalytic oxidation with nitrate as a carrier can be conveniently realized.

As a preferred aspect of the present invention, the mixing device is a venturi-type injection pipe.

The venturi-type jet pipe is based on the principle that the water flow is reduced from thick to thin to increase the flow rate of the water flow, so that the water flow forms a vacuum area on the rear side of the venturi outlet. A nitrogen oxide gas inlet is connected to this region to provide a pumping action on the gas. And simultaneously spraying, mixing the solution and the gas.

As the preferred scheme of the utility model, be equipped with the sieve in the reaction tank, the sieve is used for bearing the weight of the alloy material.

The reaction tank is preferably divided into upper and lower two zones by the provision of sieve plates. The material is located reaction tank upper portion region under the support of sieve board, and solution is located the lower part region, and the great material of granule can not pass through the sieve, when avoiding exporting the leachate, and the large granule material causes the jam to the pipeline.

As a preferable scheme of the utility model, the leaching device further comprises a settling chamber, wherein the settling chamber is positioned between the leachate outlet and the circulating pump inlet.

Through setting up the deposit room for the leachate is in the deposit room, and the tiny particle material in the solution subsides, avoids a large amount of tiny particle materials to get into the circulating pump, causes wearing and tearing to the circulating pump.

As the preferred scheme of the utility model, this leaching device still includes the flushing pipe, the flushing pipe is connected the export of circulating pump with the settling chamber.

Through setting up the washing pipeline, utilize the rivers of circulating pump to wash the interior tiny particle material of settling chamber and return to the reaction tank.

As the preferred scheme of the utility model, this leaching device still includes drainage tube, drainage tube's one end is connected the export of circulating pump.

And when the concentration of the leachate meets the requirement, leading out the qualified leachate through a drainage pipeline.

As the utility model discloses an optimized scheme, the mixing arrangement export is through circulation feed liquor union coupling the reaction tank, circulation feed liquor pipe stretches into in the reaction tank, the export of circulation feed liquor pipe is located the sieve below.

Leading-in high concentration nitric acid to the sieve below through circulation feed liquor pipe for high concentration nitric acid can be more abundant with the material contact at the upwards diffusion in-process, does benefit to the reaction and goes on.

As the preferred scheme of the utility model, this leach device still includes the manometer, the manometer is connected the reaction tank.

And the pressure in the reaction tank is observed in real time by observing the pressure gauge. The pressure in the reaction tank can be controlled conveniently.

To sum up, owing to adopted above-mentioned technical scheme, the beneficial effects of the utility model are that:

1. the utility model relates to a device for granule material acid leaching, the integrated design, simple structure, convenient realization the cyclic utilization of nitric acid, realized using the ordinary pressure acid leaching of nitric acid as the oxidant carrier.

2. Use the utility model relates to a device for granule material acid leaching can realize continuous or semi-continuous operation through the valve in controlling each pipeline, and the solution that leaches concentration is qualified can directly be carried to low reaches filter equipment.

Drawings

Fig. 1 is a schematic structural diagram of the device for acid leaching of granular materials of the present invention.

Icon: 1-a reaction tank; 2-granular material; 3, a sieve plate; 4-circulating the liquid inlet pipe; 5-a feed inlet; 6-an air outlet pipeline; 7-a mixing device; 8-an exhaust duct; 9-flushing the pipeline; 10-a settling chamber; 11-a circulation pump; 12-a cold heat exchanger; 13-a drainage conduit; 14-oxygen inlet pipe; 15-pressure gauge.

Detailed Description

The present invention will be described in detail with reference to the accompanying drawings.

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention.

Example 1

In order to better realize the method, the utility model provides a leaching device for realizing the method.

As shown in fig. 1, the leaching apparatus includes a reaction tank 1, a circulation pump 11, a cold-heat exchanger 12, and a mixing device 7; the reaction tank 1 is provided with a feed inlet 5, an oxygen inlet, a gas outlet and a leachate outlet; the leachate outlet is connected with the settling chamber 10 through a leachate pipeline; the settling chamber 10 is connected with the inlet of the circulating pump 11; the outlet of the circulating pump 11 is connected with the inlet of the cold-heat exchanger 12; the outlet of the circulating pump 11 is connected with a re-pipeline 9 and a liquid discharge pipeline 13; the outlet of the cold-heat exchanger 12 is connected with the first inlet of the mixing device 7, and the gas outlet is connected with the second inlet of the mixing device 7 through a gas outlet pipeline 6; the outlet of the mixing device 7 is connected with the reaction tank 1 through a circulating liquid inlet pipe 4. The mixing device in this example is a venturi-type jet tube.

A sieve plate 3 is arranged in the reaction tank 1, and the sieve plate 3 divides the reaction tank 1 into an upper cavity and a lower cavity through a support frame; the leachate outlet is positioned in the lower cavity; the feed inlet 5 is positioned at the top of the upper cavity; the oxygen inlet pipe 14 is connected with the upper cavity; the pressure gauge 15 is connected with the upper cavity; the air outlet pipeline 6 is connected with the upper cavity; the circulating liquid inlet pipe 4 is connected to the reaction tank 1 from the top of the reaction tank 1 and extends into the reaction tank 1; the outlet of the circulating liquid inlet pipe 4 is positioned above the sieve plate 3 and close to the sieve plate 3. In use of the leaching apparatus, the granular matters 2 are fed into the reaction tank through the feed port 5. The granular material 2 is positioned above the sieve plate. The amounts of sulfuric acid and nitric acid used were calculated according to the metal content of the particulate material 2. Sulfuric acid is added and oxygen, in this case pure oxygen, is introduced through the oxygen inlet 14. Nitric acid is added. With the reaction, nitrogen oxides are generated in the upper space, and metal ions are continuously dissolved into the leaching solution. The leachate enters the settling chamber 10 through a leachate pipeline, and the particles settle under the action of gravity in the settling chamber 10. The valves of the flushing line 9 and the drainage line 13 are closed. The leachate with a small amount of particles passes through the circulation pump and enters the heat exchanger 12, and the leachate cooled by the heat exchanger 12 enters the venturi-type spray pipe. In a venturi-type ejector tube, the negative pressure in the device draws nitrogen oxides into the ejector through the outlet duct 6. The cooled leaching solution and nitrogen oxide are mixed in a Venturi type spraying pipe and enter the reaction tank 1 through a circulating liquid inlet pipe 4. Realizes the recycling of nitric acid. The outlet of the circulating liquid inlet pipe 4 is positioned in the material, and the solution flows and also plays a role in stirring the material.

After the concentration of the leachate meets the requirement, the valve between the circulating pump 11 and the cold-heat exchanger 12 can be closed, the valve of the flushing pipeline 9 is closed, and the qualified solution is discharged through the liquid discharge pipeline 13.

Gather the granule more at the deposit room 10, when needing to wash deposit room 10, close the valve between circulating pump 11 and the cold-hot exchanger 12, close the valve of fluid-discharge tube 13, open the valve of flushing pipe 9, wash the deposit room, stir the granule that will deposit, make full use of material on the one hand, on the other hand avoids the granule to cause the jam to the pipeline.

The pressure in the reaction tank is observed through the pressure gauge 15, when the pressure in the reaction tank 1 is too high, a valve of the exhaust pipeline 8 can be opened, the pressure is released, and the nitrogen oxide gas is discharged to other reaction tanks. The exhaust pipe 8 may also be connected to other reaction equipment to transport excess nitrogen oxide gas to other equipment.

The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.

Claims

1. A device for leaching granular material acid is characterized by comprising a reaction tank (1), a circulating pump (11), a cold-heat exchanger (12) and a mixing device (7);

the reaction tank (1) is provided with a feed inlet (5), an oxygen inlet, a gas outlet and a leachate outlet;

the leachate outlet is connected with the inlet of the circulating pump (11);

the outlet of the circulating pump (11) is connected with the inlet of the cold-heat exchanger (12);

the outlet of the cold-heat exchanger (12) is connected with the first inlet of the mixing device (7), and the gas outlet is connected with the second inlet of the mixing device (7);

the outlet of the mixing device is connected with the reaction tank (1).

2. The plant for the leaching of particulate material according to claim 1, characterized in that said mixing device (7) is a venturi-type sparge pipe.

3. An apparatus for the leaching of particulate material according to claim 1, wherein a sieve plate (3) is provided in the reaction tank (1).

4. An apparatus for the leaching of particulate leach solution according to claim 1, further comprising a settling chamber (10), the settling chamber (10) being located between the leach solution outlet and the inlet of the circulation pump (11).

5. Plant for the leaching of particulate leaching acid according to claim 4, further comprising a flushing pipe (9), said flushing pipe (9) connecting the outlet of said circulation pump (11) and said settling chamber (10).

6. An apparatus for the leaching of particulate material according to claim 1, further comprising a drain (13), one end of the drain (13) being connected to an outlet of the circulation pump (11).

7. An apparatus for the acid leaching of particulate material according to claim 3, wherein the outlet of the mixing device (7) is connected to the reaction tank (1) by a recycle inlet pipe (4), the recycle inlet pipe (4) extending into the reaction tank (1), the outlet of the recycle inlet pipe (4) being located below the sieve plate (3).

8. The apparatus for the acid leaching of particulate material according to claim 1, further comprising a pressure gauge (15), said pressure gauge (15) being connected to said reaction tank (1).