阅读说明：本技术 一种萃取分离金属的装置及组件 (Device and assembly for extracting and separating metal ) 是由 时鹏辉 郭灏 浩莹 党森 戴磊 唐梦阳 刘灿 聂文龙 张之赟 李世吉 支慧 王 于 2020-06-01 设计创作，主要内容包括：本发明属于金属回收领域,提供了一种萃取分离金属的装置及组件。该装置包括箱体以及沿箱体的长度方向依次设置的多个隔板,多个隔板将箱体分隔成依次相连的进液槽、混合槽、混流分层槽及液体收集槽,萃取剂与金属液盛装在进液槽内,在混合槽内混合形成液体流从而开始萃取,然后在混流分层槽分层,最后由液体收集槽内的上液收集室以及下液收集室分别收集,实现萃取液和萃余液的分离,达到萃取的目的。该装置组件包括多个串联在一起的萃取分离金属的装置,能够完成多级萃取过程和反萃取过程。本发明在一个装置内完成混合、分层和收集的过程,根据需求可将数个该装置串联,方便高效易操作,能够广泛的应用在金属萃取分离领域。(The invention belongs to the field of metal recovery, and provides a device and a component for extracting and separating metal. The device includes the box and a plurality of baffles that set gradually along the length direction of box, a plurality of baffles separate into consecutive feed liquor groove with the box, the mixing tank, mixed flow layering groove and liquid collecting tank, extractant and metal liquid splendid attire are in the feed liquor inslot, thereby it begins to extract to mix to form the liquid stream in the mixing tank, then in mixed flow layering groove layering, collect room and lower liquid collection room by last liquid collection in the liquid collecting tank respectively at last, realize the separation of extraction liquid and raffinate, reach the purpose of extraction. The device assembly comprises a plurality of devices for extracting and separating metals which are connected in series, and can complete a multi-stage extraction process and a back extraction process. The invention completes the processes of mixing, layering and collecting in one device, can connect a plurality of devices in series according to requirements, is convenient, efficient and easy to operate, and can be widely applied to the field of metal extraction and separation.)

1. An apparatus for extracting and separating metal, which is used for extracting metal ions from molten metal by using an extracting agent, and is characterized by comprising:

a box body and a plurality of clapboards which are arranged in sequence along the length direction of the box body,

wherein the box body is divided into a liquid inlet tank, a mixing tank, a mixed flow layering tank and a liquid collecting tank which are connected in sequence by a plurality of partition plates,

a liquid inlet partition board arranged in the liquid inlet tank divides the liquid inlet tank into two liquid inlet chambers for containing the extracting agent and the molten metal respectively,

a stirrer is arranged in the mixing tank and is used for sucking the extracting agent and the molten metal from a mixing liquid inlet at the bottom of the mixing tank into the mixing tank to be mixed into a liquid flow so as to start extraction,

a plurality of layered plates are arranged in the mixed flow layered tank to divide the mixed flow layered tank into a plurality of mixed flow splitting chambers, so that the liquid flow flowing out of the last mixed flow splitting chamber is layered to obtain two layers of layered liquid,

and an upper liquid collecting chamber and a lower liquid collecting chamber which are surrounded by a plurality of enclosing plates are arranged in the liquid collecting tank and are respectively used for collecting upper-layer layering liquid and lower-layer layering liquid.

2. The apparatus for extractive separation of metals according to claim 1, wherein:

the liquid inlet partition board is vertically arranged in the liquid inlet groove to obtain two parallel liquid inlet chambers.

3. The apparatus for extractive separation of metals according to claim 2, characterized in that:

the mixing tank is arranged above the liquid inlet tank, the bottom of the mixing tank is provided with a mixing liquid inlet, and the mixing liquid inlet is divided into two parts with the same area, which are respectively communicated with the two liquid inlet chambers, by the liquid inlet partition plate.

4. The apparatus for extractive separation of metals according to claim 1, wherein:

the four walls of the mixing tank are provided with turbulent flow plates, the stirrer comprises four blades and a blade base, and the four blades form an angle of 90 degrees with each other and are vertically arranged on the blade base.

5. The apparatus for extractive separation of metals according to claim 1, wherein:

the partition plate between the mixing tank and the mixed flow layering tank is vertically arranged and is vertical to the flow direction of the liquid flow, and the top end of the partition plate is lower than the top end of the mixing tank, so that the liquid flow flows into the mixed flow layering tank from the top end of the partition plate.

6. The apparatus for extractive separation of metals according to claim 1, wherein:

three layered plates which are distributed at unequal intervals are vertically arranged in the mixed flow layered groove along the length direction of the box body, the top end of the layered plate adjacent to the mixed groove is flush with the top end of the mixed flow layered groove, and the lower end of the layered plate is not contacted with the bottom of the mixed flow layered groove.

7. The apparatus for extractive separation of metals according to claim 6, wherein:

the two laminated plates which are not adjacent to the mixing tank are porous plates, the top ends of the porous plates are lower than the top ends of the mixed flow laminated grooves, and the bottom ends of the porous plates are not in contact with the bottom of the mixed flow laminated grooves.

8. The apparatus for extractive separation of metals according to claim 1, wherein:

wherein the top end of the shroud of the upper liquid collection chamber is lower than the top end of the liquid collection tank for flowing the upper stratified liquid into the upper liquid collection chamber,

and the enclosing plate at the bottom end of the lower liquid collecting chamber is provided with a lower liquid inflow hole for allowing the lower layered liquid to flow into the lower liquid collecting chamber.

9. The apparatus for extractive separation of metals according to claim 8, wherein:

and the lower liquid outlet pipe is provided with an external thread and ascends or descends in the lower liquid inflow hole by matching with the internal thread of the lower liquid inflow hole.

10. An apparatus assembly for the extractive separation of metals, comprising:

a plurality of devices for extracting and separating metals which are connected in series,

wherein, along the flow direction of the liquid flow, the upper liquid collecting chamber of the previous device for extracting and separating metal is communicated with one liquid inlet chamber of the next device for extracting and separating metal,

the device for extracting and separating metal is the device for extracting and separating metal as claimed in any one of claims 1-9.

Technical Field

The invention belongs to the field of metal recovery, and particularly relates to a device and a component for extracting and separating metal.

Background

Because metal elements have many similar physicochemical properties, a plurality of metals can coexist in the same liquid environment, but the purification and separation work is affected by a lot of troubles. Over the years, a great deal of research has been conducted by many researchers on the separation and purification of metals. At present, the common methods for metal separation include chemical precipitation, ion exchange, solvent extraction, adsorption, etc. Among them, the solvent extraction method is widely used in industry because of its advantages of easy control of operation conditions, good metal separation effect, high recovery rate, recyclable organic reagent, low cost, etc. However, the traditional extraction separation tank used in the solvent extraction method has the disadvantages of general mixing effect, incomplete separation, large volume and low operation elasticity, and is difficult to meet the requirement of efficiently separating metals from a solution.

Disclosure of Invention

The present invention has been made to solve the above problems, and an object of the present invention is to provide an apparatus and a module for extracting and separating metals, which can efficiently separate metals from a solution.

The invention provides a device for extracting and separating metal, which is used for extracting metal ions from molten metal by using an extracting agent and has the characteristics that: the box body is divided into a liquid inlet tank, a mixing tank, a mixed flow layering tank and a liquid collecting tank which are connected in sequence by the plurality of partition plates, the liquid inlet tank is divided into two liquid inlet chambers for containing an extracting agent and molten metal by the liquid inlet partition plate arranged in the liquid inlet tank, a stirrer is arranged in the mixing tank, the stirrer is used for pumping an extracting agent and metal liquid from a mixing liquid inlet at the bottom of the mixing tank into the mixing tank to mix to form a liquid flow to start extraction, a plurality of layered plates are arranged in the mixed flow layered tank, the mixed flow layered tank is divided into a plurality of mixed flow splitting chambers, the liquid flow flowing out from the last mixed flow splitting chamber is layered to obtain two layered liquids, an upper liquid collecting chamber and a lower liquid collecting chamber which are surrounded by a plurality of surrounding plates are arranged in the liquid collecting tank, and the upper layered liquid and the lower layered liquid are respectively collected.

The device for extracting and separating metal provided by the invention can also have the following characteristics: wherein, the liquid inlet partition board is vertically arranged in the liquid inlet groove to obtain two parallel liquid inlet chambers.

The device for extracting and separating metal provided by the invention can also have the following characteristics: wherein, the mixing tank sets up in the top of feed liquor groove, and the bottom has the mixed inlet, and this mixed inlet is divided into two parts that the area that communicates with two feed liquor rooms respectively by the feed liquor baffle equals.

The device for extracting and separating metal provided by the invention can also have the following characteristics: wherein, turbulent flow plates are arranged on the four walls of the mixing tank, the stirrer comprises four blades and a blade base, and the four blades are mutually 90 degrees and are vertically arranged on the blade base.

The device for extracting and separating metal provided by the invention can also have the following characteristics: the baffle plate between the mixing tank and the mixed flow layering tank is vertically arranged and is vertical to the flow direction of the liquid flow, and the top end of the baffle plate is lower than the top end of the mixing tank, so that the liquid flow flows into the mixed flow layering tank from the top end of the baffle plate.

The device for extracting and separating metal provided by the invention can also have the following characteristics: the top end of the layered plate adjacent to the mixing tank is flush with the top end of the mixed flow layered tank, and the lower end of the layered plate is not contacted with the bottom of the mixed flow layered tank.

The device for extracting and separating metal provided by the invention can also have the following characteristics: wherein, two layering boards that are not adjacent with the mixing tank are the perforated plate, and the top of this perforated plate is less than the top of mixed flow layering groove, and the bottom does not contact with the bottom of mixed flow layering groove.

The device for extracting and separating metal provided by the invention can also have the following characteristics: wherein the top end of the coaming of the upper liquid collecting chamber is lower than the top end of the liquid collecting tank, and is used for leading the upper layered liquid to flow into the upper liquid collecting chamber,

the enclosing plate at the bottom end of the lower liquid collecting chamber is provided with a lower liquid inflow hole which enables the lower layered liquid to flow into the lower liquid collecting chamber.

The device for extracting and separating metal provided by the invention can also have the following characteristics: wherein the lower liquid outlet pipe is arranged at the bottom end of the lower liquid collecting chamber and provided with an external thread which ascends or descends in the lower liquid inflow hole by matching with the internal thread of the lower liquid inflow hole.

The invention also provides a device component for extracting and separating metals, which is characterized by comprising: a plurality of devices for extracting and separating metals which are connected in series, wherein, along the flow direction of the liquid flow, the upper liquid collecting chamber of the former device for extracting and separating metals is communicated with one liquid inlet chamber of the latter device for extracting and separating metals.

Action and Effect of the invention

The device for extracting and separating metal provided by the invention is integrally a box body, the box body is divided into a liquid inlet tank, a mixing tank, a mixed flow layering tank and a liquid collecting tank which are sequentially connected by a plurality of partition plates, an extracting agent and metal liquid are respectively contained in two liquid inlet chambers of the liquid inlet tank, the extracting agent and the metal liquid are mixed to form liquid flow after entering the mixing tank, so that the liquid flow is extracted, then the liquid flow is layered in the mixed flow layering tank, and finally the liquid flow is respectively collected by an upper liquid collecting chamber and a lower liquid collecting chamber in the liquid collecting tank, so that the extraction liquid and raffinate are separated, and the purpose of extraction is achieved.

The liquid inlet partition board in the liquid inlet tank separates the liquid inlet tank into two liquid inlet chambers for holding extractant and metal liquid separately, and can regulate the mixing ratio of the extractant and the metal liquid conveniently.

The extracting agent and the metal liquid are pumped into the mixing tank from the mixing liquid inlet by the stirrer arranged in the mixing tank to be mixed into a liquid flow so as to start extraction. The agitator promotes the production of vortex, and the suction effect that the vortex brought can be with liquid from the feed liquor room through mixing the inlet suction mixing tank for two kinds of liquid just begin to mix getting into mixing the inlet, are favorable to the mixture of extractant and metal liquid, make in the better entering extractant of metal ion, improve extraction efficiency.

The mixed flow layering tank is divided into a plurality of mixed flow dividing chambers by a plurality of layering plates arranged in the mixed flow layering tank, the layering and flow stabilizing of the liquid flow passing through the mixed flow dividing chambers are completed in the layering process, the layering plates can reduce the flow speed of the liquid, the layering process can be completed fully, and the liquid flow flowing out of the last mixing chamber is layered to obtain upper layering liquid and a lower layer.

The upper liquid collecting chamber and the lower liquid collecting chamber respectively collect upper layering liquid and lower layering liquid to complete the extraction process, so that the extraction liquid and the raffinate are separated, the metal ions are enriched, and the extraction purpose is achieved.

This device gathers feed liquor groove, mixing tank, mixed flow layering groove and liquid collecting vat together, and mutual intercommunication compresses the volume of extraction equipment greatly, accomplishes the whole processes of mixing, layering and collection in a device, and convenient high-efficient easy operation, the allotment of the mixed liquid in this device simultaneously is convenient, and the sample research is convenient. The device for extracting and separating metal can be widely applied to the field of metal extraction and separation, including scientific research, industrial heavy metal wastewater treatment, hydrometallurgy purification and the like. Meanwhile, a box body with a proper size can be selected according to actual requirements, and a proper number of mixing and shunting chambers can be arranged according to actual requirements, so that the volume can be saved, the power consumption can be saved, and the energy can be saved.

The device assembly for extracting and separating metal provided by the invention comprises a plurality of devices for extracting and separating metal which are connected in series, an upper liquid collecting chamber or a lower liquid collecting chamber of the previous device can be communicated with a liquid inlet chamber of the next device and connected in series, and the other liquid inlet chamber is filled with a new extractant or other back-extracting agents, so that after the devices are sequentially connected in series, a secondary extraction process and a back-extracting process can be completed in one device assembly. In practical application, the device can be arranged according to requirements, a plurality of devices can be connected in series to form an extraction functional area, or a plurality of devices can be connected in series to form a back extraction functional area, a plurality of devices can be used in series to complete complex extraction and back extraction projects, and the volume, the power consumption and the energy can be saved. And a plurality of devices are connected in series, and the replacement and maintenance of a single device are simple, so that the maintenance is convenient, and a large amount of maintenance cost is saved.

Drawings

FIG. 1 is a schematic view of the overall configuration of an apparatus for extractive separation of metals according to example 1 of the present invention;

FIG. 2 is a left side view of the apparatus for extraction separation of metals in example 1 of the present invention;

FIG. 3 is a schematic view of the structure of a stirrer in example 1 of the present invention;

FIG. 4 is a front view of an apparatus for the extractive separation of metals in example 1 of the present invention;

FIG. 5 is a plan view of an apparatus for the extractive separation of metals in example 1 of the present invention; and

FIG. 6 is a right side view of the apparatus for extraction separation of metals in example 1 of the present invention.

Detailed Description

In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the device for extracting and separating the metal of the invention is specifically described below with reference to the embodiment and the attached drawings.

In the embodiment of the present invention, the orientation is the same as that in fig. 1, that is, the upper, lower, left, right, front, and back in fig. 1 are the upper, lower, left, right, front, and back in the following embodiments.

< example 1>

This embodiment describes the apparatus 100 for extracting and separating metals in detail.

Fig. 1 is a schematic structural view of an apparatus for extraction separation of metals according to embodiment 1 of the present invention, and fig. 2 is a left side view of the apparatus for extraction separation of metals according to embodiment 1 of the present invention.

As shown in fig. 1 and 2, the apparatus 100 for extracting and separating metal is used for extracting metal ions from molten metal by using an extracting agent, and is a rectangular box body with an open upper part. The box body consists of a lower bottom plate 1, a left side plate 2, a front side plate 3, a rear side plate 4 and a right side plate 5. Along the length direction of box, from the left side right side, be equipped with the cross slab 6 parallel with lower plate 1 in proper order and with lower plate 1 vertically first longitudinal baffle 7 and second longitudinal baffle 8 to divide into consecutive feed liquor groove 10, mixing tank 20, mixed flow layering groove 30 and liquid collecting groove 40 with the inside of box. The bottom of the mixing tank 20, the mixed flow layering tank 30 and the liquid collecting tank 40 are all lower bottom plates 1, and the top ends are the top ends of all side plates.

The liquid inlet tank 10 includes two liquid inlet chambers for containing an extractant and a molten metal, respectively. The mixing tank 20 mixes the extractant with the molten metal to form a liquid stream to initiate extraction. The mixed flow layering tank 30 layers the liquid flow to obtain two layered liquids. An upper liquid collecting chamber and a lower liquid collecting chamber are arranged in the liquid collecting tank 40 and are respectively used for collecting upper-layer layering liquid and lower-layer layering liquid.

The bottom of the first longitudinal partition 7 is arranged on the lower bottom plate 1, and the first longitudinal partition, the transverse partition 6, the lower bottom plate 1, the left side plate 2, the front side plate 3 and the rear side plate 4 enclose a liquid inlet groove 10.

The liquid inlet partition plate 11 is vertically arranged on the lower bottom plate 1 and divides the liquid inlet groove 10 into an extractant liquid inlet chamber 12 and a metal liquid inlet chamber 13 with equal areas.

The extractant liquid inlet chamber 12 is used for containing an extractant, and the corresponding left side plate 2 is provided with an extractant liquid inlet 121. The extractant inlet 121 is connected with a PPV0806 type right-angle pipe joint which is communicated with an external pipeline, so that the extractant enters the extractant inlet chamber 12.

The metal liquid inlet chamber 13 is used for containing metal liquid, and the corresponding left side plate 2 is provided with a metal liquid inlet 131. The metal liquid inlet 131 is connected with a PPV0806 type right-angle pipe joint which is used for being communicated with an external pipeline, so that metal liquid enters the metal liquid inlet chamber 13.

The transverse partition plate 6, the left side plate 2, the front side plate 3, the rear side plate 4 and the first longitudinal partition plate 7 jointly enclose a mixing tank 20. Wherein the top end of the first longitudinal partition 7 is 2cm lower than the top ends of the front side plate 3 and the rear side plate 4, so that the liquid flow flows into the mixed flow layered slot 30 from the top end of the first longitudinal partition 7.

The bottom of the mixing tank 20 is provided with a circular mixing liquid inlet 21. The mixing inlet 21 is opened at the center of the diaphragm 6 and divided into two parts of equal area by the inlet diaphragm 11. One part is communicated with an extracting agent liquid inlet chamber 12, and the other part is communicated with a molten metal liquid inlet chamber 13. The extractant and the metal liquid enter the mixing tank 20 through a mixing liquid inlet 21 to be mixed to form a liquid flow, and the extraction process is started. The liquid stream then flows from left to right along the length of the tank, through the mixed flow stratification tank 30 and into the collection tank 40.

FIG. 3 is a schematic view of the structure of a stirrer in example 1 of the present invention.

As shown in FIGS. 1 and 3, a turbulent plate 22 is vertically installed on each of the four walls of the mixing tub 20. An agitator 50 is also provided in the mixing tank 20. The stirrer 50 has a stirring shaft 501, a paddle base 502, and a paddle 503. The upper end of the stirring shaft 501 is provided with an FBLW575W-GFB type motor, and the lower end is provided with a blade base 502. The length is one tenth of the height of the mixing tank 20. The paddle 503 has four pieces, which are arranged at 90 ° to each other and vertically on the paddle base 502.

Along with the rotation of motor, stirring shaft 501 drives paddle base 502 and four paddle 503 synchronous rotations, thereby rotates at every turn and can drive a large amount of liquid and promote the production of vortex, and the suction effect that the vortex brought can be with liquid follow feed liquor room suction mixing tank 20, so agitator 50 plays the effect of stirring and suction feed liquor. The four blades 503 are mutually 90 degrees and vertically distributed on the blade base 502, the distribution makes the blades 502 vertical to the flow direction of the liquid flow, and the length of the blades 502 is longer, so that the stirring resistance is large, and a larger vortex can be formed.

After the vortex flow is generated, the liquid spreads around under the action of centrifugal force, and collides with the turbulent flow plate 22 to generate disordered turbulent flow, so that the effect of assisting the fully mixing of the extracted liquid (molten metal) and the extracted liquid is achieved.

As the amount of the extractant and the molten metal entering the mixing tank 20 increases, the liquid level rises, and the liquid flow enters the mixed flow layering tank 30 from the upper end of the first longitudinal partition plate 7.

Fig. 4 is a front view of the apparatus for extraction separation of metals in example 1 of the present invention, fig. 5 is a plan view of the apparatus for extraction separation of metals in example 1 of the present invention, and fig. 6 is a right side view of the apparatus for extraction separation of metals in example 1 of the present invention.

As shown in fig. 1 and fig. 4 to 6, the casing between the first vertical partition 7 and the second vertical partition 8 is a mixed flow layered slot 30. The bottom end of the second longitudinal partition plate 8 is not contacted with the lower bottom plate 1, is at least 1.5cm higher than the lower bottom plate 1, and the top end of the second longitudinal partition plate is flush with the top ends of the front side plate 3 and the rear side plate 4. And the second longitudinal partition 8 has a plurality of holes uniformly arranged thereon.

Three layered plates vertical to the flow direction of the liquid flow are vertically arranged in the mixed flow layered groove 30. The three laminated plates are arranged in sequence from left to right at unequal intervals and are respectively a first laminated plate 31, a second laminated plate 32 and a third laminated plate 33. The three layered plates divide the mixed flow layered tank 30 into four mixed flow splitting chambers with different sizes, namely a first mixed flow splitting chamber 301, a second mixed flow splitting chamber 302, a third mixed flow splitting chamber 303 and a fourth mixed flow splitting chamber 304, which are sequentially arranged from left to right along the flowing direction of the liquid flow.

The bottom end of the first layered plate 31 is not in contact with the lower bottom plate 1, is at least 1.5cm higher than the lower bottom plate 1, and the top end is flush with the top ends of the front side plate 3 and the rear side plate 4.

The second division plate 32, the third division plate 33 and the second longitudinal partition plate 8 are identical in structure and size.

The liquid flows from the bottom end of the first dividing plate 31 into the second mixed dividing chamber 302 and then flows out through the second dividing plate 32, the third dividing plate 33 and the second longitudinal partition 8 in this order.

Both the three laminars and the second longitudinal partition 8 act to slow down the flow rate of the liquid flow, which is favoured by the incompatibility between the extraction liquid and the metal liquid. The mixed liquid flows through the holes arranged on the plate, so that the flow velocity of the fluid is further reduced, the layering of the fluid and the liquid is accelerated, and the liquid flowing out of the second longitudinal partition plate 8 becomes upper and lower layered liquid.

The box between the second longitudinal partition 8 and the right side plate 5 is a liquid collecting tank 40.

An upper liquid collecting chamber 401 and a lower liquid collecting chamber 402 which are surrounded by a plurality of enclosing plates are arranged in the collecting tank 40, the upper liquid collecting chamber 401 is used for collecting upper-layer layered liquid, and the lower liquid collecting chamber 402 is used for collecting lower-layer layered liquid.

The upper liquid collecting chamber 401 is formed by enclosing a first upper liquid baffle 411 and a second upper liquid baffle 412 provided on the lower bottom plate 1, and a rear side plate 4 and a right side plate 5. The height of the first liquid feeding enclosing plate 411 and the height of the second liquid feeding enclosing plate 412 are equal, and are lower than the rear side plate 4 and the right side plate 5 by about 2.5cm, so that the upper-layer layered liquid flows in, and the control liquid flows out from the collecting tank 40. And the right side plate 5 of the upper liquid collecting chamber 401 is provided with an upper liquid outlet 413 which is provided with a PPV0806 type right-angle pipe joint and is communicated with an external upper liquid collecting pipeline.

The lower liquid collecting chamber 402 is formed by enclosing a bottom enclosing plate 421, a first lower liquid enclosing plate 422, a second lower liquid enclosing plate 423, a front side plate 3 and a right side plate 5. The bottom surrounding plate 421 is provided with a lower liquid inlet 424, and a lower liquid outlet pipe 425 is arranged. Lower effluent pipe 425 has external threads that mate with internal threads on lower fluid inlet opening 424 to allow it to rise and fall within lower fluid inlet opening 424, adjusting the height of lower effluent pipe 425 from lower plate 1. The right side plate 5 of the lower liquid collecting chamber 402 is provided with a lower liquid outlet 426 which is provided with a PPV0806 type right-angle pipe joint and communicated with an external lower liquid collecting pipeline.

In this embodiment, the use of the apparatus 100 for extracting and separating metals is described by taking the kerosene solution of P204 as an extracting agent to extract metal ions in the sulfuric acid leaching solution of the nickel-cobalt-manganese ternary battery as an example.

The sulfuric acid leaching solution of the nickel-cobalt-manganese ternary battery contains various leaching metals, including metal elements such as nickel, cobalt, manganese, lithium, copper, aluminum and the like, and when the nickel and cobalt metals are separated, impurity metals (manganese, lithium, copper and aluminum) are firstly removed to purify the nickel and cobalt metals. In this example the solution was purified by means of extraction.

Firstly, the sulphuric acid leachate is pumped into the metal liquid inlet chamber 13 from the metal liquid inlet 131, and the kerosene solution of P204 is pumped into the extractant inlet chamber 12 from the extractant inlet 121. The two solutions respectively enter the mixing tank 20 from the respective liquid inlet chambers through the mixing liquid inlet 21 on the diaphragm plate 6 under the suction action of the stirrer 50, and the two solutions are fully mixed in the mixing tank 20 under the stirring action of the stirrer 50 and the turbulent action of the turbulent flow plate 22; along with the continuous pumping of the liquid, the rising of the liquid level, the mixed liquid overflows from the upper part of the first longitudinal partition plate 7 and flows into the mixed flow layering tank 30; the mixed liquid flowing into the mixed flow layering tank 30 is gradually layered under the action of the first layering plate 31, the second layering plate 32, the third layering plate 33 and the second longitudinal partition plate 8 because the flow velocity of the mixed liquid is reduced due to the blocking of the layering plates and the extraction liquid is incompatible with the aqueous solution; the upper liquid after layering is extraction liquid containing impurity metals, and the lower liquid is purified nickel and cobalt sulfuric acid solution. After the layered liquid flows into the collecting tank 40, the extract liquid flows into the upper liquid collecting chamber 401 and flows out from the upper liquid outlet 413, and the nickel and cobalt sulfuric acid solution flows into the lower liquid collecting chamber 402 from the lower liquid inflow hole 424 at the bottom of the lower liquid collecting chamber 402 and then flows out from the lower liquid outlet 426. It should be noted that the height of lower drain pipe 425 is adjusted according to the height of the liquid level in lower liquid collecting chamber 402, so as to achieve the precise separation and outflow of the stratified liquid.