Electrolysis device capable of stably removing copper

Abstract

The utility model discloses an electrolyzer for stable copper removal, which comprises a pair of electrolytic baths, the baths of the electrolytic baths are arranged oppositely, a plurality of anode slots and a plurality of cathode slots are arranged in the electrolytic baths, and the anode slots and the cathode slots are arranged alternately; a copper anode plate or an insoluble lead anode plate can be inserted into the anode slot, and a stainless steel cathode plate is inserted into the cathode slot. The copper anode plate and the lead-insoluble anode plate are inserted into the electrolytic bath at the same time, the copper anode plate performs electrolysis to increase the copper content in the electrolyte, and the lead-insoluble anode plate performs copper electrodeposition to separate out copper ions in the electrolyte, so that the balance of the copper content in the electrolyte is kept; two functions are achieved through the same electrolytic cell, and it is avoided that an electro-deposition copper device is independently built; meanwhile, the production efficiency is improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of electrolytic cell structure, concretely is a kind of stable copper removal electrolytic device. BACKGROUND

[0002] Copper electrolytic refining is an important process to realize high-purity copper production in copper smelting industry, through the dissolution of anode copper plate and the deposition of cathode copper, finally high-quality cathode copper is obtained. However, there are many technical problems and limitations in the existing technology in the process of copper electrolysis, which significantly restricts the process efficiency and product quality.

[0003] In the process of copper electrolytic refining, anode copper is dissolved into divalent copper ions (Cu 2+ ) under the action of direct current, and is transported to the cathode by electrolyte. However, in the actual electrolysis process, part of the copper will be dissolved in the form of monovalent copper ions (Cu + ). The decomposition and oxidation of monovalent copper ions will lead to the decrease of free sulfuric acid, the increase of copper sulfate concentration and the increase of electrolyte resistance in the electrolyte. These chemical changes not only significantly increase the power consumption, but also reduce the quality of cathode copper. At the same time, the anode mud, impurities and crystalline produced in the electrolysis process will deposit in the liquid delivery pipeline and the inner wall of the electrolytic cell, causing pipeline blockage and equipment scaling, which seriously affects the normal operation of the electrolysis system.

[0004] To solve the problem of too high copper ion concentration in the electrolyte, the existing technology usually adopts independent copper electrodeposition process for copper removal treatment. By constructing independent copper electrodeposition special equipment (such as electrodeposition tank), the electrolyte is regularly purified to make it reach stable copper ion concentration. However, this independent copper removal system needs high fixed investment, and because the independent system and the copper electrolysis system are independent of each other, the production rhythm is difficult to coordinate, which is easy to cause copper ion concentration fluctuation, thereby affecting the product quality and production efficiency of copper electrolysis.

[0005] Finally, to improve the quality of cathode copper, the existing technology usually reduces the viscosity and accelerates the diffusion speed by increasing the temperature of electrolyte. However, the increase of temperature intensifies the evaporation of electrolyte, which leads to a significant increase of acid mist concentration, worsens the workshop environment and threatens the health of employees. INVENTION CONTENTS

[0006] The main purpose of the utility model is to provide a stable copper removal electrolytic device which can keep the copper ion concentration in the electrolyte of electrolytic cell stable.

[0007] The stable copper removal electrolytic device provided by the utility model, which comprises a pair of electrolytic cells with a pair of groove tails arranged oppositely, a plurality of anode slots and a plurality of cathode slots are arranged in the electrolytic cell, and the anode slots and the cathode slots are arranged alternately; the anode slots can be inserted with copper anode plates or insoluble lead anode plates, and the cathode slots are inserted with stainless steel cathode plates.

[0008] In one embodiment of the above device, the anode insertion slot in the electrolytic cell has 58 blocks, and the cathode insertion slot has 57 blocks.

[0009] In one embodiment of the above device, one end of the electrolytic cell is provided with a liquid return pipe to return the electrolyte at the tail of the cell to the head of the cell through a low-position tank and a high-position tank.

[0010] In one embodiment of the above device, a walkway plate is arranged between the tails of the two oppositely arranged electrolytic cells.

[0011] In one embodiment of the above device, a filter bag assembly is arranged on the liquid return pipe of the electrolytic cell outlet, and the filter bag assembly comprises a skeleton and a filter cloth.

[0012] In one embodiment of the above device, the skeleton is a cylindrical skeleton made of PP plastic material, and the filter cloth is an inner lining filter cloth of model 621.

[0013] In one embodiment of the above device, a mist acid collecting assembly is arranged below the walkway plate.

[0014] In one embodiment of the above device, the mist acid collecting assembly comprises a glass steel pipeline, the air inlet of the glass steel pipeline is arranged at the head and tail of each electrolytic cell, and the air outlet of the glass steel pipeline is connected to a desulfurization tower.

[0015] The beneficial effects of the present application are as follows:

[0016] The copper anode plate and the insoluble lead anode plate are simultaneously inserted into the electrolytic cell, the copper anode plate performs electrolysis work to increase the copper content in the electrolyte, the insoluble lead anode plate performs copper deposition work to precipitate copper ions in the electrolyte, and the balance of the copper content in the electrolyte is maintained; two functions are realized through the same electrolytic cell, separate construction of a copper deposition device is avoided, production efficiency is improved, and high-quality copper deposition can be produced. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 The structure of an embodiment of the present application is shown in the figure. (Some anode insertion slots and cathode insertion slots are not shown) DETAILED DESCRIPTION

[0018] The related technical solutions will be described clearly and completely below in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0019] For example, Figure 1As shown, the electrolytic device for stable copper removal disclosed in the embodiment includes an electrolytic tank 1, a filter bag assembly 2, and a mist acid collection assembly 3.

[0020] The electrolytic tank 1 is a main reaction container for simultaneously completing the electrolysis of copper and the electrodeposition of copper removal.

[0021] The interior of each electrolytic tank is configured with 58 anode slots 11 and 57 cathode slots 12, which are arranged alternately.

[0022] The anode slots 11 can be inserted with copper anode plates or insoluble lead anode plates, and the cathode slots 12 are inserted with stainless steel cathode plates to form a direct current system of anode and cathode.

[0023] Each inserted copper anode plate performs electrolytic copper work, and the copper on the anode plate is dissolved into the copper sulfate aqueous solution under the action of direct current. Due to the reverse dissolution reaction of anode copper and cathode copper, the copper content in the electrolyte in the electrolytic tank is increased.

[0024] Each inserted insoluble lead anode plate performs copper electrodeposition work, and the electrochemical reaction is changed from copper dissolution to electrodeposition copper removal, thereby realizing stable removal of copper ions in the electrolyte, reducing the impurity content in the electrolyte, and maintaining the copper ion concentration within a reasonable range.

[0025] At both ends of the electrolytic tank, a liquid return pipe 13 is provided for returning the electrolyte at the tail of the tank to the head of the tank through a low tank and a high tank to maintain the circulation of the electrolyte.

[0026] The tail outlet ends of the two electrolytic tanks are arranged opposite to each other, and a walkway plate 14 is provided in the middle for the convenience of the workers.

[0027] The filter bag assembly 2 is arranged on the liquid return pipe 13 of the electrolytic tank outlet, and is used for filtering impurities in the electrolyte. The filter bag assembly includes a skeleton and filter cloth.

[0028] The skeleton is a cylindrical skeleton made of PP plastic material to ensure structural strength and corrosion resistance. The filter cloth is an inner lining filter cloth of model 621, which is used to filter floating anode mud and suspended impurities in the electrolyte.

[0029] After the electrolyte is filtered by the filter bag assembly, it is returned to the low circulating tank for recycling, avoiding pipeline and tank fouling, and reducing equipment maintenance frequency.

[0030] The mist acid collection assembly 3 is installed under the walkway plate 14 between the two electrolytic tanks, and is used to collect acid mist and harmful gas generated during the electrolysis process.

[0031] The acid mist collecting assembly 3 comprises a glass steel pipeline with a diameter of φ300mm, which is acid corrosion resistant and structurally stable. The air inlet of the glass steel pipeline is arranged at the head and tail of each electrolytic cell, and the size of the air inlet is 400mm*100mm (length*height). The air outlet of the glass steel pipeline is connected to the desulfurization tower of the circulating liquid system.

[0032] After the acid mist enters the pipeline through the air inlet, the acid mist is treated by the desulfurization tower and then discharged, so that the standard discharge is ensured and the environment of the plant is effectively improved.

[0033] The operation method of the device is as follows:

[0034] 1. Perform electrolytic copper production parameter setting. In this embodiment, the flow rate of the electrolyte is set to 28L / cell*min, the current density is 300A / m 2 , the electrolyte temperature is 65-67℃, and the electrolyte copper ion concentration is 45g / L±1g / L.

[0035] 2. Insert copper anode plates into the anode insertion slots of the electrolytic cells, and insert stainless steel cathode plates into the cathode insertion slots. Ensure that the anode plates and the cathode plates are arranged alternately to form a complete anode-cathode direct current system.

[0036] 3. Under the action of direct current, the copper anode plates dissolve to generate divalent copper ions (Cu 2+ ), which are transported to the cathode by the electrolyte to form cathode copper. Due to the reverse dissolution reaction of the anode copper, the copper ion concentration in the electrolyte gradually increases.

[0037] 4. When the copper ion concentration in the electrolyte increases to the set concentration, replace the anode plates. Under the parameter setting of this embodiment, the reverse dissolution rate of the anode copper and the cathode copper is about 1.49%, and about 80% of the copper is removed by electrodeposition. According to the calculation of the electric efficiency of 99% and the operation rate of 96%, 75% of the electrolytic cell anode insertion slots need to be replaced with insoluble lead anode plates. The remaining anode insertion slots are still inserted with copper anode plates, and the cathode insertion slots remain the stainless steel cathode plates.

[0038] 5. At this time, the insoluble lead anode plates perform the electrodeposition copper removal reaction, and the excess copper ions in the electrolyte are deposited as electrodeposited copper, so that the copper ion concentration in the electrolyte is restored to the process requirement range (45g / L±1g / L).

[0039] The advantages of using the device are as follows:

[0040] 1. Copper anode plates and insoluble lead anode plates are simultaneously inserted into the electrolytic cell. The copper anode plates perform electrolysis, increasing the copper content in the electrolyte, while the insoluble lead anode plates perform copper electrodeposition, causing copper ions to be deposited in the electrolyte, thus maintaining the balance of copper content in the electrolyte. This achieves two functions in one electrolytic cell, avoiding the need to build a separate copper electrodeposition unit. It also improves production efficiency and can produce high-quality electrodepositioned copper.

[0041] 2. Using filter bags for impurity filtration reduces the frequency of scaling in pipes and tanks, thus lowering maintenance and downtime costs.

[0042] 3. A concealed acid mist collection system is installed under the walkway of the electrolytic cell to introduce acid mist and harmful gases into the desulfurization tower for treatment before discharge; this effectively reduces the concentration of acid mist and improves the plant environment and working conditions for employees.

[0043] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although detailed descriptions have been provided with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. An electrolytic device for stable copper removal, characterized in that: It includes a pair of electrolytic cells with their tails facing each other. The electrolytic cells are equipped with multiple anode slots and multiple cathode slots, which are arranged alternately. Both copper anode plates and insoluble lead anode plates can be inserted into the anode slots, and stainless steel cathode plates can be inserted into the cathode slots.

2. The electrolytic apparatus for stable copper removal as described in claim 1, characterized in that: The electrolytic cell has 58 anode slots and 57 cathode slots.

3. The electrolytic apparatus for stabilizing copper removal as described in claim 1, characterized in that: One end of the electrolytic cell is equipped with a return pipe that returns the electrolyte from the tail of the cell to the head of the cell via the low-level tank and the high-level tank.

4. The electrolytic apparatus for stabilizing copper removal as described in claim 1, characterized in that: A walkway is provided between the tail ends of two oppositely arranged electrolytic cells.

5. The electrolytic apparatus for stabilizing copper removal as described in claim 3, characterized in that: The return pipe at the outlet of the electrolytic cell is equipped with a filter bag assembly, which includes a frame and a filter cloth.

6. The electrolytic apparatus for stabilizing copper removal as described in claim 5, characterized in that: The skeleton is a cylindrical skeleton made of PP plastic, and the filter cloth is a 621 type inner lining filter cloth.

7. The electrolytic apparatus for stabilizing copper removal as described in claim 4, characterized in that: The walkway slab is equipped with a mist acid collection component.

8. The electrolytic apparatus for stabilizing copper removal as described in claim 7, characterized in that: The mist acid collection assembly includes fiberglass pipes, with the inlets of the fiberglass pipes located at the head and tail of each electrolytic cell, and the outlets of the fiberglass pipes connected to the desulfurization tower.

Images