Metal separation device in acid-containing sludge after copper smelting

Abstract

A metal separation device in acid-containing sludge after copper smelting comprises a treatment pond, supporting seats and a cover plate, the lower end of the treatment pond is fixedly connected with the multiple supporting seats, the cover plate is movably installed at the top end of the treatment pond, a copper smelting acid-containing sludge neutralization structure is arranged in the treatment pond, and the copper smelting acid-containing sludge neutralization structure is arranged in the treatment pond. A heavy metal bioleaching treatment separation structure is arranged on the inner side of the cover plate. According to the metal separation device for the acid-containing sludge obtained after copper smelting, after the acid-containing sludge is added, a certain amount of clear water can be injected into the inner side of the treatment pond through the water supplementing pipe, so that the clear water can be neutralized with the acid-containing sludge to facilitate follow-up stirring, and a motor can be connected with a power source to start a rotating column to rotate in the treatment pond; then the rotating column can drive the stirring blades on the outer side to slowly rotate in the treatment tank, so that the mixing efficiency of the sludge and the water can be improved, the sludge deposited at the lower end can be conveniently diluted, the sludge and the water are effectively stirred and mixed, the accumulation of the sludge can be reduced, and the subsequent treatment heavy metal separation efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the field of acid sludge treatment technology in copper smelting systems, and in particular to a metal separation device for acid sludge after copper smelting. Background Technology

[0002] Heavy metals refer to metals with a density greater than 4.5 g / cm3, including gold, silver, copper, iron, mercury, lead, cadmium, etc. When heavy metals accumulate in the human body to a certain level, they can cause chronic poisoning. In terms of environmental pollution, heavy metals mainly refer to mercury, cadmium, lead, chromium, and metalloid arsenic, which are heavy elements with significant biological toxicity. Heavy metals are very difficult to biodegrade; on the contrary, they can be biomagnified thousands of times through the food chain and eventually enter the human body.

[0003] For example, in the separation and treatment device for sludge wastewater containing iron heavy metals authorized by announcement number CN216837268U, a vibrating motor drives the mounting plate to vibrate rapidly through a vibration plate and a vibration rod, thereby driving multiple brushes to vibrate and increasing the brushing frequency on the outer wall of the positive and negative plates.

[0004] However, the aforementioned separation and treatment device for iron-containing heavy metal sludge wastewater still has some problems when in use. For example, since the aforementioned separation and treatment device for iron-containing heavy metal sludge wastewater is used to treat iron-containing heavy metal sludge, a large amount of acidic sludge will be generated after copper smelting. The acidic sludge is not a separate wastewater, but is mixed with deposited silt impurities. The silt impurities will settle at the bottom inside the existing treatment tank, which not only has a limited mixing effect, but also blocks the gap at the connection between the lead screw and the moving plate, causing the operation to stall. This greatly affects the treatment efficiency of the large amount of acidic sludge generated after copper smelting.

[0005] Meanwhile, existing separation and treatment devices for sludge wastewater containing iron and heavy metals use physical methods to purify and filter the wastewater before discharge. However, copper smelting produces a large amount of acidic sludge, which contains many metal components such as valuable metals that can be recycled, such as selenium, copper, and mercury. Current separation and treatment devices are unable to extract these metals for effective recycling, resulting in a waste of metal resources. Summary of the Invention

[0006] This invention aims to solve the problems existing in the prior art by providing a metal separation device for acidic sludge after copper smelting, which can achieve efficient separation and treatment and prevent the waste of metal resources.

[0007] The technical solution adopted by this utility model to solve its technical problem is as follows:

[0008] A metal separation device for acidic sludge after copper smelting is designed, comprising a treatment tank, support bases, and a cover plate. Multiple support bases are fixedly connected to the lower end of the treatment tank, and the cover plate is movably installed at the top of the treatment tank. A treatment trough is fixedly provided on the inner side of the treatment tank, and a copper smelting acidic sludge neutralization structure is provided inside the treatment tank. A heavy metal bioleaching treatment and separation structure is provided on the inner side of the cover plate.

[0009] Further improvements include a copper smelting acid sludge neutralization structure comprising a sludge pipe and a motor. The sludge pipe is fixedly installed on one side of the top of the treatment tank, and a water supply pipe is fixedly installed on the other side of the top of the treatment tank. The motor is fixedly installed at the bottom of the treatment tank, and a rotating column is fixedly connected to the top of the motor's output shaft. Multiple stirring blades are fixedly connected to the outer wall of the rotating column. The stirring blades are rotatably disposed inside the treatment tank, and the bottom of the rotating column is sealed to the lower end of the treatment tank.

[0010] Further improvements are made to the heavy metal bioleaching treatment and separation structure, which includes baffles and replenishment pipes. Two baffles are fixedly connected to both sides of the outer wall of the treatment tank, and two replenishment pipes are fixedly connected to the inner side of the cover plate. Solenoid valves are fixedly installed at the lower ends of the two replenishment pipes, and drip pipes are fixedly connected to the bottom ends of the two replenishment pipes. A drip head is fixedly connected to the lower end of the outer wall of the drip pipe, and a support frame is fixedly installed below the drip pipe.

[0011] Further improvements include the bottom end of the support frame being movably connected to the top end of the rotating column, and the top end of the partition being movably connected to the lower edge of the cover plate.

[0012] To further improve the process, an exhaust pipe is fixedly installed on the inner wall of the treatment tank, and an air pump is fixedly installed at the other end of the exhaust pipe.

[0013] To further improve the process, a guide slope is fixedly installed at the bottom of the inner wall of the treatment tank, and two discharge valves are fixedly installed at the lower end of the treatment tank, with two discharge pipes fixedly installed at the lower ends of the two discharge valves.

[0014] The beneficial effects of this utility model are as follows: In this utility model, the sludge pipe is connected to the discharge pipe of acidic sludge from copper smelting through the rear pipe. In this way, the acidic sludge produced by copper smelting will be poured into the treatment tank and accumulated inside. The water supply pipe is connected to the external water pipe through the rear pipe. In this way, after the acidic sludge is added, a certain amount of clean water can be injected into the treatment tank through the water supply pipe. This clean water can neutralize the acidic sludge and facilitate subsequent stirring. The motor can be connected to the power supply to start the rotating column to rotate inside the treatment tank. Then, the rotating column can drive the outer stirring blades to rotate slowly inside the treatment tank. This can accelerate the mixing efficiency of sludge and water, facilitate the dilution of sludge deposited at the bottom, and effectively complete the mixing of sludge and water. This can reduce sludge accumulation and accelerate the efficiency of heavy metal separation in subsequent treatment.

[0015] The cover plate is placed on top of the treatment tank. After the solenoid valve is opened, the solution of *Thiobacillus ferrooxidans* can be fed down into the drip pipe along the replenishment pipe. The drip pipe will evenly drip the solution of *Thiobacillus ferrooxidans* onto the inside of the treatment tank. The dripped solution of *Thiobacillus ferrooxidans* belongs to a specific microorganism. Relying on the metabolic function of the microorganism, it directly or indirectly oxidizes the heavy metal sulfides in the acidic sludge into soluble metal sulfates, thereby achieving the separation of heavy metals. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0017] Figure 2 for Figure 1 A frontal sectional view;

[0018] Figure 3 for Figure 1 A schematic diagram of the top sectional view;

[0019] Figure 4 for Figure 2 Enlarged sectional view of section A in the middle;

[0020] Figure 5 for Figure 3 Enlarged sectional view of section B

[0021] Figure 6 for Figure 2 Enlarged cross-sectional view of section C.

[0022] Explanation of reference numerals in the attached drawings: 1. Treatment tank, 2. Support base, 3. Cover plate, 4. Treatment trough, 5. Neutralization structure for acidic sludge from copper smelting, 51. Sludge pipe, 52. Water supply pipe, 53. Motor, 54. Rotating column, 55. Stirring blade, 6. Separation structure for heavy metal bioleaching treatment, 61. Baffle plate, 62. Support frame, 63. Drip pipe, 64. Liquid supply pipe, 65. Solenoid valve, 66. Drip head, 71. Exhaust pipe, 72. Air pump, 81. Discharge valve, 82. Discharge pipe, 83. Guide slope. Detailed Implementation

[0023] The present invention will be further described below with reference to the accompanying drawings:

[0024] Example:

[0025] See attached document Figure 1-6In this embodiment, a metal separation device for acidic sludge after copper smelting includes a treatment tank 1, support bases 2, and a cover plate 3. Multiple support bases 2 are fixedly connected to the lower end of the treatment tank 1. The support bases 2 are made of multiple metal steel welded to the lower end of the treatment tank 1. The support bases 2 can support the treatment tank 1 above the ground. The treatment tank 1 can be a recessed tank structure made of precast concrete. The cover plate 3 is movably installed on the top of the treatment tank 1. The cover plate 3 is made of stainless steel metal cover with a diameter slightly larger than that of the treatment tank 1. A treatment trough 4 is fixedly provided on the inner side of the treatment tank 1. The treatment trough 4 is recessed and can hold and contain acidic sludge from copper smelting. The interior of the treatment tank 1 is provided with a copper smelting acidic sludge neutralization structure 5. The inner side of the cover plate 3 is provided with a heavy metal bioleaching treatment and separation structure 6.

[0026] The copper smelting acidic sludge neutralization structure 5 includes a sludge pipe 51 and a motor 53. The sludge pipe 51 is fixedly installed on one side of the top of the treatment tank 1. The sludge pipe 51 is connected to the copper smelting acidic sludge discharge pipe through a rear pipe, so that the acidic sludge produced by copper smelting will be poured into the treatment tank 1 for accumulation. A water supply pipe 52 is fixedly installed on the other side of the top of the treatment tank 1. The water supply pipe 52 is connected to an external water pipe through a rear pipe, so that after the acidic sludge is added, a certain amount of clean water can be injected into the treatment tank 1 through the water supply pipe 52. This clean water can neutralize the acidic sludge and facilitate subsequent stirring. The motor 53 is fixedly installed at the bottom of the treatment tank 1. The top of the output shaft of the motor 53 is fixedly connected to a rotating column 54. The motor 53 is a servo motor. The motor 53 can be connected to the power supply to start the rotating column 54 to rotate inside the treatment tank 1. Then the rotating column 54 can drive the outer stirring blades 55 to rotate slowly inside the treatment tank 4. This can speed up the mixing efficiency of sludge and water and facilitate the dilution of sludge deposited at the bottom. Multiple stirring blades 55 are fixedly connected to the outer wall of the rotating column 54. The stirring blades 55 are rotatably set inside the treatment tank 4. The bottom of the rotating column 54 is sealed to the bottom of the treatment tank 1.

[0027] The heavy metal bioleaching separation structure 6 includes baffles 61 and replenishment pipes 64. Two baffles 61 are fixedly connected to both sides of the outer wall of the treatment tank 1. The baffles 61 are two metal frames welded to an embedded part on the outside of the treatment tank 1, thus the baffles 61 can press against the upper cover 3 and restrict its position. Two replenishment pipes 64 are fixedly connected to the inside of the cover 3. The other end of the replenishment pipes 64 is connected to an external solution of *Thiobacillus ferrooxidans* via a pipe. Solenoid valves 65 are fixedly installed at the lower ends of the two replenishment pipes 64. Therefore, when the cover 3 is placed on top of the treatment tank 1 and the solenoid valve 65 is opened, the *Thiobacillus ferrooxidans* solution can be fed downwards along the replenishment pipes 64 into the drip pipes 63. The drip pipes 63 are supported by a middle support frame 62 at the top of the rotating column 54. The support frame 62 does not rotate with the rotating column 54, but instead evenly drips the *Thiobacillus ferrooxidans* solution onto the inside of the treatment tank 1. A dripping pipe 63 is fixedly connected to the bottom end, and a dripping head 66 is fixedly connected to the lower end of the outer wall of the dripping pipe 63. A support frame 62 is fixedly installed below the dripping pipe 63. The dripping solution of *Thiobacillus ferrooxidans* belongs to a specific microorganism. Relying on the metabolic function of the microorganism, it directly or indirectly oxidizes the heavy metal sulfides in the acidic sludge into soluble metal sulfates, thereby achieving the separation of heavy metals. For example, the microorganism directly attaches to the surface of the heavy metal sulfide, oxidizes the metal sulfide through enzymatic reaction, and releases free metal ions. The microorganism also generates sulfuric acid and ferric sulfate by oxidizing sulfur or ferrous ions. The latter acts as a chemical oxidant to dissolve the heavy metal sulfides. During the reaction process in which the microorganism maintains its activity, substances such as sulfate and elemental sulfur are generated, which further promotes the dissolution of heavy metals. The bottom end of the support frame 62 is movably connected to the top end of the rotating column 54, and the top end of the partition 61 is movably connected to the lower edge of the cover plate 3.

[0028] An exhaust pipe 71 is fixedly installed on the inner wall of the treatment tank 1, and a vacuum pump 72 is fixedly installed at the other end of the exhaust pipe 71. During the metal microbial reaction, a small amount of sulfur dioxide gas may be emitted. At this time, the power supply is connected to start the vacuum pump 72, and the other end of the exhaust pipe 71 is connected to the gas recovery device through a flange. The negative pressure generated by the vacuum pump 72 will suck away the harmful sulfur dioxide gas as much as possible. The impact of a small amount of unadsorbed sulfur dioxide emitted into the air is negligible.

[0029] A guide slope 83 is fixedly installed at the bottom of the inner wall of the treatment tank 1. The guide slope 83 can facilitate the flow of the treated copper smelting acid sludge slurry down the discharge pipe 82. The discharge speed of the slurry can be controlled by the discharge valve 81. Two discharge valves 81 are fixedly installed at the lower end of the treatment tank 1, and two discharge pipes 82 are fixedly installed at the lower end of the two discharge valves 81.

[0030] Working principle:

[0031] The metal separation device for acidic sludge after copper smelting addresses the technical challenges of long treatment processes and low recovery rates in the acidic sludge treatment of copper smelting systems. It proposes an innovative solution for acidic sludge treatment and resource recovery, achieving full separation of valuable metals such as lead, selenium, copper, and mercury from acidic sludge, obtaining intermediate products of selenium, copper, and mercury respectively, and maximizing the recycling of resources.

[0032] Multiple support bases 2 are fixedly connected to the lower end of the treatment pool 1. The support bases 2 are made of multiple metal steel welded to the lower end of the treatment pool 1. The support bases 2 can support the treatment pool 1 above the ground. The treatment pool 1 can be a recessed pool structure made of precast concrete. The cover plate 3 is made of stainless steel metal cover with a diameter slightly larger than that of the treatment pool 1. A treatment trough 4 is fixedly provided on the inner side of the treatment pool 1. The treatment trough 4 is recessed and can be used to hold and contain acidic sludge from copper smelting.

[0033] The sludge pipe 51 is connected to the copper smelting acid sludge discharge pipe through the rear pipe, so that the acid sludge produced by copper smelting will be dumped into the treatment tank 1 and accumulated. The water supply pipe 52 is connected to the external water pipe through the rear pipe, so that after the acid sludge is added, a certain amount of clean water can be injected into the treatment tank 1 through the water supply pipe 52. The clean water can neutralize the acid sludge and facilitate subsequent stirring. The motor 53 can be connected to the power supply to start the rotating column 54 to rotate inside the treatment tank 1. Then the rotating column 54 can drive the outer stirring blade 55 to rotate slowly inside the treatment tank 4, which can speed up the mixing efficiency of sludge and water and facilitate the dilution of the sludge deposited at the bottom.

[0034] The partition 61 consists of two metal frames welded to the pre-embedded parts on the outside of the treatment tank 1. Therefore, the partition 61 can press against the upper cover 3 and restrict the position of the cover 3. The other end of the replenishment pipe 64 is connected to the external thiobacillus ferrooxidans solution through a pipe. The cover 3 is fastened to the top of the treatment tank 1. After the solenoid valve 65 is opened, the thiobacillus ferrooxidans solution can be fed downwards along the replenishment pipe 64 into the drip pipe 63. The drip pipe 63 is supported by the middle support frame 62 and set on the top of the rotating column 54. The support frame 62 does not rotate with the rotating column 54, but will evenly drip the thiobacillus ferrooxidans solution onto the inside of the treatment tank 1. The dripped thiobacillus ferrooxidans solution is a specific microorganism that relies on microorganisms for operation. The metabolic function of microorganisms directly or indirectly oxidizes heavy metal sulfides in acidic sludge into soluble metal sulfates, thereby achieving the separation of heavy metals. For example, microorganisms directly attach to the surface of heavy metal sulfides and oxidize them through enzymatic reactions, releasing free metal ions. Furthermore, microorganisms generate sulfuric acid and ferrous sulfate by oxidizing sulfur or ferrous ions. The latter acts as a chemical oxidant to dissolve heavy metal sulfides. During the reaction process while the microorganisms remain active, substances such as sulfates and elemental sulfur are generated, further promoting the dissolution of heavy metals. This effectively separates and extracts sludge impurities and recyclable metal substances. Subsequently, the solution containing metal ions can be subjected to an oxidation-reduction reaction to re-extract the desired metal materials.

[0035] During the metal microbial reaction, a small amount of sulfur dioxide gas may be emitted. At this time, connect the power supply and start the vacuum pump 72. Connect the other end of the exhaust pipe 71 to the gas recovery device using a flange. The negative pressure generated by the vacuum pump 72 will suck away the harmful sulfur dioxide gas as much as possible. The impact of a small amount of unadsorbed sulfur dioxide emitted into the air is negligible.

[0036] The guide slope 83 facilitates the discharge of the acidic sludge from copper smelting after reaction treatment along the discharge pipe 82. The discharge speed of the sludge can be controlled by the discharge valve 81.

[0037] Although the present invention has been illustrated and described with reference to preferred embodiments, those skilled in the art should understand that various changes in form and detail are possible within the scope of the claims.

Claims

1. A metal separation device for acidic sludge after copper smelting, comprising a treatment tank (1), support bases (2), and a cover plate (3), wherein multiple support bases (2) are fixedly connected to the lower end of the treatment tank (1), and the cover plate (3) is movably installed at the top of the treatment tank (1), characterized in that: The treatment tank (1) is fixedly provided with a treatment tank (4) inside. The treatment tank (1) is provided with a copper smelting acid sludge neutralization structure (5) inside. The cover plate (3) is provided with a heavy metal bioleaching treatment separation structure (6) inside.

2. The metal separation device for acidic sludge after copper smelting according to claim 1, characterized in that: The copper smelting acid sludge neutralization structure (5) includes a sludge pipe (51) and a motor (53). The sludge pipe (51) is fixedly installed on one side of the top of the treatment tank (1). A water supply pipe (52) is fixedly installed on the other side of the top of the treatment tank (1). The motor (53) is fixedly installed at the bottom of the treatment tank (1). A rotating column (54) is fixedly connected to the top of the output shaft of the motor (53). Multiple stirring blades (55) are fixedly connected to the outer wall of the rotating column (54). The stirring blades (55) are rotatably arranged inside the treatment tank (4). The bottom of the rotating column (54) is sealed to the bottom of the treatment tank (1).

3. The apparatus for separating metals from acid-containing sludge after copper smelting according to claim 1, characterized in that: The heavy metal bioleaching treatment separation structure (6) includes a partition (61) and a replenishment pipe (64). The two partitions (61) are fixedly connected to the outer walls of the treatment tank (1) on both sides. The two replenishment pipes (64) are fixedly connected to the inner side of the cover plate (3). A solenoid valve (65) is fixedly installed at the lower end of the two replenishment pipes (64). A drip pipe (63) is fixedly connected to the bottom end of the two replenishment pipes (64). A drip head (66) is fixedly connected to the lower end of the outer wall of the drip pipe (63). A support frame (62) is fixedly installed below the drip pipe (63).

4. The apparatus for separating metals from acid-containing sludge after copper smelting according to claim 3, characterized in that: The bottom end of the support frame (62) is movably connected to the top end of the rotating column (54), and the top end of the partition (61) is movably connected to the lower edge of the cover plate (3).

5. The apparatus for separating metals from acid-containing sludge after copper smelting according to claim 1, characterized in that: An exhaust pipe (71) is fixedly installed on the inner wall of the treatment tank (1), and an air pump (72) is fixedly installed at the other end of the exhaust pipe (71).

6. The metal separation device for acidic sludge after copper smelting according to claim 1, characterized in that: A guide slope (83) is fixedly installed at the bottom of the inner wall of the treatment tank (1), and two discharge valves (81) are fixedly installed at the lower end of the treatment tank (1). Two discharge pipes (82) are fixedly installed at the lower ends of the two discharge valves (81).

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