Gold ore leaching wastewater treatment process

Abstract

The invention relates to a gold ore leaching wastewater treatment process, which comprises a horizontally arranged electrolytic tube, an anode bar, a cathode bar, a conducting ring, an anode panel and a cathode panel are arranged in the electrolytic tube, when gold ore wastewater is treated and electrolysis operation is carried out, negative charges are gathered on the conducting ring and then transferred to the anode panel through a wire, and the negative charges are transferred to the cathode panel through a wire. Meanwhile, positive charges are transferred to the cathode panel through a wire after being gathered on the conducting ring, potential difference is generated between the anode panel and the cathode panel, an electric field is formed, and metal cations and anions are deviated and gathered under the action of electric field force, so that the electrolysis process is further promoted; in the flowing process of the cyanide-containing waste liquid, the driving impeller is driven to rotate, and the position of the conductive gasket is adjusted, so that charges on the electricity gathering ball are circularly and intermittently transferred to the anode panel and the cathode panel, the situation that the electric field intensity is reduced due to the fact that charged ions continuously move towards the anode panel and the cathode panel to consume the charges is avoided, and the electrolysis efficiency is further improved.

Description

Technical Field

[0001] The invention belongs to the technical field of pollutant treatment, and in particular relates to a gold ore leaching wastewater treatment process. Background Art

[0002] With the development of my country's economy, gold, as an important resource, has a rapidly increasing demand and an increasing output. However, the mining and refining process of gold requires the discharge of a large amount of wastewater. Three tons of water and nearly 20 tons of water are needed to process one ton of gold ore. It is estimated that the annual discharge of gold beneficiation wastewater is nearly 1.2 billion tons. In the process of gold mining, cyanide is used as a solvent to extract gold. Therefore, while producing gold, a large amount of cyanide is discharged with wastewater and abandoned tailings to pollute the environment. These wastewaters have complex compositions, and heavy metal ions are the main pollutants that have a greater impact on the environment. These heavy metals are toxic, not easily biodegradable, and can be accumulated by organisms. Therefore, these wastewaters will cause serious harm to human health and the environment. Therefore, the gold ore leaching wastewater must be treated to meet the discharge standards.

[0003] At present, the main methods for treating gold mine wastewater include chemical precipitation, biodegradation, adsorption and membrane separation. However, these methods have problems such as secondary pollution, high cost and high energy consumption to varying degrees. With the continuous maturity of clean power generation technologies such as wind power generation and solar power generation, the cost of treating gold mine wastewater by electrolysis continues to decrease, and the operation is simple. In addition, compared with chemical precipitation, biodegradation and other methods, it can effectively avoid secondary pollution.

[0004] Due to its remarkable characteristics, the electrolysis method has great development prospects. Summary of the invention

[0005] In view of this, the object of the present invention is to provide a gold ore leaching wastewater treatment process to solve the above problems.

[0006] To achieve the above object, the technical solution adopted by the present invention is:

[0007] A gold ore leaching wastewater treatment process, the equipment used in the wastewater treatment process includes a gold ore leaching wastewater treatment device, the gold ore leaching wastewater treatment device includes a horizontally placed electrolytic tube, the electrolytic tube is provided with an anode rod, a cathode rod, a conductive ring, an anode panel, and a cathode panel, characterized in that: the anode rod and the cathode rod are arranged at one end close to the water outlet at the left end of the electrolytic tube, the left ends of the anode rod and the cathode rod are both provided with connecting ends, the connecting ends pass through the side wall of the electrolytic tube, and the connecting ends are connected to the electrolytic power supply through a wire, the conductive rings are evenly distributed on the anode rod and the cathode rod, both ends of the anode rod and the cathode rod are fixed with connecting rods, the other end of the connecting rod is fixedly connected to the inner wall of the electrolytic tube, the right side of the anode rod is provided with a cathode panel, and the right side of the cathode rod is provided with a cathode panel. An anode panel is arranged on the side, and the anode panel and the cathode panel are fixedly connected to the inner wall of the electrolysis tube. An anode conductive rod is arranged between the gap between the anode rod and the inner wall of the electrolysis tube. The left and right ends of the anode conductive rod are respectively fixedly connected to the connecting rod at the corresponding end. A plurality of conductive rings are evenly fixed on the anode conductive rod. The conductive rings on the anode conductive rod are sleeved on the anode rod. The axis of the conductive ring coincides with the axis of the anode rod. A cathode conductive rod is arranged between the gap between the cathode rod and the inner wall of the electrolysis tube. The left and right ends of the cathode conductive rod are respectively fixedly connected to the connecting rod at the corresponding end. A plurality of conductive rings are evenly fixed on the cathode conductive rod. The conductive rings on the cathode conductive rod are sleeved on the cathode rod. The axis of the conductive ring coincides with the axis of the cathode rod. The wastewater treatment process comprises the following steps:

[0008] S1: adding glucose to the wastewater generated by the gold leaching and gold recovery process, so that the glucose reacts with the oxidant of the leached wastewater to obtain cyanide-containing wastewater without oxidizing activity;

[0009] S2: adjusting the pH value to 9 by adding sodium hydroxide solution to the cyanide-containing waste liquid without oxidation activity;

[0010] S3: The cyanide-containing wastewater with no oxidation activity after adjusting the pH value is passed into the electrolysis tube for electrolysis. After electrolysis, the metal cations in the cyanide-containing wastewater are reduced to metal deposits by electrons on the cathode rod to form sedimentary mud, and the wastewater barren liquid without metal cations is discharged from the electrolysis tube;

[0011] S4: adding polyacrylamide to the wastewater barren liquid for coagulation treatment, and removing impurities in the wastewater barren water to obtain a supernatant;

[0012] S5: adding zinc sulfate to the supernatant, and cyanide in the supernatant is precipitated in the form of zinc cyanide; the treated liquid is sent to a water pool for reuse in the gold ore leaching process;

[0013] S6: Add sulfuric acid to the treated liquid for acidification, adjust the pH value and reuse.

[0014] Furthermore, a driving impeller is provided at the port portion of the electrolysis tube near the water inlet, two mounting frames are rotatably sleeved on the rotating shaft of the driving impeller, and the anode panel and the cathode panel are located between the two mounting frames, the mounting frames are fixedly connected to the inner wall of the electrolysis tube, an adjusting box is provided at the end of the rotating shaft of the driving impeller away from the water inlet of the electrolysis tube, and protective covers are symmetrically fixed to the outer wall of the electrolysis tube front and back, each protective cover is provided with an internally hollow polyelectric ball, a conductive tube is provided on the polyelectric ball, the conductive tube is inserted into the electrolysis tube, the two conductive tubes are respectively connected to the anode conductive rod and the cathode conductive rod on the corresponding side, an anode cavity and a cathode cavity are provided inside the adjusting box, and fixed conductive rings are provided in the anode cavity and the cathode cavity, The fixed conductive ring is fixedly connected to the adjustment box, and the fixed conductive ring in the anode cavity is connected to the anode conductive rod through a wire, and the fixed conductive ring in the cathode cavity is connected to the cathode conductive rod through a wire. A rotating adjustment ring is rotatably sleeved on each fixed conductive ring, and the rotating adjustment ring is fixedly connected to the rotating shaft of the driving impeller inside the rotating adjustment ring. A conductive gasket is arranged on the rotating adjustment ring, and one end of the conductive gasket contacts the fixed conductive ring. Brushes are arranged in the anode cavity and the cathode cavity, and as the driving impeller rotates, the brushes in the anode cavity and the cathode cavity contact and separate from the conductive gasket at the same time, the brush in the anode cavity is connected to the anode panel through a wire, and the brush in the cathode cavity is connected to the cathode panel through a wire.

[0015] Furthermore, the electrolysis tube is made of PVC material.

[0016] Furthermore, the connection end is sealed at the position where it passes through the side wall of the electrolysis tube to prevent waste water leakage.

[0017] Furthermore, the conductive tube is inserted into the electrolysis tube for sealing to prevent leakage of waste liquid.

[0018] The beneficial effects of the present invention are as follows: during the electrolysis operation of the present invention, metal cations showing positive charge in the cyanide-containing wastewater approach the cathode rod, and anions showing negative charge in the cyanide-containing wastewater approach the anode rod. After the negative charge is gathered on the conductive ring, it is transferred to the anode panel through the wire. At the same time, after the positive charge is gathered on the conductive ring, it is transferred to the cathode panel through the wire. A potential difference is generated between the anode panel and the cathode panel, and an electric field is formed. After that, when the cyanide-containing wastewater passes through the electric field between the anode panel and the cathode panel, under the action of the electric field force, the metal cations deviate to the cathode panel side, and the anions deviate to the anode panel side, further promoting the metal The cations approach the cathode rod and the anions approach the anode rod. Finally, the electrolysis process generates an electric field between the anode panel and the cathode panel to form a positive feedback, causing the metal cations and anions to deviate and aggregate, further promoting the electrolysis process. A driving impeller is arranged in the electrolysis tube. The driving impeller is driven to rotate during the flow of the cyanide waste liquid, and the position of the conductive gasket is adjusted to make the charge on the polyelectric ball cyclically transferred to the anode panel and the cathode panel. By transferring the charge cycle intermittently to the anode panel and the cathode panel, it is avoided that the charged ions continue to move to the anode panel and the cathode panel to consume the charge, resulting in a decrease in the electric field strength, thereby further improving the efficiency of electrolysis. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is the process flow chart for leaching wastewater treatment;

[0020] Figure 2 This is a diagram showing the internal structure of the electrolysis tube in Example 1;

[0021] Figure 3 This is a diagram showing the internal structure of the electrolysis tube of Example 2;

[0022] Figure 4 This is the internal structure diagram of the regulating box.

[0023] 1 electrolysis tube; 2 anode rod; 3 cathode rod; 4 conductive ring; 5 anode panel; 6 cathode panel; 7 connecting rod; 8 anode conductive rod; 9 cathode conductive rod; 10 connecting end; 11 driving impeller; 12 mounting frame; 13 adjusting box; 1301 anode cavity; 1302 cathode cavity; 14 protective cover; 15 electric bulb; 16 conductive tube; 17 fixed conductive ring; 18 rotating adjusting ring; 19 conductive gasket; 20 brush. DETAILED DESCRIPTION

[0024] The present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments:

[0025] Embodiment 1: Figure 1-2As shown, a gold ore leaching wastewater treatment device comprises a horizontally placed electrolytic tube 1, wherein an anode rod 2, a cathode rod 3, a conductive ring 4, an anode panel 5, and a cathode panel 6 are arranged inside the electrolytic tube 1, wherein the anode rod 2 and the cathode rod 3 are arranged at one end close to the water outlet at the left end of the electrolytic tube 1, and a connecting terminal 10 is arranged at the left end of the anode rod 2 and the cathode rod 3, and the connecting terminal 10 passes through the side wall of the electrolytic tube 1, and the connecting terminal 10 is connected to the electrolytic power supply through a wire, and the conductive ring 4 is evenly distributed on the anode rod 2 and the cathode rod 3, and connecting rods 7 are fixed at both ends of the anode rod 2 and the cathode rod 3, and the other end of the connecting rod 7 is fixedly connected to the inner wall of the electrolytic tube 1, and a cathode panel 6 is arranged on the right side of the anode rod 2, and an anode panel 5 is arranged on the right side of the cathode rod 3, and the anode panel 5 and the cathode panel 6 are fixedly connected to the inner wall of the electrolytic tube 1 An anode conductive rod 8 is arranged between the gap between the anode rod 2 and the inner wall of the electrolysis tube 1, and the left and right ends of the anode conductive rod 8 are respectively fixedly connected to the connecting rod 7 at the corresponding end, and the anode conductive rod 8 is connected to the anode panel 5 through a wire, and a plurality of conductive rings 4 are evenly fixed on the anode conductive rod 8, and the conductive rings 4 on the anode conductive rod 8 are sleeved on the anode rod 2, and the axis of the conductive ring 4 coincides with the axis of the anode rod 2, and a cathode conductive rod 9 is arranged between the gap between the cathode rod 3 and the inner wall of the electrolysis tube 1, and the left and right ends of the cathode conductive rod 9 are respectively fixedly connected to the connecting rod 7 at the corresponding end, and the cathode conductive rod 9 is connected to the cathode panel 6 through a wire, and a plurality of conductive rings 4 are evenly fixed on the cathode conductive rod 9, and the conductive rings 4 on the cathode conductive rod 9 are sleeved on the cathode rod 3, and the axis of the conductive ring 4 coincides with the axis of the cathode rod 3.

[0026] In this embodiment, the electrolysis tube 1 is made of PVC material.

[0027] In this embodiment, the connecting rod 7 is made of insulating material.

[0028] In this embodiment, the connection end 10 is sealed at the portion where it passes through the side wall of the electrolysis tube 1 to prevent wastewater leakage.

[0029] In this embodiment, based on the treatment process of the above-mentioned gold ore leaching wastewater treatment device:

[0030] S1: adding glucose to the wastewater generated by the gold leaching and gold recovery process, so that the glucose reacts with the oxidant of the leached wastewater to obtain cyanide-containing wastewater without oxidizing activity;

[0031] S2: adjusting the pH value to 9 by adding sodium hydroxide solution to the cyanide-containing waste liquid without oxidation activity;

[0032] S3: The cyanide-containing wastewater with no oxidation activity after adjusting the pH value is passed into the electrolysis tube for electrolysis. After electrolysis, the metal cations in the cyanide-containing wastewater are reduced to metal deposits by electrons on the cathode rod to form sedimentary mud, and the wastewater barren liquid without metal cations is discharged from the electrolysis tube;

[0033] S4: adding polyacrylamide to the wastewater barren liquid for coagulation treatment, and removing impurities in the wastewater barren water to obtain a supernatant;

[0034] S5: adding zinc sulfate to the supernatant, and cyanide in the supernatant is precipitated in the form of zinc cyanide; the treated liquid is sent to a water pool for reuse in the gold ore leaching process;

[0035] S6: Add sulfuric acid to the treated liquid for acidification, adjust the pH value and reuse.

[0036] In this embodiment, when the cyanide-containing wastewater with no oxidizing activity is passed into the electrolysis tube for electrolysis operation, the metal cations showing positive charge in the cyanide-containing wastewater approach the cathode rod 3, and the anions showing negative charge in the cyanide-containing wastewater approach the anode rod 2. The negative charge near the anode rod 2 is gathered on the conductive ring 4 and then transferred to the anode panel 5 through the wire. At the same time, the positive charge near the cathode rod 3 is gathered on the conductive ring 4 and then transferred to the cathode panel 6 through the wire. A potential difference is generated between the anode panel 5 and the cathode panel 6 and an electric field is formed. After that, when the cyanide-containing wastewater passes through the electric field between the anode panel 5 and the cathode panel 6, under the action of the electric field force, the metal cations deviate to the side of the cathode panel 6, and the anions deviate to the side of the anode panel 5, further promoting the metal cations to approach the cathode rod 3 and the anions to approach the anode rod 2. Finally, the electrolysis process generates an electric field between the anode panel 5 and the cathode panel 6 to form a positive feedback, causing the metal cations and anions to deviate and aggregate, further promoting the electrolysis process.

[0037] Embodiment 2: Figure 3-4 As shown, the gold ore leaching wastewater treatment device is based on the embodiment 1, and a driving impeller 11 is arranged at the port portion of the electrolysis tube 1 near the water inlet, and two mounting frames 12 are rotatably sleeved on the rotating shaft of the driving impeller 11, and the anode panel 5 and the cathode panel 6 are located between the two mounting frames 12, and the mounting frame 12 is fixedly connected to the inner wall of the electrolysis tube 1, and a regulating box 13 is arranged at the end of the rotating shaft of the driving impeller 11 away from the water inlet of the electrolysis tube 1, and a protective cover 14 is symmetrically fixed to the outer wall of the electrolysis tube 1, and each protective cover 14 is provided with an internally hollow polyelectric ball 15, and a conductive tube 16 is arranged on the polyelectric ball 15, and the conductive tube 16 is inserted into the electrolysis tube 1, and the two conductive tubes 16 are respectively connected to the anode conductive rod 8 and the cathode conductive rod 9 on the corresponding side.

[0038] In this embodiment, the regulating box 13 is made of insulating material, and an anode cavity 1301 and a cathode cavity 1302 are arranged inside the regulating box 13. A fixed conductive ring 17 is arranged in each of the anode cavity 1301 and the cathode cavity 1303. The fixed conductive ring 17 is fixedly connected to the regulating box 13, and the fixed conductive ring 17 in the anode cavity 1301 is connected to the anode conductive rod 8 through a wire, and the fixed conductive ring 17 in the cathode cavity 1302 is connected to the cathode conductive rod 9 through a wire. A rotating adjusting ring 18 is rotatably sleeved on each of the fixed conductive rings 17, and the rotating adjusting ring 18 Inside, the rotating adjustment ring 18 is fixedly connected to the rotating shaft of the driving impeller 11, and a conductive gasket 19 is arranged on the rotating adjustment ring 18, one end of the conductive gasket 19 is in contact with the fixed conductive ring 17, and brushes 20 are arranged in the anode cavity 1301 and the cathode cavity 1302, and as the driving impeller 11 rotates, the brushes 20 in the anode cavity 1301 and the cathode cavity 1302 are in contact with and separated from the conductive gasket 19 at the same time, the brush 20 in the anode cavity 1301 is connected to the anode panel 5 through a wire, and the brush 20 in the cathode cavity 1302 is connected to the cathode panel 6 through a wire.

[0039] In this embodiment, the conductive tube 16 is inserted into the electrolytic tube 1 for sealing to prevent leakage of waste liquid.

[0040] In this embodiment, the rotating adjustment ring 18 is made of insulating material.

[0041] In this embodiment, when the cyanide-containing waste liquid with no oxidizing activity is passed into the electrolysis tube for electrolysis operation, the metal cations showing positive charge in the cyanide-containing waste liquid approach the cathode rod 3, and the anions showing negative charge in the cyanide-containing waste water approach the anode rod 2. The negative charges near the anode rod 2 gather on the conductive ring 4 and are transferred to the corresponding polyelectric ball 15 through the anode conductive rod 8. The negative charges near the cathode rod 3 gather on the conductive ring 4 and are transferred to the corresponding polyelectric ball 15 through the cathode conductive rod 9. During the flow of the cyanide-containing waste liquid, the driving impeller 11 is driven to rotate, and the position of the conductive gasket 19 is adjusted. During separation, the charges accumulated on the polyelectric ball 20 continue to increase until the conductive gasket 19 contacts the brush 20. The charges on the polyelectric ball 20 are transferred to the anode panel 5 and the cathode panel 6 respectively through the wires. By driving the rotation of the impeller 11, the charges on the polyelectric ball 15 are cyclically and intermittently transferred to the anode panel 5 and the cathode panel 6. By cyclically and intermittently transferring the charges to the anode panel 5 and the cathode panel 6, the strength of the electric field is maintained, so that the metal cations and anions in the cyanide-containing waste liquid are subjected to a sufficiently large magnetic field force when passing through the magnetic field and move to both sides. The metal cations and anions are separated more thoroughly, thereby further improving the efficiency of electrolysis.

[0042] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A gold ore leaching wastewater treatment process, characterized in that: The equipment used in the wastewater treatment process includes a gold ore leaching wastewater treatment device, which includes a horizontally placed electrolytic tube, wherein an anode rod, a cathode rod, a conductive ring, an anode panel, and a cathode panel are arranged inside the electrolytic tube, and the characteristics are as follows: the anode rod and the cathode rod are arranged at one end close to the water outlet at the left end of the electrolytic tube, and the left ends of the anode rod and the cathode rod are both provided with connecting ends, the connecting ends pass through the side wall of the electrolytic tube, and the connecting ends are connected to the electrolytic power supply through a wire, the conductive rings are evenly distributed on the anode rod and the cathode rod, and connecting rods are fixed at both ends of the anode rod and the cathode rod, and the other end of the connecting rod is fixedly connected to the inner wall of the electrolytic tube, a cathode panel is arranged on the right side of the anode rod, and an anode panel is arranged on the right side of the cathode rod. The plate, the anode panel and the cathode panel are all fixedly connected to the inner wall of the electrolysis tube, an anode conductive rod is arranged between the gap between the anode rod and the inner wall of the electrolysis tube, the left and right ends of the anode conductive rod are respectively fixedly connected to the connecting rod at the corresponding end, a plurality of conductive rings are evenly fixed on the anode conductive rod, the conductive rings on the anode conductive rod are sleeved on the anode rod, the axis of the conductive rings coincides with the axis of the anode rod, a cathode conductive rod is arranged between the gap between the cathode rod and the inner wall of the electrolysis tube, the left and right ends of the cathode conductive rod are respectively fixedly connected to the connecting rod at the corresponding end, a plurality of conductive rings are evenly fixed on the cathode conductive rod, the conductive rings on the cathode conductive rod are sleeved on the cathode rod, and the axis of the conductive rings coincides with the axis of the cathode rod; the wastewater treatment process comprises the following steps: S1: adding glucose to the wastewater generated by the gold leaching and gold recovery process, so that the glucose reacts with the oxidant of the leached wastewater to obtain cyanide-containing wastewater without oxidizing activity; S2: adjusting the pH value to 9 by adding sodium hydroxide solution to the cyanide-containing waste liquid without oxidation activity; S3: The cyanide-containing wastewater with no oxidation activity after adjusting the pH value is passed into the electrolysis tube for electrolysis. After electrolysis, the metal cations in the cyanide-containing wastewater are reduced to metal deposits by electrons on the cathode rod to form sedimentary mud, and the wastewater barren liquid without metal cations is discharged from the electrolysis tube; S4: adding polyacrylamide to the wastewater barren liquid for coagulation treatment, and removing impurities in the wastewater barren water to obtain a supernatant; S5: adding zinc sulfate to the supernatant, and cyanide in the supernatant is precipitated in the form of zinc cyanide; the treated liquid is sent to a water pool for reuse in the gold ore leaching process; S6: Add sulfuric acid to the treated liquid for acidification, adjust the pH value and reuse.

2. A gold ore leaching wastewater treatment process according to claim 1, characterized in that: A driving impeller is arranged at a port portion of the electrolysis tube near the water inlet, two mounting frames are rotatably sleeved on the rotating shaft of the driving impeller, and the anode panel and the cathode panel are located between the two mounting frames, the mounting frames are fixedly connected to the inner wall of the electrolysis tube, an adjusting box is arranged at the end of the rotating shaft of the driving impeller away from the water inlet of the electrolysis tube, and protective covers are symmetrically fixed to the outer wall of the electrolysis tube front and back, each protective cover is arranged with an internally hollow polyelectric ball, a conductive tube is arranged on the polyelectric ball, the conductive tube is inserted into the electrolysis tube, the two conductive tubes are respectively connected to the anode conductive rod and the cathode conductive rod on the corresponding side, an anode cavity and a cathode cavity are arranged inside the adjusting box, fixed conductive rings are arranged in the anode cavity and the cathode cavity, and fixed conductive rings are arranged in the anode cavity and the cathode cavity. The conductive ring is fixedly connected to the adjustment box, and the fixed conductive ring in the anode cavity is connected to the anode conductive rod through a wire, and the fixed conductive ring in the cathode cavity is connected to the cathode conductive rod through a wire. A rotating adjustment ring is rotatably sleeved on each fixed conductive ring, and the rotating adjustment ring is fixedly connected to the rotating shaft of the driving impeller inside the rotating adjustment ring. A conductive gasket is arranged on the rotating adjustment ring, and one end of the conductive gasket contacts the fixed conductive ring. Brushes are arranged in the anode cavity and the cathode cavity, and as the driving impeller rotates, the brushes in the anode cavity and the cathode cavity contact and separate from the conductive gasket at the same time, the brush in the anode cavity is connected to the anode panel through a wire, and the brush in the cathode cavity is connected to the cathode panel through a wire.

3. A gold ore leaching wastewater treatment process according to claim 1, characterized in that: The electrolysis tube is made of PVC material.

4. A gold ore leaching wastewater treatment process according to claim 1, characterized in that: The connection end is sealed at the position where it passes through the side wall of the electrolysis tube to prevent waste water leakage.

5. A gold ore leaching wastewater treatment process according to claim 2, characterized in that: The conductive tube is inserted into the electrolytic tube for sealing to prevent leakage of waste liquid.

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