Device for recovering precious metal in metallurgical waste acid
By designing a precious metal recovery device in metallurgical polluted acids, and using the combined technology of a cone-shaped denser machine and filter press, the problems of precious metal loss and sewage treatment stability in the metallurgical chemical industry are solved, and efficient recycling of precious metals and reduction of production costs are achieved.
Patent Information
- Application Number
- CN202420692520.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-07
- Publication Date
- 2025-03-25
- Estimated Expiration
- 2034-04-07
AI Technical Summary
In the metallurgical and chemical industry, the flue gas generated by ore powder during smelting contains a large amount of fine dust, resulting in the loss of valuable elements such as gold, silver and copper in the dirty acid, and affects the stability and cost of the water treatment process.
A precious metal recovery device in metallurgical polluted acid is designed, including a conical dense machine, a filter press and a hydraulic transmission system. Through mixing and stirring of polluted acid and agents, solid-liquid separation is performed using a conical dense machine, and combined with the filter press technology of the filter press, precious metal ore mud in the polluted acid is recovered.
The precious and heavy metals in the dirty acids are effectively recycled, which reduces the loss of valuable elements, simplifies the sewage treatment process, reduces production costs, and creates additional profit value for the company.
Smart Images
Figure CN222665546U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of smelting chemical equipment, and specifically relates to a device for recovering precious metals from metallurgical waste acid. Background Art
[0002] At present, most of the metallurgical and chemical industries use treatment processes such as pyrometallurgy to make copper and capture gold. When the ore powder enters the smelting furnace, the flue gas contains a large amount of fine dust that enters the sulfuric acid system. The fine particles are discharged into the water treatment with the waste acid and treated with acid and alkali neutralization. The particulate matter contains valuable elements such as gold, silver, copper and some heavy metals, which will be precipitated into the sewage slag with the acid-base reaction of the waste acid, causing the loss of valuable elements. In addition, the suspended particulate matter entering the water treatment process is prone to mixing, which has a certain impact on the stability and cost of the process. Utility Model Content
[0003] In order to solve the above problems, the utility model provides a device for recovering precious metals in metallurgical waste acid.
[0004] The technical solution of the utility model is implemented as follows: a precious metal recovery device in metallurgical waste acid, comprising a conical thickener, a central cylinder is provided at the center of the conical thickener, a material inlet is provided in the middle of the central cylinder, a clear liquid outlet is provided at the upper part of the central cylinder, a waste acid mixing tank is provided on the upper outer side of the conical thickener, the waste acid mixing tank is connected with the reagent tank through a pipeline, the waste acid mixing tank extends into the conical thickener through a pipeline and is connected with the material inlet, a hydraulic transmission system is provided above the central cylinder, the hydraulic transmission system is connected with a stirring shaft, the lower end of the stirring shaft is cooperatively connected with the conical outlet at the bottom of the conical thickener, the lower part of the conical thickener is connected with a bottom liquid pump through a pipeline, the bottom liquid pump is connected with a filter press through a pipeline, the filter press is connected with the upper part of the conical thickener and the overflow tank through a pipeline and a control valve, and the conical thickener is connected with a dilute acid storage tank arranged on the outer side of the conical thickener through an overflow pipe;
[0005] Preferably, the conical bottom of the conical thickener is provided with a bevel-toothed rake.
[0006] The beneficial effects of the utility model are as follows: the utility model injects the waste acid into a conical thickener, mixes the waste acid with a reagent, separates the suspended matter containing precious metals in the waste acid through solid-liquid separation in the thickener and filters it through an underflow filter press, and filters out the sludge containing precious metals and precious metals, which not only facilitates the implementation of the back-end sewage treatment, but also realizes the recovery of valuable elements in the waste acid, creating additional profit value for the enterprise. BRIEF DESCRIPTION OF THE DRAWINGS
[0007] Figure 1 It is a structural schematic diagram of the utility model.
[0008] Parts description: 1. Conical thickener, 2. Filter press, 3. Dilute acid storage tank, 4. Underflow pump, 5. Center cylinder, 6. Chemical tank, 7. Dilute acid mixing tank, 8. Hydraulic transmission system, 9. Dilute acid, 10. Oblique rake teeth, 11. Overflow pipe, 12. Material inlet, 13. Clear liquid outlet, 14. Filtrate, 15. Agitator shaft, 16. Control valve, 17. Overflow tank, 18. Bottom outlet. DETAILED DESCRIPTION
[0009] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.
[0010] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.
[0011] Refer to the attached Figure 1 A precious metal recovery device in metallurgical waste acid comprises a conical thickener 1, a central cylinder 5 is provided at the center of the conical thickener 1, a material inlet 12 is provided in the middle of the central cylinder 5, a clear liquid outlet 13 is provided at the upper part of the central cylinder 5, a waste acid mixing tank 7 is provided on the upper outer side of the conical thickener 1, the waste acid mixing tank 7 is connected to the reagent tank 6 through a pipeline, the waste acid mixing tank 7 extends into the conical thickener 1 through a pipeline and is connected to the material inlet 12, a hydraulic transmission system 8 is provided above the central cylinder 5, the hydraulic transmission system 8 is connected to the stirring shaft 15, and the stirring shaft 15 is connected to the stirring shaft 15. The lower end of the mixing shaft 15 is connected with the bottom outlet 18 of the conical thickener 1. The conical bottom of the conical thickener 1 is provided with a helical rake 10. The helical rake teeth collect the sludge concentrated at the bottom to the bottom outlet 18 of the conical thickener under the drive of the mixing shaft. The bottom of the conical thickener 1 is connected with the bottom liquid pump 4 through a pipeline. The bottom liquid pump 4 is connected with the filter press 2 through a pipeline. The filter press 2 is connected with the conical thickener 1 through a pipeline and a control valve 16. The conical thickener 1 is connected with the dilute acid storage tank 3 arranged outside the conical thickener 1 through an overflow pipe 11.
[0012] Specifically, the waste acid 9 enters the waste acid mixing tank 7, and the reagent enters the waste acid mixing tank 7 from the reagent tank 6 to mix with the waste acid. After mixing, it enters the central cylinder of the conical thickener through the pipeline and the material inlet 12. The larger fixed particles formed after the waste acid and the reagent react sink to the bottom of the conical thickener, and the clear liquid enters the overflow tank 17 from the clear liquid outlet 13. The waste acid with a higher solid content at the bottom is pumped into the filter press 2 under the action of the bottom liquid pump 4 to filter out the sludge in the waste acid. The filtrate from the filter press returns to the upper part of the thickener or the overflow tank 17, enters the dilute acid storage tank 3 through the overflow pipe 11, and then enters the water treatment process for treatment.
[0013] The utility model can effectively recover most of the valuable elements and heavy metals and other solid particles in the waste acid before entering the water treatment acid-base neutralization treatment, and return the recovered sludge to the front-end production process for ore matching and reuse, which is convenient for the implementation of the back-end sewage treatment and reduces the production cost.
[0014] The above is only a preferred specific implementation method of the utility model, but the protection scope of the utility model is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope of the utility model according to the technical solution and utility model concept of the utility model, which are all covered by the protection scope of the utility model.
Claims
1. A device for recovering precious metals from metallurgical waste acid, characterized in that The conical thickener (1) comprises a central cylinder (5) at the center of the conical thickener (1), a material inlet (12) at the middle of the central cylinder (5), a clear liquid outlet (13) at the top of the central cylinder (5), a waste acid mixing tank (7) at the top and outside of the conical thickener (1), the waste acid mixing tank (7) being connected to a reagent tank (6) via a pipeline, the waste acid mixing tank (7) extending into the conical thickener (1) via a pipeline and being connected to the material inlet (12), a hydraulic transmission system (8) being provided at the top of the central cylinder (5), the hydraulic transmission system (8) being provided at the bottom and outside of the conical thickener (1), the waste acid mixing tank (7) being connected to a reagent tank (6) via a pipeline, the waste acid mixing tank (7) extending into the conical thickener (1) via a pipeline and being connected to the material inlet (12), The driving system (8) is connected to the stirring shaft (15), the lower end of the stirring shaft (15) is cooperatively connected to the conical outlet (18) at the bottom of the conical thickener (1), the bottom of the conical thickener (1) is connected to the bottom liquid pump (4) through a pipeline, the bottom liquid pump (4) is connected through a filter press (2), the filter press (2) is connected to the upper part of the conical thickener (1) and the overflow tank (17) through a pipeline and a control valve (16), and the conical thickener (1) is connected to the dilute acid storage tank (3) arranged outside the conical thickener (1) through an overflow pipe (11).
2. A device for recovering precious metals from metallurgical waste acid as claimed in claim 1, characterized in that The conical bottom of the conical thickener (1) is provided with a bevel-toothed rake (10).