Multistage circulating oxidation system for cyanide breaking ore pulp

Abstract

The multistage circulating oxidation system comprises a slurry pump, a 1 # oxidation separator, a 1 # ore pulp plug flow pump, a 2 # oxidation separator, a 2 # ore pulp plug flow pump, a 3 # oxidation separator, a foam collecting system, a settled ore discharging system, an ozone adding system and the like, the outlet end of the slurry pump is connected with the lower part of the 1 # oxidation separator, the upper part of the 1 # oxidation separator is connected with the inlet end of the 1 # ore pulp plug flow pump, and the outlet end of the 1 # ore pulp plug flow pump is connected with the lower part of the 2 # oxidation separator; the upper part of the 2 # oxidation separator is connected with the inlet end of the 2 # ore pulp plug flow pump, and the outlet end of the 2 # ore pulp plug flow pump is connected with the lower part of the 3 # oxidation separator; and the upper part of the 3 # oxidation separator is connected with the inlet end of the ore pulp discharge pump. The pollutant removal efficiency of cyanide breaking ore pulp treatment by adopting the system is high, ozone can be fully utilized, and the green and environment-friendly requirements are met.

Description

Technical Field

[0001] The utility model relates to a cyanide-breaking slurry processing device, in particular to a multi-stage circulating oxidation system for cyanide-breaking slurry. Background Art

[0002] Ozone is one of the strongest oxidants in nature, and the product of ozone reaction is oxygen, which has no secondary pollution. It has the characteristics of strong oxidizing ability, fast reaction speed, easy use, and green environmental protection. It is widely used in water treatment, chemical oxidation, food processing, medical and health fields.

[0003] In recent years, with the improvement of environmental protection requirements and the restriction of the application of strong oxidants such as chlorides and sulfides, the application of ozone oxidation technology in the field of mineral processing has become a research hotspot and has achieved certain research results.

[0004] For example, mineral cyanidation treatment involves soaking mineral raw materials in a cyanide solution to leach out valuable elements from the raw materials. The resulting cyanide-breaking slurry contains cyanide and reagent residues, has a fine particle size, and a complex composition. If ozone oxidation technology is used directly for treatment, the cyanide-breaking slurry formed by the tailings is a solid-liquid two-phase flow and has uneven particle distribution. This will lead to problems such as low ozone oxidation efficiency, high ozone consumption, and high costs. Therefore, there is an urgent need for a cyanide tailings oxidation cyanide-breaking slurry treatment device with a higher mass transfer mechanism, higher ozone utilization efficiency, and pollutant removal efficiency. Utility Model Content

[0005] In response to the above problems, the utility model provides a multi-stage circulating oxidation system for cyanide-destroying slurry, which adopts three-stage oxidation separators in series to perform deep oxidation treatment on the cyanide-destroying slurry, and ozone flows in the countercurrent to the cyanide-destroying slurry in the oxidation separator, thereby improving the utilization rate of ozone and achieving high pollutant removal efficiency.

[0006] In order to solve this technical problem, the present invention adopts the following solutions:

[0007] A multi-stage circulating oxidation system for cyanide-breaking slurry, comprising a slurry pump, a No. 1 oxidation separator, a No. 1 slurry plug flow pump, a No. 2 oxidation separator, a No. 2 slurry plug flow pump, a No. 3 oxidation separator, a slurry discharge pump, a foam collection system, a sediment discharge system, an ozone dosing system and an exhaust gas treatment system; wherein,

[0008] The outlet end of the slurry pump is connected to the lower part of the 1# oxidation separator, the upper part of the 1# oxidation separator is connected to the inlet end of the 1# slurry plug flow pump, and the outlet end of the 1# slurry plug flow pump is connected to the lower part of the 2# oxidation separator; the upper part of the 2# oxidation separator is connected to the inlet end of the 2# slurry plug flow pump, and the outlet end of the 2# slurry plug flow pump is connected to the lower part of the 3# oxidation separator; the upper part of the 3# oxidation separator is connected to the inlet end of the slurry discharge pump;

[0009] The foam collection system is connected to the top of the 1# oxidation separator, the 2# oxidation separator, and the 3# oxidation separator, respectively, and the sediment discharge system is connected to the bottom of the 1# oxidation separator, the 2# oxidation separator, and the 3# oxidation separator, respectively;

[0010] The ozone dosing system is connected to the bottom of the 3# oxidation separator, the 1# oxidation separator, the 2# oxidation separator, and the 3# oxidation separator are connected in series in sequence, and the top of the 1# oxidation separator is connected to the exhaust gas treatment system, so that ozone passes through the bottom of the 3# oxidation separator, the top of the 3# oxidation separator, the bottom of the 2# oxidation separator, the top of the 2# oxidation separator, the bottom of the 1# oxidation separator and the top of the 1# oxidation separator in sequence, and is discharged from the top of the 1# oxidation separator into the exhaust gas treatment system.

[0011] Furthermore, the bottoms of the 1# oxidation separator, the 2# oxidation separator, and the 3# oxidation separator are respectively connected to mining sewage pumps, and then connected to the sediment discharge system.

[0012] Furthermore, the sediment discharge system includes a sedimentation tank and a filtration tank.

[0013] Furthermore, the top of the 3# oxidation separator is connected to the bottom of the 2# oxidation separator through a pipeline, and the top of the 2# oxidation separator is connected to the bottom of the 1# oxidation separator through a pipeline, thereby realizing the 1# oxidation separator, the 2# oxidation separator, and the 3# oxidation separator being connected in series in sequence.

[0014] Furthermore, the foam collection system includes a foam trap.

[0015] Furthermore, the ozone dosing system includes an ozone generator and a fan.

[0016] By adopting the above technical solution, the present invention has the following advantages compared with the prior art:

[0017] 1. The foam collection system can promptly discharge the foam generated in the system, making the equipment run more stably;

[0018] 2. The multi-stage circulation oxidation mode, combined with the reverse operation of ozone and slurry, improves the utilization rate of ozone;

[0019] 3. The sediment discharge system can discharge the bottom sediment in time and increase the effective volume of the system;

[0020] 4. The entire system uses ozone oxidation, which is green and environmentally friendly;

[0021] 5. The device of the utility model has a simple structure and is easy to process and use;

[0022] 6. The device of the utility model can be used in multiple stages and is flexible in application. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a structural diagram provided by Example 1 of the present utility model.

[0024] Explanation of the markings in the figure: 1-slurry pump; 2-1# oxidation separator; 3-1# slurry plug flow pump; 4-2# oxidation separator; 5-foam collection system; 6-2# slurry plug flow pump; 7-3# oxidation separator; 8-slurry discharge pump; 9-ozone dosing system; 10-precipitated ore discharge system; 11-exhaust gas treatment system. DETAILED DESCRIPTION

[0025] The technical solution of the present invention will be clearly and completely described below in conjunction with the accompanying drawings and specific embodiments, but those skilled in the art will understand that the embodiments described below are part of the embodiments of the present invention, rather than all of the embodiments, and are only used to illustrate the present invention, and should not be regarded as limiting the scope of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative work are within the scope of protection of the present invention. If specific conditions are not specified in the embodiments, they are carried out according to conventional conditions or the conditions recommended by the manufacturer. If the manufacturer is not specified for the reagents or instruments used, they are all conventional products that can be purchased commercially.

[0026] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating positions or relationships, are based on the positions or relationships shown in the accompanying drawings and are intended solely to facilitate the description of this utility model and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0027] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, indirect connections through an intermediate medium, and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0028] Example 1:

[0029] refer to Figure 1 The multi-stage circulating oxidation system for cyanide-breaking slurry includes a slurry pump 1, the outlet end of which is connected to the lower part of the 1# oxidation separator 2. The slurry pump 1 is used to pump the slurry to the 1# oxidation separator 2 for preliminary stripping and separation.

[0030] The inlet end of the 1# slurry plug flow pump 3 is connected to the upper part of the 1# oxidation separator 2, and the outlet end of the 1# slurry plug flow pump 3 is connected to the lower part of the 2# oxidation separator 4. The 1# slurry plug flow pump 3 is used to pump the slurry after preliminary stripping and separation in the 1# oxidation separator 2 to the 2# oxidation separator 4 for preliminary oxidation.

[0031] The inlet end of the 2# slurry plug flow pump 6 is connected to the upper part of the 2# oxidation separator 4, and the outlet end of the 2# slurry plug flow pump 6 is connected to the lower part of the 3# oxidation separator 7. The 2# slurry plug flow pump 6 is used to pump the slurry after preliminary oxidation in the 2# oxidation separator 4 to the 3# oxidation separator 7 for deep oxidation.

[0032] The inlet end of the slurry discharge pump 8 is connected to the upper part of the 3# oxidation separator 7. The slurry discharge pump 8 is used to discharge the slurry after deep oxidation in the 3# oxidation separator 7 to meet the standards.

[0033] In the above system, the ozone dosing system 9 is connected to the bottom of the 3# oxidation separator 7. Ozone passes through the bottom of the 3# oxidation separator 7, the top of the 3# oxidation separator 7, the bottom of the 2# oxidation separator 4, the top of the 2# oxidation separator 4, the bottom of the 1# oxidation separator 2, and the top of the 1# oxidation separator 2 in sequence, and is discharged from the top of the 1# oxidation separator 2 and enters the exhaust gas treatment system 11 for exhaust gas treatment. Specifically, the 1# oxidation separator 2, the 2# oxidation separator 4, and the 3# oxidation separator 7 are connected in series, and the top of the 1# oxidation separator 2 is connected to the exhaust gas treatment system 11.

[0034] To enhance ozone utilization, the top of the 3# oxidation separator 7 can be connected to the bottom of the 2# oxidation separator 4 via a pipeline, and the top of the 2# oxidation separator 4 can be connected to the bottom of the 1# oxidation separator 2 via a pipeline, thereby achieving the series connection of the 1# oxidation separator 2, the 2# oxidation separator 4, and the 3# oxidation separator 7. In a specific embodiment, the ozone dosing system 9 includes an ozone generator and a fan.

[0035] The foam generated at the tops of the three oxidation separators is collected and processed by a foam collection system 5. Specifically, the foam collection system 5 is connected to the tops of the 1# oxidation separator 2, the 2# oxidation separator 4, and the 3# oxidation separator 7. In a specific embodiment, the foam collection system 5 can include a fully automatic foam trap.

[0036] The sediment at the bottom of the three oxidation separators is discharged by a sediment discharge system 10. The sediment discharge system 10 is connected to the bottom of the oxidation separator 1# 2, the oxidation separator 2# 4, and the oxidation separator 3# 7, respectively. To ensure efficient sediment discharge from the bottom of the oxidation separators, it is preferably transported via a mine sewage pump. That is, the bottoms of the three oxidation separators are connected to a mine sewage pump and then to the sediment discharge system 10. In a specific embodiment, the sediment discharge system 10 includes a sedimentation tank and a filtration tank.

[0037] The above system was used to treat cyanide-destroying slurry from a certain factory. The ozone utilization rate exceeded 95%, and the pollutant removal efficiency was about 90-94%.

[0038] Comparative Example 1:

[0039] This comparative example adopts a single-stage oxidation cycle oxidation mode, and the device includes a slurry pump, a 1# oxidation separator, a slurry discharge pump, a foam collection system, a sediment discharge system, an ozone dosing system and an exhaust gas treatment system; wherein,

[0040] The outlet end of the slurry pump is connected to the lower part of the 1# oxidation separator, and the upper part of the 1# oxidation separator is connected to the inlet end of the slurry discharge pump; the foam collection system is connected to the top of the 1# oxidation separator, and the sediment discharge system is connected to the bottom of the 1# oxidation separator through a mine sewage pump; the ozone addition system is connected to the bottom of the 1# oxidation separator, and the top of the 1# oxidation separator is connected to the exhaust gas treatment system.

[0041] Specifically, the foam collection system 5 includes a fully automatic foam catcher, the ozone dosing system 9 includes an ozone generator and a fan, and the sediment discharge system 10 includes a sedimentation tank and a filter tank.

[0042] When the above device was used to treat the cyanide-destroying slurry of a factory in Example 1, the utilization rate of ozone was less than 20%, and the pollutant removal efficiency was about 10-16%.

[0043] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are illustrative and cannot be understood as limitations on the present invention. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present invention without departing from the principles and purpose of the present invention.

Claims

1. A multi-stage circulating oxidation system for cyanide-breaking slurry, characterized by: It includes slurry pump, 1# oxidation separator, 1# slurry plug flow pump, 2# oxidation separator, 2# slurry plug flow pump, 3# oxidation separator, slurry discharge pump, foam collection system, sediment discharge system, ozone dosing system and tail gas treatment system; among which, The outlet end of the slurry pump is connected to the lower part of the 1# oxidation separator, the upper part of the 1# oxidation separator is connected to the inlet end of the 1# slurry plug flow pump, and the outlet end of the 1# slurry plug flow pump is connected to the lower part of the 2# oxidation separator; the upper part of the 2# oxidation separator is connected to the inlet end of the 2# slurry plug flow pump, and the outlet end of the 2# slurry plug flow pump is connected to the lower part of the 3# oxidation separator; the upper part of the 3# oxidation separator is connected to the inlet end of the slurry discharge pump; The foam collection system is connected to the top of the 1# oxidation separator, the 2# oxidation separator, and the 3# oxidation separator, respectively, and the sediment discharge system is connected to the bottom of the 1# oxidation separator, the 2# oxidation separator, and the 3# oxidation separator, respectively; The ozone dosing system is connected to the bottom of the 3# oxidation separator, the 1# oxidation separator, the 2# oxidation separator, and the 3# oxidation separator are connected in series in sequence, and the top of the 1# oxidation separator is connected to the exhaust gas treatment system, so that ozone passes through the bottom of the 3# oxidation separator, the top of the 3# oxidation separator, the bottom of the 2# oxidation separator, the top of the 2# oxidation separator, the bottom of the 1# oxidation separator and the top of the 1# oxidation separator in sequence, and is discharged from the top of the 1# oxidation separator into the exhaust gas treatment system.

2. The multi-stage circulating oxidation system for cyanide-destroying slurry according to claim 1, characterized in that: The bottoms of the 1# oxidation separator, the 2# oxidation separator, and the 3# oxidation separator are respectively connected to mining sewage pumps, and then connected to the sediment discharge system.

3. The multi-stage circulating oxidation system for cyanide-destroying slurry according to claim 2, characterized in that: The sediment discharge system includes a sedimentation tank and a filtration tank.

4. The multi-stage circulating oxidation system for cyanide-destroying slurry according to claim 1, characterized in that: The top of the 3# oxidation separator is connected to the bottom of the 2# oxidation separator through a pipeline, and the top of the 2# oxidation separator is connected to the bottom of the 1# oxidation separator through a pipeline, thereby realizing the 1# oxidation separator, the 2# oxidation separator, and the 3# oxidation separator being connected in series in sequence.

5. The multi-stage circulating oxidation system for cyanide-destroying slurry according to any one of claims 1 to 4, characterized in that: The foam collection system includes a foam trap.

6. The multi-stage circulating oxidation system for cyanide-destroying slurry according to any one of claims 1 to 4, characterized in that: The ozone dosing system includes an ozone generator and a fan.

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