Sulfur dioxide adding system

Abstract

The utility model discloses a sulfur dioxide adding system, which belongs to the technical field of non-ferrous metal ore dressing and comprises a liquid carbon dioxide steel cylinder, the liquid carbon dioxide steel cylinder is connected with a gas busbar through a steel cylinder connector and a high-pressure hose, the gas busbar is communicated with a gas pipeline, and a sulfur dioxide steel cylinder is arranged on the gas pipeline. The tail end of the gas pipeline is provided with a flotation stirring tank, one end of the flotation stirring tank is provided with a water outlet pipe, the water outlet pipe is provided with a water flow meter, and the other end of the water outlet pipe is connected with an emergency water pool. The utility model has the following beneficial effects: sulfur dioxide poisoning accidents are prevented; and when the sulfur dioxide steel cylinder leaks, the sulfur dioxide steel cylinder can be timely placed into the alkaline water tank for emergency treatment, so that personnel injury and environmental pollution are prevented.

Description

Technical Field

[0001] The utility model belongs to the technical field of nonferrous metal beneficiation, and in particular relates to a sulfur dioxide adding system. Background Art

[0002] Sulfur dioxide is an important flotation agent in non-ferrous metal flotation. It has a good inhibitory effect on sulfide ores such as lead and zinc, and is a good inhibitor for the separation of copper from lead and zinc. However, since sulfur dioxide is a toxic and harmful gas that can damage the human respiratory tract, cause cancer, and damage the cardiovascular system, its addition process is somewhat dangerous, which leads to its seldom use in mineral processing industry production. It also limits the recovery rate of non-ferrous metals in mineral processing industry production.

[0003] A copper-lead-zinc polymetallic mine has long used sulfurous acid + sodium sulfide as an inhibitor of lead-zinc sulfide ore in the separation of copper and lead-zinc. Sulfous acid is a medium-strong acid, which is very rare in industrial production and difficult to purchase. Therefore, it is prepared by burning pyrite. The sulfurous acid prepared by burning pyrite is mainly prepared by dissolving sulfur dioxide produced during the burning of pyrite in water. Due to the large changes in the properties of the raw materials and the large amount of sulfur dioxide impurities produced after burning, the concentration of on-site addition varies greatly, and the addition of sulfurous acid in the separation operation is very unstable, which seriously restricts the separation and comprehensive recovery rate of useful metals. In addition, the flue gas generated by burning pyrite contains a large amount of sulfides, which will cause air pollution and fail to meet environmental protection requirements. Utility Model Content

[0004] The technical problem to be solved by the utility model is to address the problem raised in the background technology.

[0005] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0006] A sulfur dioxide addition system comprises a liquid carbon dioxide cylinder, wherein the liquid carbon dioxide cylinder is connected to a gas bus through a cylinder joint and a high-pressure hose, the gas bus is connected to a gas pipeline, a sulfur dioxide cylinder is arranged on the gas pipeline, a vaporizer inlet pressure gauge is arranged at the inlet of the sulfur dioxide cylinder, an outlet pressure gauge is arranged at the outlet of the sulfur dioxide cylinder, a flotation stirring tank is arranged at the end of the gas pipeline, a water outlet pipe is arranged at one end of the flotation stirring tank, a water outlet pipe is arranged on the water outlet pipe, and the other end of the water outlet pipe is connected to an emergency water tank.

[0007] A pressure reducing valve, an automatic opening and closing valve, a gas flow control valve, a gas flow meter and a glass rotor flow meter are sequentially arranged between the gas pipeline and the flotation stirring tank.

[0008] The bends of the gas pipeline are connected using pipeline elbows.

[0009] The liquid carbon dioxide cylinder is arranged in a fixed groove. A sulfur dioxide alarm and a sulfur dioxide detector are arranged at the liquid carbon dioxide cylinder and the flotation stirring tank. The sulfur dioxide detector is electrically connected to the sulfur dioxide alarm, and the sulfur dioxide detector is electrically connected to the sound and light alarm in the duty room.

[0010] An axial flow fan is arranged at the liquid carbon dioxide cylinder.

[0011] A centrifugal fan is arranged at the flotation stirring tank, and an online pH meter is arranged on one side of the centrifugal fan.

[0012] The gas bus is provided with an automatic opening and closing valve, and the high-pressure hose is provided with a pressure reducing valve.

[0013] Compared with the prior art, the utility model has the following beneficial effects:

[0014] Automatic opening and closing valves are installed on the bus and gas pipeline. When the sulfur dioxide gas in the environment exceeds the standard, the automatic opening and closing valves can be automatically closed to prevent sulfur dioxide poisoning accidents. When there is insufficient sulfur dioxide in the cylinder, and the pressure and addition flow rate are lower than the set value, an automatic alarm can be sounded in the duty room to remind the personnel on duty to replace the sulfur dioxide cylinder in time to prevent sulfur dioxide supply interruption on site. An alkaline emergency water pool is designed next to the sulfur dioxide adding workshop. When the sulfur dioxide cylinder leaks, it can be placed in the alkaline water pool for emergency disposal in time to prevent personal injury and environmental pollution. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the process equipment and facilities of an embodiment of the utility model.

[0016] Serial number and name of the attached drawings: 1. Flotation stirring tank; 2. Online pH meter; 3. Glass rotor flowmeter; 4. Gas flowmeter; 5. Gas flow control valve; 6. Automatic opening and closing valve; 7. Pressure reducing valve; 8. Pipe elbow; 9. Gas pipeline; 10. Gas bus; 11. High-pressure hose; 12. Cylinder outlet connector; 13. Sulfur dioxide cylinder; 14. Sulfur dioxide vaporizer inlet pressure gauge; 15. Outlet pressure gauge; 16. Sulfur dioxide detector; 17. Sulfur dioxide alarm; 18. Axial flow fan; 19. Water flowmeter; 20. Centrifugal fan; 21. Sound and light alarm; 22. Liquid sulfur dioxide cylinder. DETAILED DESCRIPTION

[0017] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments. The illustrative embodiments and descriptions of the present invention are used to explain the present invention, but are not intended to limit the present invention.

[0018] 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.

[0019] Example 1

[0020] like Figure 1 As shown, a sulfur dioxide addition system described in the utility model comprises a liquid carbon dioxide cylinder 22, the liquid carbon dioxide cylinder 22 is connected to a gas bus 10 through a cylinder joint 12 and a high-pressure hose 11, the gas bus 10 is connected to a gas pipeline 9, a sulfur dioxide cylinder 13 is arranged on the gas pipeline 9, a vaporizer inlet pressure gauge 14 is arranged at the inlet of the sulfur dioxide cylinder 13, an outlet pressure gauge 15 is arranged at the outlet of the sulfur dioxide cylinder 13, a flotation stirring tank 1 is arranged at the end of the gas pipeline 9, a water outlet pipe is arranged at one end of the flotation stirring tank 1, a water flow meter 19 is arranged on the water outlet pipe, and the other end of the water outlet pipe is connected to an emergency water tank; a pressure reducing valve 7 and an automatic opening and closing valve are arranged in sequence between the gas pipeline 9 and the flotation stirring tank 1. 6. a gas flow control valve 5, a gas flow meter 4 and a glass rotor flow meter 3; the bend of the gas pipeline 9 is connected by a pipeline elbow 8; the liquid carbon dioxide cylinder 22 is arranged in a fixed groove, and a sulfur dioxide alarm 17 and a sulfur dioxide detector 16 are arranged at the liquid carbon dioxide cylinder 22 and the flotation stirring tank 1, the sulfur dioxide detector 16 is electrically connected to the sulfur dioxide alarm 17, and the sulfur dioxide detector 16 is electrically connected to the sound and light alarm 21 in the duty room; an axial flow fan 18 is arranged at the liquid carbon dioxide cylinder 22; a centrifugal fan 20 is arranged at the flotation stirring tank 1, and an online pH meter 2 is arranged on one side of the centrifugal fan 20; an automatic opening and closing valve 6 is arranged on the gas bus 10, and a pressure reducing valve 7 is arranged on the high-pressure hose 11.

[0021] Liquid sulfur dioxide is stored in a special steel cylinder for liquid sulfur dioxide. After being transported to the gas bus through a high-pressure hose equipped with a pressure reducing valve, the liquid sulfur dioxide enters the sulfur dioxide vaporizer. After being vaporized in the sulfur dioxide vaporizer, it is transported to the flotation stirring tank by a gas pipeline for separation of copper and lead and zinc. An online pH meter is installed on the stirring tank to observe the pH value of the ore pulp.

[0022] The sulfur dioxide vaporizer is equipped with inlet and outlet pressure gauges to observe the storage amount of sulfur dioxide in the cylinder. The gas pipeline is equipped with automatic opening and closing valves, flow meters, pressure reducing valves, etc. to control the amount of sulfur dioxide added.

[0023] Sulfur dioxide is a toxic and harmful gas. In order to prevent the sulfur dioxide concentration from exceeding the standard in the working environment, the sulfur dioxide adding workshop and the flotation workshop are equipped with sulfur dioxide detectors and sulfur dioxide alarms to detect the sulfur dioxide concentration in the factory and alarm when it exceeds the standard. The sulfur dioxide adding workshop is equipped with an axial flow fan, and the flotation workshop mixing tank is equipped with a centrifugal fan for exhaust ventilation. The mixing tank is equipped with a water pipe. When the amount of sulfur dioxide added to the mixing tank is large, water can be added for dilution.

[0024] Automatic opening and closing valves are installed on the bus and gas pipeline. When the sulfur dioxide gas in the environment exceeds the standard, the automatic opening and closing valves can be automatically closed to prevent sulfur dioxide poisoning accidents.

[0025] In order to realize automatic control and timely replacement of sulfur dioxide cylinders, the inlet pressure gauge and outlet pressure gauge of the sulfur dioxide vaporizer, the gas flow meter, etc. are equipped with sensors, and an audible and visual alarm device is installed in the duty room. When there is insufficient sulfur dioxide in the cylinder and the pressure and addition flow rate are lower than the set value, an automatic alarm can be triggered in the duty room to remind the post personnel to replace the sulfur dioxide cylinder in time to prevent sulfur dioxide supply interruption on site.

[0026] An alkaline emergency water pool is designed next to the sulfur dioxide adding workshop. When the sulfur dioxide cylinder leaks, it can be placed in the alkaline water pool for emergency disposal in time to prevent personal injury and environmental pollution.

[0027] Liquid sulfur dioxide is stored in a special steel cylinder for liquid sulfur dioxide. After being transported to the gas bus through a high-pressure hose equipped with a pressure reducing valve, the liquid sulfur dioxide enters the sulfur dioxide vaporizer. After being vaporized in the sulfur dioxide vaporizer, it is transported to the flotation stirring tank by a gas pipeline for separation of copper and lead and zinc. An online pH meter is installed on the stirring tank to observe the pH value of the ore pulp.

[0028] The technical solutions provided by the embodiments of the present invention are introduced in detail above. Specific examples are used herein to illustrate the principles and implementation methods of the embodiments of the present invention. The description of the embodiments above is only applicable to help understand the principles of the embodiments of the present invention.

Claims

1. A sulfur dioxide addition system, comprising a liquid carbon dioxide cylinder (22), characterized in that: The liquid carbon dioxide cylinder (22) is connected to a gas bus (10) via a cylinder joint (12) and a high-pressure hose (11); the gas bus (10) is connected to a gas pipeline (9); a sulfur dioxide cylinder (13) is arranged on the gas pipeline (9); a vaporizer inlet pressure gauge (14) is arranged at the inlet of the sulfur dioxide cylinder (13); an outlet pressure gauge (15) is arranged at the outlet of the sulfur dioxide cylinder (13); a flotation stirring tank (1) is arranged at the end of the gas pipeline (9); a water outlet pipe is arranged at one end of the flotation stirring tank (1); a water flow meter (19) is arranged on the water outlet pipe; and the other end of the water outlet pipe is connected to an emergency water tank.

2. A sulfur dioxide addition system according to claim 1, characterized in that: A pressure reducing valve (7), an automatic opening and closing valve (6), a gas flow control valve (5), a gas flow meter (4) and a glass rotor flow meter (3) are sequentially arranged between the gas pipeline (9) and the flotation stirring tank (1).

3. A sulfur dioxide addition system according to claim 2, characterized in that: The turning point of the gas pipeline (9) is connected using a pipeline elbow (8).

4. A sulfur dioxide addition system according to claim 3, characterized in that: The liquid carbon dioxide cylinder (22) is arranged in a fixed groove, and a sulfur dioxide alarm (17) and a sulfur dioxide detector (16) are arranged at the liquid carbon dioxide cylinder (22) and the flotation stirring tank (1), the sulfur dioxide detector (16) is electrically connected to the sulfur dioxide alarm (17), and the sulfur dioxide detector (16) is electrically connected to the sound and light alarm (21) in the duty room.

5. A sulfur dioxide addition system according to claim 4, characterized in that: An axial flow fan (18) is provided at the liquid carbon dioxide cylinder (22).

6. A sulfur dioxide addition system according to claim 5, characterized in that: The flotation stirring tank (1) is provided with a centrifugal fan (20), and an online pH meter (2) is provided on one side of the centrifugal fan (20).

7. A sulfur dioxide addition system according to claim 6, characterized in that: The gas bus bar (10) is provided with an automatic opening and closing valve (6), and the high-pressure hose (11) is provided with a pressure reducing valve (7).

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