Automatic acid preparation control device for two-stage normal-pressure front liquid in pressure leaching process
By automatically detecting and adjusting the pH value and liquid level of the front liquid acid tank, the problems of inaccurate acidity and unstable liquid level in the prior art are solved, and the stability and safe production of the pressurized leaching process are achieved.
Patent Information
- Application Number
- CN202422207134.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-10
- Publication Date
- 2025-07-22
- Estimated Expiration
- 2034-09-10
AI Technical Summary
In the prior art, the acidity control of the second-stage pressurized leachate relies on manual operation, resulting in inaccurate acidity and large fluctuations, which cannot meet the stable production requirements, and there are safety hazards, such as idling equipment and excessive liquid level.
The automatic acid dispensing control device is used to detect the pH value in the liquid acid dispensing tank before the pH meter, and the controller is used to automatically control the sulfuric acid metering pump to adjust the acidity, and is equipped with a liquid level gauge and a stirring device to ensure that the acidity and liquid level are within a reasonable range.
It realizes precise control of the acidity of the pre-liquid, reduces manual intervention, avoids equipment abnormalities, and improves production stability and safety.
Smart Images
Figure CN223127803U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of leaching, and relates to an automatic acid mixing control device for the first-stage normal-pressure pre-liquid in the second stage of a pressure leaching process. Background Art
[0002] The pressure leaching process of nickel-cobalt sulfide usually adopts a two-stage normal pressure + two-stage pressure leaching technology. In actual production, the second-stage pressure leaching solution is used for the first-stage normal-pressure pre-liquid. Since the second-stage pressure leaching solution contains less acid and cannot meet the acid concentration requirement for the second-stage normal-pressure leaching, acid mixing operation for the first-stage normal-pressure pre-liquid is required. In the existing acid mixing operation, the flow rates of the second-stage pressure leaching solution and sulfuric acid, the liquid levels of the first-stage pre-acid mixing tank and the sulfuric acid storage tank, and the acidity of the pre-liquid are all manually monitored and operated. The preparation of the acidity of the pre-liquid is not accurate enough, and the fluctuation range is large, which cannot meet the process requirements for stable production of the second-stage normal-pressure leaching. Moreover, there are even phenomena such as no liquid in the first-stage pre-acid mixing tank and the sulfuric acid storage tank, the equipment running idly, and overflow due to too high liquid level, which bring many unsafe factors to safe and stable production. Content of the Utility Model
[0003] The purpose of the utility model is to provide an automatic acid mixing control device for the first-stage normal-pressure pre-liquid in the second stage of a pressure leaching process in view of the problems existing in the prior art.
[0004] Therefore, the utility model adopts the following technical solutions:
[0005] An automatic acid mixing control device for the first-stage normal-pressure pre-liquid in the second stage of a pressure leaching process includes a first-stage pre-acid mixing tank, the first-stage pre-acid mixing tank is connected with a sulfuric acid pipeline, the sulfuric acid pipeline is connected with a sulfuric acid storage tank, a sulfuric acid metering pump is arranged on the sulfuric acid pipeline, the sulfuric acid metering pump is connected with a controller, a first-stage pre-liquid level gauge and a pH meter are arranged on the first-stage pre-acid mixing tank, and the controller is respectively connected with the first-stage pre-liquid level gauge and the pH meter.
[0006] Furthermore, a stirring device is arranged in the first-stage pre-acid mixing tank, and the stirring device is connected with the controller.
[0007] Furthermore, a sulfuric acid level gauge is arranged on the sulfuric acid storage tank, and the sulfuric acid level gauge is connected with the controller.
[0008] Furthermore, the controller is connected with an alarm.
[0009] Furthermore, a liquid adding port is arranged at the top of the first-stage pre-acid mixing tank.
[0010] Furthermore, a drain pipe is connected to the bottom of the first-stage pre-acid mixing tank, and a drain valve is arranged on the drain pipe.
[0011] The beneficial effects of the present utility model are as follows: A pH meter is provided on the front liquid acid preparation tank. The pH value of the front liquid in the front liquid acid preparation tank is automatically detected by the pH meter, and then according to the pH value of the front liquid, the sulfuric acid metering pump is automatically controlled by the controller to input sulfuric acid into the front liquid acid preparation tank to adjust the pH value of the front liquid, so that the pH value of the front liquid meets the corresponding requirements. The operation is simple and greatly saves labor. A front liquid level gauge is provided to effectively prevent the liquid level in the front liquid acid preparation tank from exceeding or falling below the set value range. Brief Description of the Drawings
[0012] Figure 1 is a schematic structural diagram of the present utility model;
[0013] Figure 2 is a schematic control diagram of the present utility model;
[0014] In the figure, 1 - front liquid acid preparation tank, 2 - sulfuric acid pipeline, 3 - sulfuric acid storage tank, 4 - sulfuric acid metering pump, 5 - controller, 6 - front liquid level gauge, 7 - pH meter, 8 - drain pipe, 9 - drain valve, 10 - stirring device, 101 - stirring shaft, 102 - blade, 103 - motor, 11 - sulfuric acid level gauge, 12 - alarm, 13 - liquid adding port. Detailed Embodiment
[0015] The following is a detailed description of the present utility model with reference to the accompanying drawings:
[0016] As Figure 1 shown, a two-stage atmospheric pressure front liquid automatic acid preparation control device for pressure leaching process includes a front liquid acid preparation tank 1 for preparing the front liquid. A liquid adding port 13 for adding the front liquid into the front liquid acid preparation tank 1 is provided at the top of the front liquid acid preparation tank 1. The front liquid acid preparation tank 1 is connected with a sulfuric acid pipeline 2 for inputting sulfuric acid into the front liquid acid preparation tank 1 for front liquid preparation. The sulfuric acid pipeline 2 is connected with a sulfuric acid storage tank 3 for storing the sulfuric acid for preparing the front liquid. A sulfuric acid metering pump 4 is provided on the sulfuric acid pipeline 3. The sulfuric acid metering pump 4 can input the sulfuric acid in the sulfuric acid storage tank 3 into the front liquid acid preparation tank 1 through the sulfuric acid pipeline 2. The sulfuric acid metering pump 4 is connected with a controller 5. The controller 5 can adopt an existing conventional PLC controller. A front liquid level gauge 6 for detecting the liquid level in the front liquid acid preparation tank 1 and a pH meter 7 for detecting the pH value of the solution in the front liquid acid preparation tank 1 are provided on the front liquid acid preparation tank 1. The controller 5 is respectively connected with the front liquid level gauge 6 and the pH meter 7. The controller 5 can control the sulfuric acid metering pump 4 to start according to the pH value detected by the pH meter 7 and then input sulfuric acid into the front liquid acid preparation tank 1 to adjust the pH value of the front liquid. The bottom of the front liquid acid preparation tank 1 is connected with a drain pipe 8, and a drain valve 9 is provided on the drain pipe 8. The prepared front liquid in the front liquid acid preparation tank 1 can be discharged through the drain pipe 8 for use.
[0017] A stirring device 10 is provided in the pre-liquid acid preparation tank 1. The stirring device 10 is connected to the controller 5. Specifically, the stirring device 10 is provided with a stirring shaft 101 in the pre-liquid acid preparation tank 1, blades 102 are provided on the stirring shaft 101, and a motor 103 for driving the rotation of the stirring shaft 101 is provided at the top of the stirring shaft 101. The controller 5 can control the motor 103 to start and drive the stirring shaft 101 and the blades 102 to rotate, so as to stir the pre-liquid in the pre-liquid acid preparation tank 1.
[0018] A sulfuric acid level gauge 11 is provided on the sulfuric acid storage tank 3. The sulfuric acid level gauge 11 is connected to the controller 5, and the controller 5 is also connected to an alarm 12.
[0019] The usage mode of the present utility model is as follows:
[0020] The pre-liquid is added into the pre-liquid acid preparation tank 1 through the liquid adding port 13. The pre-liquid level gauge 6 and the pH meter 7 simultaneously detect the liquid level and pH value of the pre-liquid in the pre-liquid acid preparation tank 1, and send the detection signals to the controller 5. The controller 5 controls the sulfuric acid metering pump 4 to start according to the detected pH value, and conveys the sulfuric acid solution into the pre-liquid acid preparation tank 1 through the sulfuric acid pipeline 2, so that the acidity of the pre-liquid in the pre-liquid acid preparation tank 1 increases. During the process of preparing the pre-liquid, when the pre-liquid level gauge 6 detects that the liquid level in the pre-liquid acid preparation tank 1 reaches the set value, the controller 5 controls the stirring device 10 to stir the solution in the pre-liquid acid preparation tank 1, so that the sulfuric acid and the pre-liquid are fully mixed. When the pH value of the pre-liquid meets the requirements and the preparation is completed, the drain valve 9 can be opened to discharge the pre-liquid from the drain pipe 8 for use. When the acidity of the solution in the pre-liquid acid preparation tank 1 exceeds the upper limit of the process control parameters, the controller 5 controls the sulfuric acid metering pump 4 to stop running, and at the same time the controller 5 controls the alarm 12 to give an audible and visual alarm to prompt the on-site personnel to perform corresponding operations.
[0021] When the liquid level of the solution in the liquid preparation acid tank 1 is lower than the set value, the controller 5 controls the stirring device 10 to stop stirring. In addition, when the liquid level in the pre-liquid acid preparation tank 1 reaches the upper limit, the controller 5 controls the alarm 12 to give an alarm to prompt the operator. When the sulfuric acid level gauge 11 detects that the liquid level in the sulfuric acid storage tank 3 is lower than the set value, the controller 5 controls the alarm 12 to give an alarm to prompt the operator.
Claims
1. An automatic acid preparation control device for the second-stage atmospheric pressure pre-liquid in a pressure leaching process, characterized in that, It includes a front liquid acid preparation tank (1), the front liquid acid preparation tank (1) is connected to a sulfuric acid pipeline (2), the sulfuric acid pipeline (2) is connected to a sulfuric acid storage tank (3), a sulfuric acid metering pump (4) is provided on the sulfuric acid pipeline (2), the sulfuric acid metering pump (4) is connected to a controller (5), a front liquid level gauge (6) and a pH meter (7) are provided on the front liquid acid preparation tank (1), and the controller (5) is respectively connected to the front liquid level gauge (6) and the pH meter (7).
2. The automatic acid preparation control device for the second-stage atmospheric pressure pre-liquid in the pressure leaching process according to claim 1, wherein, A stirring device (10) is provided in the front liquid acid preparation tank (1), and the stirring device (10) is connected to the controller (5).
3. The automatic acid preparation control device for the second-stage atmospheric pressure pre-liquid in a pressure leaching process according to claim 1, wherein, A sulfuric acid level gauge (11) is provided on the sulfuric acid storage tank (3), and the sulfuric acid level gauge (11) is connected to the controller (5).
4. An automatic acid preparation control device for the second-stage atmospheric pressure pre-liquid in a pressure leaching process according to claim 1, characterized in that, The controller (5) is connected to an alarm (12).
5. An automatic acid proportioning control device for the second-stage atmospheric-pressure pre-liquid in a pressure leaching process according to claim 1, characterized in that, A liquid addition port (13) is provided at the top of the front liquid acid preparation tank (1).
6. An automatic acid proportioning control device for the second-stage atmospheric pressure pre-liquid in a pressure leaching process according to claim 1, characterized in that The bottom of the front liquid acid preparation tank (1) is connected to a drain pipe (8), and a drain valve (9) is provided on the drain pipe (8).