Device for controlling concentration of nickel concentrate pulpified ore pulp
By setting up a double density meter on the upper and lower parts of the nickel concentrate slurry tank, combined with a liquid level meter and a stirring motor current detector, the problem of not fine control of the slurry concentration in the slurry tank during nickel concentrate slurry is solved, and the problem of insufficient control of the slurry concentration in the slurry tank is achieved. The precise control of the slurry concentration in the slurry tank and the production stability are achieved.
Patent Information
- Application Number
- CN202420936814.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-30
- Publication Date
- 2024-12-17
- Estimated Expiration
- 2034-04-30
AI Technical Summary
The prior art cannot achieve refined control of the slurry concentration during nickel concentrate slurry, resulting in unstable production, and the concentration in the slurry tank cannot be monitored when the density meter fails, affecting production.
A dual density meter is used to set up on the upper and lower parts of the slurry tank, combined with a liquid level meter and a stirring motor current detector to ensure uniform stirring of the ore slurry tank and accurately control the liquid level of the slurry tank, so as to achieve refined control of the slurry concentration in the slurry tank.
Through the coordination of a dual density meter and a liquid level meter, the precise control of the slurry concentration is ensured, and the problem of uneven concentration in the slurry tank is avoided. The stirring current detector can replace its function when the density meter fails to ensure production stability.
Smart Images
Figure CN222182394U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the field of nonferrous metal leaching equipment, in particular to a device for controlling the concentration of nickel concentrate slurry. Background Art
[0002] At present, nickel concentrate needs to be leached in the nickel electrolysis or nickel electrowinning process. The purpose of nickel electrolysis leaching nickel concentrate is to supplement the nickel ion depletion caused by the difference in the electrical efficiency of the anode and cathode of nickel electrolysis through the chlorination leaching of nickel concentrate. Nickel electrowinning is divided into chlorination system electrowinning and sulfuric acid system electrowinning. Chlorination system electrowinning needs to use the chlorination leaching process to leach nickel concentrate to provide a nickel-containing solution for subsequent purification and electrowinning; sulfuric acid system electrowinning needs to use the pressurized leaching process to leach nickel concentrate to provide a nickel-containing solution for subsequent extraction and electrowinning. Chlorination leaching or pressurized leaching is continuous leaching. In order to achieve long-term stable production of the leaching process, the concentration of the nickel concentrate slurry input to the leaching process must be strictly controlled. Stable control of the concentration of the leaching raw material slurry is a prerequisite for stable production of the leaching process. Stable production control can reduce the waste of production materials, reduce energy consumption, and save production costs to a certain extent. Especially for the chlorination leaching process of nickel concentrate, stable control of production can reduce the consumption of chlorine, reduce the escape of tail chlorine, save the liquid alkali materials needed for tail chlorine absorption, and solve environmental problems from the source. The current batching process generally relies on detecting the amount of solution added and the amount of ore to control the liquid-solid ratio. There is no refined control on the concentration of the slurry after slurrying. Only a small number of production units set up a density meter to detect the slurry concentration. Because the specific gravity of nickel concentrate is relatively large, if the speed of the stirring device is not enough or the stirring device fails, the stirring capacity of the nickel concentrate is insufficient, and the concentration of the slurry in the upper part of the slurry tank and the slurry in the lower part may be different. With the traditional method of only setting one density meter, the concentration of the slurry at the monitoring position of the density meter may be treated as the concentration of the entire slurry in the slurry tank. In this way, the concentration of the nickel concentrate slurry cannot be accurately controlled, and once the density meter fails, the slurry concentration cannot be controlled, affecting production. The purpose of this utility model is to improve the refined control of nickel concentrate slurrying and improve the stability of production operation. Utility Model Content
[0003] The technical problem to be solved by the utility model is that the existing technology uses only one density meter to detect the pulp concentration at a position to represent the concentration of the entire pulp or relies on detecting the amount of added solution and the amount of ore to control the liquid-solid ratio, which has the defect that the concentration control degree is not refined enough. The utility model solves the problem of how to achieve refined control of nickel concentrate slurry.
[0004] The technical solution adopted by the utility model is as follows:
[0005] A device for controlling the concentration of nickel concentrate slurry comprises a slurrying tank, wherein a feed port is arranged at the upper part of the slurrying tank, a discharge port is arranged at the lower part of the slurrying tank, a stirring device is arranged inside the slurrying tank, the stirring device is connected to a stirring motor, the stirring motor is fixed outside the slurrying tank, an upper density meter and a lower density meter are arranged on the slurrying tank, and the upper density meter and the lower density meter are respectively located in the upper half and the lower half of the slurrying tank.
[0006] A further technical solution is that a liquid level meter is provided on the slurry tank, and the power supply circuit of the stirring motor is connected to a current detector.
[0007] A further technical solution is that a trough cover is provided on the top of the pulping trough, a feed port is located on the trough cover, and a feeding bin is provided at the feed port.
[0008] A further technical solution is that the discharge port is sequentially connected to a basket filter and a slurry delivery pump through a pipeline.
[0009] In summary, due to the adoption of the above technical solution, the beneficial effects of the utility model are:
[0010] By arranging an upper densitometer and a lower densitometer on the slurrying tank, and the upper densitometer and the lower densitometer are respectively located in the upper half and the lower half of the slurrying tank, when the values of the two densitometers are consistent, it is confirmed that the slurry has been stirred evenly, and the slurry concentration is adjusted to the standard value, and the slurry required for production can be obtained. Compared with the existing technology, the concentration of nickel concentrate slurry can be accurately controlled, and the refined control of nickel concentrate slurry can be realized.
[0011] By providing a level meter on the slurry tank, the power supply circuit of the stirring motor is connected to the current detector. The current detector can detect the liquid level of the slurry tank under the premise of determined slurry concentration; or detect the slurry concentration under the premise of a certain liquid level in the slurry tank. When the slurry concentration is determined, the higher the liquid level of the slurry, the greater the resistance to stirring. In order to maintain the required rotation speed, the current intensity needs to be increased. Therefore, when the slurry concentration is determined, the liquid level of the slurry tank can be judged according to the magnitude of the stirring current; when the liquid level of the slurry tank is constant, the higher the slurry concentration, the greater the resistance to stirring. In order to maintain the required rotation speed, the current intensity needs to be increased. Therefore, when the liquid level of the slurry tank is constant, the concentration of the slurry can be judged according to the magnitude of the stirring current. When the liquid level meter and density meter of the slurry tank fail, the stirring motor current detector can be used to temporarily replace their functions according to the above principle without affecting normal production. BRIEF DESCRIPTION OF THE DRAWINGS
[0012] Figure 1 It is a schematic diagram of the overall structure of the utility model. DETAILED DESCRIPTION
[0013] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments.
[0014] like Figure 1 A device for controlling the concentration of nickel concentrate slurry comprises a slurrying tank 1, a feed port is arranged at the upper part of the slurrying tank 1, a discharge port is arranged at the lower part of the slurrying tank 1, a stirring device 2 is arranged inside the slurrying tank 1, the stirring device 2 is connected to a stirring motor 3, the stirring motor 3 is fixed outside the slurrying tank 1, an upper density meter 4 and a lower density meter 5 are arranged on the slurrying tank 1, and the upper density meter 4 and the lower density meter 5 are respectively located in the upper half and the lower half of the slurrying tank 1.
[0015] When in use, the slurry tank 1 is a slurrying device for nickel concentrate, equipped with a feeding bin 9, a tank cover 8, and a stirring device 2. The stirring device 2 is mainly used to mix the nickel concentrate and the new water evenly. The uniformity of the slurry after the nickel concentrate is slurried must be guaranteed by the stirring device 2. The form, size, setting height, and stirring speed of the paddles of the stirring device 2 all affect the uniformity of the slurry. The stirring device 2 must match the slurry tank 1 to ensure the uniformity of the slurry after the nickel concentrate is slurried. Densitometers are set in the upper and lower parts of the slurry tank 1. When the values of the two densitometers are consistent, it is confirmed that the slurry has been stirred evenly. The slurry concentration is adjusted to the standard value, and the slurry required for production can be obtained, so as to reduce the error between the detected concentration and the overall slurry concentration. Compared with the existing technology, the concentration of the nickel concentrate slurry can be accurately controlled.
[0016] The slurry tank 1 is provided with a liquid level meter 6, and the power supply circuit of the stirring motor 3 is connected to the current detector 7. The current detector 7 can detect the liquid level of the slurry tank 1 under the premise of determining the slurry concentration; or detect the slurry concentration under the premise of a certain liquid level of the slurry tank 1. When the slurry concentration is determined, the higher the liquid level of the slurry, the greater the resistance to stirring. In order to maintain the required rotation speed, the current intensity needs to be increased. Therefore, when the slurry concentration is determined, the liquid level of the slurry tank 1 can be judged according to the magnitude of the stirring current; when the liquid level of the slurry tank 1 is constant, the higher the slurry concentration, the greater the resistance to stirring. In order to maintain the required rotation speed, the current intensity needs to be increased. Therefore, when the liquid level of the slurry tank 1 is constant, the concentration of the slurry can be judged according to the magnitude of the stirring current. When the liquid level meter 6 and the density meter of the slurry tank 1 fail, the current detector 7 of the stirring motor 3 can be used to temporarily replace their functions according to the above principle without affecting normal production. The liquid level meter 6 is mainly used to detect the liquid level of the slurry tank 1. The liquid level of the slurry tank 1 is normally controlled to be about 80%, and cannot exceed 85% to prevent the slurry from overflowing under the action of the stirring device 2.
[0017] The utility model utilizes automatic control means such as a double density meter, a liquid level meter 6, a stirring motor 3 current detector 7, etc. to achieve accurate control of the concentration of nickel concentrate slurry; utilizes a stirring device 2 matched with a slurrying tank 1 to ensure the uniformity of the slurry in the slurrying tank 1; utilizes a basket filter 10 to remove large pieces of debris entrained in the nickel concentrate in advance, thereby ensuring stable and continuous transportation of the nickel concentrate slurry; stable control of the nickel concentrate slurry concentration is a prerequisite for stable production of the leaching process, and stable production control can reduce the waste of production materials, reduce energy consumption, and save production costs to a certain extent.
[0018] The top of the slurry tank 1 is provided with a tank cover 8, a feed port is located on the tank cover 8, a feeding bin 9 is arranged at the feed port, a crane or a shovel loader loads the nickel concentrate into the bin, and the nickel concentrate is added to the slurry tank 1 from the bin, and the feeding bin 9 is the logistics channel for the nickel concentrate to enter the slurry tank 1.
[0019] The discharge port is connected to the basket filter 10 and the slurry delivery pump 11 in sequence through a pipeline. The basket filter 10 is a filtering device for relatively large debris before the nickel concentrate is slurried and transported. During the transportation and storage of nickel concentrate, a small amount of relatively large debris will inevitably be mixed in. If it is not filtered and removed in advance, it will wear or damage the slurry delivery pump 11. Therefore, a basket filter 10 is added to the front end of the slurry delivery pump 11 to remove relatively large debris to ensure the continuity and stability of the slurry delivery. The slurry delivery pump 11 delivers the evenly stirred slurry to the leaching process.
[0020] The above are only preferred embodiments of the present invention.
Claims
1. A device for controlling the concentration of nickel concentrate slurry, comprising a slurry tank (1), wherein a feed inlet is arranged at the top of the slurry tank (1), a discharge outlet is arranged at the bottom of the slurry tank (1), a stirring device (2) is arranged inside the slurry tank (1), the stirring device (2) is connected to a stirring motor (3), and the stirring motor (3) is fixed outside the slurry tank (1), It is characterized in that An upper densitometer (4) and a lower densitometer (5) are provided on the pulping tank (1), and the upper densitometer (4) and the lower densitometer (5) are respectively located at the upper half and the lower half of the pulping tank (1).
2. A device for controlling the concentration of nickel concentrate slurry according to claim 1, It is characterized in that A liquid level meter (6) is provided on the slurry tank (1).
3. A device for controlling the concentration of nickel concentrate slurry according to claim 1 or 2, It is characterized in that The power supply circuit of the stirring motor (3) is connected to the current detector (7).
4. A device for controlling the concentration of nickel concentrate slurry according to claim 1, It is characterized in that The top of the pulping tank (1) is provided with a tank cover (8), a feed inlet is located on the tank cover (8), and a feeding bin (9) is arranged at the feed inlet.
5. A device for controlling the concentration of nickel concentrate slurry according to claim 1, It is characterized in that The discharge port is sequentially connected to the basket filter (10) and the slurry delivery pump (11) via pipelines.