Ore slurry treatment method
By monitoring and controlling the slurry concentration in the concentrate distribution box, the efficiency problems of the thickener and ceramic filter were solved, achieving efficient slurry dewatering and a stable production process.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- JINLONG COPPER
- Filing Date
- 2023-10-11
- Publication Date
- 2026-07-14
AI Technical Summary
In traditional mineral slurry processing, excessively high concentrations of concentrate slurry lead to poor dewatering performance of ceramic filters, affecting production stability and efficiency, and increasing the load on thickeners.
By monitoring and controlling the slurry concentration in the concentrate distribution box to 55-60%, and using the pumping unit and level gauge to control the slurry flow rate, overflow back to the thickener is prevented, ensuring that the slurry concentration is appropriate before entering the ceramic filter.
It improves the dewatering effect and processing efficiency of slurry, avoids the ineffective operation of thickeners and the clogging of ceramic filters, and reduces energy consumption and maintenance costs.
Smart Images
Figure CN117504431B_ABST
Abstract
Description
Technical Field
[0001] This invention belongs to the field of slag beneficiation, and specifically relates to a method for treating slurry. Background Technology
[0002] The concentrate produced during the grinding and flotation process of slag beneficiation is a slurry with a concentration of about 20-40%. Before the concentrate can be returned to the smelting process or other processes for further processing, it needs to be concentrated and filtered to separate most of the water from the slurry before it can be transferred to the concentrate silo.
[0003] The traditional concentrate slurry processing method involves first thickening the slurry in a thickener, then pumping the underflow slurry into a distribution tank where it is stirred evenly before entering a ceramic filter for dewatering. The distribution tank has an overflow port connected to the thickener, allowing the slurry pumped into the distribution tank to continuously overflow back into the thickener. However, this approach not only reduces the overall efficiency of the thickener, but also increases its workload due to secondary sedimentation of the overflow slurry. Prolonged imbalance between inflow and outflow leads to turbidity in the overflow water, affecting the continuous stability of thickener production. Furthermore, the concentration of the underflow slurry gradually increases after secondary sedimentation, often exceeding 70% when entering the concentrate distribution tank. This excessively high concentration, exceeding the ceramic filter's processing range, results in poor dewatering or even prevents normal dewatering operations. Summary of the Invention
[0004] The purpose of this invention is to provide a slurry treatment method that detects and controls the slurry concentration in the concentrate distribution box so that the slurry concentration entering the ceramic filter is appropriate, thereby avoiding excessively high slurry concentration from affecting the operating effect and efficiency of the ceramic filter.
[0005] To achieve the above objectives, the technical solution adopted by the present invention is as follows: a slurry treatment method, characterized in that: the slurry is treated by a slurry treatment system, the slurry treatment system comprising a thickener, a concentrate distribution box and a ceramic filter arranged in sequence, a pumping unit being provided between the underflow port of the thickener and the concentrate distribution box, and after the slurry enters the slurry treatment system, the slurry concentration in the concentrate distribution box is monitored and controlled to be 55-60%.
[0006] The above solution monitors the slurry concentration in the concentrate distribution box in real time, ensuring that the slurry concentration entering the ceramic filter meets the optimal processing concentration of the ceramic filter, thus avoiding excessively high slurry concentration that could affect the processing effect and efficiency. By adopting the solution of this invention, the adsorption effect of the filter is enhanced, greatly improving the slurry dewatering effect and processing efficiency. Attached Figure Description
[0007] Figure 1 This is a schematic diagram of the original design.
[0008] Figure 2 This is a schematic diagram of the improved solution. Detailed Implementation
[0009] The technical solution of the present invention will be further described in detail below with reference to the accompanying drawings.
[0010] Existing technologies often employ, such as Figure 1 The slurry treatment system shown has an overflow port at the top of the concentrate distribution box 30. The concentrate slurry obtained from the flotation process has a concentration of 20-40%. After settling in the thickener 10, the underflow slurry concentration is generally 55-60%. It is pumped to the concentrate distribution box 30 by the pumping unit 20. Due to the operation limitation of the downstream ceramic filter 50, the slurry in the concentrate distribution box 30 gradually accumulates and overflows from the top overflow port back to the thickener 10. Secondary settling occurs in the thickener, causing the concentration of the underflow slurry in the thickener to gradually rise to 70-75%. Therefore, the slurry concentration that finally enters the ceramic filter 50 is about 70-75%. The excessively high slurry concentration leads to poor dewatering effect and reduced working efficiency of the ceramic filter.
[0011] Therefore, the present invention makes the following improvements to the above-mentioned slurry treatment method:
[0012] A method for treating mineral slurry, characterized in that: the mineral slurry is treated by a mineral slurry treatment system, the mineral slurry treatment system comprising a thickener 10, a concentrate distribution box 30 and a ceramic filter 50 arranged in sequence, a pumping unit 20 is provided between the underflow port of the thickener 10 and the concentrate distribution box 30, and after the mineral slurry enters the mineral slurry treatment system, the concentration of the mineral slurry in the concentrate distribution box 30 is monitored and controlled to be 55-60%.
[0013] The slurry concentration in the concentrate distribution box 30 is controlled so that it enters the ceramic filter 50 at the most suitable concentration for dewatering. This not only results in good dewatering effect but also prevents the ceramic filter from becoming clogged with slurry, greatly improving working efficiency.
[0014] A level gauge 60 is installed on the concentrate distribution box 30. The level parameters collected by the level gauge 60 are transmitted to the controller of the drive motor 21 of the pumping unit 20 to control the motor's start and stop actions. Figure 2 As shown, a level gauge is installed in the concentrate distribution box, and upper and lower limits are set. When the level reaches the upper limit, the pumping unit stops pumping, and when the level reaches the lower limit, the pumping of slurry resumes. This ensures that the slurry in the concentrate distribution box is always kept at a suitable height, preventing overflow back to the thickener. This also avoids secondary settling of overflowing slurry, which could lead to excessive concentration of the underflow slurry. Basically, no adjustment of the concentration of the underflow slurry in the thickener 10 is needed to meet the requirements, greatly reducing the difficulty of slurry concentration control.
[0015] The above solution solves the problem of the thickener 10 continuously supplying slurry to the concentrate distribution box 30 via the pumping unit 20. The slurry level in the concentrate distribution box 30 is always within a suitable range, and there is no need for overflow back to the thickener 10. This solves the problem of overflow water mixing caused by frequent backflow of the thickener 10 and eliminates the ineffective operation of the concentrate thickener 30.
[0016] The pumping unit 20 is a metering pump. The concentration of the slurry entering the concentrate distribution tank 30 is obtained by measuring data from the metering pump, eliminating the need for frequent sampling and testing. Conversely, the concentration of the underflow concentrate in the thickener 10 can also be calculated by collecting the amount of slurry entering the concentrate distribution tank 30 using the metering pump. This allows for control of the thickener's settling time or the amount of precipitant added, thereby maintaining the underflow concentrate concentration at 55-60%.
[0017] The thickener 10 has a concentrate feed line 70 connected to the concentrate distribution box 30. If the underflow slurry concentration of the thickener 10 is too high, the concentrate slurry with a concentration of 20-40% obtained from the flotation process in the concentrate feed line 70 can be introduced into the concentrate distribution box 30 through the concentrate feed line 71 to dilute the excessively concentrated slurry. A valve 72 is installed on the concentrate branch line 71.
[0018] The overflow port 32 of the concentrate distribution box 30 is connected to the upper opening of the thickener 10. Since the pumping unit 20 in this invention performs slurry pumping operations based on the liquid level in the concentrate distribution box 30, the overflow port 32 of the concentrate distribution box 30 is generally not needed. The arrangement of connecting the overflow port 32 to the thickener 10 is to prevent unforeseen circumstances where the pumping unit 20 malfunctions after startup, preventing the slurry entering the concentrate distribution box 30 from being stopped. In such a contingency, the slurry can overflow back into the thickener 10. In fact, the slurry treatment system used in this invention is... Figure 1 The slurry treatment system shown is an improved and upgraded version of the traditional model. The original system already had an overflow port 32 connected to the thickener 10, so it was not removed and was used as a backup pipeline.
[0019] The pumping unit 20 includes a metering mortar pump and pumping pipeline, with the impeller shaft of the mortar pump connected to the drive motor 21. In this invention, because the pumping unit 20 operates intermittently, wear and tear on the mortar pump and pumping pipeline are reduced, thus lowering maintenance costs.
[0020] The outlet of the concentrate distribution box 30 is higher than the inlet of the ceramic filter 50, and the two are connected by a chute 40. The chute 40 is provided to connect the outlet of the concentrate distribution box 30 and the inlet of the ceramic filter 50, and the concentrate slurry is transported by gravity, which can further reduce energy consumption.
[0021] The level gauge 60 is a switching device connected to the drive circuit of the drive motor 21. In other words, the level gauge 60 in this invention is a switching component, but the action of this switching component is driven by the high and low levels of the liquid. This is not only easy to implement, but also saves costs and reduces control difficulty.
[0022] The upper limit height of the slurry in the concentrate distribution box 30 is below the overflow port 32, that is, slightly lower than the lowest point of the overflow port 32, to prevent the slurry in the concentrate distribution box 30 from overflowing back into the thickener 10 and causing the clear liquid in the thickener 10 to become mixed; the lower limit height is above the slurry outlet 31 of the concentrate distribution box 30, that is, slightly higher than the highest point of the slurry outlet, to prevent the slurry entering the ceramic filter 50 from being interrupted.
[0023] After adopting the slurry treatment method of the present invention, the slurry in the concentrate distribution box 30 will not overflow back into the thickener 10. Therefore, there is no secondary sedimentation of slurry in the thickener 10, and the concentration of the underflow thickener is still 55-60%. The concentration of the slurry that finally enters the ceramic filter 50 is also 55-60%. The slurry concentration is appropriate and will not affect the filtration effect and working efficiency of the ceramic filter. Therefore, the overall slurry treatment efficiency and dewatering effect are greatly improved.
Claims
1. A method for treating mineral slurry, characterized in that: The slurry is processed by a slurry treatment system, which includes a thickener (10), a concentrate distribution box (30), and a ceramic filter (50) arranged in sequence. A pumping unit (20) is provided between the underflow port of the thickener (10) and the concentrate distribution box (30). After the slurry enters the slurry treatment system, the concentration of the slurry in the concentrate distribution box (30) is monitored and controlled to be 55-60%. The thickener (10) has a concentrate feed pipeline (70) connected to the concentrate distribution box (30) via a concentrate branch (71).
2. The slurry treatment method according to claim 1, characterized in that: A level gauge (60) is installed on the concentrate distribution box (30). The level parameters collected by the level gauge (60) are sent to the controller of the drive motor (21) of the pumping unit (20) to control the motor start and stop.
3. The slurry treatment method according to claim 1 or 2, characterized in that: The pumping unit (20) is a metering pump.
4. The slurry treatment method according to claim 1, characterized in that: A valve (72) is installed on the concentrate branch (71).
5. The slurry treatment method according to claim 1, characterized in that: The overflow port (32) of the concentrate distribution box (30) is connected to the upper opening of the thickener (10).
6. The slurry treatment method according to claim 1, characterized in that: The outlet of the concentrate distribution box (30) is higher than the inlet of the ceramic filter (50) and the two are connected by a chute (40).
7. The slurry treatment method according to claim 2, characterized in that: The level gauge (60) is a switch connected to the drive circuit of the drive motor (21).