Magnesium reduction system for mineral separation of platinum group metal concentrate

Abstract

The magnesium reduction system comprises an ore grinding system, a flotation system and a concentration and filtration system which are connected in sequence, and the ore grinding system comprises an ore feeding device, a ball mill and a spiral grading device which are connected in sequence; the flotation system comprises a first feeding device, a stirring storage tank, a first flotation device, a tail discharging device, a second feeding device, a second flotation device and an ore pulp returning device which are sequentially connected through pipelines. The concentration and filtration system comprises a third feeding device, a central transmission type efficient thickener, a fourth feeding device and a ceramic filter which are sequentially connected through pipelines. According to the utility model, the content of magnesium oxide can be reduced in the mineral processing technology of platinum group metal copper-nickel sulfide ore.

Description

Technical Field

[0001] This utility model belongs to the field of mineral processing technology, and in particular relates to a magnesium reduction system for platinum group metal concentrates. Background Technology

[0002] The existing beneficiation process for associated platinum group metal (PGM) copper-nickel sulfide ores utilizes Nelson beneficiation equipment to enrich and recover the PGMs, obtaining gravity concentrate, which is then sent to the precious metals workshop of a smelter for refining and purification. In actual production, the high magnesium oxide content (around 28%) in the PGM concentrate, coupled with its melting point of 2852℃, leads to high energy consumption and large slag volume during smelting, thus affecting the direct metal recovery rate. Utility Model Content

[0003] The purpose of this invention is to provide a magnesium reduction system for platinum group metal concentrates, which can effectively reduce the magnesium oxide content of Nelson gravity concentrates before they enter the smelting process.

[0004] The technical solution adopted in this utility model is as follows:

[0005] A magnesium reduction system for platinum group metal concentrate beneficiation includes a grinding system, a flotation system, and a concentration and filtration system connected in sequence.

[0006] The grinding system includes a feeding device, a ball mill, and a spiral classifier connected in sequence; the flotation system includes a first feeding device, a stirred storage tank, a first flotation device, a tailings discharge device, a second feeding device, a second flotation device, and a slurry return device connected in sequence via pipelines; the thickening and filtration system includes a third feeding device, a center-driven high-efficiency thickener, a fourth feeding device, and a ceramic filter connected in sequence via pipelines.

[0007] Preferably, the spiral classifier is a high-weir spiral classifier, which is equipped with a lifting spiral rod, an overflow slurry outlet and a slag outlet. The slag outlet of the spiral classifier is connected to the ball mill, and the overflow slurry outlet of the spiral classifier is connected to the flotation system.

[0008] Preferably, the feeding device is a belt conveyor.

[0009] Preferably, the flotation device is an aerated flotation machine.

[0010] Preferably, the feeding device, slurry return device, and tailings discharge device are all commonly used slurry pumps.

[0011] In summary, due to the adoption of the above technical solution, the beneficial effects of this utility model are:

[0012] (1) This utility model provides a magnesium reduction system for platinum group metal concentrate in mineral processing, which can significantly reduce the magnesium oxide content before the Nilsson gravity separation concentrate enters the smelting process. This effectively solves the problem of high magnesium oxide content in the platinum group metal recycling and smelting process in the prior art, while reducing energy consumption loss and slag volume in the smelting process, which is conducive to improving the direct recovery rate of smelting.

[0013] (2) The flotation system of this utility model is equipped with two-stage flotation. After the first stage flotation machine is completed, the selected foam is further selected by the second stage flotation machine, which is conducive to improving the purity of the product and improving the quality of platinum group metal concentrate. Attached Figure Description

[0014] Figure 1 This is a system flowchart of the present invention;

[0015] Figure 2 This is a system schematic diagram of the present invention.

[0016] In the diagram: 1-Feeding device, 2-Ball mill, 3-Spiral classifier, 4-First feeding device, 5-Stirred storage tank, 6-First flotation device, 7-Second feeding device, 8-Tail discharge device, 9-Pulp return device, 10-Second flotation device, 11-Third feeding device, 12-Fourth feeding device, 13-Center-driven high-efficiency thickener, 14-Ceramic filter. Detailed Implementation

[0017] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments.

[0018] Please refer to Figures 1-2 A magnesium reduction system for platinum group metal concentrate beneficiation includes a grinding system, a flotation system, and a thickening and filtration system connected in sequence. The grinding system includes a feeding device 1, a ball mill 2, and a spiral classifier 3 connected in sequence. The flotation system includes a first feeding device 4, a stirring storage tank 5, a first flotation device 6, a tailings discharge device 8, a second feeding device 7, a second flotation device 10, and a slurry return device 9 connected in sequence via pipelines. The thickening and filtration system includes a third feeding device 11, a center-driven high-efficiency thickener 13, a fourth feeding device 12, and a ceramic filter 14 connected in sequence via pipelines. The spiral classifier 3 is equipped with a lifting screw. Coarse-grained minerals settle at the bottom of the tank and are lifted and carried into the ball mill 2 for further grinding by the rotation of the lifting screw. Fine-grained minerals form a slurry and are discharged from the outlet into a pipeline connected to the flotation system.

[0019] Please refer to Figure 2The arrows in the diagram indicate the direction of material flow and pipeline connections. The specific working process of the system disclosed in this embodiment is as follows: Platinum group metal (PGM) copper-nickel sulfide ore, produced by the Nelson concentrator, is fed into the ball mill 2 via the feeding device 1 for closed-loop grinding. The ground slurry is discharged into the spiral classifier 3. Coarse particles in the slurry are returned to the ball mill 2 for further grinding via the rotating lifting screw within the spiral classifier 3. After the fine particles in the slurry are controlled to a fineness of 70%-200 mesh, they are transported to the mixing and storage tank 5 via the first feeding device 4 through a pipeline. Appropriate amounts of collector xanthate and frother pine oil are added to the mixing and storage tank 5. After the slurry concentration is adjusted to 25%, it flows into the first flotation unit 6 by gravity. The flotation foam is conveyed to the second flotation unit 10 via the second feeding device 7. The flotation tailings are discharged as waste by the tailings discharge device 8. The flotation tailings of the second flotation unit 10 are returned to the mixing storage tank 5 by the slurry pump return device 9 and then re-enter the first flotation unit 6 for flotation. The flotation foam of the second flotation unit 10 is conveyed to the center-driven high-efficiency thickener 13 via the third feeding device 11 for concentration to 45%. Then, it is conveyed to the ceramic filter 14 via the fourth feeding device 12. Finally, a platinum group metal concentrate with a water content of less than 10% and a magnesium oxide content of less than 6% is obtained, thereby achieving the purpose of magnesium reduction.

[0020] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. For those skilled in the art, changes and variations are possible with this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A magnesium reduction system for platinum group metal concentrates, characterized in that: It includes a grinding system, a flotation system, and a concentration and filtration system connected in sequence; The grinding system includes a feeding device (1), a ball mill (2), and a spiral classifier (3) connected in sequence; the flotation system includes a first feeding device (4), a stirring storage tank (5), a first flotation device (6), a tailings discharge device (8), a second feeding device (7), a second flotation device (10), and a slurry return device (9) connected in sequence via pipelines; the thickening and filtration system includes a third feeding device (11), a center-driven high-efficiency thickener (13), a fourth feeding device (12), and a ceramic filter (14) connected in sequence via pipelines.

2. The magnesium reduction system for platinum group metal concentrate according to claim 1, characterized in that: The spiral classifier (3) is a high-weir spiral classifier, which is equipped with a lifting spiral rod, an overflow slurry outlet and a slag outlet. The slag outlet of the spiral classifier is connected to the ball mill, and the overflow slurry outlet of the spiral classifier is connected to the flotation system.

3. The magnesium reduction system for platinum group metal concentrates according to any one of claims 1-2, characterized in that: The ore feeding device (1) is a belt conveyor.

4. The magnesium reduction system for platinum group metal concentrates according to any one of claims 1-2, characterized in that: The first flotation device (6) and the second flotation device (10) are aerated flotation machines.

5. The magnesium reduction system for platinum group metal concentrates according to any one of claims 1-2, characterized in that: The first feeding device (4), the second feeding device (7), the third feeding device (11), the fourth feeding device (12), the slurry return device (9), and the tailings discharge device (8) are all commonly used slurry pumps.

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