A highly efficient ore crushing and desliming system

Abstract

This utility model discloses a high-efficiency ore crushing and desliming system, including a raw ore stockpile, a heavy plate feeder, a jaw crusher, a four-layer linear vibrating screen, a first cone crusher, a single-layer vibrating screen, a second cone crusher, a second slurry tank, a second slurry pump, an intermediate stockpile, a ball mill, a first slurry tank, a first slurry pump, a first hydrocyclone, a third slurry tank, a third slurry pump, a second hydrocyclone, a thickener, and a fourth slurry pump. This utility model is designed for the development of high-mud ore in tropical rainforest regions. It can significantly improve the efficiency of ore crushing and conveying, enhance equipment uptime, and ultimately achieve the separate production of ore slime, which can be independently fed into a carbon leaching system. This improves the beneficiation indicators of high-mud gold ore and is of great significance for the efficient development of difficult-to-process high-mud ore in tropical rainforest regions. It also provides important reference for the crushing and development of similar ores.

Description

Technical Field

[0001] This utility model relates to the technical field of ore crushing and grinding equipment, specifically to a high-efficiency ore crushing, grinding and desliming system. Background Technology

[0002] With the continuous development of industry, the development and supply of mineral resources have become a fundamental condition for ensuring the development of national industry. However, the problem of scarce, fine, and complex mineral resources in my country has become increasingly serious, leading many Chinese mining companies to expand their operations overseas. In the development of low-grade gold mineral resources in tropical rainforest regions, large amounts of high-mud, oxidized ore are stored on the surface, which is highly susceptible to mud formation upon contact with water. Furthermore, the total rainfall in tropical rainforest regions can exceed 3500 mm. The combination of high-mud ore and heavy rainfall poses a significant challenge to the crushing and transportation of ore in the beneficiation process.

[0003] In such an environment, ore crushing systems, especially medium and fine crushing systems, are easily clogged by high-mud, wet ore, causing equipment to stick and discharge ports to become blocked. This renders the medium and fine crushing systems inoperable and forces them to shut down, requiring constant manual clearing of the discharge ports. Furthermore, when conveyor belts transport high-mud, high-wet ore, the ore on the belts is prone to slippage, resulting in extremely low operating rates (less than 60%) for the entire crushing and production system, significantly impacting production and enterprise efficiency. Utility Model Content

[0004] In view of the shortcomings of the existing technology, the present invention aims to provide a high-efficiency ore crushing and desliming system.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A high-efficiency ore crushing and desliming system includes a raw ore stockpile, a heavy plate feeder, a jaw crusher, a four-layer linear vibrating screen, a first cone crusher, a single-layer vibrating screen, a second cone crusher, a second slurry tank, a second slurry pump, an intermediate stockpile, a ball mill, a first slurry tank, a first slurry pump, a first hydrocyclone, a third slurry tank, a third slurry pump, a second hydrocyclone, a thickener, and a fourth slurry pump.

[0007] The feed inlet of the heavy plate feeder is connected to the raw ore stockpile, and the discharge outlet of the heavy plate feeder is connected to the feed inlet of the jaw crusher; the discharge outlet of the jaw crusher is connected to the feed inlet of the four-layer linear vibrating screen; the oversize material output outlets of the first and second screens of the four-layer linear vibrating screen are connected to the inlet of the first cone crusher; the oversize material output outlet of the third screen of the four-layer linear vibrating screen is connected to the inlet of the single-layer vibrating screen; the undersize slurry output outlet of the four-layer linear vibrating screen is connected to the inlet of the second slurry tank; the second slurry tank is connected to the inlet of the first slurry tank via the second slurry pump.

[0008] The discharge port of the medium crushed product of the first cone crusher is connected to the inlet of the single-layer vibrating screen via a conveyor belt. The outlet of the oversize material of the single-layer vibrating screen is connected to the inlet of the second cone crusher via a conveyor belt. The discharge port of the fine crushed product of the second cone crusher is connected to the inlet of the single-layer vibrating screen.

[0009] The undersize material outlet of the single-layer vibrating screen and the oversize material outlet of the fourth screen of the four-layer linear vibrating screen are both connected to the entrance of the intermediate stockpile via conveyor belts. The outlet of the intermediate stockpile is connected to the entrance of the ball mill via a conveyor belt. The discharge outlet of the ball mill is connected to the entrance of the first slurry tank. The first slurry tank is connected to the feed port of the first hydrocyclone via the first slurry pump.

[0010] The underflow outlet of the first hydrocyclone is connected to the inlet of the ball mill, the overflow outlet of the first hydrocyclone is connected to the inlet of the third slurry tank, the outlet of the third slurry tank is connected to the feed port of the second hydrocyclone via the third slurry pump, the underflow outlet of the second hydrocyclone is connected to the flotation system, the overflow outlet of the second hydrocyclone is connected to the inlet of the thickener, the overflow outlet of the thickener is connected to the flotation return water system, and the underflow outlet of the thickener is connected to the fourth slurry pump, which is connected to the carbon leaching system.

[0011] Furthermore, rainproof canopies are installed above the raw ore stockpile, intermediate stockpile, and all conveyor belts.

[0012] Furthermore, the discharge opening width of the jaw crusher is 130mm; the discharge opening width of the medium crushed product of the first cone crusher is 45mm; and the discharge opening width of the fine crushed product of the second cone crusher is 15mm.

[0013] Furthermore, the first layer of the four-layer linear vibrating screen has an aperture of 80mm, the second layer has an aperture of 50mm, the third layer has an aperture of 16mm, and the fourth layer has an aperture of 2mm; the screen aperture of the four-layer linear vibrating screen is 2500mm long × 5000mm wide.

[0014] Furthermore, a row of flushing water pipes is provided on both sides of the top of the four-layer linear vibrating screen, and each row of flushing water pipes is provided with upper and lower layers; the diameter of the outlet of each flushing water pipe gradually decreases along the water outlet direction.

[0015] The beneficial effects of this utility model are as follows:

[0016] (1) In view of the difficulty in operating the crushing and conveying system of high mud content ore in the tropical rainforest with heavy rainfall and normal climate, this utility model adopts an improved four-layer linear vibrating screen. By designing screens of different sizes and setting flushing water pipes on both sides of the four-layer linear vibrating screen, the four-layer linear vibrating screen has the dual functions of screening and washing ore. The coarse and medium screens can screen coarse and medium particles for medium and fine crushing, and the fine screen can screen fine particles. Fine minerals are used for ball mill grinding, and the undersize ore is used for hydrocyclone classification. This realizes the branching crushing and desliming of multiple particle sizes, and solves the problem that the medium and fine crushing operation is stuck to the equipment by high mud wet ore and cannot operate.

[0017] (2) This utility model adds a wind and rain shelter to the raw ore pile, intermediate ore pile and conveyor belt, and with the washing function of the four-layer linear vibrating screen, it can greatly improve the conveying capacity of the conveyor belt and significantly improve the phenomenon of ore slipping back on the conveyor belt during heavy rain.

[0018] (3) This utility model achieves the function of secondary grading and desliming by adding a fourth slurry tank, a fourth slurry pump and a second hydrocyclone to the overflow port of the first hydrocyclone, thereby enhancing the effect of grading and desliming.

[0019] (4) In this utility model, after the second hydrocyclone classifies and deslims, the fine mud can be sent to the carbon leaching system for separate treatment after thickening and settling. This can solve the difficulty of flotation recovery of fine mud minerals. The overflow of the thickener can enter the flotation return water system without wasting water resources. The underflow of the secondary classification is sent to the flotation system, which can reduce the coverage of fine mud on the surface of minerals, reduce the mud and increase the flotation concentration, thereby helping to improve the flotation recovery rate and achieve efficient recovery of high mud gold ore.

[0020] (5) This utility model is designed for the development of high-mud ore in tropical rainforest areas. It can greatly improve the efficiency of ore crushing and ore conveying, effectively improve the equipment operating rate, increase the equipment operating rate from 60% to 85%, increase the daily ore processing capacity from 7,500 tons to 10,625 tons, and finally realize the separate production of ore slime, which can be independently fed into the carbon leaching system. It helps to improve the beneficiation index of high-mud gold ore and is of great significance for the efficient development of difficult-to-process high-mud ore in tropical rainforest areas. It can also provide important reference for the crushing and development of similar ores. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the system structure in Embodiment 1 of this utility model.

[0022] Figure 2 This is a schematic diagram of the flushing water pipes on both sides of the four-layer linear vibrating screen in Embodiment 1 of this utility model. Detailed Implementation

[0023] The present invention will be further described below with reference to the accompanying drawings. It should be noted that this embodiment is based on the present technical solution and provides detailed implementation methods and specific operation processes, but the protection scope of the present invention is not limited to this embodiment.

[0024] Example 1

[0025] This embodiment provides a highly efficient ore crushing and desliming system, such as... Figure 1 As shown, the structure includes a raw ore stockpile, a heavy plate feeder 1, a jaw crusher 2, a four-layer linear vibrating screen 3, a first cone crusher 4, a single-layer vibrating screen 5, a second cone crusher 6, a second slurry tank 7, a second slurry pump 8, an intermediate stockpile 9, a ball mill 10, a first slurry tank 11, a first slurry pump 12, a first hydrocyclone 13, a third slurry tank 14, a third slurry pump 15, a second hydrocyclone 16, a thickener 17, and a fourth slurry pump 18.

[0026] The feed inlet of the heavy plate feeder 1 is connected to the raw ore stockpile, and the discharge outlet of the heavy plate feeder 1 is connected to the feed inlet of the jaw crusher 2; the discharge outlet of the jaw crusher 2 is connected to the feed inlet of the four-layer linear vibrating screen 3; the oversize material output outlets of the first and second screens of the four-layer linear vibrating screen 3 are connected to the inlet of the first cone crusher 4; the oversize material output outlet of the third screen of the four-layer linear vibrating screen 3 is connected to the inlet of the single-layer vibrating screen 5; the undersize slurry output outlet of the four-layer linear vibrating screen 3 is connected to the inlet of the second slurry tank 7; the second slurry tank 7 is connected to the inlet of the first slurry tank 11 through the second slurry pump 8.

[0027] The discharge port of the medium crushed product of the first cone crusher 4 is connected to the inlet of the single-layer vibrating screen 5 via a conveyor belt. The outlet of the oversize material of the single-layer vibrating screen 5 is connected to the inlet of the second cone crusher 6 via a conveyor belt. The discharge port of the fine crushed product of the second cone crusher 6 is connected to the inlet of the single-layer vibrating screen 5.

[0028] The undersize material outlet of the single-layer vibrating screen 5 and the oversize material outlet of the fourth screen of the four-layer linear vibrating screen 3 are both connected to the inlet of the intermediate stockpile 9 via conveyor belts. The outlet of the intermediate stockpile 9 is connected to the inlet of the ball mill 10 via conveyor belts. The discharge outlet of the ball mill 10 is connected to the inlet of the first slurry tank 11. The first slurry tank 11 is connected to the feed port of the first hydrocyclone 13 via the first slurry pump 12.

[0029] The underflow outlet of the first hydrocyclone 13 is connected to the inlet of the ball mill 10, the overflow outlet of the first hydrocyclone 13 is connected to the inlet of the third slurry tank 14, the outlet of the third slurry tank 14 is connected to the feed port of the second hydrocyclone 16 through the third slurry pump 15, the underflow outlet of the second hydrocyclone 16 is connected to the flotation system, the overflow outlet of the second hydrocyclone 16 is connected to the inlet of the thickener 17, the overflow outlet of the thickener 17 is connected to the flotation return water system, and the underflow outlet of the thickener 17 is connected to the fourth slurry pump 18, which is connected to the carbon leaching system.

[0030] The working principle of the above-mentioned efficient ore crushing and desliming system is as follows:

[0031] Raw ore is fed from the ore stockpile into the inlet of the heavy plate feeder 1. The discharge from the heavy plate feeder 1 is fed into the jaw crusher 2 for coarse crushing. The coarse crushed product from the jaw crusher 2 is conveyed by a conveyor belt to the feed port of the four-layer linear vibrating screen 3. The material oversize from the first and second screens of the four-layer linear vibrating screen 3 is conveyed by a conveyor belt to the first cone crusher 4 for medium crushing.

[0032] The fine crushed product from the second cone crusher 6, the oversize material from the third screen of the four-layer linear vibrating screen 3, and the medium crushed product from the first cone crusher 4 are all fed into a single-layer vibrating screen 5. The oversize material from the single-layer vibrating screen 5 is returned to the second cone crusher 6 for fine crushing via a conveyor belt. Therefore, the second cone crusher 6 and the single-layer vibrating screen 5 form a closed-circuit screening and crushing system. The undersize material from the single-layer vibrating screen 5 and the oversize material from the fourth screen of the four-layer linear vibrating screen 3 are combined and conveyed to the intermediate stockpile 9 via a conveyor belt.

[0033] The minerals in the intermediate stockpile 9 are conveyed to the ball mill 10 via a conveyor belt, and after being ground in the ball mill 10, they flow by gravity to the first slurry tank 11. The slurry undersize from the four-layer linear vibrating screen 3 flows by gravity to the second slurry tank 7, and the second slurry pump 8 pumps the slurry from the second slurry tank 7 to the first slurry tank 11.

[0034] The first slurry pump 12 pumps the slurry from the first slurry tank 11 to the first hydrocyclone 13 for classification. The underflow from the first hydrocyclone 13 flows by gravity into the ball mill 10 to form a closed-circuit grinding system, and the overflow from the first hydrocyclone 13 flows by gravity to the third slurry tank 14. The third slurry pump 15 pumps the slurry from the third slurry tank 14 to the second hydrocyclone 16 for further classification. The underflow from the second hydrocyclone 16 flows by gravity to the flotation system, and the overflow from the second hydrocyclone 16 flows by gravity to the thickener 17 for thickening.

[0035] The overflow from the thickener 17 enters the flotation return water system, and the underflow from the thickener 17 is pumped to the carbon leaching system by the fourth slurry pump 18 for carbon leaching.

[0036] In this embodiment, rainproof canopies are installed above the raw ore stockpile, intermediate stockpile 9, and all conveyor belts.

[0037] In this embodiment, the jaw crusher 2 is model C140, the first cone crusher 4 is model HST315, and the second cone crusher 6 is model HST250;

[0038] In this embodiment, the discharge port width of the jaw crusher 2 is 130mm; the discharge port width of the medium crushed product of the first cone crusher 4 is 45mm; and the discharge port width of the fine crushed product of the second cone crusher 6 is 15mm.

[0039] In this embodiment, the first layer of the four-layer linear vibrating screen 3 has a screen aperture of 80mm, the second layer has a screen aperture of 50mm, the third layer has a screen aperture of 16mm, and the fourth layer has a screen aperture of 2mm; the screen surface dimensions of the four-layer linear vibrating screen 3 are 2500mm long × 5000mm wide.

[0040] In this embodiment, as Figure 2 As shown, a row of flushing water pipes 19 is provided on both sides of the top of the four-layer linear vibrating screen 3. Each row of flushing water pipes 19 has two layers, upper and lower. The diameter of the outlet of each flushing water pipe 19 gradually decreases along the water outlet direction, which can increase the water pressure and enhance the flushing effect. When it is necessary to wash the ore inside the four-layer linear vibrating screen 3, the water source is turned on to supply water to the flushing water pipes 19 on both sides. The pressurized flushing water enters the four-layer linear vibrating screen 3 from both sides, which can effectively and thoroughly wash the ore inside the four-layer linear vibrating screen 3.

[0041] In this embodiment, the ball mill 10 is of model Ф5.5×8.65m, the first hydrocyclone 13 is of model FX-660, the second hydrocyclone 16 is of model FX350, and the thickener 17 is of model NT-45.

[0042] Example 2

[0043] This embodiment provides an application example of Embodiment 1. The raw ore has a mud content of 65% and a moisture content of 25%. The jaw crusher produces 80% of the product with a particle size of -130mm, the first cone crusher produces 85% of the product with a particle size of -40mm, and the second cone crusher produces 85% of the product with a particle size of -12mm. The final underflow concentration of the second hydrocyclone 16 is 35%, with a fineness of -0.075mm accounting for 75%; the overflow concentration of the second hydrocyclone 16 is 10%, with a fineness of -0.038mm accounting for 82%; and the underflow concentration of the thickener 17 is 30%.

[0044] Example 3

[0045] This embodiment provides another application example of Embodiment 1. The raw ore has a mud content of 68% and a moisture content of 27%. The final underflow concentration of the second hydrocyclone 16 is 36%, with 74% having a fineness of -0.075mm. The overflow concentration of the second hydrocyclone 16 is 12%, with 84% having a fineness of -0.038mm. The underflow concentration of the thickener 17 is 32%.

[0046] For those skilled in the art, various corresponding changes and modifications can be made based on the above technical solutions and concepts, and all such changes and modifications should be included within the protection scope of the claims of this utility model.

Claims

1. A highly efficient ore crushing and desliming system, characterized in that, It includes a raw ore stockpile, a heavy plate feeder, a jaw crusher, a four-layer linear vibrating screen, a first cone crusher, a single-layer vibrating screen, a second cone crusher, a second slurry tank, a second slurry pump, an intermediate stockpile, a ball mill, a first slurry tank, a first slurry pump, a first hydrocyclone, a third slurry tank, a third slurry pump, a second hydrocyclone, a thickener, and a fourth slurry pump; The feed inlet of the heavy plate feeder is connected to the raw ore stockpile, and the discharge outlet of the heavy plate feeder is connected to the feed inlet of the jaw crusher; the discharge outlet of the jaw crusher is connected to the feed inlet of the four-layer linear vibrating screen; the oversize material output outlets of the first and second screens of the four-layer linear vibrating screen are connected to the inlet of the first cone crusher; the oversize material output outlet of the third screen of the four-layer linear vibrating screen is connected to the inlet of the single-layer vibrating screen; the undersize slurry output outlet of the four-layer linear vibrating screen is connected to the inlet of the second slurry tank; the second slurry tank is connected to the inlet of the first slurry tank via the second slurry pump. The discharge port of the medium crushed product of the first cone crusher is connected to the inlet of the single-layer vibrating screen via a conveyor belt. The outlet of the oversize material of the single-layer vibrating screen is connected to the inlet of the second cone crusher via a conveyor belt. The discharge port of the fine crushed product of the second cone crusher is connected to the inlet of the single-layer vibrating screen. The undersize material outlet of the single-layer vibrating screen and the oversize material outlet of the fourth screen of the four-layer linear vibrating screen are both connected to the entrance of the intermediate stockpile via conveyor belts. The outlet of the intermediate stockpile is connected to the entrance of the ball mill via a conveyor belt. The discharge outlet of the ball mill is connected to the entrance of the first slurry tank. The first slurry tank is connected to the feed port of the first hydrocyclone via the first slurry pump. The underflow outlet of the first hydrocyclone is connected to the inlet of the ball mill, the overflow outlet of the first hydrocyclone is connected to the inlet of the third slurry tank, the outlet of the third slurry tank is connected to the feed port of the second hydrocyclone via the third slurry pump, the underflow outlet of the second hydrocyclone is connected to the flotation system, the overflow outlet of the second hydrocyclone is connected to the inlet of the thickener, the overflow outlet of the thickener is connected to the flotation return water system, and the underflow outlet of the thickener is connected to the fourth slurry pump, which is connected to the carbon leaching system.

2. The ore crushing and desliming system according to claim 1, characterized in that, Rainproof canopies are installed above the raw ore stockpile, intermediate stockpile, and all conveyor belts.

3. The ore crushing and desliming system according to claim 1, characterized in that, The jaw crusher has a discharge opening width of 130mm; the first cone crusher has a discharge opening width of 45mm for medium crushed products; and the second cone crusher has a discharge opening width of 15mm for fine crushed products.

4. The ore crushing and desliming system according to claim 1, characterized in that, The four-layer linear vibrating screen has a first-layer screen mesh size of 80mm, a second-layer screen mesh size of 50mm, a third-layer screen mesh size of 16mm, and a fourth-layer screen mesh size of 2mm; the screen surface dimensions of the four-layer linear vibrating screen are 2500mm long × 5000mm wide.

5. The ore crushing and desliming system according to claim 1, characterized in that, The top two sides of the four-layer linear vibrating screen are equipped with a row of flushing water pipes, and each row of flushing water pipes is set with upper and lower layers; the diameter of the water outlet of each flushing water pipe gradually decreases along the water outlet direction.

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