High-value utilization production system for gold-bearing mining waste rocks

Abstract

The utility model discloses a production system for high-value utilization of gold-bearing mining waste rocks. The waste rocks are coarsely crushed by a jaw crusher, intermediately crushed by a cone crusher, checked and screened by a vibrating screen and the like, and then crushed waste rocks are produced and enter a pre-selection bin. Crushed waste rocks in a bin before separation are firstly fed into a first-section ore washing sieve, oversize products are fed into a photoelectric separator to be subjected to dry separation treatment, part of ores with the gold grade being 1-2 g / t can be selected to serve as raw ores for gold separation production, and tailings obtained after dry separation are sold as pebbles. And undersize materials of the first-section ore washing sieve are fed into a second-section ore washing sieve. Oversize products of the second-stage ore washing sieve are sold as stones, undersize slurry is fed into a table gravity separation system to be treated, raw ore for gold ore dressing production can be produced through gravity separation, and gravity separation tailings are fed into a spiral classifier to be subjected to classification treatment. The method is used for treating gold mine mining waste rocks with the gold grade of 0.3-0.5 g / t, part of valuable metal is recycled from the waste rocks, the rest of valuable metal can be used as building gravel aggregate for sale, and high-value utilization of the mining waste rocks is achieved.

Description

Technical Field

[0001] The utility model relates to a comprehensive processing system for gold-containing mining waste rocks, which is mainly used for processing gold-containing mining waste rocks which have no grinding and flotation value. Background Art

[0002] my country is a major mining country, and the amount of waste rock generated by mining is huge every year. Because the content of valuable elements in waste rock is extremely low, it is usually stored and disposed of by mines or used to prepare building materials after simple crushing. The large amount of accumulation of mining waste rock not only seriously affects the comprehensive utilization level of mineral resources, but also causes serious harm to the environment, because the accumulation of waste rock not only occupies a large amount of land but also causes serious damage to the soil environment.

[0003] In theory, the materials produced by crushing gold-bearing mining waste rock can be re-selected to recover some valuable elements. However, in actual production, it is difficult to achieve high-value utilization due to the low comprehensive recovery rate of valuable elements in waste rock. Utility Model Content

[0004] The technical problem to be solved by the utility model is to provide a high-value utilization production system for gold-containing mining waste rock, which is used to process gold mining waste rock with a gold content of 0.3-0.5g / t, recover part of the valuable metals from the waste rock, and the remaining part can be used as building sand and gravel aggregate for sale, thereby realizing high-value utilization of mining waste rock.

[0005] The technical solution of the utility model is as follows:

[0006] A production system for high-value utilization of gold-containing mining waste rock, including a jaw crusher and a cone crusher both with open upper ends, a buffer silo and a pre-selection silo both with open upper ends and discharge ports at the bottom, a photoelectric sorter with a feed port opening upward, a vibrating screen, a first-stage ore washing screen and a second-stage ore washing screen, a shaking table group and a spiral classifier, the jaw crusher and the cone crusher are respectively equipped with chutes, the discharge ports of the chutes are both located above the feed end of the conveyor belt of the 1# belt conveyor, the drop end of the conveyor belt of the 1# belt conveyor is located above the upper port of the buffer silo; the bottom discharge port of the buffer silo is located above the vibrating screen; the vibrating screen is equipped with a chute for exporting materials on the screen, the discharge port of the chute is located above the feed end of the conveyor belt of the 2# belt conveyor, and the 2# belt conveyor is The dropping end of the conveyor belt of the machine is located above the upper port of the cone crusher; the discharge port of the undersize product of the vibrating screen is located above the feed end of the conveyor belt of the 3# belt conveyor, and the dropping end of the conveyor belt of the 3# belt conveyor is located above the upper port of the pre-selection silo; the bottom discharge port of the pre-selection silo is located above the feed end of the conveyor belt of the 4# belt conveyor, and the dropping end of the conveyor belt of the 4# belt conveyor is located above the first-stage ore washing screen; the first-stage ore washing screen is equipped with a chute for exporting the products on the screen, and the discharge port of the chute is located above the feed port of the photoelectric sorter; the discharge port of the undersize product of the first-stage ore washing screen is located above the second-stage ore washing screen; the discharge port of the undersize product of the second-stage ore washing screen is connected to the shaking table group; the discharge end of the re-selection tailings of the shaking table group is connected to the feed end of the spiral classifier.

[0007] Preferably, the under-screen product discharge port of the second-stage ore washing screen is connected to a pump pool through a pipeline; the pump pool is connected to the shaking table group through a slurry pump.

[0008] Preferably, the gravity separation tailings discharge end of the shaking table group is connected to a gravity separation tailings discharge pipe, and the discharge end of the gravity separation tailings discharge pipe is connected to the feed end of the spiral classifier.

[0009] Preferably, the spiral classifier has a feed port opening upward; the discharge end of the gravity separation tailings of the shaking table group is connected to a chute; and the discharge port of the chute is located above the feed port of the spiral classifier.

[0010] Preferably, the mesh size of the first stage ore washing screen is smaller than the mesh size of the vibrating screen and larger than the mesh size of the second stage ore washing screen.

[0011] The positive effects of the utility model are:

[0012] The system of the utility model implements treatment measures including crushing, screening, ore washing, dry separation and re-selection for mining waste rock of gold mines, and reasonably combines these measures to produce about 20% yield of ore with a gold grade of 1-2g / t and a small amount of ore mud with a gold grade of 2-3g / t from mining waste rock with a gold grade of about 0.3-0.5g / t, which can be used for mineral processing. Other remaining materials are sold as gravel and washed sand for construction. Experiments show that compared with concrete prepared with limestone coarse aggregate and river sand, concrete prepared with gravel produced by the utility model has better working performance and higher compressive strength.

[0013] The system of the utility model is used to process mining waste rock. The system operation cost is low, and more than 50% of the gold in the waste rock can be recovered. Under the current high gold price, the potential economic benefits are huge. The remaining stones and washed sand can all be sold out, and there is no problem of waste rock storage occupying the site and polluting the environment, and the social benefits are obvious. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural schematic diagram of an embodiment of the utility model.

[0015] In the figure, 1, jaw crusher, 2, cone crusher, 3-1, 1# belt conveyor, 3-2, 2# belt conveyor, 3-3, 3# belt conveyor, 3-4, 4# belt conveyor, 4-1, buffer silo, 4-2, pre-selection silo, 5-1, vibrating screen, 5-2, first-stage ore washing screen, 5-3, second-stage ore washing screen, 6, photoelectric sorting machine, 7, pump pool, 8, slurry pump, 9, shaking table group, 10, spiral classifier. DETAILED DESCRIPTION

[0016] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0017] like Figure 1 The embodiment of the system of the utility model includes a jaw crusher 1 and a cone crusher 2 for crushing gold-containing mining waste rock with an open upper end, a 1# belt conveyor 3-1, a 2# belt conveyor 3-2, a 3# belt conveyor 3-3 and a 4# belt conveyor 3-4 for transporting crushed waste rock or screened products, a buffer silo 4-1 and a pre-selection silo 4-2 for buffering and storing waste rock with an open upper end and a discharge port at the bottom, a vibrating screen 5-1 for checking and screening the crushed waste rock, a first-stage ore washing screen 5-2 and a second-stage ore washing screen 5-3 for screening and desludging the waste rock after crushing, an optoelectronic separator 6 with an upwardly opening feed port, a downwardly opening stone outlet and a downwardly opening ore outlet, a pump pool 7 and a slurry pump 8 for conveying sediment, a shaking table group 9 for re-selecting the washed sediment, and a spiral classifier 10 for classifying the shaking table tailings.

[0018] The jaw crusher 1 and the cone crusher 2 are respectively equipped with chutes, and the discharge ports of the chutes are both located above the feed end of the conveyor belt of the 1# belt conveyor 3-1, and the discharge end of the conveyor belt of the 1# belt conveyor 3-1 is located above the upper port of the buffer bin 4-1. The bottom discharge port of the buffer bin 4-1 is located above the vibrating screen 5-1. The vibrating screen 5-1 is equipped with a chute for exporting the material on the screen, and the discharge port of the chute is located above the feed end of the conveyor belt of the 2# belt conveyor 3-2, and the discharge end of the conveyor belt of the 2# belt conveyor 3-2 is located above the upper port of the cone crusher 2.

[0019] The discharge port of the vibrating screen 5-1 for the under-screen products is located above the feed end of the conveyor belt of the 3# belt conveyor 3-3, and the discharge end of the conveyor belt of the 3# belt conveyor 3-3 is located above the upper port of the pre-selection bin 4-2. The bottom discharge port of the pre-selection bin 4-2 is located above the feed end of the conveyor belt of the 4# belt conveyor 3-4, and the discharge end of the conveyor belt of the 4# belt conveyor 3-4 is located above the first-stage ore washing screen 5-2. The first-stage ore washing screen 5-2 is equipped with a chute for exporting the over-screen products, and the discharge port of the chute is located above the feed port of the photoelectric sorter 6.

[0020] The discharge port of the under-screen product of the first-stage ore-washing screen 5-2 is located above the second-stage ore-washing screen 5-3, and the discharge port of the under-screen product of the second-stage ore-washing screen 5-3 is connected to the pump pool 7 through a pipeline. The pump pool 7 is connected to the slurry pump 8 through a pipeline, and the slurry pump 8 is connected to the shaking table group 9 through a pipeline.

[0021] The shaking table group 9 is provided with a discharge pipe for the gravity-separation tailings, and the discharge end of the discharge pipe for the gravity-separation tailings is connected to the feed end of the spiral classifier 10. The gravity-separation tailings of the shaking table group 9 can also flow into the spiral classifier 10 by gravity through a chute.

[0022] The final products of the photoelectric separator 6 are gravel and ore. The screen product of the second-stage ore washing screen 5-3 is gravel. The concentrate product of the shaking table group 9 is heavy sand. The return sand of the spiral classifier 10 is water-washed sand, and the overflow of the spiral classifier 10 is fine mud.

[0023] In the system embodiment of the utility model, the jaw crusher 1, the cone crusher 2, the 1# belt conveyor 3-1, the 2# belt conveyor 3-2 and the vibrating screen 5-1 constitute a complete two-stage one closed-circuit crushing system.

[0024] Furthermore, the mesh size of the first-stage ore-washing screen 5-2 is smaller than the mesh size of the vibrating screen 5-1 and larger than the mesh size of the second-stage ore-washing screen 5-3.

[0025] The following examples illustrate the workflow of the present utility model.

[0026] Mining waste rock (gold mine mining waste rock with a gold content of 0.3-0.5g / t after testing) is first fed into the jaw crusher 1 for coarse crushing, and the coarse crushed product is transferred to the buffer silo 4-1 via the 1# belt conveyor 3-1. The crushed stone in the buffer silo 4-1 is fed into the vibrating screen 5-1 for inspection and screening, and the screen hole size is 40*40mm. The above-screen product is transferred to the cone crusher 2 for medium crushing via the 2# belt conveyor 3-2, and the medium-crushed product is transferred to the buffer silo 4-1 via the 1# belt conveyor 3-1. The under-screen product of the vibrating screen 5-1 is a -40mm particle size crushed material, which is transferred to the pre-selection silo 4-2 for temporary storage via the 3# belt conveyor 3-3 for subsequent processing.

[0027] The crushed materials in the pre-selection silo 4-2 are transported by the 4# belt conveyor 3-4 to the first-stage ore washing screen 5-2 for ore washing and screening. The screened products are crushed stones with a particle size of +15-40mm, which are fed to the photoelectric separator 6 for dry sorting. The final products of the photoelectric separator 6 are stones and ores with a gold grade of 1-2g / t. The stones are sold as building materials, and the ores are used for ore dressing production. The under-screen products of the first-stage ore washing screen 5-2 are -15mm materials, which are fed to the second-stage ore washing screen 5-3. The screened products of the second-stage ore washing are stones with a particle size of +5-15mm, which can be sold as building materials. The under-screen products of the second-stage ore washing are mud mortar, which flows into the pump pool 7 through the pipeline. The mud mortar is then transported to the shaking table group 9 through the slurry pump 8 for re-selection. After the mud-sand slurry is re-selected by the shaking table group 9, heavy sand with a gold grade of 2-3g / t is produced for ore dressing production. The re-selected tailings are fed into the spiral classifier 10 through the chute for classification and desludging. The return sand of the spiral classifier 10 is washed sand, which can be sold as building materials, and the classification overflow is fine mud, which can be used as filling raw materials. In the above process, the vibrating screen and the ore washing screen can adjust the sieve hole size according to actual production needs.

Claims

1. A production system for high-value utilization of gold-containing mining waste rock, comprising a jaw crusher (1) and a cone crusher (2) both of which are open at the top, a buffer silo (4-1) and a pre-selection silo (4-2) both of which are open at the top and have discharge ports at the bottom, a photoelectric separator (6) with a feed port opening upward, a vibrating screen (5-1), a first-stage ore washing screen (5-2) and a second-stage ore washing screen (5-3), a shaking table group (9) and a spiral classifier (10), characterized in that: The jaw crusher (1) and the cone crusher (2) are respectively provided with chutes, the discharge ports of the chutes are both located above the feed end of the conveyor belt of the No. 1 belt conveyor (3-1), and the discharge end of the conveyor belt of the No. 1 belt conveyor (3-1) is located above the upper port of the buffer silo (4-1); the bottom discharge port of the buffer silo (4-1) is located above the vibrating screen (5-1); the vibrating screen (5-1) is provided with a chute for discharging the material on the screen, the discharge port of the chute is located above the feed end of the conveyor belt of the No. 2 belt conveyor (3-2), and the discharge end of the conveyor belt of the No. 2 belt conveyor (3-2) is located above the upper port of the cone crusher (2); the discharge port of the under-screen product of the vibrating screen (5-1) is located above the feed end of the conveyor belt of the No. 3 belt conveyor (3-3), The discharge end of the conveyor belt of the 3# belt conveyor (3-3) is located above the upper port of the pre-selection bin (4-2); the bottom discharge port of the pre-selection bin (4-2) is located above the feed end of the conveyor belt of the 4# belt conveyor (3-4), and the discharge end of the conveyor belt of the 4# belt conveyor (3-4) is located above the first-stage ore washing screen (5-2); the first-stage ore washing screen (5-2) is equipped with a chute for discharging the above-screen product, and the discharge port of the chute is located above the feed port of the photoelectric separator (6); the discharge port of the under-screen product of the first-stage ore washing screen (5-2) is located above the second-stage ore washing screen (5-3); the discharge port of the under-screen product of the second-stage ore washing screen (5-3) is connected to the shaking table group (9); and the discharge end of the re-selection tailings of the shaking table group (9) is connected to the feed end of the spiral classifier (10).

2. The high-value utilization production system of gold-containing mining waste rock according to claim 1 is characterized by: The under-screen product discharge port of the second-stage ore washing screen (5-3) is connected to a pump pool (7) via a pipeline; the pump pool (7) is connected to the shaking table group (9) via a slurry pump (8).

3. The high-value utilization production system of gold-containing mining waste rock according to claim 1 is characterized in that: The gravity separation tailings discharge end of the shaking table group (9) is connected to a gravity separation tailings discharge pipe, and the discharge end of the gravity separation tailings discharge pipe is connected to the feed end of the spiral classifier (10).

4. The high-value utilization production system of gold-containing mining waste rock according to claim 1 is characterized in that: The spiral classifier (10) has a feed port opening upward; the discharge end of the gravity separation tailings of the shaking table group (9) is connected to a chute; the discharge port of the chute is located above the feed port of the spiral classifier (10).

5. The high-value utilization production system of gold-containing mining waste rock according to any one of claims 1 to 4, characterized in that: The mesh size of the first-stage ore-washing screen (5-2) is smaller than the mesh size of the vibrating screen (5-1) and larger than the mesh size of the second-stage ore-washing screen (5-3).

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