Full-fraction ore washing, pre-selecting and sorting device for magnetite

Abstract

The utility model discloses a magnetite whole-size-fraction ore washing pre-separation device which comprises a raw ore bin, an electric vibration feeder, a first conveying belt, a double-layer ore washing screen, a second conveying belt, a third conveying belt, a pre-separation magnetic separator, a first magnetic pulley, a second magnetic pulley, a first ore separation box, a second ore separation box, a dewatering screen, a fifth conveying belt and an ore grinding bin. The electric vibration feeder is installed at an outlet in the bottom of the raw ore bin. The first conveying belt is arranged between a discharging port of the electric vibration feeder and a feeding port of the double-layer ore washing screen. A coarse grain discharging port of the double-layer ore washing sieve corresponds to the feeding end of the second conveying belt, a medium grain discharging port of the double-layer ore washing sieve corresponds to the feeding end of the third conveying belt, and a fine grain discharging port of the double-layer ore washing sieve corresponds to a feeding port of the preselection magnetic separator. According to the device, the purposes of stabilizing the production process and reducing the labor intensity of workers are achieved by optimizing the system process, waste rock can be comprehensively utilized, the overall value of ore can be improved, the ore dressing cost can be reduced, and energy consumption can be reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of ore dressing, in particular to a full-grain-grade ore washing pre-selection and separation device for magnetite. Background Art

[0002] Mines with complex geological conditions often contain chlorite and other impurities that are easy to become muddy in the surrounding rocks, resulting in high mud content in the raw ore. When the moisture content of the raw ore exceeds 5%, the raw ore with high mud content is easily blocked in the chute of the feeding system, the belt is unloaded, the electric vibration is blocked, the production process fluctuates, and the storage bin is compacted, and the storage capacity drops sharply.

[0003] Pre-selection is an important part of iron ore beneficiation. Pre-selection and tailings discarding is an important means to achieve "more crushing and less grinding" and "discarding as early as possible". For single magnetite, the application of pre-selection is becoming more and more mature. The pre-selection of magnetite is mainly used for coarse crushing products (-300mm) and medium crushing products (-75mm) using large-block dry magnetic separation and tailings discarding; fine crushing products (-12mm) use wet coarse-grained medium magnetic separator for pre-selection and tailings discarding. Pre-treating all particle sizes of ore, discarding waste rock, and enriching beneficial elements can not only comprehensively utilize waste rock and improve the overall value of ore, but also reduce beneficiation costs and save energy consumption. However, the existing pre-selection device has the following problems: the pre-selection only adopts large-block dry magnetic separation to discard the tailings of the coarsely crushed products (-350mm), and the large-block dry magnetic separation is not obvious for the fine-grained tailings of the products. The fine-grained products either enter the waste rock bin, resulting in an increase in the grade of the waste rock and a waste of resources; or enter the grinding bin, resulting in a decrease in the grade entering the grinding and an increase in the cost of ore dressing.

[0004] In view of this, it is necessary to design a magnetite full-size ore washing and pre-selection separation device to solve the above problems. Utility Model Content

[0005] The technical problem to be solved by the utility model is to provide a magnetite full-grain-grade ore washing, pre-selection and separation device with stable production and low cost.

[0006] In order to solve the above technical problems, the technical scheme adopted by the utility model is: it includes an ore bin, an electric vibrating feeder, a 1# conveyor belt, a double-layer ore washing screen, a 2# conveyor belt, a 3# conveyor belt, a pre-selection magnetic separator, a 1# magnetic pulley, a 2# magnetic pulley, a 1# ore separation box, a 2# ore separation box, a dewatering screen, a 5# conveyor belt and a grinding bin; the electric vibrating feeder is installed at the bottom outlet of the ore bin, and the 1# conveyor belt is arranged between the discharge port of the electric vibrating feeder and the feed port of the double-layer ore washing screen; the double-layer ore washing screen is provided with a coarse particle discharge port, a medium particle discharge port and a fine particle discharge port, and the coarse particle discharge port of the double-layer ore washing screen is connected to the 2# The feeding end of the conveyor belt is set correspondingly, the medium-particle discharge port is set correspondingly to the feeding end of the 3# conveyor belt, and the fine-particle discharge port is set correspondingly to the feeding port of the pre-selection magnetic separator; the discharge end of the 2# conveyor belt is set correspondingly to the 1# magnetic pulley and the 1# ore separation box, and the discharge end of the 3# conveyor belt is set correspondingly to the 2# magnetic pulley and the 2# ore separation box; the concentrate outlet of the pre-selection magnetic separator is set correspondingly to the feeding port of the dewatering screen, the concentrate outlet of the dewatering screen is set correspondingly to the feeding end of the 5# conveyor belt, and the discharge end of the 5# conveyor belt is set correspondingly to the grinding bin; the concentrate outlets of the 1# ore separation box and the 2# ore separation box are both facing the 5# conveyor belt.

[0007] Furthermore, a 4# conveyor belt, a 3# magnetic pulley and a 3# ore separation box are provided; the waste rock outlet of the 1# ore separation box is arranged corresponding to the feeding end of the 4# conveyor belt, and the 3# magnetic pulley and the 3# ore separation box are arranged corresponding to the discharging end of the 4# conveyor belt; the concentrate outlets of the 3# ore separation boxes are all opposite to the 5# conveyor belt.

[0008] Furthermore, a 6# conveyor belt and a waste rock bin are also provided; the waste rock outlets of the 2# ore separation box and the 3# ore separation box are both facing the 6# conveyor belt, and the discharge end of the 6# conveyor belt is arranged corresponding to the waste rock bin.

[0009] Furthermore, a tailings pump pool and a tailings pump are provided; the tailings outlet of the pre-selection magnetic separator is connected to the tailings pump pool, and the tailings pump pool is connected to the thickening tank through the tailings pump.

[0010] Furthermore, a dewatering pump pool and a dewatering pump are provided; the water outlet of the dewatering screen is connected to the dewatering pump pool, and the dewatering pump pool is connected to the filtrate pump pool through the dewatering pump.

[0011] The beneficial effects of adopting the above technical scheme are as follows: according to the mineral processing concept of "throwing away as early as possible", the utility model screens the ore in the original ore bin through a double-layer ore washing screen to obtain three particle size products, and performs dry or wet pre-selection operations respectively, so that the three particle size products can be pre-selected and sorted more accurately, and the waste rock and tailings with qualified grades are discarded in advance, which improves the grade entering the mill and the metal recovery rate, avoids the waste of mineral resources, saves the subsequent grinding power consumption, and reduces the mineral processing cost; through water washing and wet pre-selection magnetic separation, mud removal and tailings discarding, low-viscosity and high-grade ore is obtained and sent to the grinding bin, which can reduce the large amount of sanitation in the feeding system, chute blockage, electric vibration blockage, and compaction in the ore storage bin. The waste rock with a size of more than 3 mm discarded by water washing and dry pre-selection magnetic separation can be sold to the local building materials market as building materials, realizing non-mining benefits.

[0012] The utility model achieves the purpose of reducing the large amount of sanitation in the feeding system, chute blockage, electric vibration blockage, and compaction in the ore storage bin by optimizing the system process, stabilizing the production process, and reducing the labor intensity of workers; it is also beneficial to throw out waste rock in advance to enrich beneficial elements, which can not only comprehensively utilize waste rock and enhance the overall value of ore, but also reduce mineral processing costs and save energy consumption. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The utility model is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0014] Figure 1 It is a schematic diagram of the system structure of the utility model.

[0015] In the figure: raw ore bin 1, electric vibrating feeder 2, 1# conveyor belt 3, double-layer ore washing screen 4, 2# conveyor belt 5, 3# conveyor belt 6, pre-selection magnetic separator 7, 1# magnetic pulley 8, 2# magnetic pulley 9, 1# ore separation box 10, 2# ore separation box 11, dewatering screen 12, 4# conveyor belt 13, 3# magnetic pulley 14, 3# ore separation box 15, 5# conveyor belt 16, 6# conveyor belt 17, grinding bin 18, waste rock bin 19, tailings pump pool 20, tailings pump 21, dewatering pump pool 22, dewatering pump 23. DETAILED DESCRIPTION

[0016] Figure 1 As shown, the magnetite full-size ore washing and pre-selection and sorting device includes an ore bin 1, an electric vibrating feeder 2, a 1# conveyor belt 3, a double-layer ore washing screen 4, a 2# conveyor belt 5, a 3# conveyor belt 6, a pre-selection magnetic separator 7, a 1# magnetic pulley 8, a 2# magnetic pulley 9, a 1# separation box 10, a 2# separation box 11, a dewatering screen 12, a 5# conveyor belt 16, a grinding bin 18, a 4# conveyor belt 13, a 3# magnetic pulley 14, a 3# separation box 15, a 6# conveyor belt 17, a waste rock bin 19, a tailings pump pool 20, a tailings pump 21, a dewatering pump pool 22 and a dewatering pump 23.

[0017] Figure 1 As shown, in the present magnetite full-grade washing and pre-selection and separation device, the electric vibrating feeder 2 is installed at the bottom outlet of the raw ore bin 1, and several electric vibrating feeders 2 can be set as needed; the discharge port of the electric vibrating feeder 2 is set correspondingly to the feeding end of the 1# conveyor belt 3, and the discharge end of the 1# conveyor belt 3 is set correspondingly to the feeding port of the double-layer washing screen 4. The double-layer washing screen 4 is provided with a coarse particle discharge port, a medium particle discharge port and a fine particle discharge port, and the coarse particle discharge port of the double-layer washing screen 4 is set correspondingly to the feeding end of the 2# conveyor belt 5, the medium particle discharge port is set correspondingly to the feeding end of the 3# conveyor belt 6, and the fine particle discharge port is set correspondingly to the feeding port of the pre-selection magnetic separator 7.

[0018] Figure 1 As shown, in the present magnetite full-size ore washing pre-selection and sorting device, the concentrate outlet of the pre-selection magnetic separator 7 is arranged correspondingly to the feeding port of the dewatering screen 12, the concentrate outlet of the dewatering screen 12 is arranged correspondingly to the feeding end of the 5# conveyor belt 16, and the discharging end of the 5# conveyor belt 16 is arranged correspondingly to the grinding bin 18. The water outlet of the dewatering screen 12 is connected to the dewatering pump pool 22, and the dewatering pump pool 22 is connected to the filtrate pump pool through the dewatering pump 23. The tailings outlet of the pre-selection magnetic separator 7 is connected to the tailings pump pool 20, and the tailings pump pool 20 is connected to the thickening tank through the tailings pump 21.

[0019] Figure 1 As shown, in the present magnetite full-size ore washing and pre-selection and separation device, the discharge end of the 3# conveyor belt 6 is correspondingly provided with a 2# magnetic pulley 9 and a 2# separation box 11; the concentrate outlet of the 2# separation box 11 is directly opposite to the 5# conveyor belt 16, and the waste rock outlet of the 2# separation box 11 is directly opposite to the 6# conveyor belt 17, and the discharge end of the 6# conveyor belt 17 is correspondingly provided with a waste rock bin 19.

[0020] Figure 1 As shown, in the present magnetite full-size ore washing and pre-selection and separation device, the discharge end of the 2# conveyor belt 5 is correspondingly provided with a 1# magnetic pulley 8 and a 1# separation box 10; the concentrate outlet of the 1# separation box 10 is directly opposite to the 5# conveyor belt 16, and the waste rock outlet of the 1# separation box 10 is corresponding to the feeding end of the 4# conveyor belt 13; the discharge end of the 4# conveyor belt 13 is correspondingly provided with a 3# magnetic pulley 14 and a 3# separation box 15; the concentrate outlet of the 3# separation box 15 is directly opposite to the 5# conveyor belt 16, and the waste rock outlet of the 3# separation box 15 is directly opposite to the 6# conveyor belt 17.

[0021] The working principle of the magnetite full-grain-grade washing and pre-selection and sorting device is as follows: when in use, the raw ore is wet-screened through a double-layer washing screen 4 to obtain coarse, medium and fine-grained products. The coarse-grained product is subjected to a roughing selection and a scavenging selection to obtain a concentrate which is transported to the grinding bin 18 via the 5# conveyor belt 16, and the discarded waste rock is transported to the waste rock bin 19 via the 6# conveyor belt 17; the medium-grained product is subjected to a roughing selection to obtain a concentrate which is transported to the grinding bin 18 via the 5# conveyor belt 16, and the discarded waste rock is transported to the waste rock bin 19 via the 6# conveyor belt 17; the fine-grained product is subjected to a roughing selection and a dehydration to obtain a concentrate which is transported to the grinding bin 18 via the 5# conveyor belt 16, and the tailings are pumped to the thickening tank by the tailings pump 21.

[0022] Embodiment: Using the above device structure, each device is as follows:

[0023] One double-layer ore washing screen 4 adopts 36000×7300mm banana vibrating wet screen, 1# magnetic pulley 8 adopts 1200×1400mm permanent magnetic roller dry separator with field strength of 400mT, 2# magnetic pulley 9 adopts 1200×1200mm permanent magnetic roller dry separator with field strength of 350mT, 3# magnetic pulley 14 adopts 1200×1200mm permanent magnetic roller dry separator with field strength of 400mT; there are two pre-selection magnetic separators 7, both of which adopt 1230 downstream magnetic separators with magnetic field strength of 350mT; one dewatering screen 12 adopts 2448 linear screen with mesh size of 150; there are two dewatering pumps and two tailings pumps (one for use and one for backup), both of which adopt 100ZJ-50.

[0024] The method for using the magnetite full-grain-grade washing pre-selection and separation device specifically comprises the following steps:

[0025] 1) The 350-0 mm raw ore in the raw ore bin 1 is fed into the 1# conveyor belt 3 through the electric vibrating feeder 2, and is transported to the double-layer ore washing screen 4 by the 1# conveyor belt 3; after passing through the double-layer ore washing screen 4, the ore is divided into three products: 350-20 mm coarse particle size, 20-3 mm medium particle size, and 3-0 mm fine particle size.

[0026] 2) The double-layer ore washing screen 4 is sorted by the 1# magnetic pulley 8 of the head wheel of the 2# conveyor belt 5, and the waste rock thrown out by the 1# magnetic pulley 8 is swept and selected by the 3# magnetic pulley 14 of the 4# conveyor belt 13; the waste rock thrown out by the 3# magnetic pulley 14 is transported to the waste rock bin 19 via the 6# conveyor belt 17; the concentrate recovered by the 1# magnetic pulley 8 and the 3# magnetic pulley 14 is transported to the grinding bin 18 via the 5# conveyor belt 16.

[0027] 3) The intermediate product of the double-layer ore washing screen 4 is sorted by the 2# magnetic pulley 9 of the 3# conveyor belt 6, the waste rock thrown out by the 2# magnetic pulley 9 is transported to the waste rock bin 19 via the 6# conveyor belt 17, and the concentrate recovered by the 2# magnetic pulley 9 is transported to the grinding bin 18 via the 5# conveyor belt 16.

[0028] 4) The tailings from the double-layer ore washing screen 4 are separated by the pre-selection magnetic separator 7. The tailings selected by the pre-selection magnetic separator 7 enter the tailings pump pool 20 and are pumped to the thickening pool by the tailings pump 21. The concentrate selected by the pre-selection magnetic separator 7 is dehydrated by the dewatering screen 12 and transported to the grinding bin 18 by the 5# conveyor belt 16. The water from the dewatering screen 12 enters the dewatering pump pool 22 and is pumped to the filtrate pump pool by the dewatering pump 23.

Claims

1. A magnetite full-size ore washing and pre-selection separation device, characterized in that: It comprises an ore bin (1), an electric vibrating feeder (2), a No. 1 conveyor belt (3), a double-layer ore washing screen (4), a No. 2 conveyor belt (5), a No. 3 conveyor belt (6), a pre-selection magnetic separator (7), a No. 1 magnetic pulley (8), a No. 2 magnetic pulley (9), a No. 1 ore separation box (10), a No. 2 ore separation box (11), a dewatering screen (12), a No. 5 conveyor belt (16) and an ore grinding bin (18); the electric vibrating feeder (2) is installed at the bottom outlet of the ore bin (1); the No. 1 conveyor belt (3) is arranged between the discharge port of the electric vibrating feeder (2) and the feed port of the double-layer ore washing screen (4); the double-layer ore washing screen (4) is provided with a coarse particle discharge port, a medium particle discharge port and a fine particle discharge port; the coarse particle discharge port of the double-layer ore washing screen (4) and the feed end of the No. 2 conveyor belt (5) are connected to each other. The medium-grain discharge port is correspondingly arranged with the feeding end of the 3# conveyor belt (6), and the fine-grain discharge port is correspondingly arranged with the feeding port of the pre-selection magnetic separator (7); the discharge end of the 2# conveyor belt (5) is correspondingly arranged with the 1# magnetic pulley (8) and the 1# ore separation box (10), and the discharge end of the 3# conveyor belt (6) is correspondingly arranged with the 2# magnetic pulley (9) and the 2# ore separation box (11); the concentrate outlet of the pre-selection magnetic separator (7) is correspondingly arranged with the feeding port of the dewatering screen (12), the concentrate outlet of the dewatering screen (12) is correspondingly arranged with the feeding end of the 5# conveyor belt (16), and the discharge end of the 5# conveyor belt (16) is correspondingly arranged with the grinding bin (18); the concentrate outlets of the 1# ore separation box (10) and the 2# ore separation box (11) are both directly opposite to the 5# conveyor belt (16).

2. A magnetite full-size ore washing pre-selection and separation device according to claim 1, characterized in that: A 4# conveyor belt (13), a 3# magnetic pulley (14) and a 3# ore separation box (15) are also provided; the waste rock outlet of the 1# ore separation box (10) is arranged corresponding to the feeding end of the 4# conveyor belt (13), and the 3# magnetic pulley (14) and the 3# ore separation box (15) are arranged corresponding to the discharge end of the 4# conveyor belt (13); and the concentrate outlet of the 3# ore separation box (15) is directly opposite to the 5# conveyor belt (16).

3. A magnetite full-size ore washing pre-selection and separation device according to claim 2, characterized in that: A 6# conveyor belt (17) and a waste rock bin (19) are also provided; the waste rock outlets of the 2# ore separation box (11) and the 3# ore separation box (15) are both directly opposite to the 6# conveyor belt (17), and the discharge end of the 6# conveyor belt (17) is arranged corresponding to the waste rock bin (19).

4. A magnetite full-size ore washing, pre-selection and separation device according to claim 1, 2 or 3, characterized in that: A tailings pump pool (20) and a tailings pump (21) are also provided; the tailings outlet of the pre-selection magnetic separator (7) is connected to the tailings pump pool (20), and the tailings pump pool (20) is connected to the thickening pool via the tailings pump (21).

5. A magnetite full-size ore washing, pre-selection and separation device according to claim 1, 2 or 3, characterized in that: A dewatering pump pool (22) and a dewatering pump (23) are also provided; the water outlet of the dewatering screen (12) is connected to the dewatering pump pool (22), and the dewatering pump pool (22) is connected to the filtrate pump pool via the dewatering pump (23).

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