Transferring and dry separation treatment method for lump ore

Abstract

The invention discloses a lump ore transferring and dry separation treatment method, and belongs to the technical field of mining. The laminated variable flow direction transfer and parallel dry separation technology is adopted, and two transfer stations, a plurality of sealing-tape machines and a dry separation workshop are arranged; the rock crushing station is connected with the P01C sealing-tape machine, the P01C sealing-tape machine is connected with the upper transfer station, the upper transfer station is connected with the dry separation workshop through the G01 sealing-tape machine, and the dry separation workshop is connected with the lower transfer station through the C01 sealing-tape machine and is connected with an earth surface dry separation stone pile through the K01 sealing-tape machine; the dry separation workshop is provided with a stock bin, three groove bottom discharging belt conveyors and three dry separation belt conveyors. The two transfer stations are arranged in a laminated manner, so that the occupied space of the transfer stations is reduced; through a parallel dry separation mode, large ore materials are distributed to a plurality of parallel dry separation adhesive tapes, and the thickness of a material layer and the running speed of an adhesive tape machine are reduced; the magnetic rollers at the heads of the dry separation sealing-tape machines are used for dry separation at the same time, and the dry separation effect is improved; the problems of lump ore transfer and dry separation under the limited space condition are solved.

Description

Technical Field

[0001] The present invention relates to a method for transporting and dry-separating large pieces of ore, specifically a method for transporting and dry-separating large pieces of ore under restricted space conditions, belonging to the field of mining technology. Background Art

[0002] In an open-pit mine, rock stripping is carried out by a belt rock-dumping process and discharged to the waste dump. After the rock is crushed and dry-separated by a semi-mobile crushing station, the dry-separated ore is recycled, and the dry-separated rock is transported to the waste dump through multiple rock-dumping belts and discharged by a dumper.

[0003] Dry-separation process: Before the semi-mobile crushing station is relocated, there are two stages of ore dry-separation. A magnetic roller is set under the head of the crusher discharge belt conveyor. The dry-separated ore is transported to Ore Yard 1 by the ore belt conveyor. The waste rock is discharged onto the second dry-separation belt conveyor for scavenging operation. The scavenged ore is transported to Ore Pile 2 by the belt conveyor. The dry-separation waste rock is transported to the waste dump by the rock-dumping belt conveyor P01B. This dry-separation system is a series dry-separation. The belt speed of the dry-separation belt exceeds 2 m / s. The feeding amount of a single magnetic roller is large, the material layer is thick, the dry-separation effect is poor, and the recovery rate is low. Summary of the Invention

[0004] The present invention aims to provide a method for transporting and dry-separating large pieces of ore, adopting the technology of stacked variable-flow transportation + parallel dry-separation of large pieces of ore, and using this technology to solve the problem of transporting and dry-separating large pieces of ore under restricted space conditions.

[0005] Technical concept of the present invention: Under restricted space conditions, two transfer stations are arranged in a stacked manner and a spare passage is reserved. The technology of stacked variable-flow transportation + parallel dry-separation of large pieces of ore is adopted to improve the ore recovery rate and reduce the occupied space.

[0006] A method for transporting and dry-separating large pieces of ore provided by the present invention adopts the technology of stacked variable-flow transportation + parallel dry-separation, and arranges two transfer stations, P01C belt conveyor, P01B belt conveyor, G01 belt conveyor, C01 belt conveyor, K01 belt conveyor and a dry-separation workshop; The rock crushing station is connected to the P01C belt conveyor, the P01C belt conveyor is connected to the upper P01C transfer station, the upper P01C transfer station is connected to the dry-separation workshop through the G01 belt conveyor, the dry-separation workshop is connected to the lower P01C transfer station through the C01 belt conveyor and connected to the surface dry-separation ore stockpile through the K01 belt conveyor; The middle of the P01C transfer station is a bunker, and an upper transfer station and a lower transfer station are respectively arranged above and below the bunker; The dry-separation workshop is provided with a bunker, three trough-bottom discharge belt conveyors and three dry-separation belt conveyors. The three trough-bottom discharge belt conveyors and the three dry-separation belt conveyors are all arranged in parallel, and a strong magnetic roller is provided at the head of the dry-separation belt conveyor; Stack two transfer stations to reduce the space occupied by the transfer stations; by means of parallel dry separation, distribute the large-piece ore materials to multiple parallel dry separation belts to reduce the thickness of the material layer and the running speed of the belt conveyor; utilize the magnetic drums at the heads of each dry separation belt conveyor to conduct dry separation simultaneously to improve the dry separation effect.

[0007] Further, the positional relationship of the belt conveyors is as follows: The G01 belt conveyor connects the upper transfer station of P01C and the dry separation workshop, the C01 belt conveyor connects the dry separation workshop and the lower transfer station, and the K01 belt conveyor connects the dry separation workshop and the surface ore yard; in the normal state of the dry separation workshop, the rock materials are transported from the upper transfer station of P01C to the dry separation workshop through the G01 belt conveyor, and are respectively fed to three trough-bottom discharge belt conveyors through the bins in the dry separation workshop, and then fed to the corresponding three dry separation belt conveyors by the three trough-bottom discharge belt conveyors. After being dry-separated by the strong magnetic drums at the heads of the three dry separation belt conveyors, the rocks return to the lower transfer station of P01C through the C01 belt conveyor, and then are transported to the waste dump through the P01B belt conveyor, and the ores are transported to the surface dry-separated ore pile through the K01 belt conveyor; when the dry separation workshop fails, the rock materials can directly reach the lower transfer station from the upper transfer station of P01C by adjusting the transfer station flap valve without passing through the G01 belt conveyor, the C01 belt conveyor and the dry separation workshop.

[0008] Further, reserve a standby channel for the material flow direction (which means to set up a standby material transfer channel between the upper transfer station and the lower transfer station). Under normal conditions, the materials are transferred from the upper transfer station to the dry separation workshop, and the materials after dry separation are transferred to the target location through the lower dry separation workshop. In the case of a failure of the dry separation workshop, the materials are directly transferred from the upper transfer station to the lower transfer station and transported to the target location.

[0009] Further, the process route during the treatment process is as follows: The rocks stripped by the crushing station are crushed by the semi-mobile crushing station, and after being processed by the P01C belt conveyor, the upper transfer station of P01C and the dry separation workshop, the ores are transported to the surface ore yard through the K01 belt conveyor, and the rocks are transferred to the lower transfer station of P01C through the C01 belt conveyor, and then transferred to the waste dump through the P01B belt conveyor.

[0010] Further, the lower part of the funnel at the head of the P01C belt conveyor is respectively connected to the 2# chute and the 1# chute. The bottom of the chute is provided with a flap valve. The bottom of the 1# chute is connected to the bin, and the bottom of the 2# chute is connected to the tail of the G01 belt conveyor.

[0011] Under normal conditions of the dry separation workshop, G01 belt conveyor, K01 belt conveyor, and C01 belt conveyor, close the 1# chute flap valve in the transfer station, open the 2# chute flap valve. The large-sized ore materials are transported to the dry separation workshop for treatment via the P01C belt conveyor, 2# chute, and G01 belt conveyor. The ore separated by dry separation is transported to the ground ore yard via the belt conveyor K01, and the waste rock products after dry separation are transferred from the C01 belt conveyor to the P01B belt conveyor and enter the waste dump.

[0012] Under the condition that the dry separation workshop or G01 belt conveyor, K01 belt conveyor, and C01 belt conveyor malfunction, close the 2# chute flap valve in the transfer station, open the 1# chute flap valve. The large-sized ore materials are directly fed to the P01B belt conveyor through the P01C belt conveyor and 1# chute and enter the waste dump.

[0013] The process of the large-sized ore material dry separation system is that the rock is transferred to the G01 belt conveyor via the P01C belt conveyor and transported to the silo in the dry separation workshop. There are three trough bottom discharge belt conveyors arranged at the lower part of the dry separation silo. The materials are transported to the corresponding three dry separation belt conveyors via the trough bottom discharge belt conveyors for dry separation. The ore after dry separation is transported to the ground ore yard via the ore belt conveyor K01, and the rock after dry separation is transferred from the C01 belt conveyor to the P01B belt conveyor through the 4# chute and enters the waste dump.

[0014] Advantages of the present invention: Through the large-sized ore laminated variable-flow transfer + parallel dry separation technology, the present invention solves the problems of large-sized ore transfer + dry separation under limited space conditions, realizes the purpose of adjustable flow direction of large-sized ore materials and improved dry separation effect, and has huge economic benefits. Description of the drawings

[0015] Figure 1 It is the layout plan of the large-sized ore transfer station and dry separation workshop of the present invention; Figure 2 It is the design drawing of the large-sized ore laminated transfer station of the present invention; Figure 3 It is Figure 2 side view; Figure 4 It is the design drawing of the large-sized ore parallel dry separation workshop of the present invention; Figure 5 It is Figure 4 top view; Figure 6 It is Figure 4 side view; Figure 7 It is the comparison schematic diagram before and after the transformation of the dry separation system.

[0016] In the figure: 1 is the P01C belt conveyor, 2 is the upper transfer station, 3 is the G01 belt conveyor, 4 is the dry separation workshop, 5 is the C01 belt conveyor, 6 is the lower transfer station, 7 is the K01 belt conveyor, 8 is the head hopper of the P01C belt conveyor, 9 is the transfer station bunker, 10 is the dry separation workshop bunker, 11 is the trough bottom discharge belt conveyor, 12 is the dry separation belt conveyor, 13 is the P01B belt conveyor, 14 is the No. 1 chute, 15 is the flap valve, 16 is the No. 2 chute, 17 is the No. 4 chute. Specific implementation mode

[0017] The present invention will be further described below through embodiments, but is not limited to the following embodiments. Embodiment

[0018] A certain mine needs to arrange two large ore transfer stations and a dry separation workshop in an available space of only 35×130 meters, which is extremely difficult. Moreover, in the existing dry separation system, the belt speed of the ore belt exceeds 4 m / s, the feeding volume of a single magnetic drum is large, the material layer is thick, the dry separation effect is not very ideal, and the recovery rate is low.

[0019] In view of the above situation, a large ore laminated variable-flow transfer + parallel dry separation technology provided by the present invention is adopted. By arranging the two transfer stations in a laminated manner, the space occupied by the transfer stations is reduced; by means of parallel dry separation, the large ore materials are distributed to multiple parallel dry separation belts, reducing the material layer thickness and the belt conveyor running speed; the magnetic drums at the heads of each dry separation belt conveyor are used for dry separation simultaneously to improve the dry separation effect; a spare channel is reserved for the material flow direction. Under normal conditions, the materials are transferred from the upper transfer station to the dry separation workshop, and the dry-separated materials are transported to the target location through the lower dry separation workshop transfer station. In the case of a dry separation workshop failure, the materials are directly transferred from the upper transfer station to the lower transfer station and transported to the target location.

[0020] To improve the recovery rate of the ore, the mine needs to arrange two transfer stations, the head of the P01C belt conveyor, the tail of the P01B belt conveyor, the G01 belt conveyor, the C01 belt conveyor, the K01 belt conveyor and the dry separation workshop in an available space of 35×130 meters. The specific method adopted is as follows: As Figures 1 to 7As shown in the figure, a dry separation treatment method for the transfer of large ore blocks provided in this embodiment adopts a laminated variable-flow transfer + parallel dry separation technology, and arranges two transfer stations, P01C belt conveyor 1, P01B belt conveyor 13, G01 belt conveyor 3, C01 belt conveyor 5, K01 belt conveyor 7 and dry separation workshop 4; the rock crushing station is connected to P01C belt conveyor 1, P01C belt conveyor 1 is connected to the upper P01C transfer station 2, the upper P01C transfer station 2 is connected to the dry separation workshop 4 through G01 belt conveyor 3, and the dry separation workshop 4 is connected to the lower P01C transfer station 6 through C01 belt conveyor 5 and to the surface dry separation ore stockpile through K01 belt conveyor 7; the middle of the P01C transfer station is the transfer station bunker 9, and the upper transfer station 2 and the lower transfer station 6 are respectively arranged above and below the bunker; the dry separation workshop 4 is provided with a dry separation workshop bunker 10, three bottom discharge belt conveyors 11 and three dry separation belt conveyors 12. The three bottom discharge belt conveyors 11 and the three dry separation belt conveyors 12 are all arranged in parallel, and a strong magnetic roller is provided at the head of the dry separation belt conveyor 12. The two transfer stations are arranged in a laminated manner to reduce the space occupied by the transfer stations; a bunker is arranged between the upper and lower transfer stations to realize adjustable flow direction of large rock materials. The original series dry separation process is changed to a parallel dry separation process, which effectively improves the dry separation effect on the premise of reducing the floor area. Through the parallel dry separation method, the large ore materials are distributed to multiple parallel dry separation belts, reducing the thickness of the material layer and the running speed of the belt conveyor; the magnetic rollers at the heads of each dry separation belt conveyor are used for dry separation at the same time to improve the dry separation effect.

[0021] As Figure 1 shown in the figure, the process route during the treatment is: the rock stripped by the crushing station is crushed by the semi-mobile crushing station, and after being processed by the P01C belt conveyor, the upper P01C transfer station and the dry separation workshop, the ore is transported to the ground ore yard through the K01 belt conveyor, and the rock is transferred to the lower P01C transfer station through the C01 belt conveyor and then transferred to the waste dump through the P01B belt conveyor.

[0022] From Figure 1 , Figure 2 the perspective of, the positional relationship of the layout of each belt conveyor is: G01 belt conveyor 3 connects the upper P01C transfer station 2 and the dry separation workshop 4, C01 belt conveyor 5 connects the dry separation workshop 4 and the lower transfer station 6, and K01 belt conveyor 7 connects the dry separation workshop 4 and the ground ore yard. As Figure 3 shown in the figure, the lower part of the funnel at the head of the P01C belt conveyor is respectively connected to the 2# chute 16 and the 1# chute 14. A flap valve 15 is provided at the bottom of the chute. The bottom of the 1# chute 14 is connected to the bunker, and the bottom of the 2# chute 16 is connected to the tail of the G01 belt conveyor 3.

[0023] As Figures 4 to 6As shown in the figure, under normal conditions in the dry separation workshop, rock materials are transported from the upper transfer station of P01C to the dry separation workshop through the G01 belt conveyor, and are fed into three bottom discharge belt conveyors of the dry separation workshop through the silos of the dry separation workshop. The three bottom discharge belt conveyors feed the materials to the corresponding three dry separation belt conveyors. After dry separation treatment by the strong magnetic drums at the heads of the three dry separation belt conveyors, the rocks return to the lower transfer station of P01C through the C01 belt conveyor, and then are transported to the waste dump through the P01B belt conveyor. The ore is transported to the surface dry separation ore pile through the K01 belt conveyor. When the dry separation workshop fails, the rock materials can directly reach the lower transfer station from the upper transfer station of P01C by adjusting the flap valve of the transfer station, without passing through the G01 belt conveyor, the C01 belt conveyor and the dry separation workshop.

[0024] Furthermore, a spare material transfer channel is provided between the upper transfer station and the lower transfer station. Under normal conditions, the materials are transferred from the upper transfer station to the dry separation workshop, and the materials after dry separation are transferred to the target location through the lower dry separation workshop. In the case of a failure of the dry separation workshop, the materials are directly transferred from the upper transfer station to the lower transfer station and transported to the target location.

[0025] Specifically, as Figures 1 to 3 shown, when the dry separation workshop, the G01 belt conveyor, the K01 belt conveyor and the C01 belt conveyor are normal, close the flap valve 15 of the 1# chute 14 in the transfer station, open the flap valve of the 2# chute 16, and the large block ore materials are transported to the dry separation workshop 4 for treatment through the P01C belt conveyor 1, the 2# chute 16 and the G01 belt conveyor 3. The ore after dry separation is transported to the ground ore yard through the K01 belt conveyor 7, and the waste rock products after dry separation are transferred to the P01B belt conveyor 13 through the C01 belt conveyor 5 and enter the waste dump.

[0026] In the case of a failure of the dry separation workshop or the G01 belt conveyor, the K01 belt conveyor and the C01 belt conveyor, close the flap valve of the 2# chute in the transfer station, open the flap valve of the 1# chute, and the large block ore materials are directly fed to the P01B belt conveyor through the P01C belt conveyor and the 1# chute and enter the waste dump.

[0027] The process flow of the large block ore material dry separation system is that the rock is transferred to the G01 belt conveyor through the P01C belt conveyor, transported to the silo of the dry separation room, and there are three bottom discharge belt conveyors arranged under the dry separation silo. The materials are transported to the corresponding three dry separation belt conveyors for dry separation through the bottom discharge belt conveyors. The ore after dry separation is transported to the ground ore yard through the ore belt conveyor K01, and the rock after dry separation is transferred to the P01B belt conveyor through the 4# chute by the C01 belt conveyor and enters the waste dump.

[0028] Table 1 Process parameter table of each belt conveyor

[0029] As Figure 7As shown in the figure on the left, in the original dry separation system, a magnetic drum is installed under the head of the discharge belt conveyor of the crusher. The dry-separated ore is transported to the ore yard 1 by the ore belt conveyor (belt speed: 2.1 m / s, belt width: 2.4 m). The waste rock is discharged onto the second dry-separation belt conveyor (belt speed: 2.5 m / s, belt width: 2 m) for scavenging operation. The scavenged ore is transported to the ore yard 2 by the belt conveyor, and the dry-separation waste rock is transported to the waste dump by the waste rock discharge belt conveyor P01B. After the transformation using the method of the present invention, as Figure 7 shown in the figure on the right, the rock material crushed by the crusher is transported to the dry separation workshop by the G01 belt conveyor through the upper transfer station of P01C, and is respectively transported to the three bottom discharge belt conveyors through the bins in the dry separation workshop. The three bottom discharge belt conveyors feed the corresponding three dry separation belt conveyors (belt speed: 1 m / s, belt width: 1.6 m). After dry separation treatment by the high-intensity magnetic drums at the heads of the three dry separation belt conveyors, the rock returns to the lower transfer station of P01C through the C01 belt conveyor, and then is transported to the waste dump through the P01B belt conveyor. The ore is transported to the surface dry-separated ore stockpile by the K01 belt conveyor; the remaining parameters are shown in Table 1. The ore recovery rate of the method of the present invention can reach 4.5%.

[0030] The present invention realizes the variable-flow transfer of large pieces of ore in a stacked layer + parallel dry separation, solves the technical problems of large piece ore transfer + dry separation within a space of 35×130 meters in a certain mine, increases the dry separation recovery rate by 47.7% (nearly 50%), and creates an annual efficiency of 40 million yuan.

Claims

1. A bulk ore transfer dry separation method, characterized in that: Adopting stacked variable flow transfer + parallel dry separation technology, two transfer stations, P01C belt conveyor, P01B belt conveyor, G01 belt conveyor, C01 belt conveyor, K01 belt conveyor and dry separation workshop are arranged; the rock crushing station is connected to the P01C belt conveyor, the P01C belt conveyor is connected to the P01C upper transfer station, the P01C upper transfer station is connected to the dry separation workshop through the G01 belt conveyor, the dry separation workshop is connected to the P01C lower transfer station through the C01 belt conveyor, and is connected to the surface dry separation ore stockpile through the K01 belt conveyor; the middle part of the P01C transfer station is a silo, and the upper transfer station and the lower transfer station are respectively set above and below the silo; The dry sorting workshop is equipped with a silo and three trough bottom discharge belt conveyors and three dry sorting belt conveyors. The three trough bottom discharge belt conveyors and three dry sorting belt conveyors are arranged in parallel. The head of the dry sorting belt conveyor is equipped with a strong magnetic roller. The two transfer stations are stacked to reduce the space occupied by the transfer stations; large pieces of ore materials are distributed to multiple parallel dry-separation belts through parallel dry-separation, reducing the thickness of the material layer and the running speed of the belt conveyor; the magnetic rollers at the head of each dry-separation belt conveyor are used to carry out dry separation at the same time to improve the dry separation effect.

2. The bulk ore transfer dry separation method according to claim 1 is characterized in that: The position relationship of the belt conveyor arrangement is as follows: the G01 belt conveyor connects the P01C upper transfer station and the dry separation workshop, the C01 belt conveyor connects the dry separation workshop and the lower transfer station, and the K01 belt conveyor connects the dry separation workshop and the ground ore yard; in the normal state of the dry separation workshop, the rock material is transported from the P01C upper transfer station to the dry separation workshop through the G01 belt conveyor, and is fed to the three trough bottom discharge belt conveyors through the silo of the dry separation workshop, and is fed to the corresponding three trough bottom discharge belt conveyors by the three trough bottom discharge belt conveyors. After the rock is processed by the strong magnetic drum at the head of the three dry-selection belt conveyors, it returns to the P01C lower transfer station through the C01 belt conveyor, and then is transferred to the dumping yard through the P01B belt conveyor. The ore is transported to the surface dry-selection ore pile through the K01 belt conveyor. When the dry-selection workshop fails, the rock material can be directly transferred from the P01C upper transfer station to the lower transfer station by adjusting the transfer station gate valve, without passing through the G01 belt conveyor, C01 belt conveyor and dry-selection workshop.

3. The bulk ore transfer dry separation method according to claim 1 is characterized in that: A spare material transfer channel is set between the upper transfer station and the lower transfer station. Under normal conditions, materials are transferred from the upper transfer station to the dry sorting workshop, and the dry-sorted materials are transferred to the target location via the lower dry sorting workshop. In the event of a failure in the dry sorting workshop, materials are directly transferred from the upper transfer station to the lower transfer station and transported to the target location.

4. The bulk ore transfer dry separation method according to claim 1 is characterized in that: The process route during the treatment process is: the rock stripped from the crushing station is crushed by the semi-mobile crushing station, and then processed by the P01C belt conveyor, P01C upper transfer station, and dry sorting workshop. The ore is transported to the ground ore yard through the K01 belt conveyor, and the rock is transferred to the P01C lower transfer station through the C01 belt conveyor, and then transferred to the spoil dump through the P01B belt conveyor.

5. The bulk ore transfer dry separation method according to claim 1 is characterized in that: The bottom of the P01C belt conveyor head hopper is connected to the 2# chute and the 1# chute respectively. A gate valve is provided at the bottom of the chute. The bottom of the 1# chute is connected to the silo, and the bottom of the 2# chute is connected to the tail of the G01 belt conveyor.

6. The bulk ore transfer dry separation method according to claim 5 is characterized by: When the dry sorting workshop and G01 belt conveyor, K01 belt conveyor and C01 belt conveyor are operating normally, close the 1# chute gate valve in the transfer station, open the 2# chute gate valve, and the large pieces of ore materials are transported to the dry sorting workshop for processing via the P01C belt conveyor, 2# chute and G01 belt conveyor. The dry sorted ore is transported to the ground ore yard via belt conveyor K01, and the waste rock products after dry sorting are transferred from the C01 belt conveyor to the P01B belt conveyor and enter the spoil yard.

7. The bulk ore transfer dry separation method according to claim 5 is characterized by: In case of failure of the dry sorting workshop or G01 belt conveyor, K01 belt conveyor, or C01 belt conveyor, close the 2# chute gate valve in the transfer station, open the 1# chute gate valve, and the large pieces of ore materials are directly fed to the P01B belt conveyor through the P01C belt conveyor and the 1# chute and enter the spoil yard.

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