Horizontal configuration structure of large flotation machine in dressing plant

Abstract

The invention discloses a horizontal configuration structure of a large flotation machine in a dressing plant, belongs to the technical field of configuration of flotation machines, and solves the problem that the flotation machine with the size of more than 50m < 3 > is difficult to horizontally configure. The system comprises one or more operation platforms, each operation platform is used for ore dressing operation of one kind of metal, and an ore pulp stirring tank, a roughing unit, a primary scavenging unit, a secondary scavenging unit and a tertiary scavenging unit which are sequentially connected are arranged on each operation platform. The roughing unit, the primary scavenging unit, the secondary scavenging unit and the tertiary scavenging unit are located at the same horizontal height. First tanks of the roughing unit, the primary scavenging unit, the secondary scavenging unit and the third scavenging unit are slurry suction tanks; and the upper blade area of the impeller in the pulp suction tank is smaller than the lower blade area, so that pulp suction of the low-specific-speed upper blade and pulp circulation of the high-specific-speed lower blade are realized. The operation platform is simple in configuration, saves process links, is neat and attractive, occupies a small area, is clean in environment, and is convenient to operate and inspect.

Description

Technical Field

[0001] The invention belongs to the technical field of flotation machine configuration, and in particular relates to a horizontal configuration structure of a large-scale flotation machine in a ore dressing plant. Background Art

[0002] As mineral resources become increasingly scarce and the scale of mineral processing plants expands, the development of flotation machines towards large-scale, efficient, diversified and automated aspects has become inevitable. 3 The flotation machine has also been put into industrial practice.

[0003] The core component of the flotation machine is the impeller. Figure 3 As shown, the impeller is divided into upper blades 6 and lower blades 7. Air enters the area of ​​lower blades 7 from the hollow shaft 8. Lower blades 7 are responsible for circulating the slurry in the tank, dispersing air, etc., while the local negative pressure formed by upper blades 6 can suck the feed ore / mid-ore.

[0004] There are two main forms of operation configuration in the flotation process, namely, step configuration and horizontal configuration. In the step configuration, there is a certain height difference between each flotation operation, and the slurry flows to the next operation by gravity, and the intermediate ore between operations needs to be returned to the front operation by a pump. In the horizontal configuration, the flow of slurry and the return of intermediate ore are achieved by the pumping action of the self-priming slurry flotation machine.

[0005] Therefore, compared with the stepped configuration, the horizontal configuration can make the flotation machines for rough sweeping operations at the same level, with no drop in the operating platform, neat and beautiful, and easy to operate; in particular, it eliminates the return slurry pump and pump pool for the middling ore, saves space, reduces maintenance links, personnel positions, and makes the workshop cleaner.

[0006] However, despite the many advantages of horizontal configuration of flotation machines, for 50m 3 For the above flotation machines, the free liquid surface of the flotation machine is too far away from the impeller, the upper blades generate negative pressure, and the required suction force is too large, making it difficult to achieve horizontal configuration. 3 The above horizontal configuration of flotation machines has not yet been applied industrially. Summary of the invention

[0007] The purpose of this invention is to provide a large-scale flotation machine horizontal configuration structure in a ore dressing plant to solve the problem of 50m 3 The above flotation machines are difficult to configure horizontally.

[0008] The technical solution of the present invention is: a horizontal configuration structure of a large-scale flotation machine in a mineral processing plant, comprising one or more working platforms, each working platform is used for mineral processing of a metal, and a pulp stirring tank, a roughing unit, a primary scavenging unit, a secondary scavenging unit and a tertiary scavenging unit connected in sequence are arranged on the working platform, and the roughing unit, the primary scavenging unit, the secondary scavenging unit and the tertiary scavenging unit are at the same horizontal height; the first tanks of the roughing unit, the primary scavenging unit, the secondary scavenging unit and the tertiary scavenging unit are all slurry suction tanks; the upper blade area of ​​the impeller in the slurry suction tank is smaller than the lower blade area, so as to realize the upper blade sucking slurry at a low specific speed and the lower blade circulating slurry at a high specific speed.

[0009] As a further improvement of the present invention, the area of ​​the upper blades of the impeller in the slurry suction groove is 12-18% of the area of ​​the lower blades.

[0010] As a further improvement of the present invention, the roughing unit has a four-slot structure. Considering the large amount of slurry in the roughing operation, the second slot and the third slot of the roughing unit are both slurry suction slots.

[0011] As a further improvement of the present invention, the foam outlet of each flotation machine in the primary scavenging group is connected to the second trough of the roughing group; the foam outlet of each flotation machine in the secondary scavenging group is connected to the first trough of the primary scavenging group; the foam outlet of each flotation machine in the tertiary scavenging group is connected to the first trough of the secondary scavenging group.

[0012] As a further improvement of the present invention, the volume of the large flotation machine is greater than 50m 3 .

[0013] The beneficial effects of the present invention are as follows: the first troughs of the roughing unit, the primary scavenging unit, the secondary scavenging unit, and the tertiary scavenging unit are all slurry suction troughs, and the area ratio of the upper blade and the lower blade of the impeller of the flotation machine is limited, so that the slurry and the intermediate ore products can be slurried and flow by themselves, thereby realizing the horizontal configuration of the flotation machine, and the slurry pump pool and slurry pump can be omitted. Compared with the traditional flotation machine with a stepped structure, the present invention has a simple configuration, saves process links, the working platform is neat and beautiful, occupies a small area, the environment is clean, and it is convenient to operate and inspect, avoiding the problems of the slurry pump pool and slurry pump occupying a large area, having many maintenance points, and a poor environment. The present invention can be used for the mineral processing of a single metal, and can also be used for the mineral processing of multiple metals. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a plan layout diagram of a specific embodiment of the present invention; Figure 2 yes Figure 1 AA view in; Figure 3 It is a structural diagram of the flotation machine impeller.

[0015] In the figure: 1-slurry stirring tank; 2-roughing unit; 3-primary scavenging unit; 4-secondary scavenging unit; 5-tertiary scavenging unit; 6-upper blade; 7-lower blade; 8-hollow shaft; 9-primary cleaning unit; 10-secondary cleaning unit; 11-tertiary cleaning unit; 12-quaternary cleaning unit; 13-cyclone unit; 14-tower mill; 15-buffer stirring tank; 16-flotation machine intermediate box. DETAILED DESCRIPTION

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

[0017] Embodiment 1: The present invention is used for the "bimetallic" beneficiation operation of a certain difficult-to-select lead-zinc ore.

[0018] like Figure 1-3 As shown, a horizontal configuration structure of a large-scale flotation machine in a mineral processing plant comprises two working platforms, each of which is used for mineral processing of a metal, and the working platforms are provided with a slurry stirring tank 1, a roughing unit 2, a primary scavenging unit 3, a secondary scavenging unit 4 and a tertiary scavenging unit 5 which are connected in sequence, and the roughing unit 2, the primary scavenging unit 3, the secondary scavenging unit 4 and the tertiary scavenging unit 5 are at the same horizontal height; the first tanks of the roughing unit 2, the primary scavenging unit 3, the secondary scavenging unit 4 and the tertiary scavenging unit 5 are all slurry suction tanks; the roughing unit 2 is a four-tank structure, and the second tank and the third tank of the roughing unit 2 are all slurry suction tanks; the rest are direct current tanks; the area of ​​the upper blade 6 of the impeller in the slurry suction tank is 15% of the area of ​​the lower blade 7.

[0019] The foam outlet of each flotation machine in the primary scavenging unit 3 is connected to the second trough of the roughing unit 2; the foam outlet of each flotation machine in the secondary scavenging unit 4 is connected to the first trough of the primary scavenging unit 3; the foam outlet of each flotation machine in the tertiary scavenging unit 5 is connected to the first trough of the secondary scavenging unit 4.

[0020] Large flotation machines have a capacity greater than 50m 3 .

[0021] The entire flotation operation includes two operating platforms, namely the first operating platform and the second operating platform. Two rows of equipment are set up on the first operating platform, one row is the roughing and scavenging equipment for lead (including slurry stirring tank 1, roughing unit 2, primary scavenging unit 3, secondary scavenging unit 4, and tertiary scavenging unit 5), and the other row is the lead and zinc concentrating equipment (including the primary concentrating unit 9, the secondary concentrating unit 10, the tertiary concentrating unit 11 and the quaternary concentrating unit 12 connected in sequence, the tailings outlet of the secondary concentrating unit 10 is connected to the primary concentrating unit 9, the tailings outlet of the tertiary concentrating unit 11 is connected to the secondary concentrating unit 10, and the tailings outlet of the quaternary concentrating unit 12 is connected to the tertiary concentrating unit 11); a row of equipment is set up on the second operating platform, which is the roughing and scavenging equipment for zinc (including two slurry stirring tanks 1, roughing unit 2, primary scavenging unit 3, secondary scavenging unit 4, and tertiary scavenging unit 5 connected in sequence). The second operating platform is lower than the first operating platform.

[0022] A flotation machine intermediate box 16 is provided between the roughing unit 2 and the primary scavenging unit 3, between the primary scavenging unit 3 and the secondary scavenging unit 4, and between the secondary scavenging unit 4 and the tertiary scavenging unit 5. The tertiary scavenging unit 5 of lead is connected to the first slurry stirring tank 1 of zinc through the intermediate box 16.

[0023] The tailings outlet of the lead primary concentrator unit 9 is connected to the first tank of the lead roughing unit 2. The tailings outlet of the zinc primary concentrator unit 9 is connected to the second slurry stirring tank 1 of zinc.

[0024] The first tank of the primary cleaning unit 9 is a slurry suction tank.

[0025] The flotation machine models in each unit are arranged from front to back as follows: Lead roughing unit 2 (four-tank structure): XCF-70, XCF-70, XCF-70, KYF-70; Lead primary sweeping unit 3 (double tank structure): XCF-70, KYF-70; Lead secondary scavenging unit 4 (double tank structure): XCF-70, KYF-70; Lead three-stage sweeping unit 5 (double tank structure): XCF-70, KYF-70; Zinc roughing unit 2 (four-tank structure): XCF-100, XCF-100, XCF-100, KYF-100; Zinc primary scavenging unit 3 (double tank structure): XCF-100, KYF-100; Zinc secondary scavenging unit 4 (double tank structure): XCF-100, KYF-100; Zinc three-stage scavenging unit 5 (double tank structure): XCF-100, KYF-100; Lead primary concentrator unit 9 (three-tank structure): KYF-30, KYF-30, XCF-30; Lead secondary concentrator unit 10 (double tank structure): KYF-30, XCF-30; Lead tertiary concentrator unit 11 (double tank structure): KYF-30, XCF-30; Lead quaternary concentrator unit 12 (single tank structure): XCF-30; Zinc primary concentrator unit 9 (four-tank structure): KYF-30, KYF-30, KYF-30, XCF-30; Zinc secondary concentrator unit 10 (three-tank structure): KYF-30, KYF-30, XCF-30; Zinc tertiary concentrator unit 11 (double tank structure): KYF-30, XCF-30; Zinc quaternary concentrator unit 12 (single tank structure): XCF-30.

[0026] The impeller speed of the lead suction trough is 134~140r·min -1 , DC slot impeller speed is 133~135r·min -1 The impeller speed of zinc suction trough is 126~134r·min -1 , DC slot impeller speed is 115~117r·min -1 .

[0027] The beneficiation process is as follows: Roughing and scavenging of lead: On the first operating platform, the slurry enters the slurry stirring tank (Ф5000) 1, and after adding chemicals and stirring, it is sucked into the roughing unit 2 for roughing operation, and then sucked into the primary scavenging unit 3, the secondary scavenging unit 4, and the tertiary scavenging unit 5 for scavenging operation. The scavenging foam is returned to the previous operation in sequence through the slurry suction tank; Roughing and scavenging of zinc: On the second operating platform, the tertiary scavenging tailings of lead pass through two slurry mixing tanks (Ф4500) 1 in sequence, and after adding chemicals, mixing and slurry adjustment, they are sucked into the roughing unit 2 for roughing operation, and then sucked into the primary scavenging unit 3, the secondary scavenging unit 4, and the tertiary scavenging unit 5 for scavenging operation. The scavenging foam is returned to the previous operation in sequence through the slurry suction tank. The tertiary scavenging tailings of zinc are the final tailings; Concentration of lead and zinc: The lead and zinc rough concentrates enter the corresponding cyclone groups 13 respectively. After the rough concentrates are classified, the underflow flows by gravity to the corresponding tower mill (KLM-400) 14 for regrinding. The slurry overflows from the tower mill 14 by gravity to the corresponding buffer stirring tank (Ф3500) 15, and then flows by gravity to the corresponding primary concentration unit 9 and passes through the secondary concentration unit 10, the tertiary concentration unit 11 and the quaternary concentration unit 12 in turn for concentration operations to produce the final lead concentrate and zinc concentrate.

[0028] For lead circulation and zinc circulation, the first sweeping foam, second sweeping foam, third sweeping foam and first selection tail can be circulated by suction slurry gravity.

[0029] In this embodiment, by adopting a horizontal configuration structure, the height of the main factory building is saved by at least 4m.

Claims

1. A horizontal configuration structure of a large flotation machine in a ore dressing plant, characterized by: The invention comprises one or more working platforms, each of which is used for the beneficiation of a metal, and the working platforms are provided with a slurry stirring tank (1), a roughing machine (2), a primary scavenging machine (3), a secondary scavenging machine (4) and a tertiary scavenging machine (5) which are connected in sequence, and the roughing machine (2), the primary scavenging machine (3), the secondary scavenging machine (4) and the tertiary scavenging machine (5) are at the same horizontal height; The first troughs of the roughing unit (2), the primary scavenging unit (3), the secondary scavenging unit (4) and the tertiary scavenging unit (5) are all slurry suction troughs; The area of ​​the upper blade (6) of the impeller in the slurry suction groove is smaller than the area of ​​the lower blade (7).

2. The horizontal configuration structure of a large flotation machine in a ore dressing plant according to claim 1 is characterized in that: The area of ​​the upper blade (6) of the impeller in the slurry suction groove is 12-18% of the area of ​​the lower blade (7).

3. The horizontal configuration structure of a large flotation machine in a ore dressing plant according to claim 1 or 2, characterized in that: The roughing unit (2) is a four-slot structure, and the second slot and the third slot of the roughing unit (2) are both slurry suction slots.

4. The horizontal configuration structure of a large flotation machine in a ore dressing plant according to claim 3 is characterized in that: The foam outlet of each flotation machine in the primary scavenging unit (3) is connected to the second tank of the roughing unit (2); the foam outlet of each flotation machine in the secondary scavenging unit (4) is connected to the first tank of the primary scavenging unit (3); and the foam outlet of each flotation machine in the tertiary scavenging unit (5) is connected to the first tank of the secondary scavenging unit (4).

5. The horizontal configuration structure of a large flotation machine in a ore dressing plant according to claim 4, characterized in that: The volume of the large flotation machine is greater than 50m 3 .

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