Non-conventional ore pulp loop conveying method for non-ferrous metal flotation zinc-sulfur mixed flotation roughing operation

Abstract

The invention discloses an unconventional ore pulp loop conveying method for non-ferrous metal flotation zinc-sulfur mixed flotation roughing operation, which comprises the following steps: arranging a three-groove flotation machine for roughing operation in the roughing operation, enabling a foam product after roughing to flow into fine selection operation, and enabling an underflow product after roughing to flow into scavenging operation; foam products obtained after scavenging are conveyed into a second-tank XCF flotation machine in the three-tank flotation machines through a scavenging foam pipeline; underflow products obtained after concentration are conveyed into a first-groove XCF flotation machine in the three-groove flotation machines through a concentration underflow pipeline, and meanwhile roughing feeding ore pulp is conveyed into the first-groove XCF flotation machine in the three-groove flotation machines through a pipeline. The scavenging foam products are independently sucked into the second-tank XCF flotation machine for roughing operation, the suction pressure of the first-tank XCF flotation machine is divided, and the roughing speed of the scavenging foam products and the concentration underflow products is increased. The problems that a scavenging overflow tank and a scavenging foam tank are overflowed, and foam products cannot be completely sucked by the XCF flotation machine to return to roughing operation in time are solved.

Description

Technical Field

[0001] The invention belongs to the technical field of nonferrous metal ore flotation, in particular to an unconventional ore pulp loop conveying method for nonferrous metal flotation zinc-sulfur mixed flotation roughing operation. Background Art

[0002] The flotation system of a non-ferrous lead, zinc and sulfur polymetallic mine in East China originally adopted a priority flotation process to select lead, zinc, sulfur and other polymetallics in turn. Later, due to the technical transformation of the process, a new green low-carbon zinc-sulfur flotation process was adopted to achieve early tailings, no sulfuric acid, low lime and efficient zinc and sulfur selection. In the industrial test production process, the scavenging tank overflowed and the scavenging foam tank was often overflowed. The foam product could not be completely sucked back to the roughing operation through the XCF slurry suction type aerated mechanical stirring flotation machine in time, and sometimes even affected the ore discharge operation of the selected bottom flow product, resulting in low quality of the concentrate product and high tailings product run-off. Through investigation, research and analysis, the engineering and technical personnel believe that ① due to the change in the product structure of the new process mixed roughing, the roughing yield has increased, resulting in an increase in the amount of scavenging foam products and the amount of selected bottom flow products; ② the sulfur grade of the raw ore fluctuates widely, with the maximum of 12%-24%, and the fluctuation range is 100%, which causes a sudden increase in the roughing yield, an increase in the amount of selected, and an increase in the selected bottom flow products; at the same time, the sudden increase in the roughing yield also causes an increase in the roughing bottom flow products, an increase in scavenging foam products, and insufficient roughing suction, which cannot completely suck the three products of roughing feed, selected bottom flow, and scavenging foam into the roughing operation, resulting in the above problems. Therefore, it is necessary to invent a new non-ferrous metal flotation zinc-sulfur mixed flotation roughing operation unconventional slurry circuit transportation method to solve the above process and product problems. Summary of the invention

[0003] The technical problem to be solved by the present invention is to provide an unconventional pulp loop conveying method for non-ferrous metal flotation zinc-sulfur mixed flotation roughing operation in view of the deficiencies of the above-mentioned prior art. The unconventional pulp loop conveying method for non-ferrous metal flotation zinc-sulfur mixed flotation roughing operation configures XCF flotation machines in the first and second slots of the three-slot flotation machine respectively, and the foam product after the scavenging operation is sucked into the roughing operation by the second slot XCF flotation machine alone, which diverts the suction pressure of the XCF flotation machine configured in the first slot, thereby simultaneously accelerating the speed of the scavenging foam product and the selected bottom flow product entering the roughing operation, and can completely suck the three products of roughing feed, selected bottom flow, and scavenging foam into the roughing operation. Thus, the scavenging overflowing slot and the scavenging foam slot are solved, and the foam product cannot be completely and timely sucked back to the roughing operation through the XCF flotation machine, and sometimes even affects the ore discharge operation of the selected bottom flow product, resulting in low quality of the concentrate product and high tailings product run.

[0004] In order to achieve the above technical objectives, the technical solution adopted by the present invention is:

[0005] An unconventional pulp loop conveying method for non-ferrous metal flotation zinc-sulfur mixed flotation roughing operation, comprising:

[0006] In the zinc-sulfur mixed flotation roughing operation of non-ferrous metal flotation, a three-tank flotation machine is set to perform roughing operation, wherein the three-tank flotation machine includes a first-tank XCF flotation machine, a second-tank XCF flotation machine and a third-tank KYF flotation machine which are connected in sequence, the first-tank XCF flotation machine is connected to the roughing feed pipeline and the cleaning underflow pipeline respectively, and the second-tank XCF flotation machine is connected to the scavenging foam pipeline;

[0007] The roughing feed pipeline conveys the feed ore pulp to the first XCF flotation cell among the three-cell flotation cells. The first XCF flotation cell, the second XCF flotation cell and the third KYF flotation cell among the three-cell flotation cells perform roughing operation at the same time. The foam product after the roughing operation flows into the cleaning operation, and the underflow product after the roughing operation flows into the scavenging operation.

[0008] The foam product after the scavenging operation is transported to the second tank XCF flotation machine in the three-tank flotation machine through the scavenging foam pipeline;

[0009] The underflow product after the cleaning operation is transported to the first-tank XCF flotation machine in the three-tank flotation machine through the cleaning underflow pipeline.

[0010] As a further improved technical solution of the present invention, the underflow outlet of the three-tank flotation machine is used to transport the underflow product after the roughing operation, and a roughing underflow discharge gate is provided on the underflow outlet.

[0011] As a further improved technical solution of the present invention, the underflow outlet of the three-tank flotation machine is arranged at the bottom of the tank body of the third tank KYF flotation machine.

[0012] As a further improved technical solution of the present invention, the cell volume of the first tank XCF flotation machine is 2.8 cubic meters, 4 cubic meters or 8 cubic meters, the cell volume of the second tank XCF flotation machine is 2.8 cubic meters, 4 cubic meters or 8 cubic meters, and the cell volume of the third tank KYF flotation machine is 2.8 cubic meters, 4 cubic meters or 8 cubic meters.

[0013] As a further improved technical solution of the present invention, the first tank XCF flotation machine and the second tank XCF flotation machine are both XCF slurry suction type aerated mechanical stirring flotation machines, and the third tank KYF flotation machine is a KYF aerated mechanical stirring flotation machine.

[0014] As a further improved technical solution of the present invention, the diameter of the roughing feed pipe is 100 mm, 150 mm or 200 mm.

[0015] As a further improved technical solution of the present invention, the diameter of the selected underflow pipe is 100 mm, 150 mm or 200 mm.

[0016] As a further improved technical solution of the present invention, the diameter of the scanning foam pipe is 100 mm, 150 mm or 200 mm.

[0017] In the present invention, when three-tank flotation machines are used for roughing operation, the first tank and the second tank are equipped with XCF flotation machines at the same time (i.e., the first tank XCF flotation machine and the second tank XCF flotation machine), and the third tank is equipped with KYF flotation machine (i.e., the third tank KYF flotation machine), that is, an XCF slurry suction type aerated mechanical stirring flotation machine is configured in the first tank, and the XCF slurry suction type aerated mechanical stirring flotation machine is continued to be used in the second tank, and the scavenging foam product is sucked into the roughing operation by the XCF slurry suction type aerated mechanical stirring flotation machine configured in the second tank alone, and the roughing feed and the selected underflow products are sucked into the roughing operation by the XCF slurry suction type aerated mechanical stirring flotation machine configured in the first tank together. A two-tank XCF slurry suction type aerated mechanical stirring flotation machine and a one-tank KYF aerated mechanical stirring flotation machine are used in combination, and the feed slurry circuit enters the first tank and the second tank respectively.

[0018] The beneficial effects of the present invention are:

[0019] The present invention continues to use the XCF slurry suction type aerated mechanical stirring flotation machine in the second tank, and sucks the foam product after the scavenging operation into the three-tank flotation machine in the roughing operation through the scavenging foam pipeline by the XCF slurry suction type aerated mechanical stirring flotation machine configured in the second tank (i.e., the second tank XCF flotation machine), and sucks the roughing feed and the selected underflow products into the three-tank flotation machine in the roughing operation by the XCF slurry suction type aerated mechanical stirring flotation machine configured in the first tank (i.e., the first tank XCF flotation machine). A two-tank XCF slurry suction type aerated mechanical stirring flotation machine and a one-tank KYF aerated mechanical stirring flotation machine are used in combination, and the feed slurry circuit enters the first tank and the second tank of the three-tank flotation machine respectively. By diverting the slurry volume pressure of the XCF slurry suction type aerated mechanical stirring flotation machine configured in the first trough, the speed of the scavenging foam product and the selected bottom flow product entering the roughing is accelerated, thereby solving the scavenging overflowing trough and the overflowing of the scavenging foam trough, and solving the problem that the foam product cannot be completely and timely sucked back to the roughing operation through the XCF slurry suction type aerated mechanical stirring flotation machine, affecting the ore discharge operation of the selected bottom flow product, resulting in low quality of the concentrate product and high tailings. The effective output of the mixed roughing product is achieved, which is conducive to the effective separation of the subsequent mixed products and the control of the tailings in the subsequent scavenging operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 The present invention is a structural schematic diagram of an unconventional slurry loop conveying method for non-ferrous metal flotation zinc-sulfur mixed flotation roughing operation. DETAILED DESCRIPTION

[0021] The specific embodiments of the present invention are further described below according to the accompanying drawings:

[0022] like Figure 1 As shown, an unconventional pulp loop conveying method for non-ferrous metal flotation zinc-sulfur mixed flotation roughing operation includes:

[0023] In the zinc-sulfur mixed flotation roughing operation of non-ferrous metal flotation, a three-tank flotation machine 1 is set to perform roughing operation, wherein the three-tank flotation machine 1 includes a first tank XCF flotation machine 101, a second tank XCF flotation machine 102 and a third tank KYF flotation machine 103 which are connected in sequence, the first tank XCF flotation machine 101 is connected to the roughing feed pipeline 2 and the cleaning underflow pipeline 3 respectively, and the second tank XCF flotation machine 102 is connected to the scavenging foam pipeline 4;

[0024] The roughing feed pipeline 2 conveys the feed ore pulp to the first slot XCF flotation machine 101 in the three-slot flotation machine 1. The first slot XCF flotation machine 101, the second slot XCF flotation machine 102 and the third slot KYF flotation machine 103 in the three-slot flotation machine 1 perform roughing operation at the same time. The foam product after the roughing operation flows into the cleaning operation, and the underflow product after the roughing operation flows into the scavenging operation.

[0025] The foam product after the scavenging operation is transported to the second tank XCF flotation machine 102 in the three-tank flotation machine 1 through the scavenging foam pipeline 4;

[0026] The underflow product after the cleaning operation is transported to the first tank XCF flotation machine 101 in the three-tank flotation machine 1 through the cleaning underflow pipeline 3.

[0027] The underflow outlet of the three-tank flotation machine 1 is used to transport the underflow product after the roughing operation, and a roughing underflow discharge gate 1031 is provided on the underflow outlet.

[0028] The underflow outlet of the three-tank flotation machine 1 is arranged at the bottom of the tank body of the third tank KYF flotation machine 103 .

[0029] In this embodiment, the cell volume of the first trough XCF flotation machine 101 is 2.8 cubic meters, 4 cubic meters or 8 cubic meters, the cell volume of the second trough XCF flotation machine 102 is 2.8 cubic meters, 4 cubic meters or 8 cubic meters, and the cell volume of the third trough KYF flotation machine 103 is 2.8 cubic meters, 4 cubic meters or 8 cubic meters. Specifically, the cell volume of the first trough XCF flotation machine 101, the second trough XCF flotation machine 102 and the third trough KYF flotation machine 103 in this embodiment is 8 cubic meters.

[0030] The first-tank XCF flotation machine 101 and the second-tank XCF flotation machine 102 are both XCF slurry suction type aerated mechanical agitation flotation machines, namely XCF-8 slurry suction type aerated mechanical agitation flotation machines, and the third-tank KYF flotation machine 103 is a KYF aerated mechanical agitation flotation machine, namely KYF-8 aerated mechanical agitation flotation machine.

[0031] The diameter of the roughing feed pipe 2 is 100 mm, 150 mm or 200 mm. It is used to input the feed slurry into the first tank XCF flotation machine 101. The diameter of the cleaning underflow pipe 3 is 100 mm, 150 mm or 200 mm. It is used to input the underflow product after the cleaning operation into the first tank XCF flotation machine 101. The diameter of the scavenging foam pipe 4 is 100 mm, 150 mm or 200 mm. It is used to input the foam product after the scavenging operation into the second tank XCF flotation machine 102. Specifically, in this embodiment, the pipe diameters of the roughing feed pipe 2, the cleaning underflow pipe 3 and the scavenging foam pipe 4 are 200 mm.

[0032] The first slot XCF flotation machine 101 and the second slot XCF flotation machine 102 are both equipped with XXKW motors, and the XXKW motors include 11KW, 15KW, 22KW, 30KW and other power numbers that match the flotation machines. The third slot KYF flotation machine 103 is equipped with an XXKW motor, and the XXKW motors include 11KW, 15KW and other power numbers that match the flotation machines. Specifically, in this embodiment, the first slot XCF flotation machine 101 and the second slot XCF flotation machine 102 are equipped with 22KW motors. The third slot KYF flotation machine 103 is equipped with a 15KW motor.

[0033] In this embodiment, when the three-tank flotation machine is in roughing operation, the first tank and the second tank are equipped with XCF flotation machines at the same time, and the third tank is equipped with KYF flotation machine, that is, the first tank is equipped with XCF slurry suction type aerated mechanical stirring flotation machine, and the second tank is continued to use XCF slurry suction type aerated mechanical stirring flotation machine, and the foam product after the scavenging operation is sucked into the roughing operation by the XCF slurry suction type aerated mechanical stirring flotation machine configured in the second tank (that is, the second tank XCF flotation machine), and the bottom flow product after the roughing feed and the cleaning operation is sucked into the roughing operation by the XCF slurry suction type aerated mechanical stirring flotation machine configured in the first tank (that is, the first tank XCF flotation machine). A two-tank XCF slurry suction type aerated mechanical stirring flotation machine and a one-tank KYF aerated mechanical stirring flotation machine are used in combination, and the feeding slurry circuit enters the first tank and the second tank of the three-tank flotation machine 1 respectively.

[0034] The above-mentioned three-tank flotation machine 1 is used in the roughing operation of zinc-sulfur mixed flotation of non-ferrous metals, and the specific structure is as follows: the underflow outlet of the three-tank flotation machine 1 is connected to the scavenging operation component in the scavenging operation, and the underflow product is transported to the scavenging operation component in the scavenging operation through the underflow outlet and the roughing underflow discharge gate 1031. The foam tank of the three-tank flotation machine 1 is connected to the concentrating operation component in the concentrating operation, and the foam product of the three-tank flotation machine 1 is transported to the concentrating operation component in the concentrating operation through the foam tank and the pipeline. The first tank XCF flotation machine, the second tank XCF flotation machine and the third tank KYF flotation machine in the three-tank flotation machine 1 share a foam tank, and the foam generated by the three flotation machines all enter the foam tank. The feed slurry is connected to the first tank XCF flotation machine 101 of the three-tank flotation machine 1 through the roughing feed pipeline 2, and the feed slurry is transported to the first tank XCF flotation machine 101 of the three-tank flotation machine 1 through the roughing feed pipeline 2 and the slurry suction action of the XCF flotation machine. The underflow outlet of the cleaning operation component is connected to the first slot XCF flotation machine 101 of the three-slot flotation machine 1 through the cleaning underflow pipeline 3, and the underflow product of the cleaning operation component is transported to the first slot XCF flotation machine 101 of the three-slot flotation machine 1 through the cleaning underflow pipeline 3. The foam tank of the scavenging operation component is connected to the second slot XCF flotation machine 102 of the three-slot flotation machine 1 through the scavenging foam pipeline 4, and the foam product of the scavenging operation component is transported to the second slot XCF flotation machine 102 of the three-slot flotation machine 1 through the scavenging foam pipeline 4.

[0035] Application Implementation:

[0036] The flotation system of a non-ferrous lead, zinc and sulfur polymetallic mine in East China originally adopted a priority flotation process to select lead, zinc, sulfur and other polymetallics in turn. Later, due to the technical transformation of the process, a new green low-carbon zinc-sulfur flotation process was adopted to achieve early tailings, no sulfuric acid, low lime and efficient zinc and sulfur selection. In the industrial test production process, the scavenging tank overflows and the scavenging foam tank overflows. The foam product cannot be completely and timely sucked back to the roughing operation through the XCF slurry suction type aerated mechanical stirring flotation machine, and sometimes even affects the ore discharge operation of the selected bottom flow product, resulting in low quality of the concentrate product and high tailings product. To solve the above process and product problems. The engineering and technical personnel creatively proposed to break the conventional process of only configuring the XCF-8 slurry suction type aerated mechanical stirring flotation machine in the first slot of the conventional three-slot 8-cubic roughing, and continue to use the XCF-8 slurry suction type aerated mechanical stirring flotation machine in the second slot, and use the XCF-8 slurry suction type aerated mechanical stirring 22KW motor flotation machine in the second slot to suck the scavenged foam products into the roughing operation, which diverts the suction pressure of the XCF-8 slurry suction type aerated mechanical stirring 22KW motor flotation machine configured in the first slot, thereby simultaneously accelerating the speed of the scavenged foam products and the selected bottom flow products entering the roughing. The third slot is equipped with a KYF-8 aerated mechanical stirring 15KW motor flotation machine.

[0037] The industrial production test data of the present invention when applied and implemented are as follows:

[0038] Table 1. Industrial production test data of the present invention when applied and implemented:

[0039] name Yield / % Zinc grade / % Sulfur grade / % Zinc recovery rate / % Sulfur recovery rate / % Mixed roughing 118.83 4.65 15.92 103.34 115.94 Zinc Concentrate 10.34 51.06 30.33 98.72 19.69 Sulfur concentrate 26.33 0.15 47.12 0.71 77.93 Tailings 63.33 0.05 0.60 0.57 2.38

[0040] It can be clearly seen from Table 1 that the application and implementation of the present invention achieves better zinc and sulfur concentrate grades and better zinc concentrate recovery rates and sulfur concentrate recovery rates. Here, the zinc concentrate and sulfur concentrate recovery rates are both the recovery rates of this operation.

[0041] Table 2. Data of the industrial production test for the current month when the present invention is applied and implemented:

[0042] Zinc grade / % Sulfur grade / % Zinc recovery rate / % Sulfur recovery rate / % Ore 4.81 23.38 100 100 Zinc Concentrate 49.00 31.32 92.31 12.14 Sulfur concentrate 0.38 45.72 3.43 78.80 Tailings 0.19 2.83 3.43 5.62

[0043] Table 3. Annual data of industrial production test when the present invention is applied and implemented:

[0044] Zinc grade / % Sulfur grade / % Zinc recovery rate / % Sulfur recovery rate / % Ore 3.46 17.09 100 100 Zinc Concentrate 47.24 30.78 91.66 12.09 Sulfur concentrate 0.15 45.29 1.23 73.51 Tailings 0.12 2.91 2.07 10.60

[0045] It can be seen from the monthly data of the industrial production test when the present invention is implemented in Table 2 and the annual data of the industrial production test when the present invention is implemented in Table 3 that the monthly production indicators and annual production indicators are very stable after the implementation of the present invention, and the core technical indicators of concentrate grade and recovery rate have achieved very good results.

[0046] The protection scope of the present invention includes but is not limited to the above embodiments. The protection scope of the present invention shall be based on the claims. Any replacement, deformation, and improvement of the technology that can be easily thought of by technicians in this field shall fall within the protection scope of the present invention.

Claims

1. An unconventional pulp loop conveying method for non-ferrous metal flotation zinc-sulfur mixed flotation roughing operation, characterized in that: include: In the zinc-sulfur mixed flotation roughing operation of non-ferrous metal flotation, a three-tank flotation machine (1) is arranged to perform roughing operation, wherein the three-tank flotation machine (1) comprises a first-tank XCF flotation machine (101), a second-tank XCF flotation machine (102) and a third-tank KYF flotation machine (103) which are connected in sequence, the first-tank XCF flotation machine (101) is connected to a roughing feed pipeline (2) and a cleaning underflow pipeline (3) respectively, and the second-tank XCF flotation machine (102) is connected to a scavenging foam pipeline (4); The roughing feed pipe (2) conveys the feed ore pulp to the first XCF flotation machine (101) in the three-tank flotation machine (1); the first XCF flotation machine (101), the second XCF flotation machine (102) and the third KYF flotation machine (103) in the three-tank flotation machine (1) simultaneously perform a roughing operation; the foam product after the roughing operation flows into the cleaning operation; and the underflow product after the roughing operation flows into the scavenging operation; The foam product after the scavenging operation is transported to the second tank XCF flotation machine (102) in the three-tank flotation machine (1) through the scavenging foam pipeline (4); The underflow product after the cleaning operation is transported to the first tank XCF flotation machine (101) in the three-tank flotation machine (1) through the cleaning underflow pipeline (3).

2. The unconventional pulp loop transportation method for non-ferrous metal flotation zinc-sulfur mixed flotation roughing operation according to claim 1 is characterized in that: The underflow outlet of the three-tank flotation machine (1) is used to transport the underflow product after the roughing operation, and a roughing underflow discharge gate (1031) is arranged on the underflow outlet.

3. The unconventional pulp loop conveying method for non-ferrous metal flotation zinc-sulfur mixed flotation roughing operation according to claim 2 is characterized in that: The bottom flow outlet of the three-tank flotation machine (1) is arranged at the bottom of the tank body of the third tank KYF flotation machine (103).

4. The unconventional pulp loop conveying method for non-ferrous metal flotation zinc-sulfur mixed flotation roughing operation according to claim 1 is characterized in that: The cell volume of the first cell XCF flotation machine (101) is 2.8 cubic meters, 4 cubic meters or 8 cubic meters, the cell volume of the second cell XCF flotation machine (102) is 2.8 cubic meters, 4 cubic meters or 8 cubic meters, and the cell volume of the third cell KYF flotation machine (103) is 2.8 cubic meters, 4 cubic meters or 8 cubic meters.

5. The unconventional pulp loop transportation method for non-ferrous metal flotation zinc-sulfur mixed flotation roughing operation according to claim 1 is characterized in that: The first-tank XCF flotation machine (101) and the second-tank XCF flotation machine (102) are both XCF slurry suction type aerated mechanical agitation flotation machines, and the third-tank KYF flotation machine (103) is a KYF aerated mechanical agitation flotation machine.

6. The unconventional pulp loop transportation method for non-ferrous metal flotation zinc-sulfur mixed flotation roughing operation according to claim 1 is characterized in that: The diameter of the roughing feed pipe (2) is 100 mm, 150 mm or 200 mm.

7. The unconventional pulp loop transportation method for non-ferrous metal flotation zinc-sulfur mixed flotation roughing operation according to claim 1 is characterized in that: The diameter of the selected underflow pipe (3) is 100 mm, 150 mm or 200 mm.

8. The unconventional pulp loop transportation method for non-ferrous metal flotation zinc-sulfur mixed flotation roughing operation according to claim 1 is characterized in that: The diameter of the scavenging foam pipe (4) is 100 mm, 150 mm or 200 mm.

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