A variable sulfur separation device and process for dealing with complex and changeable raw ore

Abstract

The present invention discloses a variable sulfur separation device and process for dealing with complex and variable raw ores, including a sulfur separation feed pump. The sulfur separation feed pulp of the sulfur separation feed pump is connected to a roughing flotation machine through a stirring tank. The output ends of the roughing flotation machine are respectively communicated with a cleaning flotation machine and a first scavenging flotation machine. A sulfur concentrate output pipe is communicated with the output end of the cleaning flotation machine. A second scavenging flotation machine is communicated with one side of the first scavenging flotation machine, and a sulfur tailing output pipe is provided on the second scavenging flotation machine. It further includes an expanded zinc removal flotation machine, and a gate valve is arranged at the output end of the cleaning flotation machine and is communicated with the expanded zinc removal flotation machine. When the zinc content in the raw ore is relatively low, the zinc-sulfur separation beneficiation operation is not started, and the expanded zinc removal flotation machine saves capacity for the sulfur roughing operation. When the zinc content in the raw ore is relatively high, the zinc-sulfur separation beneficiation operation can be started by switching the gate valve, and the expanded zinc removal flotation machine plays a role in zinc separation from sulfur concentrate, thereby effectively improving the efficiency of sulfur separation from the raw ore.

Description

Technical Field

[0001] The present invention relates to the technical field of mineral processing, and particularly to a variable sulfur separation device and process for coping with complex and changeable raw ores. Background Art

[0002] With the world's resources being increasingly depleted, comprehensive utilization of resources is one of the hot scientific research topics for technological innovation to increase revenue and cut costs. The Dabaoshan Mine in Guangdong Province is an important copper production base for large-scale open-pit mining in China. In addition to being rich in copper, sulfur, and iron, the ore also contains a large amount of zinc. The Dabaoshan Mine produces more than 1 million tons of sulfur concentrate (35% standard sulfur) per year. However, due to the unstable zinc content in the raw ore, the zinc content in the sulfur concentrate often exceeds the standard, greatly reducing the quality of the sulfur concentrate. Conducting research on improving the added value of zinc metal in sulfur concentrate, effectively recycling zinc resources, and realizing the comprehensive utilization of mineral resources are of great significance for improving the economic benefits of the Dabaoshan Mine.

[0003] The existing conventional flotation process for sulfur separation is usually a one-roughing, one-cleaning, one-scavenging or two-scavenging process; or a zinc-sulfur separation beneficiation operation is set after the sulfur concentrate; therefore, when a zinc-sulfur separation process is set, it can only be used for sulfur separation and cannot achieve the function of zinc removal. When dealing with high-zinc raw ores, the zinc content in the sulfur concentrate usually exceeds the standard seriously; while when a zinc-sulfur separation process is set and dealing with low-zinc raw ores, the zinc-sulfur separation beneficiation operation set after the sulfur concentrate cannot achieve the separation effect, resulting in redundant or idle equipment and wasting resources. Summary of the Invention

[0004] The purpose of the present invention is to provide a variable sulfur separation device and process for coping with complex and changeable raw ores, which can select whether a zinc-sulfur separation beneficiation operation is needed according to the actual zinc content in the sulfur concentrate on site, making the process flow more reasonable and more efficient.

[0005] To achieve the above purpose, the present invention adopts the following solution: A variable sulfur separation device for coping with complex and changeable raw ores includes a sulfur separation feed pump. The sulfur separation feed pulp in the sulfur separation feed pump is transported to a roughing flotation machine through a stirring tank. The output end of the roughing flotation machine is respectively connected to a cleaning flotation machine and a first scavenging flotation machine. A sulfur concentrate output pipe is connected to the output end of the cleaning flotation machine. A second scavenging flotation machine is connected to one side of the first scavenging flotation machine. A sulfur tailing output pipe is provided on the second scavenging flotation machine. It further includes an expanded zinc removal flotation machine. A gate valve is provided at the output end of the cleaning flotation machine and is connected to the expanded zinc removal flotation machine. Gate valves are provided at the output ends of the first scavenging flotation machine and the second scavenging flotation machine and are connected to the expanded zinc removal flotation machine. A gate valve is provided at the output end of the expanded zinc removal flotation machine and is connected to both the cleaning flotation machine and the first scavenging flotation machine.

[0006] Further, the output end of the second scavenging flotation machine is communicated with the first scavenging flotation machine through a reflux pipeline.

[0007] Further, the output end of the cleaning flotation machine is communicated with the roughing flotation machine through a reflux pipeline.

[0008] Further, a gate valve is arranged at the output end of the first scavenging flotation machine and is communicated with the roughing flotation machine.

[0009] Further, the gate valve is one of an electric gate valve, a pneumatic gate valve or a manual gate valve.

[0010] A variable sulfur separation process for coping with complex and changeable raw ore includes the following steps:

[0011] A. Add sulfuric acid, zinc sulfate, butyl xanthate and a foaming agent to the sulfur ore pulp, stir, and conduct sulfur roughing in a roughing flotation machine to obtain sulfur rough scavenging concentrate and sulfur rough scavenging tailings;

[0012] B. Add butyl xanthate to the sulfur rough scavenging concentrate obtained in step A, stir, and conduct sulfur cleaning in a cleaning flotation machine to obtain sulfur concentrate and sulfur cleaning tailings or zinc-sulfur mixed concentrate and sulfur cleaning tailings. The sulfur cleaning tailings are returned to step A for sulfur roughing. If sulfur concentrate is obtained, step E1 is executed. If zinc-sulfur mixed concentrate is obtained, step E2 is executed;

[0013] C. Add butyl xanthate to the sulfur rough scavenging tailings obtained in step A, stir, and conduct the first sulfur scavenging in a first scavenging flotation machine to obtain sulfur first scavenging concentrate and sulfur first scavenging tailings;

[0014] D. Add butyl xanthate to the sulfur first scavenging tailings obtained in step C, stir, and conduct the second sulfur scavenging in a second scavenging flotation machine to obtain sulfur second scavenging concentrate and sulfur tailings;

[0015] E1. The sulfur first scavenging concentrate in step C and the sulfur second scavenging concentrate in step D flow to an expansion dezinccing flotation machine for sulfur expansion flotation to obtain sulfur expansion concentrate and sulfur expansion tailings. The obtained sulfur expansion concentrate flows to a cleaning flotation machine for sulfur cleaning to obtain sulfur concentrate, and the sulfur expansion tailings are returned to step C;

[0016] E2. The sulfur first scavenging concentrate obtained in step C is returned to the roughing flotation machine, and the sulfur second scavenging concentrate obtained in step D is returned to the first scavenging flotation machine. At the same time, add lime, YS inhibitor and copper sulfate to the zinc-sulfur mixed concentrate obtained in step B, stir, and conduct sulfur dezinccing flotation in an expansion dezinccing flotation machine to obtain zinc concentrate and sulfur concentrate.

[0017] Further, the specific process of step A is as follows:

[0018] a1: Add 1000 - 5000 g / t of sulfuric acid to the sulfur ore feeding pulp, and stir for 1 - 2 minutes;

[0019] a2: Add 100 - 500 g / t of zinc sulfate and stir for 2 - 5 minutes;

[0020] a3: Add 100 - 300 g / t of butyl xanthate and stir for 1 - 3 minutes;

[0021] a4: Add 0 - 50 g / t of frother and stir for 1 - 2 minutes.

[0022] Furthermore, in step B, the weight of butyl xanthate is 0 - 50 g / t and stir for 1 - 3 minutes.

[0023] Furthermore, in the first sulfur scavenging in step C, the weight of butyl xanthate is 50 - 150 g / t and stir for 1 - 3 minutes; in the second sulfur scavenging in step D, the weight of butyl xanthate is 10 - 100 g / t and stir for 1 - 3 minutes.

[0024] Furthermore, the specific process of step E2 is as follows:

[0025] e1: Add 200 - 2000 g / t of lime and stir for 3 - 5 minutes;

[0026] e2: Add 100 - 300 g / t of YS inhibitor and stir for 1 - 3 minutes;

[0027] e3: Add 200 - 500 g / t of copper sulfate and stir for 1 - 2 minutes.

[0028] In summary, the beneficial effects of the present invention compared with the prior art are: A new set of expanded zinc - removing flotation machines is added near the flotation machine. Under the condition of retaining the original pipeline, pipelines and gate valves are added, and thus the process can be changed. That is, when the zinc content in the sulfur concentrate is low, the zinc - sulfur separation beneficiation operation can be not started, saving capacity for the sulfur roughing operation; while when the zinc content in the sulfur concentrate is high, the zinc - sulfur separation beneficiation operation can be started by switching the gate valves, thereby effectively improving the efficiency of the original ore sulfur selection. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a schematic diagram when the second scavenging flotation machine of the present invention is connected to the expanded zinc - removing flotation machine.

[0030] Figure 2 It is a schematic diagram when the cleaning flotation machine of the present invention is connected to the expanded zinc - removing flotation machine.

[0031] Figure 3 It is a schematic diagram of the process flow when the zinc content in the sulfur concentrate of the present invention is low.

[0032] Figure 4 It is a schematic diagram of the process flow when the zinc content in the sulfur concentrate of the present invention is high. DETAILED DESCRIPTION OF THE INVENTION

[0033] The following specific implementation details provide various different embodiments or examples for implementing the present invention. Of course, these are only embodiments or examples and are not intended to be restrictive. Additionally, repeated reference numerals may be used in different embodiments, such as repeated numbers and / or letters. These repetitions are for the purpose of simply and clearly describing the present invention and do not represent a specific relationship between the different embodiments and / or structures being discussed.

[0034] Furthermore, spatially relative terms may be used, such as "below", "lower side", "from the inside out", "above", "upper side", and similar terms. These relative terms are for facilitating the description of the relationship between some elements or features in the drawings and other elements or features. These spatial relationship terms include different orientations of the device during use or operation, as well as the orientations described in the drawings. The device may be rotated 90 degrees or to other orientations, and the spatially relative adjectives used may be interpreted accordingly. Thus, it should not be construed as a limitation of the present invention. The terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of such features.

[0035] The following drawings and specific implementation details further describe the present invention:

[0036] A variable sulfur separation device for dealing with complex and variable raw ores includes a sulfur separation feed pump 1. The sulfur separation feed pulp of the sulfur separation feed pump 1 is connected to a roughing flotation machine 2 through a stirring tank. The output ends of the roughing flotation machine 2 are respectively communicated with a cleaning flotation machine 4 and a first scavenging flotation machine 5. A sulfur concentrate output pipe 6 is communicated with the output end of the cleaning flotation machine 4. A second scavenging flotation machine 7 is communicated with one side of the first scavenging flotation machine 5. A sulfur tailing output pipe 8 is provided on the second scavenging flotation machine 7. It further includes an expansion de-zincing flotation machine 9. A gate valve 3 is provided at the output end of the cleaning flotation machine 4 and is communicated with the expansion de-zincing flotation machine 9. Gate valves 3 are provided at the output ends of the first scavenging flotation machine 5 and the second scavenging flotation machine 7 and are communicated with the expansion de-zincing flotation machine 9. A gate valve 3 is provided at the output end of the expansion de-zincing flotation machine 9 and is communicated with both the cleaning flotation machine 4 and the first scavenging flotation machine 5. A new set of expansion de-zincing flotation machines 9 is added near the first scavenging flotation machine 5 and the second scavenging flotation machine 7. Under the condition of retaining the original pipeline, pipelines and gate valves 3 are added, and thus the process can be changed. That is, when the zinc content in the sulfur concentrate is relatively low, the zinc-sulfur separation beneficiation operation (i.e., Figure 1 as shown) can be not started, saving capacity for the sulfur roughing operation; while when the zinc content in the sulfur concentrate is relatively high, the zinc-sulfur separation beneficiation operation (i.e., Figure 2as shown), thus effectively improving the efficiency of sulfur separation from raw ore.

[0037] In the present invention, the output end of the second scavenging flotation machine 7 is connected to the first scavenging flotation machine 5 through a reflux pipeline. When the ore that fails to meet the requirements after being scavenged by the second scavenging flotation machine 7 flows back into the first scavenging flotation machine 5 through the reflux pipeline for re-scavenging.

[0038] In the present invention, the output end of the cleaning flotation machine 4 is connected to the roughing flotation machine 2 through a reflux pipeline. When the ore that fails to meet the requirements after being floated by the cleaning flotation machine 4 flows back into the roughing flotation machine 2 through the reflux pipeline for re-scavenging.

[0039] In the present invention, a gate valve 3 is provided at the output end of the first scavenging flotation machine 5 and is connected to the roughing flotation machine 2. When the ore that fails to meet the requirements after being scavenged by the first scavenging flotation machine 5 flows back into the roughing flotation machine 2 through the reflux pipeline for re-scavenging.

[0040] In the present invention, the gate valve 3 is one of an electric gate valve, a pneumatic gate valve or a manual gate valve.

[0041] The equipment of the present invention selects the opening of the zinc-expansion removal flotation machine 9 and the direction of the ore flow according to the zinc content in the sulfur concentrate. Among them, in combination Figure 1 、 Figure 3 as shown, this embodiment is the working state when the zinc content in the sulfur concentrate is relatively low. There is no need for the process flow in the zinc-sulfur separation beneficiation operation. Specifically, the process includes the following steps:

[0042] A. Add sulfuric acid, zinc sulfate, butyl xanthate, and foaming agent to the sulfur ore pulp, stir, and conduct sulfur roughing in the roughing flotation machine 2 to obtain sulfur rough scavenging concentrate and sulfur rough scavenging tailings;

[0043] B. Add butyl xanthate to the sulfur rough scavenging concentrate obtained in step A, stir, and conduct sulfur cleaning in the cleaning flotation machine 4 to obtain sulfur concentrate and sulfur cleaning tailings. The sulfur cleaning tailings are returned to step A for sulfur roughing;

[0044] C. Add butyl xanthate to the sulfur rough scavenging tailings obtained in step A, stir, and conduct the first sulfur scavenging in the first scavenging flotation machine 5 to obtain sulfur scavenging first concentrate and sulfur scavenging first tailings;

[0045] D. Add butyl xanthate to the sulfur scavenging first tailings obtained in step C, stir, and conduct the second sulfur scavenging in the second scavenging flotation machine 7 to obtain sulfur scavenging second concentrate and sulfur tailings;

[0046] E. The sulfur scavenging first concentrate in step C and the sulfur scavenging second concentrate in step D flow into the zinc-expansion removal flotation machine 9 for sulfur expansion flotation to obtain sulfur expansion concentrate and sulfur expansion tailings. The obtained sulfur expansion concentrate flows into the cleaning flotation machine 4 for sulfur cleaning to obtain sulfur concentrate, while the sulfur expansion tailings are returned to step C;

[0047] Specifically, the specific process of step A is as follows:

[0048] a1: Add 1000 - 5000 g / t of sulfuric acid to the selected sulfur feed pulp and stir for 1 - 2 minutes;

[0049] a2: Add 100 - 500 g / t of zinc sulfate and stir for 2 - 5 minutes;

[0050] a3: Add 100 - 300 g / t of butyl xanthate and stir for 1 - 3 minutes;

[0051] a4: Add 0 - 50 g / t of foaming agent and stir for 1 - 2 minutes.

[0052] Specifically, in step B, the weight of butyl xanthate is 0 - 50 g / t and stir for 1 - 3 minutes.

[0053] Specifically, in the first sulfur scavenging of step C, the weight of butyl xanthate is 50 - 150 g / t and stir for 1 - 3 minutes; in the second sulfur scavenging of step D, the weight of butyl xanthate is 10 - 100 g / t and stir for 1 - 3 minutes.

[0054] Specifically, the specific process of step E2 is as follows:

[0055] e1: Add 200 - 2000 g / t of lime and stir for 3 - 5 minutes;

[0056] e2: Add 100 - 300 g / t of YS inhibitor and stir for 1 - 3 minutes;

[0057] e3: Add 200 - 500 g / t of copper sulfate and stir for 1 - 2 minutes.

[0058] In the present invention, the specific process flow is as follows: The sulfur rougher flotation is carried out on the ground selected sulfur feed pulp in the rougher flotation machine 2 to obtain sulfur rougher scavenger concentrate and sulfur rougher scavenger tailings. Among them, the sulfur rougher scavenger concentrate is transported to the cleaner flotation machine 4 for sulfur cleaning to obtain sulfur concentrate and sulfur cleaner tailings. The sulfur cleaner tailings are returned to the rougher flotation machine 2 in step A for re - sulfur rougher flotation. The sulfur rougher scavenger tailings obtain sulfur first scavenger concentrate and sulfur first scavenger tailings in the first scavenger flotation machine 5. The sulfur first scavenger tailings are scavenged in the second scavenger flotation machine 7 to obtain sulfur second scavenger concentrate and sulfur tailings. Open the gate valves at the output ends of the first scavenger flotation machine 5 and the second scavenger flotation machine 7, and connect them to the expanded zinc - removal flotation machine 9. The sulfur first scavenger concentrate and the sulfur second scavenger concentrate flow into the expanded zinc - removal flotation machine 9 for sulfur expanded flotation to obtain sulfur expanded concentrate and sulfur expanded tailings. The sulfur expanded concentrate flows into the cleaner flotation machine 4 for sulfur cleaning to obtain sulfur concentrate, while the sulfur expanded tailings are returned to step C; after each of the above processes is completed, it is necessary to regularly detect its zinc content, and select to open the gate valve 3 according to the zinc content.

[0059] SeeFigure 2 , Figure 4 As shown in Figure 4 , when the zinc content in the sulfur concentrate is relatively high and zinc-sulfur separation beneficiation operations are required, the process flow is as follows. Specifically, the process includes the following steps:

[0060] A. Add sulfuric acid, zinc sulfate, butyl xanthate, and frother to the sulfur ore pulp, stir, and conduct rough sulfur flotation in the roughing flotation machine 2 to obtain rough sulfur scavenger concentrate and rough sulfur scavenger tailings;

[0061] B. Add butyl xanthate to the rough sulfur scavenger concentrate obtained in step A, stir, and conduct sulfur cleaning in the cleaning flotation machine 4 to obtain zinc-sulfur mixed concentrate and sulfur cleaning tailings. The sulfur cleaning tailings are returned to step A for rough sulfur flotation;

[0062] C. Add butyl xanthate to the rough sulfur scavenger tailings obtained in step A, stir, and conduct the first sulfur scavenging in the first scavenging flotation machine 5 to obtain first sulfur scavenger concentrate and first sulfur scavenger tailings;

[0063] D. Add butyl xanthate to the first sulfur scavenger tailings obtained in step C, stir, and conduct the second sulfur scavenging in the second scavenging flotation machine 7 to obtain second sulfur scavenger concentrate and sulfur tailings;

[0064] E. The first sulfur scavenger concentrate obtained in step C is returned to the roughing flotation machine 2, and the second sulfur scavenger concentrate obtained in step D is returned to the first scavenging flotation machine 5. At the same time, add lime, YS inhibitor, and copper sulfate to the zinc-sulfur mixed concentrate obtained in step B, stir, and conduct sulfur de-zincing flotation in the expanded de-zincing flotation machine 9 to obtain zinc concentrate and sulfur concentrate.

[0065] Specifically, the specific process of step A is as follows:

[0066] a1. Add 1000 - 5000 g / t of sulfuric acid to the sulfur feed pulp and stir for 1 - 2 minutes;

[0067] a2. Add 100 - 500 g / t of zinc sulfate and stir for 2 - 5 minutes;

[0068] a3. Add 100 - 300 g / t of butyl xanthate and stir for 1 - 3 minutes;

[0069] a4. Add 0 - 50 g / t of frother and stir for 1 - 2 minutes.

[0070] Specifically, the weight of butyl xanthate in step B is 0 - 50 g / t and it is stirred for 1 - 3 minutes.

[0071] Specifically, the weight of butyl xanthate in the first sulfur scavenging in step C is 50 - 150 g / t and it is stirred for 1 - 3 minutes; the weight of butyl xanthate in the second sulfur scavenging in step D is 10 - 100 g / t and it is stirred for 1 - 3 minutes.

[0072] Specifically, the specific process of step E2 is as follows:

[0073] e1: Add 200 - 2000 g / t of lime and stir for 3 - 5 minutes;

[0074] e2: Add 100 - 300 g / t of YS inhibitor and stir for 1 - 3 minutes;

[0075] e3: Add 200 - 500 g / t of copper sulfate and stir for 1 - 2 minutes.

[0076] In the present invention, the specific process flow is as follows: The sulfur - mixed flotation rougher is carried out on the sulfur - ore - feeding pulp after grinding in the rougher flotation machine 2 to obtain sulfur rough - scavenging concentrate and sulfur rough - scavenging tailings. Among them, the sulfur rough - scavenging concentrate is transported to the cleaner flotation machine 4 for sulfur cleaning to obtain zinc - sulfur mixed concentrate and sulfur cleaning tailings. The sulfur cleaning tailings are returned to the rougher flotation machine 2 in step A for re - sulfur roughing. The sulfur rough - scavenging tailings obtain sulfur first - scavenging concentrate and sulfur first - scavenging tailings in the first - scavenging flotation machine 5. The sulfur first - scavenging tailings are scavenged in the second - scavenging flotation machine 7 to obtain sulfur second - scavenging concentrate and sulfur tailings. Open the gate valve at the output end of the cleaner flotation machine 4 to communicate with the zinc - removing flotation machine 9 with capacity expansion. The zinc - sulfur mixed concentrate flows into the zinc - removing flotation machine 9 with capacity expansion for sulfur zinc - removing flotation to obtain zinc concentrate and sulfur concentrate; after each of the above processes is completed, it is necessary to regularly detect its zinc content, and select to open the gate valve 3 according to the zinc content.

[0077] Combined with the above display and description of the basic principles, main features and advantages of the present invention, those skilled in the art should understand that the present invention is not limited by the above - mentioned embodiments. What is described in the above - mentioned embodiments and the specification only illustrates the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of protection claimed by the present invention is defined by the appended claims and their equivalents.

Claims

1. A variable sulfur separation process for dealing with complex and variable raw ores. This process uses variable sulfur separation equipment, which includes a sulfur separation feed pump (1). The sulfur separation feed pulp in the sulfur separation feed pump (1) is transported to a roughing flotation machine (2) through a stirring tank. The output ends of the roughing flotation machine (2) are respectively connected to a cleaning flotation machine (4) and a first scavenging flotation machine (5). A sulfur concentrate output pipe (6) is connected to the output end of the cleaning flotation machine (4). A second scavenging flotation machine (7) is connected to one side of the first scavenging flotation machine (5). A sulfur tailing output pipe (8) is provided on the second scavenging flotation machine (7). Characterized in that: It further includes an expanded zinc removal flotation machine (9). A gate valve (3) is provided at the output end of the cleaning flotation machine (4) and is connected to the expanded zinc removal flotation machine (9). Gate valves (3) are provided at the output ends of the first scavenging flotation machine (5) and the second scavenging flotation machine (7) and are connected to the expanded zinc removal flotation machine (9). A gate valve (3) is provided at the output end of the expanded zinc removal flotation machine (9) and is connected to the cleaning flotation machine (4) and the first scavenging flotation machine (5); It includes the following steps: A. Add sulfuric acid, zinc sulfate, butyl xanthate, and a foaming agent to the sulfur separation feed pulp, stir, and conduct sulfur roughing in the roughing flotation machine (2) to obtain sulfur rough scavenging concentrate and sulfur rough scavenging tailings; B. Add butyl xanthate to the sulfur rough scavenging concentrate obtained in step A, stir, and conduct sulfur cleaning in the cleaning flotation machine (4) to obtain sulfur concentrate and sulfur cleaning tailings or zinc-sulfur mixed concentrate and sulfur cleaning tailings. The sulfur cleaning tailings are returned to step A for sulfur roughing. If sulfur concentrate is obtained, step E1 is executed. If zinc-sulfur mixed concentrate is obtained, step E2 is executed; C. Add butyl xanthate to the sulfur rough scavenging tailings obtained in step A, stir, and conduct the first sulfur scavenging in the first scavenging flotation machine (5) to obtain sulfur first scavenging concentrate and sulfur first scavenging tailings; D. Add butyl xanthate to the sulfur first scavenging tailings obtained in step C, stir, and conduct the second sulfur scavenging in the second scavenging flotation machine (7) to obtain sulfur second scavenging concentrate and sulfur tailings; E1. The sulfur first scavenging concentrate in step C and the sulfur second scavenging concentrate in step D flow into the expanded zinc removal flotation machine (9) for sulfur expanded flotation to obtain sulfur expanded concentrate and sulfur expanded tailings. The obtained sulfur expanded concentrate flows into the cleaning flotation machine (4) for sulfur cleaning to obtain sulfur concentrate, and the sulfur expanded tailings are returned to step C; E2. The sulfur first scavenging concentrate obtained in step C is returned to the roughing flotation machine (2), and the sulfur second scavenging concentrate obtained in step D is returned to the first scavenging flotation machine (5). At the same time, add lime, YS inhibitor, and copper sulfate to the zinc-sulfur mixed concentrate obtained in step B, stir, and conduct sulfur zinc removal flotation in the expanded zinc removal flotation machine (9) to obtain zinc concentrate and sulfur concentrate.

2. The variable sulfur separation process for dealing with complex and variable raw ores according to claim 1, Characterized in that: The output end of the second scavenging flotation machine (7) is connected to the first scavenging flotation machine (5) through a reflux pipeline.

3. The variable sulfur separation process for dealing with complex and variable raw ores according to claim 1, Characterized in that: The output end of the selected flotation machine (4) is communicated with the roughing flotation machine (2) through a reflux pipeline.

4. The variable sulfur separation process for dealing with complex and changeable raw ore according to claim 1, characterized in that: A gate valve (3) is arranged at the output end of the first scavenging flotation machine (5) and is communicated with the roughing flotation machine (2).

5. The variable sulfur separation process for dealing with complex and changeable raw ore according to any one of claims 1-4, characterized in that: The gate valve (3) is one of an electric gate valve, a pneumatic gate valve or a manual gate valve.

6. The variable sulfur separation process for dealing with complex and changeable raw ore according to claim 1, characterized in that, The specific process of step A is as follows: a1: Add 1000-5000 g / t of sulfuric acid to the sulfur separation feed pulp and stir for 1-2 minutes; a2: Add 100-500 g / t of zinc sulfate and stir for 2-5 minutes; a3: Add 100-300 g / t of butyl xanthate and stir for 1-3 minutes; a4: Add 50 g / t of foaming agent and stir for 1-2 minutes.

7. The variable sulfur separation process for dealing with complex and changeable raw ore according to claim 1, characterized in that: In step B, the weight of butyl xanthate is 50 g / t and it is stirred for 1-3 minutes.

8. The variable sulfur separation process for dealing with complex and changeable raw ore according to claim 1, characterized in that: In the first sulfur scavenging of step C, the weight of butyl xanthate is 50-150 g / t and it is stirred for 1-3 minutes; in the second sulfur scavenging of step D, the weight of butyl xanthate is 10-100 g / t and it is stirred for 1-3 minutes.

9. The variable sulfur separation process for dealing with complex and changeable raw ore according to claim 1, characterized in that, The specific process of step E2 is as follows: e1: Add 200-2000 g / t of lime and stir for 3-5 minutes; e2: Add 100-300 g / t of YS inhibitor and stir for 1-3 minutes; e3: Add 200-500 g / t of copper sulfate and stir for 1-2 minutes.

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