Improved gold ore flotation process system

Abstract

The utility model discloses an improved gold ore flotation process system which is characterized in that a foam outlet of a main flotation scavenging flotation machine is connected with a feeding end of a first pump pool through a pipeline, and a discharging end of the first pump pool is connected with a feeding port of a main flotation roughing flotation machine through a pipeline with a slurry pump, so that foam of scavenging secondary flotation is returned to roughing flotation. The slurry is classified by a slurry cyclone, and most of coarse particle materials which are about 200 meshes and easy to float are separated into a main process for flotation, so that the influence of fine silt and filling materials on the main process is further eliminated. And after grading, fine fraction is subjected to mud flotation operation. The gold flotation recovery rate is further increased by improving the gold ore slime concentrate treatment mode and the secondary scavenging foam treatment mode in the main flotation process.

Description

Technical Field

[0001] The utility model relates to the technical field of ore dressing, in particular to an improved gold flotation process system. Background Art

[0002] In the conventional flotation process flow, the foam products of the secondary scavenging operation need to be returned to the primary scavenging operation for re-concentration. Its main defect is that the recovery effect of the particles of the non-floating intergrowth is poor, resulting in a low flotation recovery rate and a high tailing grade.

[0003] Gold ore slime mainly comes from primary ore slime and secondary ore slime. The quality of the ore slime is very small, the specific surface area is large, and it is easy to adhere to the surface of coarse particles, reducing the floatability and selectivity of the coarse particles. On the other hand, the ore slime will adsorb a large amount of flotation reagents in the pulp, reducing the reagent concentration in the pulp, disrupting the normal flotation process, reducing the flotation index, and being easy to react with various reagents, making it difficult to separate. It has strong hydrophilicity, making the foam overly stable, causing difficulties in the cleaning process, reducing the concentrate quality, and reducing the fluidity and concentration efficiency of the foam products. Therefore, the presence of ore slime has a great impact on the normal flotation operation index. The experimental research results show that the gold recovery rate decreases with the increase of the ore slime ratio.

[0004] To solve the above problems, the current common practice is to strengthen the ore washing operation after coarse crushing to reduce the influence of ore slime on the main process. At the same time, the ore slime after washing is treated separately, and the ore slime cleaning products are directly produced to obtain gold concentrate. Although treating the ore slime separately avoids the influence of fine slime on the main process, the process flow of treating the ore slime separately is relatively complex, the production management is difficult, and the stability of various indexes is also poor, resulting in a low concentrate grade (about 25 - 35 g / t) and a very low recovery rate (about 70%) for the slime flotation. Summary of the Utility Model

[0005] The technical problem to be solved by the utility model is to provide an improved gold flotation process system, and by improving the treatment method of gold ore slime concentrate and the treatment method of the secondary scavenging foam in the main flotation process, further improve the gold flotation recovery rate.

[0006] The technical solution of the utility model is as follows:

[0007] An improved gold ore flotation process system, comprising a first agitation tank, a main flotation preferential flotation machine, a main flotation cleaning flotation machine, a main flotation roughing flotation machine, a first pump sump, a second pump sump, a third pump sump and a fifth pump sump. The overflow port of the first agitation tank is connected to the feed port of the main flotation preferential flotation machine through a pipeline. The foam outlet of the main flotation preferential flotation machine is connected to the feed port of the fifth pump sump through a pipeline. The tailings outlet of the main flotation preferential flotation machine is connected to the feed port of the main flotation roughing flotation machine. The main flotation roughing flotation machine is sequentially connected with a main flotation scavenger 1 flotation machine and a main flotation scavenger 2 flotation machine through pipelines. Among them, the foam outlet of the main flotation scavenger 1 flotation machine is connected to the feed end of the second pump sump through a pipeline. The discharge end of the second pump sump is connected to the feed port of the main flotation preferential flotation machine through a pipeline with a second slurry pump. The foam outlet of the main flotation roughing flotation machine is connected to the feed end of the third pump sump through a pipeline. The discharge end of the third pump sump is connected to the feed port of the main flotation cleaning flotation machine through a pipeline with a third slurry pump. The foam outlet of the main flotation cleaning flotation machine is connected to the feed port of the fifth pump sump through a pipeline. The tailings outlet of the main flotation cleaning flotation machine is connected to the feed port of the main flotation preferential flotation machine. The foam outlet of the main flotation scavenger 2 flotation machine is connected to the feed end of the first pump sump through a pipeline. The discharge end of the first pump sump is connected to the feed port of the main flotation roughing flotation machine through a pipeline with a first slurry pump.

[0008] Preferably, the system further comprises a third agitation tank, a thickener and a filter press. The discharge port of the fifth pump sump is connected to the feed end of the thickener through a pipeline with a fifth slurry pump. The discharge end of the thickener is connected to the feed port of the third agitation tank through a pipeline. The discharge port of the third agitation tank is connected to the feed end of the filter press through a pipeline with a sixth slurry pump.

[0009] Preferably, the system further comprises a second agitation tank, a fourth pump sump, a hydrocyclone, a slime flotation roughing flotation machine and a slime flotation cleaning flotation machine. The feed port of the hydrocyclone is used to introduce gold ore slime. The underflow port of the hydrocyclone is connected to the feed port of the first agitation tank through a pipeline. The overflow port of the hydrocyclone is connected to the feed port of the second agitation tank. The discharge port of the second agitation tank is connected to the feed port of the slime flotation roughing flotation machine. The foam outlet of the slime flotation roughing flotation machine is connected to the feed port of the fourth pump sump through a pipeline. The discharge port of the fourth pump sump is connected to the feed port of the slime flotation cleaning flotation machine through a pipeline with a fourth slurry pump. The foam outlet of the slime flotation cleaning flotation machine is connected to the feed port of the main flotation cleaning flotation machine. The tailings outlet of the slime flotation cleaning flotation machine is connected to the feed port of the second agitation tank.

[0010] Compared with the prior art, the utility model has the following beneficial effects:

[0011] First, in the flotation process system of the present utility model, the foam from the second scavenging is returned from the existing technology to the first scavenging and changed to be returned to the roughing. On the one hand, it increases the separation time of middlings; on the other hand, since there are many easily separated minerals and rich foam in the roughing process, it has a certain carrying effect on refractory gold; thirdly, returning the foam from the second scavenging to the roughing process is more conducive to improving the recovery effect of the non-floating intergrowth particles, so as to achieve the purpose of reducing the tailing grade and increasing the flotation recovery rate. Therefore, this system can significantly improve the recovery rate of gold. Experiments show that by taking this measure, the gold tailing grade is reduced by 0.0018 g / t compared with before the transformation, and the gold flotation recovery rate is increased by 0.14%. Second, the present utility model further improves the grade of the slime gold concentrate by introducing the gold ore slime concentrate into the main cleaning operation for further enrichment, fundamentally solving the problem of the relatively low grade of the slime gold concentrate, and improving the grade and recovery rate of the gold concentrate. By taking this measure, the gold flotation recovery rate is increased by 0.2% - 0.3% compared with before the transformation, further improving the utilization rate of gold ore resources and increasing economic benefits. Brief Description of the Drawings

[0012] Figure 1 It is a schematic diagram of the structure and technological process of an embodiment of the present utility model.

[0013] Description of the Reference Numerals:

[0014] In the figure, 1-1, the first agitation tank; 1-2, the second agitation tank; 1-3, the third agitation tank; 2-1, the preferred flotation machine for the main flotation; 2-2, the roughing flotation machine for the main flotation; 2-3, the first scavenging flotation machine for the main flotation; 2-4, the second scavenging flotation machine for the main flotation; 2-5, the cleaning flotation machine for the main flotation; 2-6, the roughing flotation machine for the slime flotation; 2-7, the cleaning flotation machine for the slime flotation; 3-1, the first slurry pump; 3-2, the second slurry pump; 3-3, the third slurry pump; 3-4, the fourth slurry pump; 3-5, the fifth slurry pump; 3-6, the sixth slurry pump; 4-1, the first pump sump; 4-2, the second pump sump; 4-3, the third pump sump; 4-4, the fourth pump sump; 4-5, the fifth pump sump; 5, the hydrocyclone; 6, the thickener; 7, the filter press; G1, the first pipe; G2, the second pipe; G3, the third pipe; G4, the fourth pipe; G5, the fifth pipe; G6, the sixth pipe; G7, the seventh pipe; G8, the eighth pipe; G9, the ninth pipe; G10, the tenth pipe. Detailed Embodiment

[0015] In order to make the purpose, technical solution and advantages of the present utility model clearer, the present utility model will be described in detail below with reference to the drawings and specific embodiments.

[0016] As Figure 1, an embodiment of the flotation process system of the present utility model includes a first agitation tank 1-1, a second agitation tank 1-2, a third agitation tank 1-3, a main flotation preferred flotation machine 2-1, a main flotation cleaning flotation machine 2-5, a main flotation roughing flotation machine 2-2, a first pump sump 4-1, a second pump sump 4-2, a third pump sump 4-3, a fifth pump sump 4-5, a thickener 6 and a filter press 7.

[0017] The overflow port of the first agitation tank 1-1 is connected to the feed port of the main flotation preferred flotation machine 2-1 through a pipeline. The foam outlet of the main flotation preferred flotation machine 2-1 is connected to the feed port of the fifth pump sump 4-5 through a pipeline, and the tailing outlet of the main flotation preferred flotation machine 2-1 is connected to the feed port of the main flotation roughing flotation machine 2-2. The main flotation roughing flotation machine 2-2 is sequentially connected with a main flotation scavenging one flotation machine 2-3 and a main flotation scavenging two flotation machine 2-4 through pipelines. Among them, the foam outlet of the main flotation scavenging one flotation machine 2-3 is connected to the feed end of the second pump sump 4-2 through a pipeline, and the discharge end of the second pump sump 4-2 is connected to the feed port of the main flotation preferred flotation machine 2-1 through a pipeline with a second slurry pump 3-2. Among them, the foam outlet of the main flotation scavenging two flotation machine 2-4 is connected to the feed end of the first pump sump 4-1 through a pipeline, and the discharge end of the first pump sump 4-1 is connected to the feed port of the main flotation roughing flotation machine 2-2 through a third pipe G3 with a first slurry pump 3-1, so that the foam of the second scavenging is returned to the roughing. The tailing outlet of the main flotation scavenging two flotation machine 2-4 is connected with a fourth pipe G4 for discharging the second scavenging tailings from the system.

[0018] The foam outlet of the main flotation roughing flotation machine 2-2 is connected to the feed end of the third pump sump 4-3 through a pipeline, and the discharge end of the third pump sump 4-3 is connected to the feed port of the main flotation cleaning flotation machine 2-5 through a pipeline with a third slurry pump 3-3. The foam outlet of the main flotation cleaning flotation machine 2-5 is connected to the feed port of the fifth pump sump 4-5 through a pipeline. The tailing outlet of the main flotation cleaning flotation machine 2-5 is connected to the feed port of the main flotation preferred flotation machine 2-1.

[0019] The discharge port of the fifth pump sump 4-5 is connected to the feed end of the thickener 6 through a pipeline with a fifth slurry pump 3-5. The discharge end of the thickener 6 is connected to the feed port of the third agitation tank 1-3 through a tenth pipe G10. The overflow end of the thickener 6 is connected with a ninth pipe G9 for discharging overflow water. The discharge outlet of the third agitation tank 1-3 is connected to the feed end of the filter press 7 through a pipeline with a sixth slurry pump 3-6. The discharge end of the filter press 7 is used for discharging the concentrate to the concentrate storage.

[0020] Further, this embodiment also includes a fourth pump sump 4-4, a hydrocyclone 5, a sludge flotation roughing flotation machine 2-6 and a sludge flotation cleaning flotation machine 2-7.

[0021] The feed inlet of the hydrocyclone 5 is connected to a second pipe G2 for introducing gold ore slime into the hydrocyclone 5. The sand discharge port of the hydrocyclone 5 is connected to the feed inlet of the first agitation tank 1-1 through a pipeline. The overflow port of the hydrocyclone 5 is connected to the feed inlet of the second agitation tank 1-2 through an eighth pipe G8, and the discharge port of the second agitation tank 1-2 is connected to the feed inlet of the roughing flotation machine 2-6 for slime through a sixth pipe G6. The foam outlet of the roughing flotation machine 2-6 for slime is connected to the feed inlet of the fourth pump sump 4-4 through a pipeline, and the discharge port of the fourth pump sump 4-4 is connected to the feed inlet of the cleaning flotation machine 2-7 for slime through a pipeline with a fourth slurry pump 3-4. The tailing outlet of the roughing flotation machine 2-6 for slime is connected to a fifth pipe G5 for discharging the roughing tailings of the slime flotation from the system. The foam outlet of the cleaning flotation machine 2-7 for slime is connected to the feed inlet of the main cleaning flotation machine 2-5 through a seventh pipe G7, and the cleaned product of the slime enters the main process cleaning operation. The tailing outlet of the cleaning flotation machine 2-7 for slime is connected to the feed inlet of the second agitation tank 1-2.

[0022] When the system operates, the ore after ore washing, crushing, grinding and classification enters the first agitation tank 1-1 through the first pipe G1 for pulp mixing and then enters the main flotation process. The gold ore slime is classified by the hydrocyclone, and most of the coarse particle materials about 200 mesh that are easy to float are separated into the main process flotation to further eliminate the influence of fine slime and filling materials on the main process. After classification, the fine particle size enters the slime flotation operation.

Claims

1. An improved gold ore flotation process system, comprising a first agitation tank (1-1), a main flotation preferential flotation machine (2-1), a main flotation cleaning flotation machine (2-5), a main flotation roughing flotation machine (2-2), a first pump sump (4-1), a second pump sump (4-2), a third pump sump (4-3) and a fifth pump sump (4-5). The overflow port of the first agitation tank (1-1) is connected to the feed port of the main flotation preferential flotation machine (2-1) through a pipeline. The foam outlet of the main flotation preferential flotation machine (2-1) is connected to the feed port of the fifth pump sump (4-5) through a pipeline. The tailing outlet of the main flotation preferential flotation machine (2-1) is connected to the feed port of the main flotation roughing flotation machine (2-2). The main flotation roughing flotation machine (2-2) is sequentially connected with a main flotation scavenger-1 flotation machine (2-3) and a main flotation scavenger-2 flotation machine (2-4) through pipelines. Among them, the foam outlet of the main flotation scavenger-1 flotation machine (2-3) is connected to the feed end of the second pump sump (4-2) through a pipeline. The discharge end of the second pump sump (4-2) is connected to the feed port of the main flotation preferential flotation machine (2-1) through a pipeline with a second slurry pump (3-2). The foam outlet of the main flotation roughing flotation machine (2-2) is connected to the feed end of the third pump sump (4-3) through a pipeline. The discharge end of the third pump sump (4-3) is connected to the feed port of the main flotation cleaning flotation machine (2-5) through a pipeline with a third slurry pump (3-3). The foam outlet of the main flotation cleaning flotation machine (2-5) is connected to the feed port of the fifth pump sump (4-5) through a pipeline. The tailing outlet of the main flotation cleaning flotation machine (2-5) is connected to the feed port of the main flotation preferential flotation machine (2-1). It is characterized in that: The foam outlet of the main flotation scavenger flotation machine (2-4) is connected to the feed end of the first pump sump (4-1) through a pipeline; the discharge end of the first pump sump (4-1) is connected to the feed inlet of the main flotation rougher flotation machine (2-2) through a pipeline with a first slurry pump (3-1).

2. The improved gold ore flotation process system according to claim 1, characterized in that: The system further includes a third agitation tank (1-3), a thickener (6) and a filter press (7); the discharge outlet of the fifth pump sump (4-5) is connected to the feed end of the thickener (6) through a pipeline with a fifth slurry pump (3-5), and the discharge end of the thickener (6) is connected to the feed inlet of the third agitation tank (1-3) through a pipeline; the discharge outlet of the third agitation tank (1-3) is connected to the feed end of the filter press (7) through a pipeline with a sixth slurry pump (3-6).

3. The improved gold ore flotation process system according to claim 1 or 2, characterized in that: The system further includes a second agitation tank (1-2), a fourth pump sump (4-4), a hydrocyclone (5), a slime flotation rougher flotation machine (2-6) and a slime flotation cleaner flotation machine (2-7); the feed inlet of the hydrocyclone (5) is used to introduce gold ore slime; the underflow outlet of the hydrocyclone (5) is connected to the feed inlet of the first agitation tank (1-1) through a pipeline; the overflow outlet of the hydrocyclone (5) is connected to the feed inlet of the second agitation tank (1-2), and the discharge outlet of the second agitation tank (1-2) is connected to the feed inlet of the slime flotation rougher flotation machine (2-6); the foam outlet of the slime flotation rougher flotation machine (2-6) is connected to the feed inlet of the fourth pump sump (4-4) through a pipeline, and the discharge outlet of the fourth pump sump (4-4) is connected to the feed inlet of the slime flotation cleaner flotation machine (2-7) through a pipeline with a fourth slurry pump (3-4); the foam outlet of the slime flotation cleaner flotation machine (2-7) is connected to the feed inlet of the main flotation cleaner flotation machine (2-5); the tailings outlet of the slime flotation cleaner flotation machine (2-7) is connected to the feed inlet of the second agitation tank (1-2).

Images