Beneficiation system for reducing zinc metal content in lead concentrate

Abstract

The utility model discloses a beneficiation system for reducing the content of zinc metal in lead concentrate. The beneficiation system comprises a first ball mill, a grader, a buffer box, a flotation stirring barrel, a first roughing flotation machine, a second roughing flotation machine, a fine selection system, a scavenging system, a sodium sulfide storage tank, a zinc sulfate storage tank and a sodium sulfite storage tank. The device has the advantages that the device is simple in connecting structure and easy to realize, fully realizes the mixing of the medicament and the mineral aggregate, has a better zinc inhibition effect compared with a manner of adding the medicament into the mineral aggregate in a centralized one-time manner and adding the medicament into the mineral aggregate in a segmented manner, can fully realize the separation of lead and zinc in subsequent flotation, and improves the product quality of lead concentrate; and the lead and zinc are prevented from being conveyed into the first roughing flotation machine to be subjected to bulk flotation with raw ore pulp, the lead and zinc separation effect is improved, and then the quality of subsequent lead concentrate products is improved.

Description

Technical field:

[0001] The utility model relates to a mineral processing system, in particular to a mineral processing system for reducing the zinc metal content in lead concentrate. Background technology:

[0002] Lead and zinc phase minerals have the characteristics of complex ore types, multiple associated components, and complex embedding relationships. It is difficult to separate lead and zinc. The main reason is that the surface of sphalerite will adsorb the Pb produced by the dissolution of galena. 2+ , resulting in similar surface properties of the two minerals; surface oxidation of galena reduces its floatability, while slight oxidation of sphalerite increases its floatability, resulting in similar floatability of the two minerals; lead and zinc ores are seriously inter-included and closely embedded, which increases the difficulty of lead and zinc separation. Utility model content:

[0003] The utility model aims to provide a mineral processing system for reducing the zinc metal content in lead concentrate, which has a simple connection structure, fully realizes lead-zinc separation, and improves the quality of lead concentrate products.

[0004] The utility model is implemented by the following technical scheme: The purpose of this patent is to provide a mineral processing system for reducing the zinc metal content in lead concentrate, which includes a first ball mill, a classifier, a cache box, a flotation stirring barrel, a first roughing flotation machine, a second roughing flotation machine, a concentration system, a scavenging system, a sodium sulfide storage tank, a zinc sulfate storage tank and a sodium sulfite storage tank; the discharge port of the first ball mill is connected to the feed port of the classifier, the fine material outlet of the classifier is connected to the feed port of the cache box, the discharge port of the cache box is connected to the feed port of the flotation stirring barrel, the discharge port of the flotation stirring barrel is connected to the feed port of the first roughing flotation machine, the concentrate outlet of the first roughing flotation machine is connected to the feed port of the primary concentration flotation machine of the concentration system, and the first The tailings outlet of the roughing flotation machine is connected to the feed inlet of the primary scavenging flotation machine of the scavenging system, and the tailings outlet of the primary concentrating flotation machine and the concentrate outlet of the primary scavenging flotation machine are both connected to the feed inlet of the second roughing flotation machine; the concentrate outlet of the second roughing flotation machine is connected to the feed inlet of the primary concentrating flotation machine, and the tailings outlet of the second roughing flotation machine is connected to the feed inlet of the primary scavenging flotation machine; the drug outlets of the sodium sulfide drug storage tank and the zinc sulfate drug storage tank are both connected to the drug inlet of the first ball mill, the drug outlets of the zinc sulfate drug storage tank and the sodium sulfite drug storage tank are both connected to the drug inlet of the cache box, and the drug outlets of the zinc sulfate drug storage tank and the sodium sulfite drug storage tank are both connected to the drug inlet of the flotation stirring barrel.

[0005] Furthermore, it also includes a cyclone and a second ball mill; the discharge port of the cache box is connected to the feed port of the cyclone, and the fine material outlet of the cyclone is connected to the feed port of the flotation stirring barrel; the coarse material outlet of the cyclone is connected to the feed port of the second ball mill, and the discharge port of the second ball mill is connected to the feed port of the cache box.

[0006] Furthermore, the beneficiation system includes the primary beneficiation flotation machine, the secondary beneficiation flotation machine, the tertiary beneficiation flotation machine and the quaternary beneficiation flotation machine; the concentrate outlet of the primary beneficiation flotation machine is connected to the feed inlet of the secondary beneficiation flotation machine, the concentrate outlet of the secondary beneficiation flotation machine is connected to the feed inlet of the tertiary beneficiation flotation machine, the concentrate outlet of the tertiary beneficiation flotation machine is connected to the feed inlet of the quaternary beneficiation flotation machine; the tailings outlet of the quaternary beneficiation flotation machine is connected to the feed inlet of the tertiary beneficiation flotation machine, the tailings outlet of the tertiary beneficiation flotation machine is connected to the feed inlet of the secondary beneficiation flotation machine, and the tailings outlet of the secondary beneficiation flotation machine is connected to the feed inlet of the primary beneficiation flotation machine.

[0007] Furthermore, the scavenging system includes the primary scavenging flotation machine, the secondary scavenging flotation machine, the tertiary scavenging flotation machine and the quaternary scavenging flotation machine; the tailings outlet of the primary scavenging flotation machine is connected to the feed port of the secondary scavenging flotation machine, the tailings outlet of the secondary scavenging flotation machine is connected to the feed port of the tertiary scavenging flotation machine, and the tailings outlet of the tertiary scavenging flotation machine is connected to the feed port of the 4th scavenging flotation machine; the concentrate outlet of the 4th scavenging flotation machine is connected to the feed port of the 3rd scavenging flotation machine, the concentrate outlet of the 3rd scavenging flotation machine is connected to the feed port of the secondary scavenging flotation machine, and the concentrate outlet of the secondary scavenging flotation machine is connected to the feed port of the primary scavenging flotation machine.

[0008] The utility model has the following advantages: 1. The utility model has a simple connection structure and is easy to implement. Sodium sulfide and zinc sulfate are added to the first ball mill and mixed with the ore, zinc sulfate and sodium sulfite are added to the buffer box and mixed with the ore, and then zinc sulfate and sodium sulfite are added to the flotation stirring barrel and mixed with the ore, so that the mixing of the reagent and the ore is fully realized. Compared with adding the reagent to the ore in a centralized manner at one time, the effect of adding the reagent to the ore in stages to inhibit zinc is better, and the subsequent flotation can fully realize the separation of lead and zinc, thereby improving the product quality of the lead concentrate; 2. The tailings floated by the first-level concentration flotation machine and the concentrate scavenged by the first-level scavenging flotation machine are both sent to the second roughing flotation machine, so as to avoid sending them to the first roughing flotation machine for mixed flotation with the original ore slurry, thereby improving the separation effect of lead and zinc, and thus improving the quality of the subsequent lead concentrate products. Description of the drawings:

[0009] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0010] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0011] The first ball mill 1, the classifier 2, the buffer box 3, the flotation mixing barrel 4, the first roughing flotation machine 5, the second roughing flotation machine 6, the cleaning system 7, the primary cleaning flotation machine 71, the secondary cleaning flotation machine 72, the tertiary cleaning flotation machine 73, the quaternary cleaning flotation machine 74, the scavenging system 8, the primary scavenging flotation machine 81, the secondary scavenging flotation machine 82, the tertiary scavenging flotation machine 83, the quaternary scavenging flotation machine 84, the sodium sulfide storage tank 9, the zinc sulfate storage tank 10, the sodium sulfite storage tank 11, the cyclone 12, and the second ball mill 13. Specific implementation method:

[0012] Example 1: Figure 1As shown, a beneficiation system for reducing the zinc metal content in lead concentrate includes a first ball mill 1, a classifier 2, a cache box 3, a flotation stirring barrel 4, a first roughing flotation machine 5, a second roughing flotation machine 6, a concentration system 7, a scavenging system 8, a sodium sulfide storage tank 9, a zinc sulfate storage tank 10, a sodium sulfite storage tank 11, a cyclone 12 and a second ball mill 13; the discharge port of the first ball mill 1 is connected to the feed port of the classifier 2, the fine material outlet of the classifier 2 is connected to the feed port of the cache box 3, the discharge port of the cache box 3 is connected to the feed port of the cyclone 12, and the fine material outlet of the cyclone 12 is connected to the feed port of the flotation stirring barrel 4; the coarse material outlet of the cyclone 12 is connected to the feed port of the second ball mill 13, and the discharge port of the second ball mill 13 is connected to the feed port of the cache box 3; the discharge port of the flotation stirring barrel 4 is connected to the feed port of the first roughing flotation machine 5, and the discharge port of the second ball mill 13 is connected to the feed port of the cache box 3. The concentrate outlet of the first roughing flotation machine 5 is connected to the feed inlet of the primary flotation machine 71 of the concentration system 7, the tailings outlet of the first roughing flotation machine 5 is connected to the feed inlet of the primary scavenging flotation machine 81 of the scavenging system 8, the tailings outlet of the primary flotation machine 71 and the concentrate outlet of the primary scavenging flotation machine 81 are both connected to the feed inlet of the second roughing flotation machine 6; the concentrate outlet of the second roughing flotation machine 6 is connected to the feed inlet of the primary flotation machine 71. The tailings outlet of the second roughing flotation machine 6 is connected with the feed inlet of the primary scavenging flotation machine 81; the outlets of the sodium sulfide storage tank 9 and the zinc sulfate storage tank 10 are both connected with the feed inlet of the first ball mill 1, the outlets of the zinc sulfate storage tank 10 and the sodium sulfite storage tank 11 are both connected with the feed inlet of the cache box 3, and the outlets of the zinc sulfate storage tank 10 and the sodium sulfite storage tank 11 are both connected with the feed inlet of the flotation stirring barrel 4.

[0013] The beneficiation system 7 includes a primary beneficiation flotation machine 71, a secondary beneficiation flotation machine 72, a tertiary beneficiation flotation machine 73 and a quaternary beneficiation flotation machine 74; the concentrate outlet of the primary beneficiation flotation machine 71 is connected to the feed port of the secondary beneficiation flotation machine 72, the concentrate outlet of the secondary beneficiation flotation machine 72 is connected to the feed port of the tertiary beneficiation flotation machine 73, the concentrate outlet of the tertiary beneficiation flotation machine 73 is connected to the feed port of the quaternary beneficiation flotation machine 74; the tailings outlet of the quaternary beneficiation flotation machine 74 is connected to the feed port of the tertiary beneficiation flotation machine 73, the tailings outlet of the tertiary beneficiation flotation machine 73 is connected to the feed port of the secondary beneficiation flotation machine 72, and the tailings outlet of the secondary beneficiation flotation machine 72 is connected to the feed port of the primary beneficiation flotation machine 71.

[0014] The scavenging system 8 includes a primary scavenging flotation machine 81, a secondary scavenging flotation machine 82, a tertiary scavenging flotation machine 83 and a quaternary scavenging flotation machine 84; the tailings outlet of the primary scavenging flotation machine 81 is connected to the feed port of the secondary scavenging flotation machine 82, the tailings outlet of the secondary scavenging flotation machine 82 is connected to the feed port of the tertiary scavenging flotation machine 83, and the tailings outlet of the tertiary scavenging flotation machine 83 is connected to the feed port of the quaternary scavenging flotation machine 84; the concentrate outlet of the quaternary scavenging flotation machine 84 is connected to the feed port of the tertiary scavenging flotation machine 83, the concentrate outlet of the tertiary scavenging flotation machine 83 is connected to the feed port of the secondary scavenging flotation machine 82, and the concentrate outlet of the secondary scavenging flotation machine 82 is connected to the feed port of the primary scavenging flotation machine 81.

[0015] Working principle: The raw ore is sent to the first ball mill 1 for ball milling. During the ball milling process, sodium sulfide and zinc sulfate are added. The milled material is sent to the classifier 2 for classification. The large particles are sent back to the first ball mill 1 for re-ball milling. The small particles are sent to the buffer box 3 to mix with sulfide and sodium sulfite. The mixed material is sent to the cyclone 12 for classification again, and the material and the reagent are fully mixed. The large particles are sent to the second ball mill 13 for ball milling. After ball milling, the particles are returned to the buffer box 3, the particles with small size are sent to the flotation mixing barrel 4, and zinc sulfate and sodium sulfite are added again for mixing, and the mixed pulp is sent to the first roughing flotation machine 5 for roughing, the concentrate is sent to the primary concentrating flotation machine 71 for flotation, and the tailings are sent to the primary scavenging flotation machine 81 for scavenging; the tailings floated by the primary concentrating flotation machine 71 and the concentrate scavenged by the primary scavenging flotation machine 81 are sent to the second roughing flotation machine 6 for secondary roughing, so as to avoid sending them to the second roughing flotation machine 6 for secondary roughing, so as to avoid sending them to the first roughing flotation machine 6 for secondary roughing. The concentrate is sent to the first roughing flotation cell 5 for flotation with the original ore pulp, which improves the lead-zinc separation effect and thus improves the quality of the subsequent lead concentrate product; the concentrate from the secondary roughing is sent to the primary concentrating flotation cell 71 for flotation, and the tailings are sent to the primary scavenging flotation cell 81 for scavenging; the concentrate floated by the primary concentrating flotation cell 71 is sent to the secondary concentrating flotation cell 72 for flotation, until the lead concentrate is obtained by flotation of the fourth concentrating flotation cell 74, and the tailings floated by the fourth concentrating flotation cell 74 are sent to The tailings from the secondary roughing selection are sent to the primary scavenging flotation cell 81 for scavenging, and the scavenged tailings are sent to the secondary scavenging flotation cell 82 until the lead tailings are scavenged by the fourth scavenging flotation cell 84; the concentrate scavenged by the fourth scavenging flotation cell 84 is sent to the third scavenging flotation cell 83 until the concentrate scavenged by the second scavenging flotation cell 82 is sent to the first scavenging flotation cell 81.

[0016] The raw ore with a lead grade of 1.31%, a zinc grade of 1.37% and a silver grade of 95 g / t is put into the first ball mill 1 for grinding, and 130 g / t of sodium sulfide and 200 g / t of zinc sulfate are added at the same time; 300 g / t of zinc sulfate and 150 g / t of sodium sulfite are added to the slurry in the buffer box; 250 g / t of zinc sulfate and 120 g / t of sodium sulfite are added to the slurry in the flotation mixing tank 4 for rough lead concentration; the raw ore and the obtained lead concentrate and tailings are separated and tested, and the specific results are shown in Table 1.

[0017] Table 1

[0018]

[0019] From the test results in Table 1, it can be seen that the lead recovery rate is 83.92%, the zinc recovery rate is 18.86%, the silver recovery rate is 85.71%, the lead grade is 47.33%, the silver grade is 3510g / t, and the zinc content in the lead concentrate is 11.14%.

[0020] Comparative Example 1: Its overall structure is the same as that of Example 1, except that the raw ore with a lead grade of 1.22%, a zinc grade of 1.34% and a silver grade of 91 g / t is put into the first ball mill 1 for grinding, and then after classification by the classifier 2 and the cyclone 12, the slurry enters the flotation stirring barrel 4, and 130 g / t of sodium sulfide, 750 g / t of zinc sulfate and 270 g / t of sodium sulfite are added at the same time, and then the lead is roughly concentrated; the raw ore and the obtained lead concentrate and tailings are separated and tested, and the specific results are shown in Table 2.

[0021] Table 2

[0022]

[0023] From the test results in Table 2, it can be seen that the lead recovery rate is 82.27%, the zinc recovery rate is 27.67%, the silver recovery rate is 84.92%, the lead grade is 43.31%, the silver grade is 3331g / t, and the zinc content in the lead concentrate is 15.98%.

[0024] Comparative Example 2: Its overall structure is the same as that of Example 1, except that the raw ore with a lead grade of 1.29%, a zinc grade of 1.28% and a silver grade of 87 g / t is fed into the first ball mill 1 for grinding. The tailings floated by the primary concentration flotation machine 71 and the concentrate scavenged by the primary scavenging flotation machine 81 are sent to the first roughing flotation machine 5 and mixed with the raw ore for roughing; the raw ore and the obtained lead concentrate and tailings are separated and tested, and the specific results are shown in Table 3.

[0025] Table 3

[0026]

[0027] From the test results in Table 3, it can be seen that the lead recovery rate is 83.04%, the zinc recovery rate is 24.87%, the silver recovery rate is 83.96%, the lead grade is 44.89%, the silver grade is 3082g / t, and the zinc content in the lead concentrate is 13.43%.

[0028] It can be clearly seen from the above experiments that the zinc content in the lead concentrate in Example 1 of the utility model is the lowest, so the use of the utility model improves the lead-zinc separation effect, thereby improving the quality of subsequent lead concentrate products.

[0029] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A mineral processing system for reducing the zinc metal content in lead concentrate, characterized in that; It comprises a first ball mill, a classifier, a buffer box, a flotation stirring barrel, a first roughing flotation machine, a second roughing flotation machine, a concentration system, a scavenging system, a sodium sulfide storage tank, a zinc sulfate storage tank and a sodium sulfite storage tank; the discharge port of the first ball mill is connected to the feed port of the classifier, the fine material outlet of the classifier is connected to the feed port of the buffer box, the discharge port of the buffer box is connected to the feed port of the flotation stirring barrel, the discharge port of the flotation stirring barrel is connected to the feed port of the first roughing flotation machine, the concentrate outlet of the first roughing flotation machine is connected to the feed port of the primary concentration flotation machine of the concentration system, the tailings outlet of the first roughing flotation machine is connected to the primary scavenging outlet of the scavenging system The feed port of the first-level selecting flotation machine is connected, the tailings outlet of the first-level selecting flotation machine and the concentrate outlet of the first-level scavenging flotation machine are both connected to the feed port of the second roughing flotation machine; the concentrate outlet of the second roughing flotation machine is connected to the feed port of the first-level selecting flotation machine, and the tailings outlet of the second roughing flotation machine is connected to the feed port of the first-level scavenging flotation machine; the drug outlets of the sodium sulfide drug storage tank and the zinc sulfate drug storage tank are both connected to the drug inlet of the first ball mill, the drug outlets of the zinc sulfate drug storage tank and the sodium sulfite drug storage tank are both connected to the drug inlet of the cache box, and the drug outlets of the zinc sulfate drug storage tank and the sodium sulfite drug storage tank are both connected to the drug inlet of the flotation stirring barrel.

2. A mineral processing system for reducing the zinc metal content in lead concentrate according to claim 1, characterized in that: It also includes a cyclone and a second ball mill; the discharge port of the cache box is connected to the feed port of the cyclone, and the fine material outlet of the cyclone is connected to the feed port of the flotation stirring barrel; the coarse material outlet of the cyclone is connected to the feed port of the second ball mill, and the discharge port of the second ball mill is connected to the feed port of the cache box.

3. A mineral processing system for reducing the zinc metal content in lead concentrate according to claim 1, characterized in that: The beneficiation system includes the primary beneficiation flotation machine, the secondary beneficiation flotation machine, the tertiary beneficiation flotation machine and the quaternary beneficiation flotation machine; the concentrate outlet of the primary beneficiation flotation machine is connected with the feed inlet of the secondary beneficiation flotation machine, the concentrate outlet of the secondary beneficiation flotation machine is connected with the feed inlet of the tertiary beneficiation flotation machine, the concentrate outlet of the tertiary beneficiation flotation machine is connected with the feed inlet of the quaternary beneficiation flotation machine; the tailings outlet of the quaternary beneficiation flotation machine is connected with the feed inlet of the tertiary beneficiation flotation machine, the tailings outlet of the tertiary beneficiation flotation machine is connected with the feed inlet of the secondary beneficiation flotation machine, and the tailings outlet of the secondary beneficiation flotation machine is connected with the feed inlet of the primary beneficiation flotation machine.

4. A mineral processing system for reducing the zinc metal content in lead concentrate according to claim 1, characterized in that: The scavenging system includes the primary scavenging flotation machine, the secondary scavenging flotation machine, the tertiary scavenging flotation machine and the quaternary scavenging flotation machine; the tailings outlet of the primary scavenging flotation machine is connected to the feed inlet of the secondary scavenging flotation machine, the tailings outlet of the secondary scavenging flotation machine is connected to the feed inlet of the tertiary scavenging flotation machine, and the tailings outlet of the tertiary scavenging flotation machine is connected to the feed inlet of the quaternary scavenging flotation machine; the concentrate outlet of the quaternary scavenging flotation machine is connected to the feed inlet of the tertiary scavenging flotation machine, the concentrate outlet of the tertiary scavenging flotation machine is connected to the feed inlet of the secondary scavenging flotation machine, and the concentrate outlet of the secondary scavenging flotation machine is connected to the feed inlet of the primary scavenging flotation machine.

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