A flotation adjustment agent for high-muddy lead-zinc oxide ores and its application method

Abstract

The present invention discloses a combined flotation regulator for high-mud lead-zinc oxide ores and its application method. The combined regulator consists of regulator A and regulator B in a mass ratio of 1:(3-10); regulator A is a high-molecular polysaccharide substance; regulator B consists of B1 and B2, with B1 being 80-90 parts by mass and B2 being 10-20 parts by mass; B1 is sodium silicate, and B2 is at least one of polyaminopolyether methylene phosphonic acid, polyepoxysuccinic acid, and 2-butanephosphonate-1,2,4-tricarboxylic acid. The application method is as follows: grinding the raw ore, sequentially adding sodium carbonate, regulator A, regulator B, and sodium sulfide for slurry mixing, and finally adding a collector for zinc oxide mineral flotation to obtain a zinc oxide coarse concentrate. The present invention can effectively recover zinc oxide minerals in high-mud lead-zinc oxide ores, the reagent components are non-toxic and harmless, the application method is simple, and it is convenient for large-scale production management.

Description

Technical Field

[0001] The invention belongs to the technical field of mineral processing engineering, and particularly relates to a combined flotation regulator for high-argillaceous lead-zinc oxide ores and an application method thereof. Background Art

[0002] Zinc metal, due to its excellent corrosion and wear resistance, is widely used in industries such as construction, transportation, electronics and electrical equipment, and machinery, resulting in significant annual consumption. With the extensive development of high-quality zinc sulfide ores, major zinc sulfide resources, such as sphalerite, have become poor, fine, and mixed. As another important form of zinc resource, the efficient development and recovery of zinc oxide is crucial for the sustainable utilization of zinc.

[0003] Zinc oxide ore resources are complex and severely muddy. Currently, the main methods for its recovery include sulfide-xanthate flotation, sulfide-amine flotation, fatty acid direct flotation, and flocculation flotation. Sulfide-amine flotation is the predominant and effective separation method. Due to the low mass, high surface energy, and high specific surface area of fine-grained slime, when the zinc oxide ore has a high oxidation rate and a high content of argillaceous gangue minerals, the presence of slime can lead to mechanical entrainment, slime capping, and flotation foam sticking. This reduces the selectivity of the sulfide-amine flotation method, significantly increases reagent usage, and prevents the production of high-quality products. Furthermore, the desludging process results in significant zinc metal loss.

[0004] Based on the problem that the ore slime in high-argillaceous lead-zinc oxide ores seriously deteriorates the flotation separation process, the present invention proposes a combined regulator and applies it in combination with the sulfide-amine flotation method. Summary of the Invention

[0005] In view of the shortcomings of the existing technology, the purpose of the present invention is to provide a flotation regulator for high-argillaceous lead-zinc ore and its application method, so as to solve the problem of poor separation index caused by argillaceous gangue minerals in the sulfide-amine flotation process.

[0006] In order to achieve the above technical objectives, the present invention provides the following technical solutions:

[0007] The combined flotation regulator for high-mud oxidized lead-zinc ore provided by the present invention is composed of regulator A and regulator B in a mass ratio of 1:(3-10); the regulator A is a high-molecular polysaccharide substance; the regulator B is composed of the following components in parts by mass: 80-90 parts of regulator B1 and 20-10 parts of regulator B2; the regulator B1 is sodium silicate, and the regulator B2 is a high-efficiency scale inhibitor.

[0008] Preferably, the high molecular weight polysaccharide substance is at least one of guar gum, locust bean gum, carrageenan and pectin.

[0009] Preferably, the high-efficiency scale inhibitor is at least one of polyaminopolyether methylene phosphoric acid, polyepoxysuccinic acid, and 2-phosphonobutane-1,2,4-tricarboxylic acid.

[0010] Preferably, when the combined regulator is used for flotation of high-mud oxidized lead-zinc ore, the regulator A is first added to the slurry, and then the regulator B is added.

[0011] Preferably, the method of adding the adjusting agent B is to add adjusting agent B1 and adjusting agent B2 to the ore pulp at the same time.

[0012] The application method of the combined flotation regulator for high-argillaceous lead-zinc oxide ores provided by the present invention comprises the following steps: grinding the raw ore, sequentially adding sodium carbonate, the regulator A, the regulator B, and sodium sulfide for slurry preparation, and finally adding a collector for flotation of the zinc oxide mineral to obtain a coarse zinc oxide concentrate.

[0013] Preferably, the raw ore is ground to a particle size of -0.074 mm, accounting for 75-90%.

[0014] Preferably, based on the mass of the original ore, the amount of sodium carbonate added is 1000-5000 g / t.

[0015] Preferably, based on the mass of the original ore, the added amount of the adjusting agent A is 100-500 g / t.

[0016] Preferably, based on the mass of the original ore, the added amount of the adjusting agent B is 500-2500 g / t.

[0017] Preferably, based on the mass of the original ore, the amount of sodium sulfide added is 5000-40000 g / t.

[0018] Preferably, the collector is one or more of dodecylamine, hexadecylamine, and octadecylamine; and based on the mass of the original ore, the added amount of the collector is 50-400 g / t.

[0019] Beneficial effects of the present invention:

[0020] The present invention provides a flotation combination regulator for high-argillaceous lead-zinc ore and its application, which has a good flotation effect on lead-zinc ore with high argillaceous mineral content and severe mudification. The high-molecular polysaccharide organic regulator A achieves a selective flocculation effect on minerals such as calcite, dolomite, and kaolinite, thereby increasing the apparent particle size of the gangue minerals. The regulator B is then used to disperse and inhibit the gangue minerals. At the same time, the regulator B can prevent excessive Ca in the solution from 2+The formation of CaCO3 on the surface of zinc oxide minerals can effectively inhibit the gangue minerals. At the same time, it can minimize the adverse consequences of low concentrate grade caused by mechanical entrainment of fine-grained gangue minerals into the flotation concentrate, and effectively prevent the occurrence of surface homogenization of zinc oxide minerals and gangue minerals, ultimately achieving the purpose of improving concentrate grade and recovery rate and reducing collector consumption.

[0021] In summary, the combined regulator of the present invention is environmentally friendly and pollution-free, has a simple application method, is easy to industrially produce, has good adaptability to lead-zinc oxide ores with high argillaceous mineral content and severe mudification, and can obtain better zinc oxide flotation indicators. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 The present invention discloses an application process of a combined flotation regulator for high-muddy lead-zinc oxide ores. Specific implementation plan

[0023] In order to make the purpose, application method and beneficial effects of the present invention clearer, the embodiments of the present invention will be described in detail below to facilitate the understanding of technicians.

[0024] Example 1

[0025] The regulator A used in this embodiment is guar gum, and the regulator B is composed of the following components in parts by mass: 80 parts of sodium silicate and 20 parts of polyaminopolyether methylene phosphoric acid.

[0026] The Pb content of a certain high-argillaceous lead-zinc oxide ore is 1.35%, the Zn content is 7.10%, the Fe content is 6.88%, and the Ca content is 17.41%. The specific flotation process is as follows:

[0027] The high-argillaceous lead-zinc oxide ore was ground to a particle size of -0.074 mm, accounting for 75%. Based on the mass of the ore, 2000 g / t of sodium carbonate, 200 g / t of guar gum, 800 g / t of sodium silicate + 200 g / t of polyamino polyether methylene phosphoric acid, and 20,000 g / t of sodium sulfide were added in sequence for slurry preparation. Finally, 200 g / t of collector dodecylamine was added for zinc oxide mineral flotation to obtain a coarse zinc oxide concentrate. The test results are shown in Table 1.

[0028] Comparative Example 1

[0029] Other conditions were consistent with those in Example 1, except that guar gum was not added. The test results are shown in Table 1.

[0030] Comparative Example 2

[0031] Other conditions were consistent with those in Example 1, except that sodium silicate and polyaminopolyether methylene phosphoric acid were not added. The test results are shown in Table 1.

[0032] Comparative Example 3

[0033] Other conditions are consistent with those of Example 1, except that the adjuster B is only sodium silicate and does not contain polyaminopolyether methylene phosphate. The test results are shown in Table 1.

[0034] Comparative Example 4

[0035] Other conditions are consistent with those of Example 1, except that the adjuster B is only polyaminopolyether methylene phosphoric acid and does not contain sodium silicate. The test results are shown in Table 1.

[0036] Table 1 Flotation test results / %

[0037]

[0038]

[0039] Example 2

[0040] The regulator A used in this embodiment is composed of the following components in parts by mass: 25 parts of guar gum, 25 parts of locust bean gum, 25 parts of carrageenan, and 25 parts of pectin; the regulator B is composed of the following components in parts by mass: 90 parts of sodium silicate and 10 parts of polyepoxysuccinic acid.

[0041] The Pb content of a certain high-argillaceous lead-zinc oxide ore is 1.07%, the Zn content is 8.49%, the Fe content is 5.94%, and the Ca content is 12.77%. The specific flotation process is as follows:

[0042] The high-argillaceous lead-zinc oxide ore was ground to a particle size of -0.074 mm, accounting for 90%. 5000 g / t of sodium carbonate, 500 g / t of adjusting agent A, 2500 g / t of adjusting agent B, and 40000 g / t of sodium sulfide were added in sequence for slurry preparation. Finally, 400 g / t of collecting agent dodecylamine was added for zinc oxide mineral flotation to obtain a coarse zinc oxide concentrate. The test results are shown in Table 2.

[0043] Comparative Example 5

[0044] Other conditions were consistent with those in Example 2, except that the adjuster A was not added. The test results are shown in Table 2.

[0045] Comparative Example 6

[0046] Other conditions were consistent with those in Example 2, except that the adjuster B was not added. The test results are shown in Table 2.

[0047] Comparative Example 7

[0048] Other conditions are consistent with those of Example 2, except that the regulator B is only sodium silicate and does not contain polyepoxysuccinic acid. The test results are shown in Table 2.

[0049] Comparative Example 8

[0050] Other conditions are consistent with those of Example 2, except that the regulator B is only polyepoxysuccinic acid and does not contain sodium silicate. The test results are shown in Table 2.

[0051] Table 2 Flotation test results / %

[0052]

[0053] Example 3

[0054] The regulator A used in this embodiment is locust bean gum; the regulator B is composed of the following components by mass: 85 parts of sodium silicate and 15 parts of 2-phosphonobutane-1,2,4-tricarboxylic acid.

[0055] The Pb content of a certain high-argillaceous lead-zinc oxide ore is 1.07%, the Zn content is 8.49%, the Fe content is 5.94%, and the Ca content is 12.77%. The ore used is the same as that in Example 2. The specific flotation process is as follows:

[0056] The high-argillaceous lead-zinc oxide ore was ground to a particle size of -0.074 mm, accounting for 85%. 3500 g / t of sodium carbonate, 350 g / t of adjusting agent A, 2000 g / t of adjusting agent B, and 30,000 g / t of sodium sulfide were added in sequence for slurry preparation. Finally, 300 g / t of collecting agent dodecylamine was added for zinc oxide mineral flotation to obtain a coarse zinc oxide concentrate. The test results are shown in Table 3.

[0057] Table 3 Flotation test results / %

[0058]

[0059] Example 4

[0060] In this example, the conditioning agent A used was pectin; conditioning agent B was composed of the following components by weight: 80 parts sodium silicate, and 20 parts conditioning agent B2. Conditioning agent B2 was composed of the following components by weight: 30 parts polyaminopolyether methylene phosphonic acid, 40 parts polyepoxysuccinic acid, and 30 parts 2-phosphonobutane-1,2,4-tricarboxylic acid.

[0061] The Pb content of a certain high-argillaceous lead-zinc oxide ore is 1.07%, the Zn content is 8.49%, the Fe content is 5.94%, and the Ca content is 12.77%. The ore used is the same as that in Example 2. The specific flotation process is as follows:

[0062] The high-argillaceous lead-zinc oxide ore was ground to a particle size of -0.074 mm, accounting for 85%. 3500 g / t of sodium carbonate, 400 g / t of adjusting agent A, 2000 g / t of adjusting agent B, and 30,000 g / t of sodium sulfide were added in sequence for slurry preparation. Finally, 300 g / t of collecting agent dodecylamine was added for zinc oxide mineral flotation to obtain a coarse zinc oxide concentrate. The test results are shown in Table 4.

[0063] Table 4 Flotation test results / %

[0064]

[0065] In summary, it can be seen that without any one component of Adjuster A or Adjuster B (Adjuster B1 or Adjuster B2), it is difficult to achieve optimal flotation performance. Their combination exerts a strong positive synergistic effect. After the high molecular weight polysaccharide Adjuster A acts on the mineral surface, Adjuster B can more effectively demonstrate its ability to disperse and inhibit argillaceous gangue minerals. Adjusters B1 and B2 in Adjuster B also exert different effects, each with different mechanisms of action for reducing the impact of argillaceous minerals. Their combined use results in a synergistic effect.

Claims

1. A flotation method for a high-argillaceous lead-zinc oxide ore, comprising the following steps: grinding the raw ore, sequentially adding sodium carbonate, a combination regulator, and sodium sulfide for slurry preparation, and finally adding a collector for flotation of the zinc oxide ore to obtain a coarse zinc oxide concentrate; The combined regulator is composed of regulator A and regulator B in a mass ratio of 1:(3-10); the regulator A is a high molecular weight polysaccharide; and the regulator B is composed of the following components in parts by mass: Adjuster B1 is 80-90 parts, and adjuster B2 is 20-10 parts; The adjusting agent B1 is sodium silicate, and the adjusting agent B2 is a high-efficiency scale inhibitor; The high molecular weight polysaccharide substance is at least one of guar gum, locust bean gum, carrageenan and pectin; the high efficiency scale inhibitor is at least one of polyaminopolyether methylene phosphate, polyepoxysuccinic acid and 2-phosphonobutane-1,2,4-tricarboxylic acid.

2. The flotation method according to claim 1, wherein: The raw ore is ground to a particle size of -0.074 mm, accounting for 75-90%.

3. The flotation method according to claim 1, wherein: Based on the mass of the original ore, the amount of sodium carbonate added is 1000-5000 g / t.

4. The flotation method according to claim 1, wherein: Based on the mass of the original ore, the addition amount of the adjusting agent A is 100-500 g / t.

5. The flotation method according to claim 1, wherein: Based on the mass of the original ore, the addition amount of the adjusting agent B is 500-2500 g / t.

6. The flotation method according to claim 1, wherein: Based on the mass of the original ore, the amount of sodium sulfide added is 5000-40000 g / t.

7. The flotation method according to claim 1, wherein: The collector is one or more of dodecylamine, hexadecylamine, and octadecylamine; and based on the mass of the original ore, the added amount of the collector is 50-400 g / t.

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