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Method for efficiently selecting lead with high-enriched fineness

A high-density, high-efficiency technology, applied in flotation, solid separation and other directions, can solve the problems of unimproved mineral monomer dissociation degree, low index, and too much water for beneficiation, so as to achieve high-efficiency separation and cleaning of lead. The effect of production, saving electricity consumption and improving lead beneficiation index

Active Publication Date: 2009-12-02
南京银茂铅锌矿业有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, in the case of one-stage grinding, the concentration of graded pulp is generally ≤35%, and the final graded fineness -0.074mm accounts for ≤75%, so that the dissociation degree of useful mineral monomers cannot be improved, and the separation effect of mineral processing is poor.
At the same time, due to the low initial concentration of flotation, large pulp volume, and many flotation equipments, the power consumption of ore dressing is high, the consumption of reagents is high, the flotation time is relatively short, the index is low, and the water for ore dressing is also large. problem of large quantity

Method used

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  • Method for efficiently selecting lead with high-enriched fineness
  • Method for efficiently selecting lead with high-enriched fineness
  • Method for efficiently selecting lead with high-enriched fineness

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Embodiment 1 (test)

[0016] Through sampling assay, the character of raw ore in the present embodiment is: lead-zinc sulfide ore raw ore multi-genus content (wt%): Pb3.5, Zn6.5, S27, Ag175g / t. Ore oxidation rate: Pb4.25%, Zn5.14%.

[0017] see figure 2 , in the case of the first-stage mill, the raw ore is sent to the spiral classifier after being ball milled by the ball mill for classification, and the pulp overflowed from the spiral classifier is sent to the cyclone for classification, and the fineness qualified pulp overflowed from the cyclone is sent to the The thickener is concentrated and reaches the following indicators before being sent to the floating washing machine for lead selection:

[0018] The pulp Ph ​​11.5, the pulp concentration is 35%, and the grinding fineness is 0.074mm (-200 mesh) is 70%-90%.

[0019] The present embodiment adopts conventional prior art to carry out the lead selection operation (the following examples are the same), and the med...

Embodiment 2

[0026] Embodiment 2 (test)

[0027] The ore properties and mineral composition of the present embodiment are the same as in Example 1, and the relevant process steps are also the same as in Example 1.

[0028] The pulp with qualified fineness overflowed from the cyclone is sent to the thickener for thickening and reaches the following indicators before being sent to the float washing machine for lead selection:

[0029] The pulp Ph ​​11.5; the pulp concentration is 35%-50%, and the grinding fineness -200 mesh (-0.074mm) is 75%.

[0030] The chemical system when selecting lead is: aniline 30g / t, sulfur nitrogen 15g / t, zinc sulfate 1500g / t, sodium sulfite 600g / t, terpineol oil 30g / t.

[0031] The laboratory closed-circuit results of this embodiment are shown in Table 2.

[0032] Table 2: Comparative results of test index of embodiment 2

[0033]

[0034] Another key link of the present invention is to increase the pulp concentration from 20%-25% to 50%-55% through the thic...

Embodiment 3

[0036] Embodiment 3 (test)

[0037] The ore properties and mineral composition of this embodiment are the same as those in Example 1, and the relevant process steps are also the same as in Example 1.

[0038] The pulp with qualified fineness overflowed from the cyclone is sent to the thickener for thickening and reaches the following indicators before being sent to the float washing machine for lead selection:

[0039] The pulp Ph ​​11.5; the pulp concentration is 50%, and the grinding fineness -200 mesh (-0.074mm) is 85%.

[0040] The chemical system when selecting lead is: aniline 30g / t, sulfur nitrogen 15g / t, zinc sulfate 1500g / t, sodium sulfite 600g / t, terpineol oil 30g / t.

[0041] The laboratory closed-circuit results of this embodiment are shown in Table 3.

[0042] Table 3: Comparative results of test index in embodiment 3

[0043]

[0044] Compared with the traditional one-stage grinding and spiral classifier process, this embodiment reduces the grinding fineness...

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Abstract

The invention relates to a method for effectively selecting lead with high-enriched fineness. The method is characterized in that under a condition of one-stage grinding, green ore is sent into a spiral classifier for classification after the green ore is subjected to ball milling through a ball miller; ore slurry overflowing from the spiral classifier is sent into a whirlcone for classifying; the ore slurry with qualified fineness overflowing from the whirlcone is sent into a thickener for concentrating, and is sent into a flotation washer for lead selection. When the method is adopted to carry out floatation on lead-zinc sulphide ore, the recovery rate of lead selection is improved by 2 percentage, the lead concentrate grade is improved by 2 percentage, the recovery rate of silver in lead is improved by 5 percentage, the flotation energy consumption is reduced by 20 percent, and medicaments for lead selection are reduced by 15 percent. The method not only can greatly improve lead dressing index, and save electricity consumption of lead dressing and medicament consumption, but also can realize quick cyclic utilization of lead dressing wastewater and partial lead dressing medicament, prevent pollution to the environment, and finally realize high efficiency separation and clean production of lead dressing. The method is also applicable to multiple-metal reclamation of other sulfide ores.

Description

technical field [0001] The invention relates to a high-concentration and fineness high-efficiency lead selection process, which can increase the concentration and fineness of the selection in the case of one-stage grinding, so that the useful mineral monomers can be fully dissociated, thereby significantly improving the selection process. Lead index, greatly reducing the power consumption and chemical consumption of lead selection, and realizing the quick and direct reuse of lead selection wastewater, especially suitable for the mineral processing of lead-zinc sulfide ore. The invention is also applicable to the beneficiation of other polymetallic sulfide ores. Background technique [0002] At present, non-ferrous metal beneficiation at home and abroad must be ground and classified. Considering the cost problem, one-stage grinding is often used. Since increasing the concentration and simultaneously increasing the fineness are a pair of contradictions, it is often impossible ...

Claims

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Application Information

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IPC IPC(8): B03D1/00B03D103/02
Inventor 缪建成马斌刘亚龙汤成龙陈如风芮凯董宗良胡继华
Owner 南京银茂铅锌矿业有限公司
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