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Beneficiation method of lead-zinc oxide mine difficult to beneficiate

A technology of lead-zinc oxide and beneficiation method, applied in chemical instruments and methods, wet separation, solid separation and other directions, can solve the problem of no beneficiation method for lead-zinc oxide ore, etc., and achieve the improvement of resource utilization rate, sedimentation performance improvement, cost low cost effect

Active Publication Date: 2011-01-05
CHANGSHA RES INST OF MINING & METALLURGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There is currently no suitable beneficiation method for the particularly difficult-to-select lead-zinc oxide ores and they are all stockpiled

Method used

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  • Beneficiation method of lead-zinc oxide mine difficult to beneficiate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Embodiment 1: see figure 1 Non-granulation and roasting of medium raw materials-lead-zinc priority flotation scheme

[0028] The raw ore contains 1.5% lead and 6.5% zinc, crushed to -10mm, mixed with 1.0% NaCl, added 0.5% reducing agent coal in the rotary kiln and roasted at 750°C for 150 minutes, then directly water quenched, the roasting after water quenching After the ore is ground to -200 mesh 90% (basic monomers of useful minerals are dissociated), the conventional lead-zinc sulfide ore lead-zinc priority flotation process is followed: the lead flotation system obtains a grade of 30-35% through one rough, one sweep and three fine , The lead concentrate with a recovery rate of about 75%, and the zinc flotation system can obtain zinc concentrate with a grade of 40-45% and a recovery rate of 75-80% through the first roughing, second sweeping and third refining. The flotation tailings after flotation can be recovered by magnetic separation.

Embodiment 2

[0029] Example 2: see figure 1 Non-granulating roasting of medium raw materials-lead-zinc mixed flotation scheme

[0030] The raw ore contains 1.5% lead and 6.5% zinc, crushed to -3mm, adding 0.5% coal and 1.0% FeCl 3 Mix evenly, roast in a rotary kiln at 750°C for 120 minutes, and then quench directly in water. Grind the roasted ore in a rod mill to -200 mesh 90% (dissociation of the basic monomer of useful minerals) and then mix and float it with conventional lead-zinc sulfide ore. The separation process is to obtain a mixed concentrate with a grade of Pb+Zn>40% and a recovery rate of lead and zinc of about 80% through one roughing, two sweeping and three fines. The flotation tailings after flotation can be recovered by magnetic separation.

Embodiment 3

[0031] Embodiment 3: see figure 2 Medium raw material granulation roasting-lead-zinc mixed flotation scheme

[0032] The raw ore contains 1.5% lead, 6.5% zinc, crushed to -3mm, added 0.5% coal, 1.0% catalyst NaCl and 3% bentonite, mixed and pre-ground to about 40% -200 mesh, then granulated, and rotated at 750°C After kiln roasting for 90 minutes, it is directly water-quenched, and the roasted ore is ground in a rod mill to -200 mesh 90% (the basic monomer of useful minerals is dissociated). Sanjing can obtain a mixed concentrate with a grade of Pb+Zn>40% and a lead-zinc recovery rate of about 80%. For the flotation tailings after flotation, the iron concentrate can be recovered by magnetic separation.

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Abstract

The invention relates to a beneficiation method of a lead-zinc oxide mine difficult to beneficiate, which comprises the steps of crushing ores of the lead-zinc oxide mine difficult to beneficiate, grinding ores, uniformly mixing the ores, a catalyst and coal and then roasting; or crushing the ores of the lead-zinc oxide mine difficult to beneficiate, grinding the ores with the catalyst and the coal, and roasting so as to transform the lead-zinc oxide ores difficult to beneficiate into sulfide minerals easy to float as well as weak-magnetism iron trioxide minerals into strong-magnetism ferroferric oxide; floating by adopting a method for floating lead-zinc sulfate minerals to obtain lead concentrate, zinc concentrate or lead-zinc concentrate; and recovering iron ore concentrate by carrying out a magnetic method on tailings left after beneficiating lead-zinc minerals. The method can synthetically recover useful elements in the ores of the lead-zinc oxide mine difficult to beneficiate and has the characteristics of high concentrate grade and high recovery rate.

Description

technical field [0001] The invention belongs to the technical field of beneficiation of nonferrous metal ores, and relates to a beneficiation method of refractory lead-zinc oxide ore. Background technique [0002] my country is rich in lead-zinc mineral resources, among which the basic reserve of lead reaches 12.84 million tons, and the resource reserve reaches 37.57 million tons; the basic reserve of zinc reaches 37.63 million tons, and the resource reserve reaches 92.67 million tons, ranking third in the world after Australia and the United States bit. However, there are a large number of low-grade lead-zinc oxide ores, which cannot be directly utilized, nor can they be well beneficiated and enriched. [0003] Lead oxide ores of industrial significance mainly include white lead ore (PbCO 3 ) and lead alum (PbSO 4 ), and symbiotic calcite, barite, galena, molybdenum and so on. The purer lead oxide minerals are easy to vulcanize, so they are treated with vulcanization fir...

Claims

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Application Information

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IPC IPC(8): B03B7/00B03B1/00
Inventor 石云良刘忠荣陈启平刘苗华肖金雄薛生晖黎红兵张茂陈军胡芳龙艳
Owner CHANGSHA RES INST OF MINING & METALLURGY
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