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Separation method for treating low-grade refractory zinc lead oxide ores

A technology of lead-zinc oxide and beneficiation method, which is applied in chemical instruments and methods, wet separation, solid separation, etc., can solve the problems of high cost and inapplicability, and achieve the effects of small investment, reduced beneficiation cost and large processing capacity

Active Publication Date: 2012-11-07
青海鸿鑫矿业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, if this method is used to directly process low-grade and high-impurity lead-zinc oxide ores, it is not applicable due to the high cost
Therefore, the treatment of low-grade refractory lead-zinc oxide ore is still an unresolved major technical problem so far.

Method used

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  • Separation method for treating low-grade refractory zinc lead oxide ores

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] The raw ore composition of the processed lead-zinc oxide ore: Zn 7.81%, Pb 1.49%, Fe 5.55%, CaO 29.13%, MgO 0.47%, SiO 2 20.04%, lead oxidation rate 89.45%, zinc oxidation rate 91.30%.

[0031] Above-mentioned raw ore is passed through following processing steps:

[0032] (1) Crushing all the raw ore to -10mm;

[0033] (2) Sieve the crushed ore into four grades: -10mm~+0.5mm, -0.5mm~+0.2mm, -0.2mm~+0.074mm, -0.074mm;

[0034] (3) Sorting the raw ore with a particle size of -10mm to +0.5mm in a dense medium cyclone with a separation specific gravity of 2.85, the resuspension liquid is prepared with ferrosilicon powder, and the lead-zinc mixed concentrate is separated;

[0035] (4) Feed the raw ore with particle size of -0.5mm~+0.2mm to the coarse sand bed for shaker gravity separation operation, the feeding concentration is 30%; feed the raw ore with particle size of -0.2mm~+0.074mm to the fine sand shaker gravity separation operation on the rocker bed, and the ore c...

Embodiment 2

[0039]The composition of the processed lead-zinc oxide ore: Zn 9.76%, Pb 2.12%, Fe 8.51%, CaO 18.23%, MgO 3.23%, SiO 2 16.52%, lead oxidation rate 87.31%, zinc oxidation rate 90.05%.

[0040] Above-mentioned raw ore is passed through following processing steps:

[0041] (1) Crushing all the raw ore to -10mm;

[0042] (2) Sieve the crushed ore into four grades: -10mm~+0.5mm, -0.5mm~+0.2mm, -0.2mm~+0.074mm, -0.074mm;

[0043] (3) Sorting the raw ore with a grain size of -10mm ~ +0.5mm in a dense medium cyclone with a dense medium separation specific gravity of 2.80, the resuspension liquid is prepared with ferrosilicon powder, and the lead-zinc mixed concentrate is separated;

[0044] (4) Feed the raw ore with particle size of -0.5mm~+0.2mm to the coarse sand bed for shaking table gravity separation operation, the feeding concentration is 30%, after shaking table rough separation, lead-zinc mixed rough concentrate, middle ore and Tailings, lead-zinc mixed coarse concentrate ...

Embodiment 3

[0048] The raw ore composition of zinc oxide ore processed: Zn 12.45%, Pb 1.95%, Fe 9.32%, CaO 22.13%, MgO 2.85%, SiO 2 14.65%, lead oxidation rate 81.85%, zinc oxidation rate 83.75%.

[0049] Above-mentioned raw ore is passed through following processing steps:

[0050] (1) Crushing all the raw ore to -16mm;

[0051] (2) Sieve the crushed ore into four grades: -16mm~+0.5mm, -0.5mm~+0.15mm, -0.15mm~+0.037mm, and -0.037mm;

[0052] (3) Sorting the raw ore with a particle size of -16mm to +0.5mm in a dense medium cyclone with a separation specific gravity of 2.75, the resuspension liquid is prepared with magnet powder, and the lead-zinc mixed concentrate is separated;

[0053] (4) Feed the raw ore with particle size of -0.5mm~+0.15mm to the coarse sand bed for shaking table gravity separation operation, the feeding concentration is 30%. Tailings and sub-concentrates are re-grinded and concentrated on a shaking table to obtain lead-zinc mixed concentrate, middle ore and taili...

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Abstract

The invention provides a separation method for treating low-grade refractory zinc lead oxide ores, which adopts a full heavy separation process. The method is implemented in a way that: all raw ores are crushed into particles of which the maximum particle size upper limit is 20-5mm; the crushed ores are screened into two size grades +0.5mm and -0.5mm; and the two size grades of crushed ores are respectively subjected to heavy-media separation and rocker re-separation to obtain lead-zinc mixed concentrate products which can be used as raw materials for the next technical step of oxygen pressure acid leaching. The technical process is simple and easy to operate; and the invention has the advantages of lower ore grinding amount, low separation cost, no need of any reagent, small environmental pollution, favorable technical indexes and the like, can recycle the backwater, greatly enhances the recovery rate of metals lead and zinc, and achieves the goals of energy saving, emission reduction, consumption reduction and comprehensive utilization of resources on the whole.

Description

technical field [0001] The invention relates to a mineral processing method, in particular to a method for processing low-grade refractory lead-zinc oxide ore. Background technique [0002] my country is rich in lead-zinc oxide resource reserves. According to statistics, my country's lead resource reserves are 14 million tons, and zinc basic reserves are 43 million tons. However, there are many lean ores and few rich ores, and the distribution is relatively concentrated. Sichuan, Guangxi and Liaoning provinces. The lead-zinc ore resources in Yunnan Province account for 20.55% of the total in my country, and it is an important lead-zinc ore resource base in my country. However, the low-grade refractory lead-zinc oxide ore resources account for a considerable proportion, such as the largest and most famous The Lanping lead-zinc mine in western Yunnan has metal reserves of more than 15 million tons. It is the largest lead-zinc mine in Asia and the fourth largest in the world, bu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B03B7/00B03B1/00
Inventor 李晓阳简胜李明晓朱从杰杨玉珠王少东严小陵杨林张晶阚赛琼
Owner 青海鸿鑫矿业有限公司
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