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Process for comprehensively utilizing oxygen-sulfur mixed lead-zinc ore

A technology of lead-zinc ore and mixed ore, applied in the field of metallurgy, can solve the problems of low grade of zinc ore, high production cost, low metal recovery rate, etc.

Active Publication Date: 2021-10-26
KUNMING METALLURGY INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the ore contains sulfide, and the characteristics of zinc minerals, such as low grade, deep oxidation, fine particle size, complex structure, severe mudification and coexistence of multiple metals, greatly increase the difficulty of beneficiation
The existing beneficiation process is complicated, the process control is difficult, there are many equipment and facilities, and the tail gas of boiling roasting contains SO 2 Unable to effectively recycle, coal-fired energy consumption is high, metal recovery rate is low, resulting in high production costs
In addition, the existing flotation zinc sulfide or oxygen-sulfur mixed separation technology is carried out under the alkaline condition of the pulp pH value of 8-11. There are many types of flotation reagents, large dosage and high water and electricity consumption. It is difficult to separate, and the grade and metal recovery rate are low. The selected ZnO concentrate cannot be directly acid leached, and must first be volatilized by pyrolysis.

Method used

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  • Process for comprehensively utilizing oxygen-sulfur mixed lead-zinc ore

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] 1. Sulphide ore (grade 8%) and oxygen-sulfur mixed ore (grade 7%, oxidation rate 80%) are blended to obtain mixed ore, and the mass percentage of zinc sulfide in the mixed ore is controlled to 50%, and the mass percentage of zinc oxide is 50% , CaO+MgO2 <25%.

[0051] 2. Crushing and finely grinding the mixed ore to ensure that the mixed ore is ground to -200, accounting for 70%.

[0052] 3. Flotation in the order of galena → sphalerite → pyrite → zinc oxide ore, after flotation, the grade of lead sulfide concentrate is 48%, the recovery rate is 80%, the grade of zinc sulfide concentrate is 52%, the recovery rate is 92% %, iron sulfide concentrate grade 25%, recovery rate 50%; zinc oxide concentrate grade 22%, recovery rate 65%.

[0053] 4. Sizing and acid leaching the zinc oxide concentrate with a grade of 22%: the acid concentration of the sizing liquid is 10g / L, and the liquid-solid ratio is 4:1; acid leaching P 压缩气 / P 调浆液 =2 (gas is compressed air), the stirring ...

Embodiment 2

[0059] 1. Sulfide ore (grade 23%), oxide ore (grade 14%), oxygen-sulfur mixed ore (grade 4%, oxidation rate 68%) are mixed to obtain mixed ore, and the mass percentage of zinc sulfide in the mixed ore is controlled to 60% , the mass percentage of zinc oxide is 40%, CaO+MgO2 <25%.

[0060] 2. Crushing and finely grinding the mixed ore to ensure that the mixed ore is ground to -200, accounting for 80%.

[0061] 3. Flotation in the order of galena → sphalerite → pyrite → zinc oxide ore, after flotation, the grade of lead sulfide concentrate is 49%, the recovery rate is 83%, the grade of zinc sulfide concentrate is 52%, the recovery rate is 93% %, the grade of iron sulfide concentrate is 28%, and the recovery rate is 48%; the grade of zinc oxide concentrate is 21%, and the recovery rate is 67%.

[0062] 4. Sizing and acid leaching the zinc oxide concentrate with a grade of 21%: the acid concentration of the sizing liquid is 10g / L, and the liquid-solid ratio is 4:1; the acid leach...

Embodiment 3

[0068] 1. Sulphide ore (grade 8%) and oxygen-sulfur mixed ore (grade 7%, oxidation rate 80%) are blended to obtain mixed ore, and the mass percentage of zinc sulfide in the mixed ore is controlled to 50%, and the mass percentage of zinc oxide is 50% , CaO+MgO2 <25%.

[0069] 2. Crushing and finely grinding the mixed ore to ensure that the mixed ore is ground to -200, accounting for 85%.

[0070] 3. Flotation in the order of galena → sphalerite → pyrite → zinc oxide ore, the grade of lead sulfide concentrate after flotation is 49%, the recovery rate is 84%, the grade of zinc sulfide concentrate is 52%, the recovery rate is 93% %, the grade of iron sulfide concentrate is 32%, and the recovery rate is 56%; the grade of zinc oxide concentrate is 25%, and the recovery rate is 67%.

[0071] 4. Sizing and acid leaching the zinc oxide concentrate with a grade of 25%: the acid concentration of the sizing liquid is 10g / L, and the liquid-solid ratio is 4:1; acid leaching P 压缩气 / P 调浆液 ...

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Abstract

The invention discloses a process for comprehensively utilizing oxygen-sulfur mixed lead-zinc ore. The process for comprehensively utilizing the oxygen-sulfur mixed lead-zinc ore comprises the steps of ore blending, ore grinding, combined separation, defoaming acid leaching and aftertreatment. According to the process, the oxygen-sulfur mixed lead-zinc ore is developed and utilized through the combined technical route of combined separation, defoaming acid leaching, low-energy curing and magnetic separation, and the method has the characteristics of being maximized in resource, low in production cost, environmentally friendly, high in economic benefit, small in slag amount and the like.

Description

technical field [0001] The invention belongs to the technical field of metallurgy, and in particular relates to a process for comprehensively utilizing oxygen-sulfur mixed lead-zinc ore. Background technique [0002] The world-class super-large Huoshaoyun lead-zinc deposit discovered in the Hotan area of ​​Xinjiang is the largest lead-zinc deposit discovered so far in my country and the second largest non-sulfide zinc (lead) deposit in the world. The proven lead-zinc resource of the ore belt is 23 million tons Above, the potential of lead and zinc resources is predicted to be more than 40 million tons. As the second largest lead-zinc mine in Asia, the Yunnan Lanping lead-zinc mine has a cumulative controlled reserve of 15 million tons of Pb+Zn and a potential economic value of 100 billion yuan. Both deposits have the problem of sulfide and oxide coexistence. A large number of low-grade and refractory oxygen-sulfur mixed lead-zinc ores in the Lanping lead-zinc mine account f...

Claims

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Application Information

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IPC IPC(8): B03B9/00B03B1/00C22B19/20C25C1/16
CPCB03B9/00B03B1/00C22B19/22C25C1/16Y02P10/20
Inventor 施辉献任玖阳和晓才何光深袁野许娜徐庆鑫杨琛罗凤智徐亚飞任婷和秋谷庄晓东张徽
Owner KUNMING METALLURGY INST
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