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Selecting-smelting method for processing complex hard-washing low ore grade pulmbous sulfide zincium mine

A lead-zinc sulfide, low-grade technology, applied in the field of metallurgy, to achieve the effects of low production cost, favorable flue gas emission, and high recovery rate of lead and zinc

Inactive Publication Date: 2008-08-20
YUNNAN METALLURGICAL GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention overcomes the deficiencies and shortcomings of the existing and traditional processes, and provides a combined dressing-smelting method for complex and difficult-to-select low-grade lead-zinc sulfide ores with high recovery rate, low cost, simple process, and environmental protection.

Method used

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  • Selecting-smelting method for processing complex hard-washing low ore grade pulmbous sulfide zincium mine
  • Selecting-smelting method for processing complex hard-washing low ore grade pulmbous sulfide zincium mine

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] Example 1: Use complex and difficult-to-select low-grade lead-zinc sulfide ore; the raw ore contains 3% lead and 2% zinc; the lead oxidation rate is 19.1%, and the zinc oxidation rate is 21.74%. The flotation process is adopted to obtain the lead-zinc mixed coarse concentrate, and the lead-zinc mixed coarse concentrate is separated by gravity separation; part of the lead concentrate and mixed lead-zinc sulfide concentrate are obtained; the lead concentrate contains 40% lead and 0.1% zinc ; Mixed lead-zinc sulfide concentrate contains 5% lead and 15% zinc.

[0014] The mixed lead-zinc sulfide concentrate is finely ground, the grinding particle size is -0.043mm, which is 70%; the slurry is adjusted with a solution containing sulfuric acid of 80g / L; it is added to the autoclave, the temperature is controlled at 150℃, the pressure is 1.1Mpa, and it is carried out directly Oxygen gas acid leaching; the leaching rate of zinc in the leaching process is 95%; after acid leaching, th...

Embodiment 2

[0015] Example 2: Use complex and difficult to select low-grade lead-zinc sulfide ore; the raw ore contains 10% lead and 10% zinc; the lead oxidation rate is 10.1%, and the zinc oxidation rate is 13.74%. The flotation process is adopted to obtain the lead-zinc mixed coarse concentrate, and the lead-zinc mixed coarse concentrate is separated by gravity separation; part of the lead concentrate and mixed lead-zinc sulfide concentrate is obtained; the lead concentrate contains 80% lead and 2% zinc ; Mixed lead-zinc sulfide concentrate contains 30% lead and 50% zinc.

[0016] The mixed lead-zinc sulfide concentrate is finely ground, the grinding particle size is -0.043mm, which is 100%; the slurry is adjusted with a solution containing sulfuric acid of 110g / L; it is added to the autoclave, the temperature is controlled to 160℃, the pressure is 1.4Mpa, and it is carried out directly Oxygen gas acid leaching, the leaching rate of zinc in the leaching process is 97%; after acid leaching, ...

Embodiment 3

[0017] Example 3: Use complex and difficult-to-select low-grade lead-zinc sulfide ore; the raw ore contains 5% lead and 4% zinc; the lead oxidation rate is 5.42%, and the zinc oxidation rate is 10.57%. The flotation process is adopted to obtain the lead-zinc mixed crude concentrate, and the lead-zinc mixed crude concentrate is separated by gravity separation; part of the lead concentrate and mixed lead-zinc sulfide concentrate are obtained; the lead concentrate contains 50% lead and 0.5% zinc ; Mixed lead-zinc sulfide concentrate contains 20% lead and 24% zinc.

[0018] The mixed lead-zinc sulfide concentrate is finely ground, the grinding particle size is -0.043mm, which is 80%; the slurry is adjusted with a solution containing 100g / L sulfuric acid; it is added to the autoclave, the temperature is controlled at 155℃, the pressure is 1.3Mpa, and it is carried out directly Oxygen gas acid leaching, the leaching rate of zinc in the leaching process is 96%; after acid leaching, the l...

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Abstract

The invention relates to a method for treatment of dressing and smelting low-grade lead-zinc sulphur ore with complex dressing and pertains to the filed of metallurgy. The specific steps of the method comprise that the low-grade lead-zinc sulphur ore with complex dressing is selected, the lead-zinc crude mixed concentrate is obtained by adopting a flotation technique and is then selected by adopting a gravity dressing technique so as to obtain part of lead concentrate and lead-zinc sulphur mixed concentrate; the lead-zinc sulphur mixed concentrate is added with acid to mix slurry after being treated with fine grinding and then done with acid pickling in a high-pressure kettle with high temperature and high pressure and oxygen and then the solid-liquid separation is carried out; leaching solution is used for producing zinc metal by the conventional technique of zinc hydrometallurgy, while leaching slag is used for recycling lead and silver metal with the conventional pyrometallurgical technique of lead smelting. The method of the invention adopts less species of additive medicine and dosage thereof and has higher recovery rate of lead and zinc products and lower production cost; meanwhile, tail water can be directly recycled with benefit for environmental protection. In addition, the smelting process of the method is characterized by shorter process, lower production cost and no smoke emission benefiting environmental protection.

Description

Technical field [0001] The invention belongs to the field of metallurgy, and specifically relates to a combined method for processing complex and difficult-to-select low-grade lead-zinc sulfide ore beneficiation-smelting. Background technique [0002] China is rich in lead and zinc resources. With continuous mining, the easy-to-mine and easy-to-treat ores are decreasing. There are relatively more complex and difficult to select low-grade lead-zinc sulfide ore. For this type of ore beneficiation, the traditional lead first and then zinc priority flotation process is adopted. Because the floatability of lead-zinc ore is similar, it is necessary to add zinc inhibitors when selecting lead, usually zinc sulfate, sodium sulfite (or sodium carbonate) are used as Inhibitor of zinc, and the collector chooses acetonitrile or butylamine black medicine with weaker collecting ability; when selecting zinc, copper sulfate is used to activate zinc before sorting. There are many kinds of chemical...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B1/00C22B3/04B03B7/00B03B5/04B03D1/00
CPCY02P10/20
Inventor 王吉坤董英张汉平俞德庆蒋绍平嵇晓沧闫江峰张红耀
Owner YUNNAN METALLURGICAL GROUP
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