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Efficient beneficiation method of pyrite in lead-zinc flotation tailings

A technology for flotation tailings and beneficiation methods, applied in flotation, solid separation and other directions, can solve the problems of high beneficiation cost, high consumption of chemicals, low selected concentration, etc., and achieves wide popularization and application prospects, reduced dosage, and efficient separation. Effect

Inactive Publication Date: 2017-05-31
南京银茂铅锌矿业有限公司
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Problems solved by technology

[0003] At present, the low-concentration + flotation machine process commonly used in the pyrite beneficiation of lead-zinc flotation tailings in my country is directly selected. Not only the beneficiation index of pyrite is low, but also the resource recovery rate is low and the equipment consumes more energy due to the low concentration of the selected iron. High cost of mineral processing, high reagent consumption, high beneficiation cost, serious overflow of flotation, etc.

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  • Efficient beneficiation method of pyrite in lead-zinc flotation tailings

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Embodiment Construction

[0012] A lead-zinc mine is rich in co-associated pyrite resources, which is a typical lead-zinc polymetallic mine. Sulfur flotation machines have many problems such as high energy consumption, high reagent consumption, and frequent overflow of sulfur selection. Moreover, with the demand for sulfur grades in the sulfur iron market, product sales are facing difficulties, and economic benefits have been greatly affected. Traditional sulfur selection technology can no longer meet the requirements. The normal production demand of the market and mines. After carrying out the systematic research on the technology of this project, the results have been put into application one after another and after continuous improvement, the recovery rate of the beneficiation operation of sulfur in the lead-zinc flotation tailings has increased by 11 percentage points; the main grade of sulfur concentrate has increased by 9 percentage points ; The power consumption of sulfur selection is reduced by...

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Abstract

The invention provides an efficient beneficiation method of pyrite in lead-zinc flotation tailings which can significantly reduce the amount of separating pyrite agents and improve the main grade of sulfur concentrate and the operation recovery rate of sulfur. The efficient beneficiation method is that the zinc tailings with the concentration of 20-25% and pH>=12 which is through the process of dressing lead and zinc floatation successively is dehydrated and concentrated to concentrated underflow with the concentration of 50-52%, and the pH of the concentrated underflow is adjusted to 6-7 by the addition of sulfuric acid, then the separating pyrite collecting agent is added, the majority of sulfur is selected into sulfur concentrate with sulfur main grade greater than 49% which directly gets into the product with a flotation column by a quick election, and the remaining sulfur is selected into sulfur concentrate with the sulfur main grade greater than 43% with a flotation machine by a roughwrought and a concentrated scavenging, the total operation recovery rate of the sulfur is above 96%, the main grade of sulfur concentrate reaches 47%.

Description

technical field [0001] The invention relates to a method for selecting sulfur from pyrite in lead-zinc flotation tailings, which is suitable for high-efficiency comprehensive utilization of pyrite in lead-zinc flotation tailings, and suitable for pyrite resources in other non-ferrous metal ores recycling. Background technique [0002] my country's existing lead-zinc ore, copper ore and other non-ferrous metal mines are generally associated with pyrite resources, there are a large number of mines, and pyrite resources are abundant. Pyrite is not only an important basic chemical raw material, but also a source of iron and steel raw materials. The heat generated in the process of producing sulfuric acid from pyrite can also generate electricity, etc., and it is also a thermal energy raw material. [0003] At present, the low-concentration + flotation machine process commonly used in the pyrite beneficiation of lead-zinc flotation tailings in my country is directly selected. ...

Claims

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Application Information

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IPC IPC(8): B03D1/00B03B1/00B03D103/02
CPCB03B1/00B03D1/00B03D2203/02
Inventor 马斌缪建成汤成龙胡继华
Owner 南京银茂铅锌矿业有限公司
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