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Mineral processing method and mineral processing system for improving the recovery rate of refractory zinc concentrate

A beneficiation method and a technology for zinc concentrate are applied in the field of beneficiation methods and systems for efficiently improving the recovery rate of refractory zinc concentrate, and can solve the problems of difficulty in controlling the grade of zinc concentrate, improving zinc recovery rate, and complex composition, and achieve economical Considerable benefits and environmental benefits, improved recovery rates, and cost reduction effects such as chemical consumption

Active Publication Date: 2020-03-20
南京银茂铅锌矿业有限公司
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Problems solved by technology

[0002] At present, there are many lead-zinc mines in my country. The conventional mineral processing process is low concentration + flotation machine process to directly flotation to produce zinc concentrate. For zinc minerals with fine particle size, complex composition and difficult separation, the grade of zinc concentrate is not easy to control , it is very difficult to increase the recovery rate of zinc, and the waste of resources is serious

Method used

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  • Mineral processing method and mineral processing system for improving the recovery rate of refractory zinc concentrate

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Embodiment 1

[0025] The column machine united subsection asynchronous coarse concentrate regrinding method for lead selection includes the following steps:

[0026] A. After grinding the complex polymetallic lead-zinc ore, according to the principle of priority flotation, first flotation lead and then flotation zinc. By concentrating the tailings after lead selection, the concentration of the underflow pulp of the thickener reaches 50- 52%, add lime to the concentrated pulp, and adjust the pH value of the pulp to Lime fineness-200 mesh is greater than 90%, and the free CaO content is greater than 70%. Add CuSO4 as an activator to the slurry for stirring and activation. The amount of CuSO4 is Added to the activated pulp Butyl xanthate as collector, Pine oil is used as a foaming agent, and a quick roughing and two quick selections are completed through a quick separation flotation machine, and the grade of the quick selection zinc concentrate reaches The recovery rate of zinc reaches...

Embodiment 2

[0031]This high-efficiency, energy-saving and environment-friendly zinc concentrate mineral processing system includes a quick separation flotation machine, a rougher flotation column, a rougher flotation machine, a selection flotation column, a selection flotation machine, a sweep flotation machine, a vertical mill machine, cyclone, the concentrate outlet of the fast separation flotation machine is used to collect zinc concentrate, the tailings outlet of the fast separation flotation machine is connected with the pulp inlet of the rougher flotation column, and the rougher flotation column The concentrate outlet is connected to the pulp inlet of the fine selection flotation column, the tailings outlet of the rougher flotation column is connected to the pulp inlet of the rougher flotation machine, and the concentrate outlet of the finer flotation column is used to collect zinc concentrate, The tailings outlet is connected to the inlet of the vertical mill, the concentrate outlet...

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Abstract

The invention discloses an efficient energy-saving and environment-friendly beneficiation method of a zinc concentrate. The method comprises the following steps that A, zinc is separated from an ore pulp with roughing concentration of 50-52%, specifically, the pH value of the ore pulp is adjusted to be 12 or above, and 70% of the easy-to-separate zinc in minerals is recycled through a one-time rough separation two-time fine separation rapid beneficiation process; B, a foam product finely separated by a first flotation machine and a tailing part of a fine flotation column are selected as raw materials of middling regrinding, so that the ratio of the minerals with fineness less than minus 400 meshes in the re-ground ore pulp is 96% or above; and C, tailings of a rough flotation column entera second flotation machine for flotation, and the zinc minerals which are low in flotation speed and are difficult in flotation are recycled by adopting a one-time rough flotation three-time scavenging technological process. The invention further discloses an efficient energy-saving and environment-friendly zinc beneficiation system of the concentrate. A flotation machine rapid separation plus vertical grinding machine fine grinding column separation plus column machine integrated flotation technological process technology is adopted to jointly carry out flotation on the difficult-to-separateminerals, so that efficient recycling of the zinc in complex difficult-to-separate associated ores is realized, the recycling rate of the zinc is improved by 3-5 percent points, and the content of the zinc in zinc tailings is greatly reduced.

Description

technical field [0001] The invention relates to a mineral processing method and system, in particular to a mineral processing method and system for efficiently improving the recovery rate of refractory zinc concentrate. Background technique [0002] At present, there are many lead-zinc mines in my country. The conventional mineral processing process is low concentration + flotation machine process to directly flotation to produce zinc concentrate. For zinc minerals with fine particle size, complex composition and difficult separation, the grade of zinc concentrate is not easy to control , It is very difficult to improve the recovery rate of zinc, and the waste of resources is serious. [0003] The technology of the present invention adopts the condition of high-concentration ore pulp to carry out flash separation on easy-floating minerals, and recycle and sort refractory minerals through the combination of middle ore regrinding and column machine. The overall integrated flota...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B03B9/00
CPCB03B9/00
Inventor 马斌缪建成范寻陈如凤
Owner 南京银茂铅锌矿业有限公司
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