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Method for firing active lime by using lead-zinc tailings and recovering precious metals

A technology of active lime and precious metals, applied in the direction of improving process efficiency, can solve problems such as soil and water resources pollution

Inactive Publication Date: 2017-01-11
刘清汉 +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to solve the pollution problem of soil and water resources caused by a large amount of stacking of lead-zinc tailings and the heavy metals contained therein

Method used

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  • Method for firing active lime by using lead-zinc tailings and recovering precious metals

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Embodiment 1

[0009] Example 1: The tailings are put into the rotary kiln through the feed port, and the lead and zinc in the flue gas are recovered by extraction.

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Abstract

The present invention relates to an active lime production method, particularly to a method for firing active lime by using lead-zinc tailings and recovering precious metals. A purpose of the present invention is to mainly solve the problems of the stacking of a large number of lead-zinc tailings and the pollution of heavy metals contained in the lead-zinc tailings on soil and water sources. According to the present invention, with the application of the lead-zinc tailings to fire the active lime, the tailings stacking is solved, and a certain added value can be produced; the high content precious metals are recovered during the lime firing process, such that the waste of resources is avoided, and the environment is protected; the process of the method for firing the active lime by using the lead-zinc tailings and recovering the precious metals comprises performing active lime firing through a rotation kiln and recovering heavy metals through flue gas; and the method of the present invention has advantages of complete lead-zinc tailings utilization, effective soil source saving, production cost reducing, excellent mechanical property, no pollution during the production process, and meeting of the environmental protection requirements.

Description

technical field [0001] The invention relates to a production method of active lime, in particular to a method for burning active lime by utilizing lead-zinc tailings and recovering precious metals. Background technique [0002] The distribution of lead-zinc tailings and their smelters in my country is very wide, and the discharge of waste residue is also very large, which requires a large amount of farmland as a storage site, and the harmful leached substances in it will also pollute water sources. Therefore, using waste residue as raw materials and fuels for cement production is the main direction of saving resources and energy. This direction has been recognized by the majority of scientific researchers and cement manufacturers, and the scope of utilization is constantly being actively expanded. [0003] With the increasing demand for lead and zinc resources in social development, lead and zinc minerals are continuously mined and increasingly exhausted. At the same time, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B2/10C22B7/00C22B13/00C22B19/30
CPCY02P10/20
Inventor 刘清汉丁谷华王志云
Owner 刘清汉