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Process for recovering valuable metals from zinc-containing slag

A valuable metal, zinc slag technology, applied in the direction of improving process efficiency, can solve the problems of high content of valuable metals in waste slag, low operation rate, small processing capacity, etc. Effect of valence metal content reduction

Active Publication Date: 2012-02-22
CHINA ENFI ENGINEERING CORPORATION +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

As a traditional zinc smelting slag treatment process, the rotary kiln volatilization method has obvious disadvantages: low operating rate, short kiln lining life, high comprehensive energy consumption, small processing capacity, large investment, large coke consumption, tailings containing Zn, C advanced
However, the melting and redox of the above process are carried out in one reaction vessel, and continuous operation cannot be realized, so the operation rate is low, the amount of slag treatment is limited, and the content of valuable metals in the waste slag is still high

Method used

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  • Process for recovering valuable metals from zinc-containing slag
  • Process for recovering valuable metals from zinc-containing slag
  • Process for recovering valuable metals from zinc-containing slag

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Embodiment Construction

[0027] Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary only for explaining the present invention and should not be construed as limiting the present invention.

[0028] In the description of the present invention, the orientations or positional relationships indicated by the terms "above", "below", "side", "top", "bottom" etc. are based on the orientations or positional relationships shown in the drawings, and are only for convenience The invention is described without requiring that the invention must be constructed and operated in a particular orientation, and thus should not be construed as limiting the invention.

[0029] In addition, in the description of the present invention, although the ...

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Abstract

The invention discloses a process for recovering valuable metal from residues containing zinc, comprising the following steps of: adding the residues containing the zinc to a melting furnace; spraying a gas containing oxygen and coal dust into a hearth of the melting furnace from the top and the side part of the melting furnace; discharging molten slag inside the melting furnace into a fuming furnace; spraying the gas containing the oxygen and the coal dust into the molten slag inside the fuming furnace; introducing the gas containing the oxygen above the molten slag inside the fuming furnace; collecting the dust of fumes inside the melting furnace and the fuming furnace; and discharging waste slag inside the fuming furnace. The process recovering the valuable metal from the residues containing the zinc has continuous operation, a large treatment quantity of the residues and high recovery rate of the valuable metal.

Description

technical field [0001] The invention relates to a process for treating zinc-containing slag, in particular to a process for recovering valuable metals from zinc smelting residue. Background technique [0002] Zinc smelting slag is usually rich in valuable metals such as zinc, lead, silver, and antimony, and needs to be recycled. In addition, zinc smelting slag has been included in the "National Hazardous Waste List", and smelting slag containing a large amount of soluble zinc and lead salts belongs to the first class of pollutants and requires harmless treatment. [0003] The traditional treatment of zinc smelting slag basically adopts the rotary kiln volatilization method. For example, Chinese patent application CN1405338A describes a method for treating zinc smelting slag using a rotary kiln. As a traditional zinc smelting slag treatment process, the rotary kiln volatilization method has obvious disadvantages: low operating rate, short kiln lining life, high comprehensive...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B7/04C22B19/30
CPCY02P10/20
Inventor 陆志方李沛兴王建铭许多峰邓兆磊汪友元郝小红张鸿烈邢国华杨斌胡丕成许良张振民曹柯菲陈向强
Owner CHINA ENFI ENGINEERING CORPORATION
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