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Method for treating zinc dipping slag, zinc smelting gypsum slag and blast furnace gas ash

A technology for blast furnace gas ash and zinc leaching slag is applied in the field of processing zinc leaching slag, zinc smelting gypsum slag and blast furnace gas ash, which can solve the problems of low metal volatilization rate, single processing raw materials, etc., so as to reduce the stacking management cost and process. Simple technology, the effect of reducing investment and process

Pending Publication Date: 2022-05-27
云南云铜锌业股份有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] In view of the above-mentioned deficiencies in the prior art, the object of the present invention is to provide a method for processing zinc leaching slag, zinc smelting gypsum slag and blast furnace gas ash, aiming at solving the problem of the volatilization rate of valuable metals in the existing zinc leaching slag rotary kiln volatilization process. Not high, deal with the problem of single raw material

Method used

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  • Method for treating zinc dipping slag, zinc smelting gypsum slag and blast furnace gas ash
  • Method for treating zinc dipping slag, zinc smelting gypsum slag and blast furnace gas ash
  • Method for treating zinc dipping slag, zinc smelting gypsum slag and blast furnace gas ash

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Embodiment 1

[0063] A method for synergistically processing zinc leaching slag, zinc smelting gypsum slag and blast furnace gas ash by a rotary kiln fuming method, comprising the following steps:

[0064] Take the zinc leaching slag and zinc smelting gypsum slag that have been fully filtered by the filter press, and the mass of the gypsum slag is 6% of the quality of the zinc leaching slag. 36% of the mass of the mixed material is mixed with anthracite, and the material is turned back and forth to ensure uniform mixing, and the mixed material mixed with fuel is obtained; In the process of pelletizing and granulating, blast furnace gas ash is evenly added, wherein the added amount of blast furnace gas ash is 45% of the mixture mixed with fuel, and the pelletizing and pelletizing of zinc-dipping slag is completed. The zinc-dipping slag after pelletizing and granulation is uniformly fed from the kiln tail of the rotary kiln, the temperature of the rotary kiln is controlled to 1150℃, the high ...

Embodiment 2

[0066] A method for synergistically processing zinc leaching slag, zinc smelting gypsum slag and blast furnace gas ash by a rotary kiln fuming method, comprising the following steps:

[0067]Take the zinc leaching slag and zinc smelting gypsum slag that have been fully filtered by the filter press, and the quality of the gypsum slag is 7.5% of the quality of the zinc leaching slag. 41% of the mass of the mixed material is mixed with anthracite, and the material is turned back and forth to ensure uniform mixing, and the mixed material mixed with fuel is obtained; In the process of pelletizing and granulating, blast furnace gas ash is evenly added, wherein the added amount of blast furnace gas ash is 35% of the mixture mixed with fuel, and the pelletizing and pelletizing of zinc-dipping slag is completed. The zinc-dipping slag after pelletizing and granulation is uniformly fed from the kiln tail of the rotary kiln, the temperature of the rotary kiln is controlled to 1200℃, the h...

Embodiment 3

[0069] A method for synergistically processing zinc leaching slag, zinc smelting gypsum slag and blast furnace gas ash by a rotary kiln fuming method, comprising the following steps:

[0070] Take the zinc leaching slag and the zinc smelting gypsum slag that have been fully filtered by the filter press, and the mass of the gypsum slag is 9% of the quality of the zinc leaching slag. 46% of the mass of the mixed material is mixed with anthracite, and the material is turned back and forth to ensure the mixing is uniform, so as to obtain the mixed material mixed with the fuel; the mixed material mixed with the fuel is fed into the granulation system, and the roll forming is used for pelletizing. In the process of pelletizing and granulating, blast furnace gas ash is evenly added, wherein the added amount of blast furnace gas ash is 25% of the mixture mixed with fuel, and the pelletizing and pelletizing of zinc-dipping slag is completed. The zinc leaching slag after pelletizing and...

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Abstract

The invention provides a method for treating zinc dipping slag, zinc smelting gypsum slag and blast furnace gas ash, which comprises the following steps: mixing water-containing zinc dipping slag and zinc smelting gypsum slag according to a certain proportion to obtain a mixed material; mixing the mixed material with fuel according to a certain proportion to obtain a mixed material mixed with the fuel; a certain proportion of blast furnace gas dust is mixed into the mixture with the fuel, the mixture with the fuel is pelletized and granulated, and the pelletized and granulated zinc dipping slag is obtained; and the zinc dipping slag obtained after pelletizing and pelletizing is fed into a rotary kiln, fuming treatment is carried out under the preset temperature, the preset standing time and the preset pressure, and smoke dust containing zinc, lead, silver and indium and metallized kiln slag are obtained. The method is short in technological process, low in production cost and high in metal recovery rate, the green pellet strength is enhanced, the fuel consumption is reduced, reduction and resource utilization of the zinc dipping slag, the gypsum slag and the gas ash are achieved, and the method has good application prospects.

Description

technical field [0001] The invention relates to the field of comprehensive utilization of metallurgical solid waste resources, in particular to a method for processing zinc leaching slag, zinc smelting gypsum slag and blast furnace gas ash. Background technique [0002] At present, more than 80% of the zinc in the world is produced by the "roasting-leaching-purification-electrowinning" process. In this process, zinc sulfide concentrate is roasted to obtain zinc calcine, and then through two-stage leaching process of medium acid and high acid, the zinc oxide in the calcine is dissolved, and the remaining slag is called zinc leaching slag. The zinc content in the zinc leaching slag is generally about 20%, mainly in the form of zinc ferrite with stable properties, and some precious metals such as silver, indium and germanium exist; at the same time, the zinc leaching slag has strong acidity, poor stability and high heavy metal content. , has strong corrosiveness and permeabili...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B7/02C22B19/30C22B58/00C22B1/24C22B13/00C22B11/00
CPCC22B7/02C22B7/006C22B19/30C22B1/2406C22B13/045C22B11/044C22B58/00Y02P10/20
Inventor 刘志民刘俊场陈浩谢天鉴曾鹏翟忠标刘建平邹维周中华付维琴邱伟佳牟兴兵张少博王坤刘自虎吴钧姜艳苏腾飞
Owner 云南云铜锌业股份有限公司
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