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Method for separating components such as iron, zinc and silicon dioxide from lead and zinc smelting water quenching slag

A technology of silica and water-quenched slag, which is applied in the direction of silica, silicon oxide, iron oxide, etc., to achieve the effect of recycling and solving difficult disposal

Inactive Publication Date: 2019-11-08
XIANGTAN UNIV
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Problems solved by technology

[0003] The purpose of this invention is to provide a comprehensive technology for separating iron, zinc, silicon dioxide and other components from the water-quenched slag of lead-zinc smelting, which solves the problem of recycling and processing the water-quenched slag produced by the zinc-lead smelting industry

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  • Method for separating components such as iron, zinc and silicon dioxide from lead and zinc smelting water quenching slag

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Embodiment Construction

[0016] Below in conjunction with accompanying drawing, the present invention is described in further detail by embodiment:

[0017] The method for separating iron, zinc, silicon dioxide and other components from the water-quenched slag of lead-zinc smelting is characterized in that: it is carried out according to the following steps:

[0018] The water-quenched slag is transported to the batching bin through tools, and then sent to the agitator through the screw scale and conveying machinery, and the sulfuric acid is transported into the agitator at the same time;

[0019] After mixing evenly, measure the acidity of the mixed solution. After reaching the expected acidity, the mixed solution is sent to the filter to separate the filtrate and filter residue; , washed with water, and then the silica gel is transported to a drying tower to obtain silica;

[0020] The filter residue is transported to the reactor, and nitric acid is transported to the reactor at the same time. Afte...

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Abstract

The invention discloses a method for separating components such as iron, zinc and silicon dioxide from lead and zinc smelting water quenching slag. The method comprises the steps that the water quenching slag and sulfuric acid are simultaneously delivered to a stirrer through a tool; after even mixing is conducted, the acidity is measured, after the expected acidity is reached, mixed liquor is conveyed to a filter, and filtrate and filter residue are separated; the filtrate is delivered into a liquid accumulator, after natural gelling is achieved, acid pickling, EDTA and water washing are sequentially conducted, then silica gel is delivered to a drying tower, and silicon dioxide is obtained; and the filter residue and nitric acid are delivered to a reactor, after full reaction is conducted, sodium hydroxide is added, a mixed solution is delivered into a neutralization tank, the pH value is adjusted to be about 3.2 and 10, then ferric hydroxide slurry and zinc hydroxide slurry are sequentially obtained, the ferric hydroxide slurry and the zinc hydroxide slurry are respectively delivered to the drying tower through a delivery pump, and thus iron trioxide and zinc oxide are obtained.According to the method, the water quenching slag resources are effectively recovered, comprehensive utilization of water quenching slag recovery enterprises is achieved, and the problem that water quenching slag is difficult to treat in the industry is solved.

Description

technical field [0001] The invention relates to a method for separating iron, zinc, silicon dioxide and other components from water-quenched slag of lead-zinc smelting. . Background technique [0002] In the comprehensive utilization process of separating iron, zinc, silicon dioxide and other components from the water-quenched slag of lead-zinc smelting, the water-quenched slag is ground into small particles for subsequent full reaction. The water-quenched slag is The waste slag produced by zinc-lead smelting is large and difficult to handle. In this process, relatively low-cost acid and EDTA sodium salt are used to recycle iron, zinc, and silicon dioxide in water quenching slag, realizing the reuse of water quenching slag, and solving a large amount of water quenching produced by zinc-lead smelting The problem that the slag cannot be dealt with effectively reduces the recycling cost and maximizes the economy. Contents of the invention [0003] The purpose of the presen...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B33/16C01G49/06C01G9/02C22B7/04C22B19/30C22B19/34
CPCC01B33/16C01G9/02C01G49/06C22B7/007C22B7/04C22B19/30C22B19/34Y02P10/20
Inventor 曹靖于俊英胡颖兰天齐
Owner XIANGTAN UNIV
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