Method for extracting arsenic trioxide from roasting dust of arsenic-containing gold concentrate powder

A technology of arsenic trioxide and gold concentrate, applied in chemical instruments and methods, arsenic compounds, inorganic chemistry, etc., can solve the problems of environmental pollution, high loss rate of gold components, waste of natural resources, etc., and achieve controllable process and low loss The effect of less, high purity

Active Publication Date: 2009-04-22
JIANGSU KANGJIE ENVIRONMENT ENG
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Problems solved by technology

Arsenic trioxide, commonly known as "arsenic", is a highly toxic and important chemical raw material. Random discharge will seriously pollute the environment and waste precious natural resources.
[0004] (2) The loss rate of gold components is hi

Method used

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  • Method for extracting arsenic trioxide from roasting dust of arsenic-containing gold concentrate powder

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Embodiment Construction

[0018] The present invention will be further described below in conjunction with the block diagram of the technological process shown in the accompanying drawings, and in conjunction with the embodiments.

[0019] The method for extracting arsenic trioxide from arsenic-containing gold concentrate powder roasting fumes comprises the following steps:

[0020] (1) Fill the arsenic-containing gold concentrate powder according to the capacity of the roasting furnace, raise the temperature in the furnace to 150-200°C and keep it warm for 60-90 minutes, the moisture in the arsenic-containing gold concentrate powder in the furnace becomes water vapor and passes through the fan 7 discharge, the ore dust formed in the furnace enters the cyclone dust collector 2 and the electrostatic precipitator 3 for purification;

[0021] (2) Following the previous procedure, the roasting furnace 1 is heated to 350-400°C and held for 60-90 minutes. Under this temperature condition, the sulfur in the a...

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Abstract

The invention discloses a method for extracting arsenic trioxide from gold concentrate powder roasted fume containing arsenic. The method adopts a staged gradually-heating purification process and a quenching extraction process. The purification process is to volatilize impurities with low melting points in materials under the condition of different temperatures. The purified materials are insulated at a temperature of between 500 and 550 DEG C for more than 150 minutes, so that the arsenic is oxidized into arsenic trioxide gas; the gas is purified through a cyclone dust collector and an electrostatic precipitator in sequence; the purified high-temperature arsenic trioxide gas directly enters a quenching tower of which the temperature is between 120 and 140 DEG C to be crystallized into arsenic trioxide microparticles; and powdery arsenic trioxide collected by a bag arsenic collector is outputted via a scraper conveyor. The method has the advantages that the process procedure is arranged reasonably, controllably and stably, and the rate of extracting the arsenic trioxide from fume is high, and the purity of the extracted arsenic product is high, and the method well solves the problem of arsenic pollution in the gold smelting industry.

Description

technical field [0001] The invention relates to a method for extracting chemical raw materials from smoke generated by precious metal smelting, in particular, the invention relates to a method for extracting arsenic trioxide from smoke dust roasted with arsenic-containing gold concentrate powder. Background technique [0002] Arsenic in nature is often associated with gold concentrate. When gold is refined with arsenic-containing gold concentrate powder, the smoke generated by smelting contains arsenic trioxide. Arsenic trioxide, commonly known as "arsenic", is a highly toxic and important chemical raw material. Random discharge will seriously pollute the environment and waste precious natural resources. How to solve the problem of arsenic trioxide emission in the gold production process has always been a technical problem plaguing the gold smelting industry. At present, in the gold smelting industry, the technology of extracting arsenic trioxide from dust has been used for...

Claims

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Application Information

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IPC IPC(8): C01G28/00
Inventor 王洪林徐仁觉祁树业
Owner JIANGSU KANGJIE ENVIRONMENT ENG
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