Arsenic removal process containing post-combustion technology

A process method and post-combustion technology, applied in the direction of process efficiency improvement, etc., can solve problems such as production interruption, insufficient combustion of roasting flue gas, and process blockage

Inactive Publication Date: 2012-07-11
长春黄金设计院有限公司
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Problems solved by technology

[0005] The purpose of the present invention is to provide a kind of arsenic-removing process method containing post-combustion technology, which solves the problem of insufficient combustion of one-stage roasting flue gas in the cu

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  • Arsenic removal process containing post-combustion technology
  • Arsenic removal process containing post-combustion technology

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Embodiment Construction

[0066] as attached figure 1 Shown is the process flow diagram of the present invention, as can be seen from the figure, the gold concentrate 1 is subjected to pulping 11, one-stage roasting 12, two-stage roasting 13, calcined sand 14, and finally enters the hydrometallurgical system 15; The flue gas 21 produced by roasting 12 goes through the first-stage cyclone dust collector 22 and the second-stage cyclone dust collector 23, and the smoke dust 20 produced is incorporated into the post-roasting system. The flue gas of dust collector 31 mixes, and continues to enter spray cooling tower 25, electrostatic precipitator 26, quenching tower 27, bag arsenic collector 28 and sulfuric acid system 29; Wherein, cyclone dust collector 31 devices, spray cooling tower 25 and electric The soot 20 collected by the dust collector 26 is incorporated into the roasting system; wherein, the cloth belt of the bag filter collects As 2 O 3 .

[0067] The present invention is applied to a gold...

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Abstract

The invention relates to an arsenic removal process containing a post-combustion technology and belongs to the technical field of a gold and silver extraction method for precious metal smelting. The arsenic removal process comprises the following steps of: treating gold concentrate containing arsenic by adopting a two-stage roasting process, removing the arsenic as well as sulphur and changing an ore structure, generating porous roasted ore to facilitate next cyaniding operation and improve the leaching rate of gold, and recovering valuable elements in the concentrate; through controlling the air quantity, removing the arsenic and the sulphur in the first-stage roasting under the anoxic roasting atmosphere, carrying out sulfatizing roasting in the second-stage roasting under the oxygen atmosphere; and after flue gas generated by roasting is subjected to arsenic removal, producing sulfuric acid and generating the arsenic into thick white arsenic for sales. The arsenic removal process has the beneficial effects that a traditional process is improved, a post-combustion process is increased on the basis of the traditional process, the problems of initial sulfur condensation and non-arsenic trioxide (As2S3) compound deposition caused by incomplete combustion of roasted flue gas are solved, and the effects of smooth production process and advanced process index are achieved.

Description

technical field [0001] The invention belongs to the technical field of gold and silver extraction methods for precious metal smelting, and relates to a method for removing arsenic from high-arsenic complex gold concentrates, in particular to a method for removing arsenic with post-combustion technology. Background technique [0002] Since the 1980s, with the rapid development of my country's gold industry, easily-disposable gold ore resources have gradually decreased, and refractory gold ore resources are in urgent need of development, especially for the development of arsenic, carbon, antimony and fine-grained disseminated gold ores Utilization is imminent. Our country is relatively rich in refractory gold ore resources. The gold concentrate treated by this invention is a high-arsenic and high-sulfur gold ore flotation concentrate. It is a refractory gold concentrate. When the pretreatment process is removed or the removal is not complete, the gold leaching rate is extremel...

Claims

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Application Information

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IPC IPC(8): C22B1/02C22B11/00
CPCY02P10/20
Inventor 薛树斌蹇令兰王金生李卫东张力纪强张焘侯金刚巨永辉唐淑梅王军李亚宾王大明张璐武鑫卜繁刚赵磊王晓冬王晓民王静荣王艳慧张基娟
Owner 长春黄金设计院有限公司
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