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High temperature chlorinated gold-bearing flue gas treatment method

A technology for flue gas treatment and high-temperature chlorination, which is applied to chemical instruments and methods, separation methods, and separation of dispersed particles. The effect of improving the recovery rate

Active Publication Date: 2018-12-11
BEIJING MINING & METALLURGICAL TECH GRP CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Matte-making and paving gold are generally suitable for treating materials with high gold content (above 10g / t), and high-temperature chlorination and molten chlorination are widely applicable to materials, but the following problems exist in the flue gas treatment part of these two processes: The recovery rate of gold in the gas is low; the gold in the solution is difficult to precipitate completely; the circulating liquid is easy to crystallize and block the pipeline and equipment, etc.

Method used

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  • High temperature chlorinated gold-bearing flue gas treatment method

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specific Embodiment approach

[0010] High-temperature chlorination gold-containing flue gas treatment method of the present invention, its preferred embodiment is:

[0011] Its processing includes:

[0012] Gold-containing flue gas is discharged after conventional dust removal, flue gas cooling and dry dust removal, high-efficiency washing, flue gas re-cooling, high-efficiency demisting, and high-efficiency desulfurization. After treatment, concentration and crystallization, return to the system for recycling, and the gold-containing solid collected during the treatment process is used for further gold extraction.

[0013] The gold-containing flue gas is high-temperature chlorination or molten chlorination flue gas, the temperature of the flue gas is 350-800°C, and the dust content of the flue gas is 5-20g / Nm 3 , including SO 2 ≤2%, gold, silver, copper, lead and zinc in flue gas mainly exist in the form of chloride.

[0014] The inertial dust removal equipment includes a settling chamber, the settling ...

specific Embodiment

[0027] High-temperature chlorination gold-containing flue gas treatment method, the treatment process is to pass the high-temperature gold-bearing flue gas through inertial dust collection-flue gas cooling and dry dust removal-high-efficiency washing-flue gas re-cooling-high-efficiency demisting-high-efficiency desulfurization-standard emission , The circulating sewage of all levels of towers is filtered, replaced by iron powder, neutralized, concentrated and crystallized, and then returned to the process for recycling.

[0028] The specific operation steps are:

[0029] 1. The high-temperature chlorination gold-containing flue gas passes through the settling chamber to remove the coarse dust. If the gold grade of the dust collected in this part is high, it will be directly sent to the gold extraction process. If the gold grade is low, it will be returned to the raw material.

[0030] 2. The flue gas from the settling chamber enters the quenching tower, and high-pressure water...

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Abstract

The invention discloses a high temperature chlorinated gold-bearing flue gas treatment method. According to the invention, gold-bearing flue gas is in up-to-standard emission after being subjected toinertial type dust removal, flue gas cooling and dry type dust removal, high efficiency washing, flue gas re-cooling, high efficiency defogging, high efficiency desulfuration, circulating sewage liquid of each level of tower returns back to a system for recycling after being subjected to filtration, iron powder replacement, neutralization treatment, concentrated crystallization, gold-bearing solidcollected during the treatment process is subjected to further gold extraction. The gold-bearing flue gas is high temperature chlorinated flue gas or molten chlorinated flue gas, the temperature of the flue gas is 350 to 800 DEG C, the dust content in the flue gas is 5 to 29 g / Nm<3>, the content of SO2 is less then 2%, gold, silver, copper, lead and zinc mainly exist in the form of chloride in the flue gas. The high temperature chlorinated gold-bearing flue gas treatment method has the advantages that the recovery rate of gold is increased while the flue gas is effectively cooled and dusted,the problem of blocking of circulating liquid to equipment and pipelines can be effectively solved, the problem of treatment of gold-bearing flue gas produced by high temperature chlorination or molten chlorination of gold-bearing materials (calcine, cyanided tailings, iron sulfide cinder, primary gold-bearing ore, etc.) is solved.

Description

technical field [0001] The invention relates to a gold-containing chlorination flue gas treatment process in the field of smelting, in particular to a high-temperature chlorination gold-containing flue gas treatment method, which uses high-temperature chlorination and high-temperature molten chlorination fire methods to treat gold concentrates and gold-containing tails High-temperature flue gas produced by smelting slag and gold-bearing materials. Background technique [0002] At present, gold extraction by cyanidation leaching is still the mainstream process for extracting gold, but the tailings treated by this method generally contain more than 2g / t of gold, and the gold cannot be fully recovered. In order to solve this problem, technologies such as matte-making and gold-plating, high-temperature chlorination volatilization, and molten chlorination have been developed in recent years. These technologies can reduce the gold grade in tailings to below 1g / t. Matte-making and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D50/00B01D53/50B01D53/78
CPCB01D50/00B01D53/502
Inventor 常耀超袁朝新黄海辉王为振孙留根靳冉公徐晓辉郭持皓李大江梁东东孙聪余群波
Owner BEIJING MINING & METALLURGICAL TECH GRP CO LTD