Gold ore roasting tail gas recovery technology

Abstract

The invention discloses a gold ore roasting tail gas recovery technology, which comprises a flue gas dedusting section, a tail gas purification section, a SO2 purification section, and a SO3 conversion and absorption section, wherein the flue gas dedusting section and the SO2 purification section are connected, the SO2 purification section and the SO3 conversion and absorption section are connected, tail gas generated by the SO2 purification section and the SO3 conversion and absorption section is delivered to the tail gas purification section. According to the technology, SO2 can be fast separated and purified, high-concentration sulfuric acid can be fast obtained, the extraction rate of gold in the gold ore can also be improved, and the whole system does not emit a harmful gas.

Description

technical field [0001] The invention relates to the technical field of separation and recovery of sulfur oxides from exhaust gas in common physical or chemical methods or devices, especially a gold mine roasting tail gas recovery process. Background technique [0002] The raw ore of gold contains a large amount of impurities such as arsenic and sulfur. In the existing technology, it needs to be roasted first, and a part of these impurities are first burned and oxidized, and these impurities are removed at high temperature. However, some gold will be taken away during the roasting process. It will be mixed with the dust and taken away. Although the amount is small, it still has the value of recycling due to the high value of gold. Since there are few dust particles, the dust can be directly sent to the gold extraction section without secondary processing. secondary grinding caused by secondary loss, the roasting tail gas contains a large amount of SO 2 and other toxic and ha...

AI Technical Summary

Problems solved by technology

[0002] The raw ore of gold contains a large amount of impurities such as arsenic and sulfur. In the existing technology, it needs to be roasted first, and a part of these impurities are first burned and oxidized, and these impurities are removed at high temperature. However, some gold will be taken away during the roasting process. It will be mixed with the dust and taken away. Although the amount is small, it still has the value of recycling due to the high value of gold. Since there are few dust particles, the dust can be directly sent to the gold extraction section without secondary processing. secondary grinding caused by secondary loss, the roasting tail gas contains a large amount of SO 2 and other toxic and harmful gases, SO 2 It is a necessary raw material for the production of high-concentration sulfuric acid, and the existing technology also uses this method to recover SO 2 , but the existing technology in the purification of SO 2 There is a large SO in the process 2 loss, resulting in unnecessary waste of raw materials and costs

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