A method for decarburization of carbon-containing gold ore by raising material, adjusting wind, supplementing heat, roasting

Abstract

The invention discloses a method for decarbonizing carbon-containing gold mines by raising materials, adjusting wind, supplementing heat, and roasting. Roasting facilities. The present invention installs a lifting plate in the roasting rotary kiln, and adjusts the temperature (650°C-850°C) and atmosphere (O2≥20%) in the roasting facility by adjusting the air supply and supplementary heat in the roasting facility. The roasting process is ensured by adjusting the roasting time (150min-240min). Compared with the calcined sand produced by other carbon-containing gold ore roasting processes that do not use raising materials to regulate air and supplement heat, the cyanidation leaching rate of gold can be greatly improved.

Description

technical field [0001] The invention belongs to the technical field of decarburization production of carbon-containing gold ore, and in particular relates to a method for decarbonizing carbon-containing gold ore by raising material, adjusting air, supplementing heat, roasting and decarbonizing. Background technique [0002] The cyanidation leaching of gold is a gold extraction technology widely used at present. Carbon-containing gold ore has an interference effect in the cyanide leaching process of gold, which seriously affects the leaching rate of gold cyanide leaching. Decarburization roasting must be carried out before chemical leaching. The purpose of gold ore roasting is to remove harmful elements in the gold smelting process, including sulfur, arsenic, etc. in addition to carbon. At present, the industrialized gold ore roasting processes mainly include: rotary kiln roasting, flash furnace roasting, fluidized fluidized furnace roasting, etc. The industrialization of th...

AI Technical Summary

Problems solved by technology

The project has been put into operation since the beginning of 2013. Since the designed decarbonization process system adopts traditional rotary kiln roasting, it cannot effectively adjust the temperature and atmosphere in the kiln, and it is difficult to ensure that the gold ore materials in the kiln are in full contact with the air flow, resulting in the roasting process. The effect is unsatisfactory. The gold leaching rate of the gold calcined sand produced by the roasting of carbon-bearing gold ores is not ideal in the process of cyanidation leaching. Therefore, it is imperative to innovate the decarbonization roasting process for carbon-bearing gold ores.

[0003] However, in the process of realizing the industrialization of carbon-containing gold ore decarbonization and roasting rotary kiln, the applicant found that the operation of adjusting air or supplementing heat alone, or using lifting material alone, or a combination of two operations cannot meet the production requirements

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