Low-carbon environment-friendly resource utilization process and system for high-mercury cyanogen-containing gold separation waste residues

Abstract

The system comprises a rotary kiln and a treatment device communicated with the rotary kiln, the treatment device comprises a raw material storage mechanism, a crushing and screening mechanism and a metering mechanism, and a decomposing furnace of the rotary kiln is arranged on the side face of the metering mechanism; a mercury removal mechanism is embedded in one side of an inner cavity of the decomposing furnace, the side face of the mercury removal mechanism communicates with a metering mechanism, a detection mechanism is arranged on one side of the mercury removal mechanism, the top face of the mercury removal mechanism communicates with an adsorption mechanism, and the bottom of the decomposing furnace communicates with a cement preparation mechanism of a rotary kiln; and the top of the decomposing furnace is communicated with a raw material adding mechanism of the rotary kiln, so that harmless treatment and resource utilization of the hazardous wastes can be realized at the same time. The system can realize the following processes in sequence: high-mercury cyanogen-containing gold separation waste residue storage and crushing and screening pretreatment, mercury removal and mercury product recovery, and decyanation production of cement through collaborative treatment of the rotary kiln.

Description

technical field [0001] The invention relates to the field of harmless resource utilization of hazardous waste, in particular to a low-carbon and environment-friendly resource utilization process and system for high-mercury and cyanide-containing gold selection waste residue. Background technique [0002] The amalgamation method is a typical indigenous metallurgical process that poses a serious threat to the surrounding ecological environment. Due to its low cost and low entry threshold, it was widely adopted by some small workshops in the early part of this century. With the increasing emphasis on environmental protection in our country, this method has been banned; at the same time, the increase in environmental protection supervision and supervision has also basically disappeared small workshops of local alchemy. However, mercury-containing waste residues produced during decades of indigenous metallurgy were piled up at villages, rivers, and fields at random. During the co...

AI Technical Summary

Problems solved by technology

However, because the mercury content in the gold mining waste residue is too high, it does not meet the kiln requirements for co-processing materials in cement kilns. Therefore, mercury removal pretreatment is required before entering the kiln.

Images