Multiple roasting gold extracting method for unmanageable arsenic-containing gold concentrate

Abstract

A kind of method to extract gold by time and time burning with aurin mine containing arsenic difficult to deal with, and it belongs to the mineral pretreatment technology field of gold meltallurgy industry. The character of it is as following, (1) blending: Coal powder will be added into ore tailing, which has be extracted gold by secondary burning to cyanate, according to the weight rate 7-10%, and will be uniformly mixed. (2) burning: the material prepared will be delivered into the roasting kiln to burn, the temperature will be controlled at 550-680deg.C, the smoke gas will be drained after be cleaned by dust catching, the burning residue produced will be cyanided.(3) cyaniding : the bullion will be reclaimed from the burning residue according to the routine method to extract gold by cyanating. Coal powder will be added into the ore tailing, which has be extracted gold by secondary burning to cyanide, and they will be burned over again, the ore tailing will be extract bullion by cyanating method after it has been burned, so it can be realized to reclaim bullion production furthest form aurin mine containing arsenic difficult to deal with, and the problem that the reclaim of bullion from aurin mine containing arsenic difficult to deal with is low. It takes advantage of the gold mine fully, and improves the availability of resource, the method of it is easy and feasible, is also economic.

Description

1. Technical field

[0001] The invention relates to a method for extracting gold by multiple roasting of refractory arsenic-containing gold concentrate, and belongs to the technical field of mineral pretreatment technology in the gold metallurgy industry. 2. Background technology

[0002] In gold smelting enterprises, for refractory gold concentrates containing arsenic, carbon, sulfur, etc., the secondary roasting pretreatment is generally used, and the slag is then cyanided. The recovery rate of gold and silver can reach 90% and 75%. As mentioned above, gold extraction tailings generally contain less than 2.0g / t of gold and less than 30g / t of silver. These tailings generally do not continue to recycle valuable elements such as gold and silver, but are directly used as cement additives and iron red raw materials. , Ceramic raw materials, etc. However, there are some refractory gold concentrates containing arsenic, carbon, sulfur, etc. Even if the secondary roasting pretreatm...