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I plant production of gold extraction activated carbon, there are three major categories: coconut shell charcoal, apricot shell activated carbon for gold, gold wooden columnar activated carbon for gold, gold has several big advantages: activated carbon for gold uniform granularity, strong adsorption capacity, high wear resistance strength, suitable for modern gold mine mining gold production, mainly used for heap leaching method or charcoal slurry method to extract gold metallurgy industry in precious metals separation and extraction.
Second, the gold extraction process:
1. The amalgamation method were proposed
Amalgamation method of gold process is a kind of ancient gold, both simple and convenient, and economical, suitable for coarse monomer gold recovery. A lot of gold mines in our country still continue to use this method. With the development of gold production and the progress of science and technology, gold amalgamation method process has been improved and perfected.
Due to increasingly stringent environmental protection requirements, some mines cancelled amalgamated homework, first choose, flotation and cyanidation of gold technology replaced. In gold production, according to the joint to be the ore properties of amalgam and flotation process, the total recovery rate increased by 7.
81% (amalgamation recovery rate was 64.6%), grade of tailings from 0.74 g to 0.32 g/t/t, benefits for 1.58 million yuan. Amalgamation method of gold technology is the key to how to take protective measures to eliminate toxic mercury pollution.
2. The cyanidation leaching gold process
Cyanidation leaching gold technology is the modern main method of extracting gold from ore or concentrate. Cyanidation process include: gold cyanide leaching, leaching pulp washing filtering, liquid cyanide or the cyanide pulp cicc extraction and smelting as well as the basic process of the finished product.
Gold mines in our country existing basic USES two types of gold cyanide plant process flow, a class of continuous countercurrent washing with thickener, and use of zinc dust replacement precipitation recycling gold so-called conventional cyanidation leaching gold process (CCD and CCF method), another kind is no filtering, washing, active carbon adsorption of recovery of gold from cyanide pulp directly without filtering cyaniding carbon slurry process (CIP and CIL method).
Conventional cyanidation leaching gold technology according to the different processing materials and divided into two kinds: one kind is treatment of flotation gold concentrate or amalgamation, tailings cyaniding plant. In this process are mostly large state-owned mines. Hebei gold factory valley; Yang village, henan, liaoning wulong valley; Shandong zhaoyuan, new town, jiaojia, three mountain island gold mine.
Another is argillaceous oxidized ore, using stir all slime cyanidation leaching gold plant. Such as jilin trench; Heilongjiang unity groove; Anhui xinqiao gold and silver ore mines.
3. The gold smelting and recycling
Gold smelting is the last procedure in the production of gold, its product for gold. Smelting with coarse smelting and refining. Pure refining coarse product for alloy (commonly known as gold), China's gold mines have real estate gold is gold, more directly sold to the bank. Gold rich ore block and all kinds of gold concentrate for smelting processing finished gold (commonly known as the content of gold).
, in the 40 years since the founding of the gold smelting and the rapid development of comprehensive recovery, improving continuously the smelting technology and process equipment, smelting cost is reduced, to promote the development of gold production.
4. The cyaniding carbon plasma method
Gold extraction activated carbon Images