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5 types of [gold ore] beneficiation techniques
2023-11-10 Xinhai (163)
2023-11-10 Xinhai (163)
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According to the storage characteristics of gold ore, it can be divided into five types: sulfide-poor gold ore, polysulfide gold ore, gold-bearing polymetallic ore, telluride-bearing gold gold ore, and gold-bearing copper ore. Different types of gold ores have different mineral compositions and ore properties, so the mineral processing processes used are also different.
Most of the sulfide-poor gold ores are quartz vein type. The sulfide mainly exists in the form of pyrite and the content is small. It is often associated with copper, lead, zinc, tungsten and other minerals. The gold in this type of ore is natural gold with relatively small particle size. Large, it is the only recycling object, other elements have no industrial value and are only recycled as by-products. This type of ore is recovered using a relatively simple beneficiation process, and the commonly used methods are flotation and all-sludge cyanidation.
Polysulfide gold ore has a high sulfide content and is mostly found in pyrite and arsenopyrite. The gold grade of this type of ore is relatively low, the gold particle size is relatively small, and it is mostly wrapped in pyrite and arsenopyrite, so The beneficiation process of this type of ore is relatively complicated. Generally, gold and sulfide are separated together by flotation method, and then gold and sulfide are separated by cyanide method.
Gold-bearing polymetallic ores contain 10%-20% sulfide, and are also symbiotic with copper, lead, zinc, silver, antimony and other metals, and these metals have independent recovery value. The particle size variation range of gold in this type of ore is large, the embedded particle size is uneven, and it is closely symbiotic with sulfide and various metal minerals, so the mineral processing process is more complicated. Generally speaking, most of them will choose a joint separation process. The specific process requires Determined based on associated metal minerals and gangue minerals.
The gold minerals in gold telluride-containing gold ores are mainly natural gold, but a considerable part of the gold is also contained in gold telluride. The process is relatively complex, and the flotation method is mainly used for recovery, supplemented by roasting, cyanidation, etc. Craftsmanship.
Gold-bearing copper ores are similar to gold-bearing polymetallic ores, but the grade of gold in this type of ore is lower. It is the main comprehensive recovery element and has a complex symbiotic relationship with copper minerals. Flotation is generally used to obtain copper and gold through mixed flotation. The concentrate is then pyrometallurgically smelted, and gold is recovered during the smelting process.
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