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With the advancement of science and technology, the placer gold ore beneficiation process has made great progress. Different placer gold mines will use different beneficiation techniques. Concentrators now widely use various beneficiation technologies such as gravity separation, flotation, magnetic separation and electric separation to improve the separation index of fine-grained gold minerals. Flotation separation is one of the commonly used schemes for placer gold ore. This article will mainly introduce the flotation process, process and required equipment for placer gold ore.
Due to the low gold content in placer gold, generally the raw ore needs to be sorted first and then further purified to obtain a high-grade concentrate. Therefore, the placer gold ore beneficiation process includes two major parts, namely separation and purification. In actual production, the original ore of placer gold also contains a large amount of gangue minerals. In order to avoid affecting the recovery rate of the concentrate, these gangue minerals need to be screened out.
The overall treatment process of placer gold includes three steps of screening, sorting and purification. Since the floatability of gold is better than that of sand and gravel, and the gold in placer gold is basically in a free state, flotation is one of the more cost-effective methods. The amalgamation method can be used when purifying and enriching placer gold concentrate, which can further improve the recovery rate of the concentrate.
The raw placer gold ore enters the ore grinding after being crushed and screened. The product after the ore grinding and the gangue minerals basically achieve monomer dissociation, and then enters the amalgamation cylinder together with the minerals screened by the sieving machine for processing, and can be recycled first. Some monomer gold. The ore pulp that is not easy to be recovered enters the mixing tank to stir evenly, and then enters the flotation machine for one stage of roughing, and the coarse concentrate is then subjected to two stages of separation to obtain placer gold ore. If the gold placer contains iron ore, to avoid waste of resources, the roughing tailings should be subjected to two stages of sweeping and two stages of selection. During the concentration, magnetic separation can be used. After the two stages of magnetic separation, iron concentrate and tailings can be obtained. mine.
The main features of this process: energy saving, high efficiency, and environmental protection. This technological process adopts the amalgamation cylinder to carry out gold recovery in the first step, so as to improve the recovery rate of gold concentrate. In addition, the amalgam in the amalgamation cartridge can be reused and poses little harm to workers and the surrounding environment. Medium and large concentrators can use this process to process placer gold ore.
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