Placer gold ore flotation process

With the advancement of science and technology, placer gold ore beneficiation methods have made great progress. Different placer gold mines will use different beneficiation techniques. Ore dressing plants will now widely use a variety of 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 solutions for placer gold mines. This article will mainly introduce the flotation technology, process and required equipment for placer gold mines.

Placer gold ore flotation process

Due to the low gold content in placer gold ores, generally raw ores need to be sorted and then further purified to obtain high-grade concentrates. Therefore, the placer gold ore beneficiation process consists of two parts, namely separation and purification.

In actual production, placer gold ore also contains a large amount of gangue minerals. In order to avoid affecting the concentrate recovery rate, these gangue minerals need to be screened out.

The overall treatment process of placer gold ore includes three steps: screening, sorting and purification. Since the floatability of gold is better than that of sand and gravel, and the gold in placer gold mines is basically in a free state, the flotation method is one of the more cost-effective and efficient methods. When purifying the concentrated placer gold concentrate, the mercury amalgamation method can be used, which can further improve the recovery rate of the concentrate.

After being crushed and screened, the raw placer gold ore enters the ball mill for grinding. The ground products and gangue minerals are basically separated into monomers, and then enter the amalgamation cylinder together with the minerals screened by the screening machine for processing. You can first Recover part of the single gold. The slurry that is not easy to be recycled enters the mixing barrel and is mixed evenly, then enters the flotation machine for one stage of rough separation. The coarse concentrate undergoes two stages of separation to obtain placer gold ore. If the placer gold ore contains iron ore, to avoid waste of resources, the roughing tailings should be subjected to two stages of sweeping and two stages of beneficiation. When concentrating, magnetic separation can be used. After two stages of magnetic separation, iron concentrate and tailings can be obtained. mine.