What are the common methods for gold extraction from vein gold mines by gravity separation?

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Vein gold ore is a type of gold ore, which is mainly embedded in quartz gravel and exists in the form of fine gold particles. It is a sedimentary metamorphic rock deposit type gold deposit. When beneficiating gold deposits of this type, gravity separation is often used in combination with other processes to beneficiate gold. Gravity separation is rarely used alone to separate vein gold deposits.

When beneficiating minerals, it is often used in grinding and grading circuits, using jigs or spiral chute and shaking tablesCooperate to recover the dissociated coarse-grained single gold in advance to facilitate subsequent flotation or cyanidation operations and obtain qualified gold concentrate. Common gravity separation and gold vein extraction processes include: Gravity separation-cyanide gold extraction process, Gravity separation-flotation gold extraction process, Flotation -Re-select the gold extraction processetc.

1. Gravity separation-cyanide gold extraction process

Gravity separation-cyanide gold extraction process , generally suitable for processing quartz vein gold-containing oxidized ores. The process is: after the raw ore is ground and classified by a ball mill, it first enters the gravity separation operation to obtain the concentrate, and then enters the cyanidation stage to extract gold; another method is that the raw ore directly enters the gravity separation, and the tailings and classified minerals are cyanide-treated separately. Turn into gold.

2. Gravity selection-flotation gold extraction process

Gravity selection-flotation gold extraction process is applicable It is suitable for processing ores treated by single flotation, gold-containing oxidized ores and ores associated with free gold. The process flow is as follows: first use gravity separation method to recover coarse-grained gold in minerals, and then carry out flotation operation on the tailings obtained by gravity separation to obtain fine-grained gold minerals. This combined method can achieve higher gold recovery than a single flotation process.

3. Flotation-gravity gold extraction process

Flotation-gravity gold extraction process Flotation is the main method, and it is mainly suitable for ores where gold and sulfide are closely symbiotic and gold can only be recovered by smelting, or for gold-containing quartz vein ores that are coarsely and unevenly embedded. The process is: In a closed-circuit grinding system, coarse-grained gold is easily enriched in circulating materials or embedded in the ball mill lining plate (or medium ), causing the loss of gold, and the gold particles have great toughness and are not easy to grind during the grinding process. The cyanide leaching process is a diffusion-controlled process. This part of gold dissolves slowly, which can easily lead to incomplete leaching, thus remaining in the cyanide tailings. Therefore, in the grinding process, gravity separation is mostly used to recover this part of coarse gold in advance, which can achieve a higher recovery rate than single flotation.

The above is an introduction to the gravity separation and combined mineral processing method of vein gold ore. In actual mineral processing, a single gravity separation method is most suitable. For the separation of placer gold ores, for vein gold ores, a combined gravity separation process is often used. Attention should be paid to the separation. Try to use stage grinding and stage separation processes, implement the mineral processing principle of early harvest, and timely recovery of coarse materials. Grains of gold.

Gold ore resources are very precious. In order to reasonably select gold ore, the choice of gold ore beneficiation process is very important. You cannot choose blindly. You should consider your own actual situation and gold mine investment return. Considering multiple reasons, the process flow should be selected scientifically and rationally. Therefore, the editor recommends conducting a beneficiation test analysis on the vein gold ore first, so as to design a reasonable gold ore beneficiation method to achieve the ideal return on investment.

Gold ore resources are very precious. In order to select ore more reasonably, the gold ore beneficiation process is crucial. If you want to select gold from gold ore in a more economical and environmentally friendly way, you should first conduct a ore dressing test to comprehensively analyze the properties of the ore and draw the conclusion Scientific mineral processing test reports are used to determine which gold mineral processing technology to use, and the mineral processing plan is determined after comprehensively considering the actual situation of the gold mineral processing plant, investment and other factors to achieve the ideal return on investment.