gold ore flotation process / gold processing plant / gold benefication plant

Gold Processing

Most gold in the United States is produced at above ground surface (open pit) mines. While mining and production methods vary from location to location. The following is a generic description of how gold is mined and produced around the world at modern operations.

Gold Ore Concentrate

Geologists use the latest technology, such as satellite surveys and geochemistry, to locate an ore deposit.Computers are used to design the mine, which requires precise and accurate measurement of the gold ore concentrate deposit. Construction begins following the lengthy process of receiving permits.Samples of ore are examined to determine grade and metallurgical characteristics. Broken rock is marked by type for efficient processing.

Gold Ore Flotation

Free metallic gold can be recovered very effectively by flotation, although more commonly it is recovered together with sulphide minerals, where gold is intimately associated with the sulphides as fine unliberated grains (solid solutions or inclusions), or occurs with barren, hydrophobic sulphides. The most common gold bearing sulphides are pyrite, arsenopyrite and to a lesser extent pyrrhotite.

The flotation of gold from sulphide-free ores containing very low concentrations of free gold is difficult due to the low mass of material reporting to the concentrate and the high density of gold (s.g.19.3). For example 5x10-3% (50 gr/t) Au would be a very high gold ore grade, compared with grades of above 0.5% for Cu, Pb or Zn ores typically treated by flotation. This result in very poor froth stability and decrease recovery and concentrate grade. Despite these factors, close to 100% recovery of free gold has been achieved by flotation under optimized conditions in some applications, with concentration ratios of 30-300 achieved.

Gold Ore Beneficiation

A gold beneficiation process, the process uses two and a half of a closed-circuit crushing, two stage two closed-circuit grinding and flotation and then by selection, selection of its tailings swept away by a rough sorting operations, will be selected tailings and sweep the election together combined ore concentrate regrinding, the high efficiency of this process broken, broken fine-level content and the final product was 81.55%, high crushing capacity, processing capacity per hour is 53. 84 tons, working time is short, and the sorting effect, high-technology index, and the concentrate grade and recovery rates can improve synchronization, high recovery rate targets, increased 3.03%, concentrate grade increased 16.57g/t.