Cyanide gold extraction in the country is a very common method of gold refining, gold cyanide because of its low cost and high recovery while welcomed by many people, it can be achieved substantially avoids the real estate gold concentrate gold haul all the disadvantages caused, but also help to improve the economic efficiency of enterprises to save costs. But its drawback is that cyanide is a highly toxic drug, a long process, gold extraction slower. In order to accommodate different types of gold-bearing ore, to improve gold recovery and reduce costs, cyanidation gold extraction process innovation.

The initial beneficiation technology is not in place coupled with the high cost of finely ground ore at the time of continuous leaching and dewatering and filtration of large quantities of ore has not yet developed. Therefore, the early development of percolation cyanidation leaching method mainly based. Percolation leaching suitable only for coarse ore processing, material requirements do not allow the clay, slime, etc., so before leaching to crushing ore grade is panning process, sludge separation, the crude product in mud dip in the pool is treated with cyanide percolation method. With the improvement of hydrometallurgical equipment, slurry mixing tank, filter, thickener and other constantly developed, in addition to using percolation leaching ore, the product can be separated sludge stirred tank cyanide. With grinding, concentration and filtration technology progress and improve, cyanide leach gold extraction shift from micro fine gold ore, will begin after all the finely ground ore in vigorously stirred tank leaching. This method will be called all "slime cyanidation" method. It has a high recovery rate, gold leaching speed, short cycle of gold, etc., and therefore spread rapidly use.

Stirred cyanidation of gold cyanidation early using bubbling air oxidation of gold, and later with the gold extraction and the people of the scientific importance of oxygen in the leaching of understanding, as well as oxygen-rich leach liquid oxidant leaching and other auxiliary aids dip processes have emerged, such as hydrogen peroxide or potassium permanganate aid leaching, ammonia cyanide leaching aids, temperature and pressure leaching and help lead nitrate leaching and other aid.