Problems with gold mines

I. The laws and regulations on the comprehensive utilization of mineral resources are not perfect, and the preferential policies for the comprehensive utilization of mineral resources are not in place. Some low-grade ores rich in mining, rich mining, and comprehensive recycling are associated with useful components, because the recycling profits of these resources are low, even Subsidy for funds is also needed. The amount of tax and fee collection is not in line with quality, which increases the use of cost, and the implementation of comprehensive utilization will affect the economic benefits of the enterprise. Therefore, the enthusiasm of enterprises for comprehensive utilization of resources is not high, and fluctuations in gold prices have even led to the use of wealth to abandon poverty. There is still a lack of relevant laws and regulations regarding the collection and recycling of secondary resources such as mining waste.

II. Loss, waste, and destruction of mineral resources Seriously, most gold mines, especially small ones, are often under construction with very low exploration levels. After the mine is put into production, production, infrastructure and technical reforms are carried out simultaneously. Most small-scale enterprises have low technology and management level in the process of metallurgical mining. In addition, due to poor consideration in the initial mining and selection schemes, they often result in greater resource loss, waste, and destruction. Due to the incomplete process of flotation concentrate demineralization and fine grinding, Lingbao smelter caused a large amount of foam overflow in the gold cyanide leaching tank. Therefore, it was necessary to reduce the aeration rate, the cyanidation leaching rate was only about 90%, and the cyanide slag contained gold. It is still 6-9g/t, and sometimes even far beyond the gold content of the ore in the area.

Third, the development and utilization of tailings resources is not enough, a variety of valuable associated elements have not been fully recycled, low environmental efficiency for gold mines, the current gold mine tailings grade in the majority are above 0.5g/t; some up to 4g Above /t, the tailings also contain Cu, Pb, Zn, S, Fe, Ag, Sb, W, etc. Tailings re-election is an effective way to increase the recovery level of gold and its co-associated elements. In China's existing 1 billion tonne gold ore tailings, there are as many as 300-400 tons of available gold resources. In addition, there are 25 tons of gold continue to be lost to the tailings in Yanjin Mine each year, and the gold grade of the tailings is as high as 0.35g/t. In Jiapigou Gold Mine, Jilin Province, the tailings inventory in the old mining area is about 300,000 tons, the gold content of the tailings is 1.0-1.5g/t, and the gold content of the tailings in the new tailings deposit is 1.4-0.68g/t. It is estimated that the tailings in the old and new tailings mines have a total of 16 tons of gold reserves, 280 tons of copper, 2 tons of silver, and 500 tons of lead.

Many gold mines have not yet been comprehensively utilized, but tailings have been piled up. For example, the old Laoshan gold ore contains copper and cobalt, neither of which is recovered; in the Shanggong gold mine in Henan, the ore contains silver, thorium and silver, and the silver is recovered by flotation in the form of silver content. There is no recovery measure, but Tailings Reactor; Hubei Jilongshan is a polymetallic symbiotic orebody, containing copper, silver, lead, zinc, manganese. Currently, only the first three elements are recovered. The latter three elements have not yet been worked due to high recovery costs. There are also many small and medium sized mines, and they are associated with each other. * They are not recycled at all, and are directly discharged, which causes great pollution to the environment. The techniques often used for tailings recovery include re-election, flotation, and cyanidation. Although the recovery of gold from tailings has yielded considerable benefits, at present, it is precisely because of the focus only on the recovery of gold that exists in tailings. The recovery rate of other associated metal elements is generally low, non-metallic elements are basically not recovered, causing secondary waste of resources. The factors that affect the recovery of co-associated elements are roughly the following two aspects: First, the economic and technical conditions of the mine itself are limited, and it is impossible to carry out recycling; second, technical conditions are already in place, but the economic benefits of recycling are poor, and the enterprise has no enthusiasm.

Fourth, science and technology investment and personnel training is not enough attention At present, China's gold mining comprehensive utilization of scientific research is still very weak, the comprehensive use of mineral resources, the depth and breadth of the study is also not enough. On the one hand, due to the decentralization of the industrial sector, the scientific and research forces of the mines are not concentrated and the instruments, equipment, and equipment are backward. On the other hand, the basic research of the comprehensive utilization of mineral resources is seriously insufficient. In the deployment of geological prospecting work, there was no simultaneous research and deployment of integrated evaluation and comprehensive utilization research. The conversion rate of existing scientific research results is low. In short, at present, China's gold production enterprises have not reached a proper level of understanding of the comprehensive utilization of difficult-to-handle gold resources, especially their importance and urgency, and they have not yet properly handled resources, environment, and benefits. Coordinate the development relationship.