Placer gold is an important ore resource for gold beneficiation in the concentrator. Every year, various ways such as gold dredgers are used to excavate placer gold, with an annual excavation volume of more than 70 million cubic meters. However, the amount of tailings discharged after the beneficiation plant equipped with gold dredgers is also quite large. These tailings contain a lot of useful substances, such as magnetite, hematite, ilmenite and garnet, which can be used for recycling.
The current situation and problems of mine tailings, the grade of most mine resources is low, and a large amount of tailings are discharged in the beneficiation process. With the improvement of the utilization of mineral resources, the exploitable grade of ore is correspondingly reduced, and the discharge of tailings is also increasing. Tailings discharge is quite large, and it is increasing at the rate of hundreds of millions of tons every year. The comprehensive utilization rate of tailings is low, and a large number of tailings can only be stacked in tailings pond or some natural sites, which inevitably brings many problems.
Tailings seriously pollute the surrounding environment, Some beneficiation processes need to add some reagents, and a certain amount of reagents will remain in the tailings. For example, cyanide used in gold dressing is a highly toxic agent. Xanthate, black medicine and phenolic compounds commonly used in ore dressing emit an unpleasant and special smell in the water, which is very harmful to humans and animals. There are also some heavy metal elements originally existing in the ore, which exist in tailings water due to the action of chemical agents. These tailings water flows into the ground and mixes with the ground water, which is also harmful to human body.
The importance of comprehensive utilization and treatment of tailings for improving economic and social benefits and improving the ecological environment is introduced. The methods of comprehensive utilization and treatment of tailings are introduced, and some suggestions for its work are put forward. Mineral resources play a very important role in the process of economic development. Mineral resources are non renewable natural resources. In order to improve the utilization rate of mineral resources, extend the service life and protect the ecological environment on which human beings depend, people pay more and more attention to the comprehensive utilization and treatment of tailings.
With the improvement of beneficiation technology and the increasing tension of mineral resources, tailings has become a secondary resource for people to develop and utilize. Those with developed industry have taken the development and utilization of mining waste as a new goal of mine development, and the degree of comprehensive utilization and treatment of tailings as a symbol to measure the level of science and technology and economic development. We research in this area started late, but due to the needs of the situation, people increasingly realize that the comprehensive utilization and treatment of tailings is a necessary measure to improve the utilization rate of mineral resources and maintain the sustainable development of mining industry.
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