Photoelectric separation technology contributes to the risk management of tailings

At the beginning of November, the State Administration of Mine Safety issued a notice on the overall plan for the management of hidden risks in tailings reservoirs, in view of the risk hidden trouble treatment of the tailing pond, the paper puts forward the principle of organizing and implementing the measures according to local conditions, comprehensive measures, giving prominence to the key points and implementing them step by step, closing the pond and canceling the number, eliminating the risks, carrying out the responsibility, strengthening the management, considering as a whole and advancing comprehensively, according to the level of risk, carry out risk management of the tailing pond in batches and years, and strive to reach the 2026 level, about 200"Overhead depots", 700 depots with no main body of production and operation, and long-term defunct and high-risk hidden danger tailings depots have been completed nationwide.

According to incomplete statistics, at present our country tailings and waste rock pile stock situation, non-metal mines (except coal mining) every year about 1 billion tons of waste rock, accumulated more than 10 billion tons; 

Every year, about 3 billion tons of waste rock are added to the metal mines, and the accumulative stock of industrial solid waste such as waste rock and tailings has reached more than 70 billion tons, and is increasing continuously. If the solid waste from mines can not be discharged and stored scientifically, it will destroy woodland, occupy land, pollute water and environment, and even cause serious safety accidents.

At present, in view of tailings and waste rock, the generation and utilization of tailings and waste rock can be reduced as much as possible in the production link by means of open source and throttling, existing tailings and waste rock through how from can be used to achieve utilization.

Utilization of tailings

It is mainly to enhance the recovery of high-value components in the tailings, and to enhance the economic benefits of the tailings.

1) the tailings are separated by photoelectric separation equipment. On the premise of increasing the comprehensive utilization ratio of the tailings greatly, the tailings are enriched for metal ores to reach the economic mining grade. The non-metallic ores are separated by equipment, and the waste rock is pre-cast to separate the non-metallic ores which have economic value.

(2) to strengthen the vegetation coverage and management of the mine land, and to reduce the environmental damage and impact by means of reclamation and Afforestation.

The use of waste rock

1) in the waste rock, there are also some metal ores with high value, which have high recycling value, and the grade is often higher than the corresponding primary ore grade, such as gold enrichment and recovery by means of chemical mixed flotation, sulfide concentrate grinding, cyanide leaching, photoelectric separation, etc. .

2) it can backfill the mine through waste rock and use it as mine filling material.

In a word, in view of the treatment of tailing pond and the production of tailing, the Economic Benefit is the guide, and the introduction and use of new technology is the guidance. It can reduce the difficulty and cost of tailings reservoir treatment, enhance the comprehensive utilization value of the mine, reduce the long-term impact on the environment, and save a lot of tailings treatment cost.

X-ray intelligent sorting machine

Hefei Mingde opto-electronic technology co. , Ltd. is a national high-tech enterprise dedicated to intelligent sorting technology and X-ray integrated solutions. The company has always focused on the field of ore separation, research and production of ore color separators, artificial intelligence separators, x-ray intelligent separators, can be applied to nearly 100 kinds of metal, non-metallic ore separation applications. Its photoelectric separation technology is not only the innovation of mineral processing technology, but also has a far-reaching influence on the whole industry and mining link, such as mine, mine, tailing pond and so on.

Value and advantages of photoelectric sorting

Through physical separation, using the difference of ore surface characteristics or internal density difference for separation. Compared with the traditional flotation, grinding and separation of tailings into a slurry-like, difficult to deal with, deep environmental damage, photoelectric separation of materials specifications of 0.3 cm or more, the waste tailings after separation can be directly used as backfill and building materials, which reduces the difficulty of tailings treatment, improves the economic value of the mine and indirectly prolongs the service life of the mine. At the same time in line with the policy trend of mining, greatly reducing the production of tailings.