The tailings re-selection process is mainly from the perspective of protecting the environment and making full use of resources, re-selection of various metal and non-metal tailings with reuse value, and designing reasonable tailings according to the different properties of each tailing. Mine re-selection and treatment process to fully exploit the value of tailings.
The tailings reselection process is suitable for the reselection of various metal and non-metal tailings, including iron, gold, lead-zinc, copper, fluorite, tungsten, phosphorus, graphite, bauxite tailings, etc.
Precious metal tailings
Gold tailings: Gold tailings are often extracted from old tailings by the full-slime cyanidation + carbon slurry method. For the gold tailings after cyanidation, the tailings are treated by dry heaping, that is, the filtrate is recovered by screening, pressure filtration and other processes. Most of the cyanide in the tailings is removed while the selected water resources are recycled. For the iron element in gold, two methods of magnetic separation and re-selection are also used for classification.
Non-ferrous metal tailings
Lead-zinc tailings: The main components of the tailings after flotation of lead-zinc ore are quartz and sericite. Selecting + flotation and other combined processes to recover valuable elements in lead and zinc tailings.
Copper tailings: If the content of precious metals in copper tailings is high, the separation is easier, and the flotation process is usually used for recovery. In addition to copper, another part of the copper tailings also contains a certain amount of magnetite. For this type of tailings, the acid leaching method is usually used to precipitate copper, and then the magnetite is separated by the magnetic separation process according to the needs.
Tungsten tailings: gravity separation, magnetic separation, flotation and other methods are often used, among which gravity separation is a commonly used separation process for tungsten ore. The re-separation and utilization process of gravity tungsten ore is a roughing process based on centrifugal concentrator (or wet strong magnetic) and a selection process based on shaking table-flotation to fully recover useful minerals in tungsten tailings.
Bauxite tailings: The commonly used beneficiation processes in the treatment of bauxite are flotation and magnetic separation.
Ferrous metal tailings
Iron tailings: The iron tailings discharged from iron ore dressing plants have the characteristics of large quantity, fine particle size, various types, and complex properties. Processes such as magnetic separation, flotation, acid leaching, and flocculation are often used to recover iron from tailings.
Phosphorus tailings: The main gangue minerals of siliceous phosphate ore are quartz siliceous minerals. The floatability of gangue minerals is quite different from that of useful minerals, and the flotation process is usually used for sorting. The main gangue minerals of calcium phosphate rock are calcite and dolomite, and the tailings are floated by reverse flotation method.
Graphite tailings: In the treatment of graphite tailings, the staged grinding and staged separation process is usually used for separation, among which flotation and shaking table separation are commonly used separation processes for graphite separation processes. To comprehensively recover several minerals in graphite tailings, a combination of beneficiation methods is required.
1. According to the ore composition, you can freely choose the matching model.
2. The whole system reduces energy consumption and improves recovery rate.
3. Small footprint, convenient operation and higher beneficiation efficiency.
4. The discharge material can reach the standard concentrate index, which is environmentally friendly and pollution-free.