Tailings sand is the residue formed by impurities and waste left after useful minerals have been extracted from the mine. The composition of tailings sand depends on the variety and quality of the ore mined in the mine, the chemicals used in refining and the process method.
The tailings sand is rich in mineral particles and fine-grained earth, mainly silica, iron ore, bauxite, manganese ore, tungsten ore, tin ore, copper ore, zinc ore, etc. Besides, there may be some harmful chemical substances such as heavy metals, radioactive elements and chemical residues in the tailings sand.
What steps does the process flow of tailings sand grinding include?
Tailings sand grinding production line
There are usually three steps: coarse crushing, medium and fine crushing, and grinding. Different types and structures of ores have different requirements for sand making process, which need to be adjusted accordingly according to raw materials, emission, output, site, investment budget, etc.
【Jaw Crusher】The large tailings will be processed and turned into medium-sized rocks. If the tailings are too small to be crushed directly into the cone, the jaws are not needed.
【Cone Crusher】The tailing sand after jaw grinding will be made into pebbles smaller than 40mm and depending on the usage, it will be decided whether to send it to the finished product warehouse or use it for producing sand and gravel.
【Euromill】Processes the tail sand to be processed into powder mill, which can be processed into fine powder or micro powder.
The raw material enters the vibrating feeder from the silo, and then the vibrating feeder sends it to the jaw crusher for coarse crushing, and the coarse crushed material enters the impact crusher or cone crusher through the conveyor for fine crushing, and the finely crushed material is sent to the vibrating screen by the conveyor for screening, and the material that does not meet the feed size of the sand making machine will return to the impact crusher or cone crusher for further crushing, and the material that meets the feed size will be sent to the grinding mill for powder processing. The materials that meet the feed size will be sent to the mill for powder processing, and the unqualified materials will be returned to the mill for processing. Finally, the finished powder mill will enter the aggregate bin, and then the finished product conveyor belt will convey it to the finished product pile.
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