342 / 2022-03-15 16:14:17

Key Technology for Efficient Screening of Moist Mine Solid Waste

moist, mine solid waste, comprehensive utilization, large span non-equilibrium excitation screening, rigid-flexible coupling elastic screening

Clean Processing and Conversion of Energy Resources > 1. Process Intensification of Mineral Separation

For the complex components of moist mine solid waste, the traditional screening method is easy to cause material adhesion and accumulation, uneven loading on the screen surface, resulting in poor overall screening efficiency, which restricts the large-scale comprehensive disposal and utilization of mine solid waste resources. To solve above problems, the following research has been carried out, the segregation and stratification behaviour of the complex granules were elucidated, and the dynamic coupling mechanism of screen body - particles was revealed, then the nonlinear screening probability model of particles was established. A large span non-equilibrium excitation screening method, which increased the transport speed of particles on the screen surface by 5%, was developed. And a rigid-flexible coupling elastic screening method was proposed, where the "hardness-aperture-opening rate" of the screen surface along the material flow direction showed an increasing arrangement, and increasing the service life of the screen surface by 50%, and the screening efficiency is increased by 5%. In addition, the classification-magnetic separation process of gold tailings was proposed to produce tailings sand, dry-mixed mortar and building ceramics. The high-efficiency screening was applied to the classification and dewatering for tailings, which realized the resource utilization of full grain tailings.