The flotation operation is one of the ore beneficiation ways that are widely used and the flotation machine has a wide application range. With the industrial development and more and more mineral exploitation, the number of the ores with low grade, fine grain size, complex mineral composition gradually increase, thus forcing the sorting of colored copper and iron coal and other minerals to adopt the flotation operation. But the flotation machine also has a range of particle size and if the particle size is too small, it cannot use the flotation machine for the flotation. Flotation machine is based on the development of mining machinery and continues to improve to meet the needs of users. The design and production of the flotation machine is based on the needs of the users to improve mineral processing efficiency. The following is the ways to improve the flotation index of the fine grains.
In the denser pulp, the pulp has large viscosity so that the interference that the particles stand for the sedimentation is large. The settling velocity slows down so that some coarse mineral particles will be brought out the overflow weir by the slurry that is in horizontal flow and the particles cannot sink, which will make the particle size of the overflow coarse. But if the pulp density is very low, it is also possible to occur the overflow coarsening. This is because that the concentration is too low so that the pulp volume must be very great in order to maintain the production capacity calculated by the solid mass, resulting in the increases of the flow speed of the slurry in the flotation machine and thus the coarse ore particles also are rushed into the underflow stream.
It is important to understand the reasons for the deterioration of flotation indicators of the fine grains to improve the flotation efficiency. To know how to solve the problem helps to improve the efficiency.