Abstract:After upgrading and reforming the flotation system, Sizhou concentrator has realized large-scale, automatic and intelligent production. At the same time, some defects were exposed after the flotation equipment had been running for a long time, which restricted the performance and production indexes of the equipment. After the flotation column was operated for a long time, some large coarse grain slurry was deposited at the bottom of the flotation column, resulting in the blockage of the bottom flow tube and the abnormal automatic regulation of the production system, which brought inconvenience to the production operation and directly affected the flotation index.Therefore, the bottom flow system of flotation column has been optimized and improved, and the production and application performance of flotation column has been greatly improved, the production operation and production index of our plant have been stabilized, and the controlling effect of flotation performance is very remarkable^［4］.