Abstract:

The paper introduces optimization of size composition to strengthen the dewatering of flotation coal，and study the dewatering process with self-made testing apparatus. Through analysis of the filtering process,，the velocity equation of filter process is built and the concept of specific resistance is put forward. Experiments show that the moisture of flotation coal is effectively reduced through gradation optimization technology. Besides，this process is studied combining with the specific resistance，which concludes that the comprehensive effect is good when the ratio is 0.2. At last，the ways and effects of preliminary implementation into the industry are put forward.

Key words: filtering, dewatering, size composition, flotation coal, coarse coal fine