Fine coal deashing and deferrization with flotation and magnetic separation combined process
HUANG Wenhao
SHEN Qianghua
CHEN Wen
CHEN Sheng
HUANG Zhichao
MA Tao
SUN Anping
Abstract：To decrease the ash and iron content in bituminous coal which is used for industrial silicon production.Taking the fine slime of one coal mine in Yunnan Province as research object,conducted the magnetic separation for deferrization and the flotation for deashing,obtained the best experimental condition,then conducted the deferrization and deashing test with flotation and magnetic separation at the same time.The best condition of the experiment is that the magnetic field intensity is 1.701 T and the grain size of the coal slime is -0.25 mm.Swap the experimental order on magnetic separation and flotation,compare the effects of different experimental order.The process of flotation first then magnetic separation has better economic benefits which saves a filtration. The industrial silicon production requires that the ash and iron of bituminous coal should be less than 6% and 0?3%.When the clean coal productivity is 62.08% after flotation,the ash and iron of final clean coal is 5.94% and 0.28% respectively which meets the demands of industrial silicon production.
Keywords：fine coalflotationmagnetic separationdeashingdeferrization
Publication Date：2014-01-01
Pages：5( 44-48 )