1.College of Resources and Environmental Engineering, Wuhan University of Science and Technology；2.Key Laboratory of Efficient Utilization of Metallurgy Mineral Resources and Agglomeration in Hubei Province
Research was done on grinding effect of 7 kinds of grinding aids to a magnetite in Hubei Province. The results indicated, under the condition of grinding concentration 70%,grinding time 2 min, proper grinding aids were all have remarkable grinding aid effect for grinding of magnetite. Lime, sodium hexametaphosphate, sodium tripolyphosphate, sodium pyrophosphate could increase the content of 0.075～0.045 mm size fraction in milling mineral discharging products greatly; sodium hydroxide, sodium silicate, sodium carbonate could increase the content of -0.045 mm size fraction in milling products greatly. Excess grinding aids not only have no grinding aid effect, instead it is against grinding.