Abstract: Based on the study of the energy consumption in blasting, crushing and grinding in some iron ore mines in East Hebei, a model for a rational distribution of comminution energy consumption for Anshan-type magnetite ore of East Hebei is established. The redistribution of the energy consumption in the comminution process of Anshan type magnetite ore of East Hebei by using this model can minimize the total comminution energy consumption. According to the results of the calculation based on this model, Bangmoshan Iron Mine, Tangshan Steel can reduce the grinding energy consumption by 4.93 kW·h/t and the total cost of ore comminution by 2.19 yuan /t if the unit cost of the blasting in the pit is increased by 0.08 yuan/t and the crushing energy consumption in the mill by 0.58 kW·h/t, which may lead to a of an annual comminution cost reduction of 3.285 million yuan.

Key words: Anshan-type magnetite ore, Model for the rational distribution of comminution energy consumption, Blasting, Crushing, Grinding