First, the iron content of ore is the most important criterion for evaluating the quality of iron ore;

Secondly, it is the chemical composition of gangue;

Third, it is harmful impurities in ore, including S, P, Pb, Zn, As, Cu, The content of K, Na, F, etc.;

Fourth is the reducibility of the ore;

Fifth is the softening property of the ore;

Sixth is the particle size composition of the ore;

Seventh is the mechanical strength of the ore;

Eighth is the ore. Chemical composition stability.