It is also found that separately defining rich pocket in the enrichment zone of useful components has important effect on raising the grade of flotation ore and economic benefit of mine.

The rich ores of phosphorite occur in the upper bed of Zhongyicun member, Meishucun formation, Cambrian.

Experimental research on cold bonding briquette of MnSi alloy powder with adding manganese ore fines;

Sm-Nd isotopic dating of apatite separates from Heiyingshan high-grade iron deposit, Inner Mongolia;