balling index for iron ore concentrates

例句：

1. 1. The balling index of the ore concentrates is a crucial factor in determining the quality of the final product.
   矿石浓缩物的球团矿指数是决定最终产品品质的关键因素。
2. 2.The balling index has been steadily increasing, indicating that the ore concentrates are becoming more valuable.
   球团矿指数稳步上升，表明矿石浓缩物越来越有价值。
3. 3. In order to improve the efficiency of the iron ore processing plant, it is necessary to optimize the balling index.
   为了提高铁矿石加工厂的效率，有必要优化球团矿指数。