1·Raw ore cannot be used directly in blast furnace. It must be prepared beforehand.
原矿是不能直接用于高炉冶炼的，必须事先对之加工处理。
2·The average leaching recovery of gold reaches 86.01% from high grade raw ore and flotation concentrate of gold in pilot test.
半工业试验对浮选金精矿和高品位原矿平均金浸出率达86．01％。
3·The grade of raw ore is a very important technical and economical index for mining enterprises.
前言： 原矿品位是矿山生产中非常重要的技术经济指标。