dry ore meaning in English

干矿石
贫铅银矿石

No matter for dry ore or dry coal , maintenance worker almost changes liner plate every day because it is impermissible to do not change
无论是干矿石，还是干煤炭，维修工几乎天天换衬板,烦死了。不换不行吗？
In the two years , i use a kind of new - style liner plate , which is not only hard and wear resistant , but also has anti - falling effect , for dry ores of 9 million tons , such liner plate dose not need to be changed , please see the following chart
这两年，我使用了一种新型衬板，不但坚硬耐磨，而且有防坠功效，干矿石900万吨以内无需更换，请看下表：防坠型衬板性能表