Granite / Manufacturer of raymond roller mill ultra fine ...
Granite is formed from igneous rock. It is a kind of hard steel crystalline stone. It is initially formed from feldspar and quartz and mixed with one or more black minerals. It is evenly arranged in structure. Granite is mainly composed of quartz, feldspar and mica. The content of feldspar is 40% ~ 60%, and the content of quartz is 20% ~ 40%.
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