Limestone often contains small amount of magnesium oxide that is harmful to soundness of cement.
石灰石中经常含有少量的氧化镁，这对水泥的安定性有害。
This paper describes the process in detail of mixing and burning to produce high magnesium metallurgical lime in shaft kiln with the material of limestone and dolomite.
介绍了以石灰石和白云石作原料在坚窑中混烧试制高镁冶金石灰的具体过程。
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