Usage of Olivine 1. used for refractories 2. used as flux of metallurgy and regulator of slag: MgO: 40%min. Al2O3: 1.6%max. S: 0.26% max. P: 0.05% max. 3. used for foundry: olivine in powder is widely used for foundry to produce cast steel, especially manganese steel, in many developed countries. 4.Granulate on any mesh