to remove........gangue, basic flux is used?
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Silica (SiO2) is used to remove basicearthly impurities (gangue) such as lime (CaO) or MgO. ... It is similar to Acidicflux but only difference is that we takebasic substances like CaO for welding process or extractive metallurgy or Smelting.
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silica is the answer
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