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That is perfect for cleaning with oxalic acid (see Part I). The heat accelerates the action of the acid, but prevents the acid from boiling. Sand Blasting.
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Gupta , Asha and Kumar, Birendra (2000) Removal of iron from zircon sand using oxalic acid. Journal of Mines, Metals & Fuels, 48 (7&8). pp. 178-181.
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