METHOD FOR EXTRACTING MAGNESIUM HAVING MINIMIZED CO^2 EMISSION

摘要

PURPOSE: A magnesium refining method capable of minimizing carbon dioxide (CO^2 ) emission is provided to contribute to resources recycling by manufacturing high purity calcium carbonate by reacting CO^2 with a by-product. CONSTITUTION: A magnesium refining method capable of minimizing carbon dioxide (CO^2 ) emission comprises the following steps. A magnesium containing oxide is obtained by putting dolomite into plastic treatment. Metal magnesium and a by-product are obtained by making the magnesium containing oxide to react with a reducing agent in a heat reduction reaction process. An aqueous solution from which Ca2+ ions flow out is obtained by mixing the by-product with water. The aqueous solution and the by-product are separated. Calcium carbonate is formed and collected by adding CO^2 to the aqueous solution. [Reference numerals] (AA) Ore; (BB) Pre-treatment; (CC) Calcination; (DD) Reductant; (EE) Reduction; (FF) By-product; (GG) Ca^2 + elution; (HH) Aqueous solution; (II) Calcium carbonate; (JJ) Recovery; (KK) Elution by-product