火法炼铜过程产出的废镁砖,除少量用作筑炉填料或回收使用外,大部分只能露天堆放,既浪费了国家资源,又污染了环境。国内有些单位以硫酸盐形式回收废镁砖中的氧化镁和铜,但硫酸镁用途有限。为了扩大废旧镁砖的利用范围,我们进行了用碳酸氢镁法从废镁砖中提取轻质碳酸镁的试验,取得了满意结果。 Most of the waste magnesia bricks produced by the pyro-copper refining process are only stored openly in the open, except for a small amount used as building materials for filling or recycling, which is not only a waste of national resources but also pollutes the environment. Some domestic units to recover magnesia and copper in the waste magnesia brick in the form of sulphate, but the use of magnesium sulphate is limited. In order to expand the utilization range of waste magnesia bricks, we carried out the test of extracting magnesium carbonate from waste magnesia bricks by the method of magnesium bicarbonate, and achieved satisfactory results.