It is proved that preduction of high-carbon graphite by chloridizing roast is better than by alcali.

指出焙烧法生产高碳石墨较法优。

The ammonium chloride is obtained by processing the by-product solution of ammonium chloride in the workshop of coordinative producing alcali.

产铵溶液在联车间加工成铵、工艺合理经济划算。