Calcium metal production process

• Main Authors: ZHAO ZHIQIANG, MA ZHANBAO, YAN PEIYING, YANG CHENXIANG, FENG KANG, WANG JINGHONG
• Format: Patent
• Language: Chinese; English
• Published: 04.09.2020
• Subjects: APPARATUS THEREFOR; CHEMISTRY; ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTIONOF COMPOUNDS OR NON-METALS; FERROUS OR NON-FERROUS ALLOYS; METALLURGY; PRETREATMENT OF RAW MATERIALS; PROCESSES FOR THE ELECTROLYTIC PRODUCTION, RECOVERY ORREFINING OF METALS; PRODUCTION AND REFINING OF METALS; TREATMENT OF ALLOYS OR NON-FERROUS METALS

The invention relates to a calcium metal production process. The process comprises the following steps that S1, calcium carbide sludge slurry and hydrochloric acid waste liquid in a process for producing polyvinyl chloride through a chlor-alkali acetylene method serve as raw materials to be added into a contact agent to prepare calcium chloride mother liquor; S2, the calcium chloride mother liquoris subjected to drying and granulating to from anhydrous calcium chloride; S3, the anhydrous calcium chloride is added with potassium chloride and electrolytic copper and then is subjected to electrolyzing in an electrolytic cell to obtain a copper-calcium alloy and chlorine, wherein the chlorine is returned to the step S1 to react with the calcium carbide sludge slurry to generate calcium chloride mother liquor; and S4, the obtained copper-calcium alloy is added into a vacuum distillation furnace for distillation in a heat preservation state, and the calcium metal is purified under the protection of inert gas. Accor