以石墨坩埚熔融连铸保护渣用EGTA和CyDTA测定其钙镁的含量  

The content of calcium oxide and magnesium oxide in continuous casting mold flux was measured byEGTA and CyDTA

作　　者：乔红梅 赵海东 祁正荣 祁旭丞 QIAO Hong-mei;ZHAO Hai-dong;QI Zheng-rong;QI Xu-cheng(Qinghai key laboratory of Metallurgical Product Research and development,Qinghai Xigang Special Steel Technology Development Co.Ltd,Xining 810005,China)

机构地区：[1]青海西钢特殊钢科技开发有限公司青海省冶金产品研究与开发重点实验室,青海西宁810005

出　　处：《世界有色金属》2023年第9期184-186,共3页World Nonferrous Metals

摘　　要：本文用石墨坩埚和混合溶剂在马弗炉中熔融试样,稀盐酸浸取,以氨水分离铁、铝、钛,铜试剂分离锰,分取部分滤液,加少量钙黄绿素-茜素混合指示剂用EGTA标准液滴定测定其氧化钙含量;再分取部分滤液,加过量EGTA标准溶液掩蔽钙,以酸性铬蓝K萘酚绿B为指示剂,用CyDTA标准溶液滴定,测定其氧化镁的含量。In this paper,graphite crucible and mixed solvent are used to melt the sample in muffle furnace.Dilute hydrochloric acid is used to soak the sample,and ammonia is used to separate iron,aluminum,titanium man-ganese.Part of the filtrate is separated,a small amount of calcein indicator is added to titrate the content of calcium oxide with EGTA standard solution;Part of the filtrate is separated,excess EGTA standard solution is added to mask calcium,acid chrome blue K naphthol green B is used as indicator,and CyDTA.standard solution is used to titrate the content of magnesium oxide.

关 键 词：石墨坩埚 混合溶剂 连铸保护渣 EGTA滴定 CyDTA滴定 

分 类 号：TF63[冶金工程—钢铁冶金]