石墨电极粉铺垫混合熔剂助熔测定窑渣中主要成分  

Determination Main Components in Kiln Slag with Graphite Electrode Powder Bedding Mixed Solvent Flux

作　　者：马文广[1] 郝选科 关祥忠 MA Wenguang;HAO Xuanke;GUAN Xiangzhong(Rizhao Steel Holding Group Co.,Ltd.,Rizhao 276806,China)

机构地区：[1]日照钢铁控股集团有限公司,山东日照276806

出　　处：《山东冶金》2024年第1期45-48,共4页Shandong Metallurgy

摘　　要：本法尝试采用滤纸包裹试样,置于预先用石墨电极粉铺垫好的刚玉坩埚中,于900~950℃的高温炉中熔融10~20 min,至熔融物透明,盐酸浸取,过滤掉少量石墨粉,将滤液加热蒸发至干。在浓盐酸中加动物胶使硅酸凝聚沉淀,经过滤、洗涤、灼烧、称量,计算SiO_(2)的质量分数。所得滤液以氨水沉淀分离,滤液用EDTA标液滴定,计算CaO和MgO的质量分数。氢氧化物沉淀用盐酸溶解,再在氢氧化钠溶液中沉淀分离Al,分取滤液用氟代盐取代EDTA,用铜标液滴定,计算Al_(2)O_(3)的质量分数。This method attempts to wrap the sample with filter paper,place it in a corundum crucible pre-paved with graphite electrode powder,and melt it in a high-temperature furnace at 900℃ to 950℃ for10to 20minutesuntil themeltistransparentand leached in hydrochloric acid.A smallamount of graphite powder is filtered out,the filtrate is heated to evaporate to dryness.Adding animal glue to concentrated hydrochloric acid to coagulate and precipitate silicic acid.After filtering,washing,burning,and weighing,the mass fraction of SiO_(2) is calculated.The obtained filtrate was separated by precipitation with ammonia water,and the filtrate was titrated with EDTA standard solution to calculate the mass fraction of CaO and MgO.The hydroxide precipitate is dissolved in hydrochloric acid,and then precipitated in sodium hydroxide solution to separate Al.The filtrate is divided into fluorinated salt instead of EDTA,titrated with copper standard solution,and the mass fraction of Al_(2)O_(3) is calculated.

关 键 词：石墨电极粉 高温熔融 刚玉坩埚 窑渣 硅酸凝聚 滴定 

分 类 号：O655.2[理学—分析化学]