水玻璃旧砂及再生砂中Na_2O含量测试中不同提取法的研究  

Comparative Study on Determination Methods for Na_2O Content in Used Sodium Silicate Sands

作　　者：卢记军[1] 闻向东[2] 谭远友[3] 陈锐[3] 

机构地区：[1]武汉纺织大学机械与自动化学院,湖北武汉430073 [2]武汉钢铁集团公司研究院,湖北武汉430061 [3]武汉纺织大学环境工程学院,湖北武汉430073

出　　处：《热加工工艺》2013年第13期65-66,68,共3页Hot Working Technology

基　　金：武汉纺织大学校基金重大项目(123005)

摘　　要：采用索氏提取法、蒸淋法、浸泡法、碱浸法和微波法从水玻璃砂中提取Na2O,用酸滴定Na2O含量,然后与常用的固体直接滴定法测试结果进行分析比较。结果表明,不同方法测定的水玻璃砂中的Na2O含量差异较大,说明不同方法的Na2O提取率不同,索氏提取法效果最佳,与直接法测定结果比较,索氏提取法测得的Na2O含量提高了23%以上,说明采用索氏提取法提取旧砂中的Na2O较完全,Ф确度高,可以代替现行水玻璃旧砂Na2O含量的测试方法。Na2O was extracted from used sodium silicate sands by soxhlet extraction, soaking method, alkali-soaking method, steaming ＆ rinsing method, microwave extraction, respectively, and Na：O content was determined by titration. The results indicate that the relative Na2O content is different under different extraction methods. Soxhlet extraction was preferred among the four methods. Na2O content by using Soxhlet extraction is 23% higher than normal method. Na2O can be extracted more from used sodium silicate sands by soxhlet extraction. Soxhlet extraction method can take the place of current method.

关 键 词：水玻璃旧砂 索氏法 蒸淋法 浸泡法 碱浸法 微波法 NA2O 

分 类 号：TG221[金属学及工艺—铸造]