BS 4140-5-1986 氧化铝试验方法.第5部分:二氧化硅含量测定

标准号：BS 4140-5-1986
中文标准名称：氧化铝试验方法.第5部分:二氧化硅含量测定
英文标准名称：Methods of test for aluminium oxide - Determination of silica content
标准类型：G13
发布日期：1986/1/31 12:00:00
实施日期：1986/1/31 12:00:00
中国标准分类号：G13
国际标准分类号：71.100.10
适用范围：This International Standard specifies a reduced molybdo-silicate spectrophotometric method for the determination of the silica content of aluminium oxide primarily used for the production of aluminium. The method is applicable to products having an SiO2 content between 0,005 and 0,025 % (m/m), provided that the content of (P2O5 + V2O5) does not exceed 0,02% (m/m). 1 Special cases 1.1 SiO2 content between 0,025 and 0,25%(m/m)[(P2O5+V2O5)content not exceeding 0,02%(m/m)]. 1.2(P2O5+V2O5)content exceeding 0,02%(m/m)(under study).