Determination of CaO, MgO and SiO2 in Carbon-magnesia Pellet Composite Deoxidizing and Desulfurizing Agent
CAO Yuhong
GAO Zhuocheng
WANG Huiqing
LIU Chunyang
Abstract：The sample is melt by alkaline flux, then leached and acidized by diluted hydrochloric acid and constant volume. A part of testing solution is taken, and the acidity of each element is controlled by regulation during analysis. By the logarithm difference of 5.8 between calcium/magnesium and EGTA complex constant, in the presence of Mg, the content of Ca may be titrated by EGTA to shelter Ca at the same time, then CyDTA is used to titrate Mg, then the content of SiO2 is determined by silicon molybdenum blues photometry, realizing the fast analysis of MgO, CaO and SiO2 by the same mother solution. By this method, the determination of MgO, CaO and SiO2 in carbon-magnesia pellet is carried out, and the result is satisfactory and the RSDs are less than 0.24%(MgO), 2.82%(CaO) and 2.93%(SiO2) respectively.
Keywords：carbon-magnesia pelletcompleximetryphotometryCaOMgOSiO2
Publication Date：2013-01-01
Online Publishing Date：2026-05-22(First online date of this platform, not the publication date of the document)
Pages：3( 41-43 )