Abstract: With the increasing output of electric steel,the demand for silicon steel grade magnesium oxide (MgO) is larger and larger in China,and the traditional MgO production process with dolomite as raw material has been unable to meet market demand.China is a brine resource rich country,the study of how to comprehensively utilize salt lake resources has become increasingly important.As a coating material used for preparing oriented silicon steel,silicon steel grade MgO is mainly used in the process of high temperature annealing of oriented silicon steel and serves as release agent,insulation layer,dephosphorization flux,desulfurizer and so on.Preparation methods,process flow,study progress,and existing problems of silicon steel grade  MgO were summarized,development direction of preparation technology of silicon steel grade MgO was pointed out and proposals for utilizing China′s brine resources were put forward.  

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