YB/T 101-1997 MgO-CaO-Fe2O3 System synthesized material for bottom of electro-arc furnaces

YB/T 101-2018 Electric furnace bottom with MgO-CaO-Fe2O3 system synthesis material

GB 2999-1982 GB 5069-1985 GB 5072-1985 GB 5988-1986 GB/T 8170-1987 Rules for rounding off of numberical values YB 4004-1991 The chemical analysis method for high-quality magnesia sand using diethylphenylamine methane photometry to determine the amount of titanium dioxide YB 4005-1991 The chemical analysis method for high-quality magnesia sand using EDTA capacity method to determine the amount of oxide calcium YB 4006-1991 The chemical analysis method for high-quality magnesia sand using weight method to determine the calcined reduction percentage YB 4007-1991 The chemical analysis method for high-quality magnesia sand, determination of aluminum oxide content using Prussian blue S spectrophotometry YB 4008-1991 The chemical analysis method for magnesia sand: determination of free calcium oxide using ethylene glycol hydrochloric acid volumetric method YB 4009-1991 The chemical analysis method for high-quality magnesite, determination of silicon dioxide content using molybdenum blue photometry YB 4010-1991 "Method for Chemical Analysis of High-Quality Magnesite - Method of Difference Subtraction to Determine the Content of Oxide Magnesium" Translation: Deduct method is used to determine the content of oxide magnesium YB 4011-1991 The method of chemical analysis for high-quality magnesia sand, determination of phosphorus pentoxide using molybdenum blue photometry YB 4012-1991 The chemical analysis method for high-quality magnesia sand, determination of manganese oxide content using potassium periodate photometry YB 4013-1991 The chemical analysis method for high-quality magnesite: determination of iron oxide content using the method of phthalic acid-based spectrophotometry with o-phenanthroline