Combined determination method for main components in high-carbon ferrochrome slag

A combined determination method for main components in high-carbon ferrochrome slag. The method is characterized by comprising the steps of: melting a high-carbon ferrochrome sample by a iron crucible; carrying out high-temperature melting decomposition by sodium peroxide; leaching in a 250ml plastic cup filled with water; acidifying and clarifying with sulfuric acid; placing at room temperature to obtain a high-carbon ferrochrome sample mother liquor; conducting constant volume analysis on the high-carbon ferrochrome mother liquor; decomposing the sample at one time; and respectively measuring the chemical composition of SiO2, Al2O3, MgO, CaO and Cr2O3 by 1) determination of Cr2O3 by potassium permanganate oxidation and ammonium ferrous sulfate titration method, 2) determination of SiO2 by a silicon molybdenum blue spectrophotometric method, and 3) determination of Al2O3, MgO and CaO by an EDTA volumetric method. The method greatly reduces the analysis time (determination of SiO2, Al2O3, MgO, CaO and Cr2O3 within four hours), while omits weighing and analysis of Al2O3 by a nickel crucible, and saves a lot of cost analysis.