The Test of Alumina Content in Brown Fused Alumina
Brown Fused Alumina is made from high quality bauxite by fusing in an electric arc furnace at high temperature. The quality of the raw materials determines the quality of brown fused alumina. The alumina content of bauxite that used in furnace must meet the standard, or even higher than the actual standard. At the same time, it is necessary to strictly follow the process in the production process to minimize the impact of impurities in the brown fused alumina.
The EDTA volumetric method is adopted to test the alumina content in brown fused alumina. The impurities in brown fused alumina will be tested firstly, then the alumina content will be calculated. This testing method is complicated,the index obtained also has a certain deviation. At present, it is also possible to determine the alumina content by using bitter almond acid as masking agent. The method can directly test the alumina content without test other data, which not only reduces the test procedure, but also obtains accurate data.