In order to determine the quality of bauxite, ie, alumina extraction yield, amount of alkali loss and amount of red mud, extraction tests are usually carried out. In some cases, however, more rapid calculatim is desired, even though the accuracy is little less. A simplified caluculation method for alumina trihydrated type bauxite was thus studied for the purpose of estimating the above-said elements from the chemical components of the ore. Particularly, in case of malayan bauxite the caluculation can be more simplified.
