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Abstract
Samples of dolomite from Hirri, Hardi and Baraduar in Madhya Pradesh were studied as regards their Suitability for use in steel plants. Chemical composition and acid insolubles were determined. Optimum temperature of calcination and size of charge for getting a good sinter were determined from the bulk density, and hydration tendency of the sintered product. The high silica content and its non-uniform distribution in Hirri dolomite resulted in the formation of dicalcium silicate which led to dusting while cooling.
Under the experimental conditions uniform sintering and bulk density could not be obtained in the dolomites studied, when the size of the charge was 10 cm. to 15 cm. However, it was possible to get a more uniform product when the size of the charge was 2.5 to 5 cm. It appeared from this study that under Indian conditions rotary kiln should be preferable to shaft kiln for the production of sintered dolomite for use in steel plants.