Dry Process:

Figure: Flow Diagram of Dry Process

In the dry process, the raw materials are crushed dry and fed within correct proportions into a grinding mill. A raw material are dried and crushed within an extremely fine powder. A dry powder is known as raw meal. The dry powder is further blended and corrected for its right composition and mixed by using compressed air. The aerated powder tends to behave almost like liquid and in about one hour of aeration a uniform mixture is obtained. The sieved blended meal fed into a rotating disc called as granulator. The pellets of blended meal are created through adding water approximately 12% to permit air flow for exchange of heat for chemical reactions and conversion of the same into clinker.

The dry process is economical. In this method, equipment used is comparatively smaller. The consumption of coal in this method is very low as compared to wet process. In case of mixing of raw materials by dry process, the raw mix is formed and in case of mixing of raw materials by wet process, the slurry is created.

The remaining operations, e.g. burning and grinding are same as that of the wet process.