A study of the production of cement from spent shale by semi-dry process

Abstract

To determine the production of cement by using spent shale, limestone and clay as the raw materials. Chemical composition of the raw materials was first analysed in order to find their suitable proportions. The raw mix was made into nodule forms and was fired at various temperature and time. An analysis of the free lime in the clinkers gave the results that the lowest amount of free lime was obtained by firing the raw mix at 1400oC for one hour. Hence, the cement from spent shale was produced at those conditions. The clinkers were crushing and adding 5% of gypsum and were tested for the chemical properties, physical properties and x-ray diffractometer was used as well. The cement from spent shale which was within standard limits, has a good quality.