Indonesia oil sand silt was used as calcareous raw material to produce portland cement clinker. Effects on clinker burning and cement properties have been studied and compared with limestone. Results showed that, Indonesia oil sand silt as calcareous material, could meet the requirements of cement raw meal preparation. However, the raw meal burnability was poorer and the content of fCaO in clinker was higher than that using limestone as calcareous raw material. With the increase of burning temperature, the content of fCaO in clinker became close, and the clinker mineral formation was good, the initial and final setting time was relatively long, however, the interval between the cement initial and final setting time was short. When the proportion for the oil sand silt and limestone was each 50%, the raw meal burnability became better, the fCaO content in clinker was lower, the normal clinker mineral was formed, and the cement final setting time was shortened. The clinker strength of each age was improved, especially for 100% oil sand silt as calcareous raw material, followed by 50% oil sand silt and 50% oil limestone. The oil sand silt can partially or wholly replace the limestone to produce cement.

In order to adapt to materials with different grindability, high moisture content and different product specifications, a new roller mill device -TRM36.3 wet coal-fired furnace slag /slag vertical roller mill was designed and developed. The mill would be able to grind not only more than 25% moisture content of wet coal-fired furnace slag to prepare ultra-fine powders, but also slag powder, which achieve a specific surface area of 600m2/kg or more with the roll mill main motor consumption of 17~18kWh/t for wet coal-fired furnace slag, and the specific surface area of above 420m2/kg with the main motor electrical energy consumption of 26~28kWh/t for slag. The mill was multi-functional and energy-saving, which will greatly accelerate the solid waste utilization, and create more economic benefits. That was extremely important to energy conservation and environmental protection.