Research on the preparing of coal water sully with semi-coke and pulverized coal

摘要

This paper makes coal water sully (Hereinafter referred to CWS) with the abandonedrnsemi-coke (less than 1 mm) and pulverized coal. Then examined what efforts the semi-coke mayrnhave to CWS properties (concentration, viscosity, stability) through the experiments. The studyrnexamined the properties of CWS that made by different raw materials, explored the best ratio ofrnsemi-coke and pulverized coal on making CWS, selected the best additive and the proper amountrnof additive and simply explored the mechanism of impact of semi-coke on coal water slurryrnconcentration. The experiment indicated that the concentration of CWS will be low if the CWS isrnmade by only semi-coke. The best ratio of prepared at a concentration of 60% of semi-coke andrnpulverized coal-water slurry is 3:7. The best additive is NBS-1B and the proper amount ofrnadditive is 0.7%. It is difficult for semi-coke to prepare a high concentration of CWS. It is becausernsemi-coal has well-developed pore. It can improve the properties of CWS if we modify thernsemi-coal with some neutral oils and organic surface modifier. This CWS has met thernrequirements of the gasification of coal water slurry.