The experiment results in the paper show that quantitative additive putting in the hydration water can check the iron ion content of the monohydrate sodium carbonate,to attain the goal of improving the whiteness of dense soda ash,in the solid hydrated technological process.

The influence of drying condition of monohydrate sodium carbonate on the whiteness of dense soda ash is discussed in this paper.

Construction of High-Pressure Jet Grouting for Danger-removal and Reinforcement of Qiyi Reservoir;