1 Based on test results, the processing procedures for water-glass coating are formulated and the coating machine is designed.

2 The rigorous requirement of circumstance protection gives the water-glass sand without pollution a good chance to develop greatly.

3 In this paper, the new evolution of the research and its application on technologies and materials of water-glass sand are introduced.

4 The hydrated silicic acid slurry can be prepared through the reaction of water-glass and sulfuric acid, water-washing and homogenization treatment.

5 Preparing X-type molecular sieve with natural clay minerals has many points of advantage:No aluminum hydroxide is needed and large amount of alkali and water-glass may be saved.

6 The quantity addition of octanol is 0.30% quantity of water-glass.