保存性和旧砂回用是推广水玻璃石灰石砂中急待解决的关键问题。上海汽轮机厂在这方面做了很多工作,并初见成效。希望其他使用水玻璃石灰石砂的单位在这方面做进一步的试验研究,寻找更多、更理想的解决方法。 Preservability and reuse of used sand are key issues to be urgently addressed in the promotion of water glass limestone sand. Shanghai Steam Turbine Works done a lot of work in this regard, and achieved initial success. I hope other units using water glass limestone sand in this area to do further experimental research, looking for more and more ideal solution.