Lightcalciumcarbonate was usually manufactured by chemical process, so its high alkalinity could not be avoided easily.
由于轻质碳酸钙都是化学法生产，碱度高不易避免，而且轻质碳酸钙的生产原料质量直接影响其碱度。
2
For example: HP vesicant, lees, lightcalciumcarbonate, active white earth, magnetic powder, graphite, medical slag and so on.
如：H P发泡剂、酒糟渣、轻质碳酸钙、活性白土、磁粉、石墨、药渣。
3
The results show that this method is suited to character activated lightcalciumcarbonate and activated heavy calcium carbonate which particle is very fine.