Research on Reducing Alkalinity of Light Calcium Carbonate with Built Low-Grade Polymer

Light calcium carbonate was usually manufactured by chemical process,so its high alkalinity could not be avoided easily.Moreover,raw material of light calcium carbonate impacts its alkalinity directly.In this paper,in order to solve the high alkalinity problem caused by low quality raw material,a kind of built low grade polymer at dry powder and solution state respectively was used to reduce the alkalinity of light calcium carbonate.The experimental results showed that it was a good method to reduce the alkalinity of light calcium carbonate with the solution.The process difficulty,complexity and the production period were not influenced and it provided a new way to reduce the alkalinity of light calcium carbonate.At present,this new process has been applied for mass production of light calcium carbonate in our company.