瓷石与高岭土的矿物成分不同，成因有别，在开采和加工方法上也有区分。
Porcelain stone and kaolin have different ingredients and origins so that they have different methods of quarrying and processing.
本研究全面测试了超细加工的四种不同细度的天然硅灰石矿物的细度与活性，并用逐步回归分析的方法建立了粉体细度与活性的数学模型。
The paper systematically studies the relationship of fineness and activity of four different fine natural Wollastonites, and sets up the mathematic model with step by step regression design.
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