Comparing to rawlimestone opencast collected, that exploited from cave is higher in purity, less in impurity and steadier in quality.
原料石灰石采用洞采方法，与露天采集的原料比，纯度高、杂质少、质量稳定。
2
The results show that the modified limestone shows higher surface area and pore volume, and its pore size distribution is better than that of rawlimestone.
结果表明：调质改善了石灰石的孔结构特性，在直接硫化过程中比原始石灰石具有更高的钙转化率；
3
Transportation scheduling system of a cement raw material quarry is a complicated system involved with the yield, quality and transportation cost of rawlimestone.