... adjustable fineness, low cost, effectively improving. It is suitable for crushing high quality of basalt, diabase, granite, river gravel, limestone ... different customers.1.Firstly, the stone was broken by primary crushing machine such as jaw crusher, impact crusher, then, the coarse ... medium, coarse sand, the fineness modulus is of 2.6-3.6 in turbid, particle size distribution even and adjustable, with ...