... line has the following features:1), iron/steel removing ratio>99.5%, fiber removing ratio>98%2),compact structure ensure running safety ... adopt automatic control system for whole line, reduce labor cost;5),no sewage and waste gas discharge, environment protection.6), ... 560Back roll diameter 400 450 510Roll length600650800Front roll surface speed (m/min)17.3223.225.56Friction ratio1:1.381:1.381:1 ...