... .8-1.0>1.5-2.0Colloidindex,ml/15g±50-70>90Moisture,%≤12≤12Methylene blue ... 95Metallurgy pelletWater absorption,2h%≤120≤150Sorption capacity ,ml/g±≥9-12>12-15Refractoriness,°C1200-1300≥ ... suspension property 600r/min≥30>30Fluid loss /ml , 300min≤15.0<13Mud making rate,m3/t2.5 ... -8.7<8.7 The refined Na-bentonite quality index ItemIndexWhiteness,%≥75Size,mesh300Colloidindex,ml ...