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6.4 Green Balls Quality
6.4.1 Drop numbers measured as per the relevant standard should be 8 times and 5 times for large-scale plants and medium/small scale plants，respectively.
6.4.2 The size range of classified green balls shall be 95%，or greater，between 8mm and 16mm in diameter，and among which the balls in the range between 10mm and14mm shall account for 80% or greater.
6.4.3 The green balls should have higher heat sensitive temperatures more than 450℃and allowable moisture fluctuations within±0.25%.
6.4.4 The fines contained in classified green balls shall be 5% or less.