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铁精矿的滚动成型是球团过程的第一个作业。生球的质量。在很大的程度上决定着合格球团矿的质量。因此通晓细磨物料滚动成型的规律,是制定有效的铁精矿球团方法所必需的。对于精矿滚动成型作业的基本要求,是得出尺寸为10～30mm、机械强度大和热稳定的生球。例如,直径为20mm的生球应经受得住不小于2Kg的压碎载荷,从1 m高处落下一次不应破碎和在用温度不低于300℃的干燥用气体处理时不应破裂。
Roll forming of iron concentrates is the first operation of the pellet process. The quality of the ball. To a large extent determine the quality of qualified pellets. Knowing the law of roll forming of finely ground materials is therefore necessary to develop an efficient method of iron concentrate pellets. For the basic requirements of the rolling operation of concentrate, it is derived from the size of 10 ~ 30mm, mechanical strength and thermal stability of the ball. For example, green balls with a diameter of 20 mm shall withstand a crushing load of not less than 2 kg, shall not be crushed once falling from 1 m and shall not be cracked when treated with a drying gas having a temperature not lower than 300 ° C.