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美国矿山局正在进行新型的脱水技术的开发研究，以便有利于从钢厂污泥中回收有价值的铁。实验室试验表明，用一台板框式过滤机通过丙酮置换的方法可使底吹氧气转炉烟气污泥脱水至含水量12％。由于丙酮可用蒸馏法回收，所以该方法成本低于传统的热干燥法，预计污泥丙酮处理法的附加能耗包括丙酮的回收在内约为每吨干渣5－7美元。
The US Bureau of Mines is developing a new type of dewatering technology to facilitate the recovery of valuable iron from mill sludge. Laboratory tests show that the bottom blowing oxygen converter flue gas sludge can be dewatered to a moisture content of 12% by a plate-frame filter by means of acetone displacement. Since acetone can be recovered by distillation, the cost of the method is lower than that of the conventional thermal drying method. It is estimated that the additional energy consumption of the sludge acetone treatment, including the recovery of acetone, is about 5-7 dollars per dry residue.