公开(公告)号：WO2007128864A1

公开(公告)日：2007-11-15

申请号：PCT/FI2007/000120

申请日：2007-05-07

Applicant: OUTOKUMPU OYJ ,  LUNNER, Sven-Erik

Inventor： LUNNER, Sven-Erik

IPC: C21C7/076 ,  C02F1/62 ,  C01F11/22 ,  C23G1/36 ,  C02F103/16

CPC classification number: C02F1/66 ,  C02F1/008 ,  C02F11/18 ,  C02F2101/14 ,  C02F2101/20 ,  C02F2101/303 ,  C02F2103/16 ,  C21C7/076 ,  C22B1/02 ,  C22B7/006 ,  C23G1/36 ,  Y02P10/234 ,  Y02P10/242

Abstract: The invention relates to a method in connection with steel production for handling of hydroxide sludge formed in the neutralization of spent metal-contaminated pickling agents from a pickling step for steel, preferably stainless steel and for using calcium fluoride in the hydroxide sludge to replace the natural fluorspar as a fluxing agent in connection with steel production. Accordingly, the addition of the reactive neutralization medium is monitored by the pH electrodes operated in continuous fashion, and the pH value is adjusted at the range between 9,0 and 9,5.

Abstract translation: 本发明涉及一种与钢铁生产相关的方法，用于处理由用于钢，优选不锈钢的酸洗步骤中和废金属污染的酸洗剂中形成的氢氧化物淤泥，以及在氢氧化物淤泥中使用氟化钙来代替天然 氟石作为与钢铁生产有关的助熔剂。 因此，通过以连续方式操作的pH电极监测反应性中和介质的添加，并且将pH值调节在0.9至9.5之间的范围内。