製鋼スラグの処理方法,申请号JP20130040971-传众专利搜索

製鋼スラグの処理方法

申请公布号：JP6089792(B2)

申请号：JP20130040971

申请日期：2013.03.01

申请公布日期：2017.03.08

申请人：

新日鐵住金株式会社

发明人：松林重治;成木紳也;萩原快朗;具島昭

分类号：C04B5/00;B09B3/00;B09B5/00;C21C7/04;C22B1/16;C22B7/04;C22B26/20;F27D15/00

主分类号：C04B5/00

摘要：PROBLEM TO BE SOLVED: To provide a processing method of steelmaking slag by which a gypsum component can be efficiently obtained from the steelmaking slag, and the gypsum component can be used as a sinter auxiliary feedstock.SOLUTION: The processing method of steelmaking slag conducts: a step in which the steelmaking slag is classified to a grain diameter of less than 500 μm; a step in which the steelmaking slag powder obtained by being classified is processed with sulphuric acid solution in a dissolver, thereby Ca content is separated to insoluble CaSO, and at least Al, Cr, Mn, P and Fe components are separated to a dissolution liquid; a step in which solid liquid separation is performed on the processed solution to recover the CaSO; and a step in which the recovered CaSOis used as a sinter auxiliary feedstock.