公开(公告)号：US4889697A

公开(公告)日：1989-12-26

申请号：US280378

申请日：1988-12-05

申请人： Tsutomu Fukushima ,  Tsugio Nakao ,  Kasane Yamashita ,  Takao Komuro ,  Katsuhiro Nishi

发明人： Tsutomu Fukushima ,  Tsugio Nakao ,  Kasane Yamashita ,  Takao Komuro ,  Katsuhiro Nishi

IPC分类号： C01G49/00 ,  C01G49/06 ,  C23G1/36

CPC分类号： C23G1/36 ,  C01G49/06 ,  C01P2006/80 ,  Y10S423/01 ,  Y10S423/02

摘要： According to the subject method of refining a ferrous ion-containing acid solution, a metal selected from a group including Al, Cr, V, B, and Zn or an acid solution of that metal is added to a ferrous ion-containing acid solution, such as an acid solution which remains after steel is washed with an acid. The pH value of the acid solution is controlled to be within the range of 3.5 to 6 by adding an alkali liquid to the acid solution, whereby a hydroxide salt of the added metal is produced in the acid solution and the impurities in the acid solution are captured by the produced hydroxide salt. As a result, the impurities can be eliminated from the acid solution such that the Si component (e.g., SiO.sub.2) content in the acid solution is within the range of 2 to 3 ppm or less. Since the content of the other impurities such as Al, Ti, and Cr can also be reduced, a high-purity iron oxide can be obtained from the resultant acid solution.

摘要翻译： 根据本发明的含有亚铁离子的酸溶液的方法，将含有Al，Cr，V，B和Zn的金属或该金属的酸溶液中的金属加入到含亚铁离子的酸溶液中， 例如在用酸洗涤钢之后残留的酸溶液。 通过向酸性溶液中加入碱液将酸溶液的pH值控制在3.5〜6的范围内，由此在酸溶液中产生添加金属的氢氧化物盐，酸溶液中的杂质为 由产生的氢氧化物盐捕获。 结果，可以从酸溶液中除去杂质，使酸溶液中的Si成分（如SiO 2）含量在2〜3ppm以下的范围内。 由于还可以减少Al，Ti和Cr等其它杂质的含量，所以可以从得到的酸溶液中获得高纯度的氧化铁。