To quickly modify and process steel slag, immediately after generation, to the state which can be used as valuable raw materials while processing in a favorable forms and conditions in environmental aspects.
The method for processing steel slag comprises a step A of charging molten slag into a rotating drum which stores metal balls after mixing a slag modifying agent to molten slag, and while cooling slag by allowing it to be in contact with the metal balls rotating in the rotating drum, crushing with the physical action by rotating the metal balls to form crushed slag. Further the method preferably comprises, as a step to follow the step A, at least one step selected from the steps of: a step B of recovering metals, a step C of hydrating a calcium portion in the crushed slag and a step D of carbonating noncarbonated Ca in the crushed slag. According to the use of slag, modified and processed granular slag can be obtained quickly without a crushing process and an aging process for recovery of metals and without the generation of high pH elution water, and thus slag products are prepared under environmentally friendly conditions.
MIYATA YASUTO
TAKAHASHI KATSUNORI
MATSUNAGA HISAHIRO
TOUBOU HIROYUKI
YABUTA KAZUYA
TAKAHASHI TATSUTO
HAYASHI AKIO
| JPH1036148A | 1998-02-10 | |||
| JPS5388688A | 1978-08-04 | |||
| JPH06329449A | 1994-11-29 | |||
| JP2005097076A | 2005-04-14 | |||
| JP2005200234A | 2005-07-28 | |||
| JP2003146712A | 2003-05-21 | |||
| JPS53144491A | 1978-12-15 |
| CN1318648A | 2001-10-24 | |||
| WO2006024231A1 | 2006-03-09 |