CAJ | 학술논문

为了比较普通硅酸盐水泥、掺加矿渣的硅酸盐水泥和碱激发水泥3种胶凝材料对铬渣的稳定固定化效果，采用硫酸硝酸法、TCLP毒性浸出法以及半动态浸出法对固定化试件总铬和六价铬的浸出规律进行实验研究．结果表明，铬渣的掺入对普通硅酸盐水泥水化反应产生负面影响，当铬渣掺量从20％增加到45％时，试件抗压强度由50．4 MPa下降到25．8 MPa；浸出液中总铬和六价铬的浓度随着铬渣掺量的增加而增加．用矿渣代替部分普通硅酸盐水泥，能够提高对铬渣中铬的固定效果，当矿渣掺量为45％时，固定效果最佳．碱矿渣水泥对低掺量的铬渣有较好的固定效果，但当铬渣掺量超过35％时，浸出液中铬的浓度大幅度增加．
위료비교보통규산염수니、참가광사적규산염수니화감격발수니3충효응재료대락사적은정고정화효과，채용류산초산법、TCLP독성침출법이급반동태침출법대고정화시건총락화륙개락적침출규률진행실험연구．결과표명，락사적참입대보통규산염수니수화반응산생부면영향，당락사참량종20％증가도45％시，시건항압강도유50．4 MPa하강도25．8 MPa；침출액중총락화륙개락적농도수착락사참량적증가이증가．용광사대체부분보통규산염수니，능구제고대락사중락적고정효과，당광사참량위45％시，고정효과최가．감광사수니대저참량적락사유교호적고정효과，단당락사참량초과35％시，침출액중락적농도대폭도증가．
In order to compare the immobilization of chromium in the chromite ore processing resi-due ( COPR) by ordinary Portland cement, ordinary Portland cement mixed with ground granulated blast furnace slag ( GGBFS) and alkali-activated slag cement, the sulfuric acid and nitric acid meth-od, toxicity characteristic leaching procedure ( TCLP) and semi-dynamic leaching test are used to as-sess the leaching behaviors of total chromium and hexavalent chromium from solidified specimens. The results show that the addition of COPR has an adverse effect on the hydration reaction of ordina-ry Portland cement.The compressive strength of the solidified specimen decreases from 50.4 to 25.8 MPa when the content content increases from 20%to 45%.The concentrations of the total chromi-um and hexavalent chromium in the leachate increase with the increase of the COPR content.Partly replacement of ordinary Portland cement by GGBFS can improve the effect of fixing chromium in COPR.When the GGBFS content is 45%, the immobilization of chromium is the best.Alkali-acti-vated slag cement exerts a better solubility control on chromium with low content of COPR.Howev-er, when the COPR content is more than 35%, the leaching concentration of chromium increases significantly.