中南民族大学学报（自然科学版）2024，Vol.43Issue(1)：16-23,8.DOI:10.20056/j.cnki.ZNMDZK.20240103
软锰矿协同铬渣水热回收铬和锰
Hydrothermal recovery of chromium and manganese using pyrolusite with chromite ore processing residue
摘要
Abstract
The industrial production of chromium salt generates a large amount of chromite ore processing residue(COPR).The residual Cr(Ⅵ)and Cr(Ⅲ)in COPR not only pose the risk of"re-yellowing"and polluting the ecological environment,but also cause waste of chromium resources.Herein MnO2 in pyrolusite was utilized to oxidize the residual Cr(Ⅲ)in chromium residue to Cr(Ⅵ)under acidic condition,then recover manganese and chromium through leaching to eradicate the risk of"re-yellowing"of COPR.The results indicated that the leaching rate of Cr(Ⅵ)reached 100%and Mn 89.15%under reaction temperature of 150℃,reaction time of 1.5 h,mass ratio of COPR to pyrolusite of 1∶1,solid-liquid ratio of 1∶20,and 3 mol·L-1 of sulfuric acid.The leaching concentration of the remaining total chromium in the detoxified slag under such conditions was lower than the ICP detection limit(1 μg·L-1),and the contents of Cr(Ⅵ)and total chromium met the national standard(GB 5085.3-2007),which provided a new way for detoxification and resource utilization of COPR as well as effective leaching of pyrolusite.关键词
铬渣/软锰矿/解毒/水热/资源化Key words
chromite ore processing residue/pyrolusite/detoxification/hydrothermal/resource extraction分类
资源环境引用本文复制引用
谢雅骐,汪岚玢,杜亚光..软锰矿协同铬渣水热回收铬和锰[J].中南民族大学学报（自然科学版）,2024,43(1):16-23,8.基金项目
国家自然科学基金资助项目(52100206) （52100206）
