利用污水污泥通过热解工艺修复铬铁矿选矿残渣。
Remediation of chromite ore processing residue by pyrolysis process with sewage sludge.
作者信息
Zhang Dalei, Kong Hainan, Wu Deyi, He Shengbing, Hu Zhanbo, Hu Xiaofang
机构信息
School of Environmental Science and Engineering, Shanghai JiaoTong University, Shanghai 200240, China.
出版信息
Bioresour Technol. 2009 Jun;100(11):2874-7. doi: 10.1016/j.biortech.2009.01.003. Epub 2009 Feb 13.
The present work developed a novel technique to treat chromite ore processing residue (COPR). The process involved mixing the COPR with sewage sludge followed by pyrolysis. The gaseous organic fraction generated during pyrolysis of sludge was beneficial to Cr(VI) reduction. Process variables, such as the amount of sludge added to COPR (sludge-to-COPR (S/C) ratio), heating temperature, reaction time and particle size, were systematically varied, and their influences on the Cr(VI) reduction in COPR were investigated. Cr(VI) content had decreased greatly, from 3384 mg kg(-1) for untreated COPR to less than 30 mg kg(-1) for COPR treated at 600 degrees C.
本研究开发了一种处理铬铁矿加工残渣（COPR）的新技术。该工艺包括将COPR与污水污泥混合，然后进行热解。污泥热解过程中产生的气态有机部分有利于Cr(VI)的还原。系统地改变了工艺变量，如添加到COPR中的污泥量（污泥与COPR的比例（S/C））、加热温度、反应时间和颗粒大小，并研究了它们对COPR中Cr(VI)还原的影响。Cr(VI)含量大幅下降，从未处理的COPR的3384 mg kg(-1)降至600℃处理的COPR的30 mg kg(-1)以下。
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