摘要
电解锰渣产量大、含污染性物质,当前处理方式主要为渣库堆存,带来一定的安全环保隐患,制约我国锰产业的高质量发展。为开发电解锰渣无害化处理工艺,分别采用直接焙烧和添加碱性添加剂协同中温焙烧工艺处理电解锰渣,系统考察了焙烧温度、焙烧时间、添加剂掺入量等因素对焙烧渣水溶锰、水溶性盐、氨氮、有机质含量的影响。结果表明,直接焙烧时,焙烧产物中水溶锰、水溶性盐含量仍较高,氨氮、有机质明显降低;掺入碱性添加剂焙烧时,水溶锰、水溶性盐固化及氨氮、有机质脱除效果显著,在焙烧温度600℃、焙烧时间100 min、碱性添加剂掺入量为10%的最佳条件下,焙烧样中水溶锰为0.21μg/L、水溶性盐质量分数为1.91%、氨氮含量为3.36 mg/L、有机质为1.95%,达到《一般工业固体废物贮存和填埋污染控制标准》(GB 18599—2020)中对进入Ⅰ类堆场的一般工业固体废物要求。电解锰渣直接中温焙烧难以实现无害化,掺入碱性添加剂中温焙烧后可实现无害化处理。本研究对降低电解锰渣污染风险,实现安全处置具有一定的指导作用。
Electrolytic manganese residue is generated in large quantities and contains various pollutant substances.The primary disposal method involves stockpiling in slag repositories,which poses significant safety and environmental hazards and restricts the high-quality development of manganese industry in our country.In this paper,in order to exploit the hazard-free treatment of electrolytic manganese residue,the electrolytic manganese residue was disposed harmlessly through direct roasting and adding the alkaline additive combined with roasting under middle temperature,the effect of roasting temperature,roasting time and content of additive on water soluble manganese,water soluble salt,ammonia nitrogen and organic content in slag were discussed.The results shows that during direct roasting,the contents of water soluble manganese and water soluble salt in the products were still high,while the contents of ammonia nitrogen and organic matter were significantly reduced.When alkaline additives were added for roasting,the solidification of water-soluble manganese and water-soluble salts,as well as the removal of ammonia nitrogen and organic matter,were significantly effective.Under the optimal conditions of roasting temperature of 600℃,roasting time of 100 min,and alkaline additive dosage of 10%,the water-soluble manganese in the roasted sample is 0.21μg/L,the water-soluble salt content was 1.91%,the ammonia nitrogen content was 3.36 mg/L,and the organic matter was 1.95%,meeting the requirements for general industrial solid waste entering ClassⅠstorage yard in the“General Industrial Solid Waste Storage and Landfill Pollution Control Standards”(GB 18599—2020).Direct middle temperature roasting of electrolytic manganese slag was difficult to achieve harmless treatment,but adding alkaline additives for medium temperature roasting could achieve harmless treatment.The research has a certain guiding role in reducing the pollution risk of electrolytic manganese slag and achieving safe disposal.
作者
陈沪飞
张茂
杨博
王东
康凯
彭艳枚
CHEN Hufei;ZHANG Mao;YANG Bo;WANG Dong;KANG Kai;PENG Yanmei(Guizhou Kingray New Materials Co.Ltd.,Tongren 554300,Guizhou,China;Changsha Research Institute of Mining and Metallurgy Co.Ltd.,Changsha 410012,China)
出处
《矿冶》
CAS
2024年第5期774-782,共9页
Mining And Metallurgy
基金
国家重点研发计划项目(2022YFC3901204)
铜仁市科技计划项目([2023]71号)。
关键词
电解锰渣
中温焙烧
固化
杂质脱除
无害化处理
electrolytic manganese residue
middle temperature roasting
immobilize
impurity removal
harmless treatment
