Harmless Impact of Electrolytic Manganese Residue by Low Temperature Thermochemical Method with Carbide Slag  

作　　者：XIE Zhihan LIU Rongjin LU Fuhua JING Daiyan ZHAO Yanrong LIANG Jianbo HUANG Wanyu CHEN Tingchao 谢智涵;刘荣进

机构地区：[1]College of Material Science and Engineering,Guilin University of Technology,Guilin 541004,China [2]Collaborative Innovation Center for Exploration of Nonferrous Metal Deposits and Efficient Utilization of Resources in Guangxi,Guilin University of Technology,Guilin 541004,China [3]Key Laboratory of New Processing Technology for Nonferrous Metal&Materials,Ministry of Education,Guilin University of Technology,Guilin 541004,China [4]Guangxi Engineering and Technology Center for Utilization of Industrial Waste Residue in Building Materials,Guilin 541004,China

出　　处：《Journal of Wuhan University of Technology(Materials Science)》2025年第2期400-411,共12页武汉理工大学学报(材料科学英文版)

基　　金：Funded by the Guangxi Key Research and Development Program(Guike AB23026071 and Guike AB24010020);the Guangxi Science and Technology Base and Talent Project(Guike AD24010062);the Guangxi Beibu Gulf Engineering Research Center for Green Marine Materials。

摘　　要：This study introduced a low-temperature thermochemical method for the treatment of EMR in the presence of carbide slag(CS)to achieve an economical and efficient harmless effect.The experimental results indicate that,under suitable conditions,the NH_(4)^(+)and Mn^(2+)contents in EMR decrease notably with the increasing CS content,accompanied by an increase in pH value.Furthermore,the concentration of NH_(4)^(+)in EMR considerably decreases with the increasing liquid-to-solid ratio,eventually stabilizing.Similarly,the pH value first increases and then decreases,ultimately stabilizing.At a CS content of 12%and a liquid-to-solid ratio of 0.7,the leaching concentrations of NH_(4)^(+)and Mn^(2+)in EMR(127.7 mg/kg and 0.15 mg/L,respectively)fall below the standard detection limit(2 mg/L),with the pH measuring 8.26,meeting the conditions outlined in the GB 8978.NH_(4)^(+)is converted to NH_(3),while Mn^(2+)is transformed into solid precipitates such as Mn(OH)_(2),Mn_(2)O_(3),MnO_(2),Ca_(3)Mn_(2)O_(7),and Ca_(2)MnO_(4).The majority of manganese ions exist in trivalent or tetravalent states and remain stable over time.The cost of using CS as a reagent for treating 1 ton of EMR is merely$1.01.The high OH^(-)concentration provided by CS enables the effective removal of NH_(4)^(+)from EMR and the solidification of Mn^(2+)during thermal reactions.

关 键 词：low-temperature thermochemistry electrolytic manganese residue carbide slag harmless treatment soluble manganese ammonium ion 

分 类 号：TG1[金属学及工艺—金属学]