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44280, Turkey Received 8 January 2014; accepted 19 May 2014 Abstract: The adsorption of copper ions was investigated using pyrolusite ore as a low-cost alternative adsorbent source. Pyrolusite, which.../L, respectively, the efficiency of copper adsorption on pyrolusite ore was 96.5%. The isotherm and kinetic studies relating to this adsorption process were also made. It was determined......
, a response surface methodology was used to optimize the electroleaching of Mn from low-grade pyrolusite. Ferrous sulfate heptahydrate was used in this reaction as a reducing agent in sulfuric acid solutions. The effect of six process variables, including the mass ratio of ferrous sulfate heptahydrate to pyrolusite, mass ratio of sulfuric acid to pyrolusite, liquid-to-solid ratio, current density......
Fluidized roasting reduction kinetics of low-grade pyrolusite coupling with pretreatment of stone coalYa-li Feng1,Zhen-lei Cai1,Hao-ran Li2,Zhu-wei Du2,Xin-wei Liu11. School of Civil..." name="ChDivSummary">Based on the fluidized roasting reduction technology of low-grade pyrolusite coupling with pretreatment of stone coal, the manganese reduction efficiency was investigated......
Reductive leaching of manganese from low-grade pyrolusite ore in sulfuric acid using pyrolysis-pretreated sawdust as a reductantYa-li Feng1,Shi-yuan Zhang1,2,Hao-ran Li21. School of Civil...="ChDivSummary" name="ChDivSummary">Manganese(Mn) leaching and recovery from low-grade pyrolusite ore were studied using sulfuric acid(H2SO4) as a leachant and pyrolysis-pretreated sawdust as a reductant......
; 文献标志码:A Reductive leaching and leaching kinetics of low-grade pyrolusite ores using oat straw as reductant MAN Rui-lin, CHANG Wei, WU Qi, XUE Jian-rong (School of Chemistry and Chemical Engineering, Central South University, Changsha 410083, China) Abstract: The extraction of manganese from low-grade pyrolusite ore was investigated......
;Chemical compositions of pyrolusite(mass fraction,%) 图1 软锰矿的XRD谱 Fig. 1 XRD pattern of pyrolusite 表2 软锰矿中锰的物相 Table 2 Phase analysis of manganese in manganese ore 试验所用的焦化废水取自河...浸出率随平均粒径的减小而增大,这主要是由于有机物与软锰矿接触面积增大,扩散层变薄,促进了反应的进行[22]. 表4 不同粒级的锰元素分布 Table 4 Manganese mass content of different particle size range of pyrolusite 图7 不同粒径时锰浸出率随时间的变化 Fig. 7 ......
利用软锰矿进行烧结烟气脱硫的反应机理研究吴复忠1,李军旗1,金会心1,蔡九菊2(1.贵州省贵阳市贵州大学材料科学与冶金学院2.东北大学 国家环境保护生态工业重点实验室,辽宁沈阳 110004)摘 要:应用化学热力学软件分析了软锰矿浆脱硫的反应机理,并进行了实验验证,确定该体系的反应有2种途径:MnO2与SO2直接发生氧化还原反应生成MnSO4,反应式为MnO2+SO2=MnSO4,是脱硫体系的主要反应;SO2被氧化成SO3后,与H2O生成H2SO4,反应式为SO2+1/2O2+H2O=H2SO4,是脱硫体系的副......
Galena-pyrolusite co-extraction in sodium chloride solution and its electrochemical analysis LONG Huai-zhong(龙怀中)1, CHAI Li-yuan(柴立元)1, QIN Wen-qing(覃文庆)2 1. School of Metallurgical Science...; Abstract: The co-extraction behavior of galena-pyrolusite in a sodium chloride solution and the electrochemical mechanism of this process were investigated, and some factors affecting the leaching rate of Pb......
Trans. Nonferrous Met. Soc. China 26(2016) 2479-2484 Enhancement of bio-oxidation of refractory arsenopyritic gold ore by adding pyrolusite in bioleaching system Xu ZHANG1,2, Ya-li FENG1, Hao-ran LI2... Engineering, Chinese Academy of Sciences, Beijing 100190, China Received 28 August 2015; accepted 14 June 2016 Abstract: Pyrolusite was added in the bioleaching process to enhance the bio-oxidation process......