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Production of pig iron from red mud waste fines using thermal plasma technology

International Journal of Minerals,Metallurgy and Materials 2012年第8期19卷 679-684页

作者： K. Jayasankar P.K. Ray A.K. Chaubey A. Padhi B.K. Satapathy P.S. Mukherjee CSIR-Institute of Minerals & Materials Technology Bhubaneswar India National Aluminum Company Ltd. Bhubaneswar India

Red mud, an insoluble residue produced during alkali leaching of bauxite, is considered as a low-grade iron ore containing 30% to 50% iron. The present paper deals with the use of thermal plasma technology for producing pig iron from red mud waste fines. The smelting reduction of red mud was carried out in a 35 kW DC extended arc thermal plasma reactor. Red mud was properly mixed with fluxes and graphite （fixed carbon, 99%） as a reductant as per stoichiometric requirement. The effect of various process parameters like a reductant, fluxes and smelting time on iron recovery was studied and optimized. An optimum condition for the maximum recovery of iron was obtained. A new thermal plasma process applicable to direct iron making from red mud waste fines that would achieve significant utilization of red mud was proposed.

关键词： pig iron waste utilization red mud smelting dolomite limestone thermal plasma

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iron extraction from lead slag by bath smelting

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Transactions of Nonferrous Metals Society of China 2017年第8期27卷 1862-1869页

作者： Yan-chun LI Ying-zhen YUAN Hui LIU Bing PENG Zhi-lou LIU School of Metallurgy and Environment Central South University Changsha 410083 China Chinese National Engineering Research Centre for Control and Treatment of Heavy Metal Pollution Central South University Changsha 410083 China

A new bath smelting process was proposed to recover iron for solid wastes reduction.99.79%of iron metallization,99.61%of iron recovery,pig iron with93.58%Fe,0.021%S,0.11%P,1.38%C,0.22%Si,0.01%Pb and0.031%Zn were achievedafter the wastes were smelted at1575°C for20min under C/Fe molar ratio of1.6and basicity *** produced pig iron could beused in *** study provides a way for recycling iron from smelting slag and hydrometallurgical residue.

关键词： lead slag iron extraction bath smelting pig iron

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Recovery of Fe,V,and Ti in modified Ti-bearing blast furnace slag

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Transactions of Nonferrous Metals Society of China 2022年第1期32卷 333-344页

作者： Ji-qing HAN Jing ZHANG Jia-hao ZHANG Xiao CHEN Li ZHANG Gan-feng TU School of Metallurgy Northeastern UniversityShenyang 110819China School of Materials Science and Engineering Northeastern UniversityShenyang 110819China

A two-stage oxidation—alkali leaching—acid leaching method was proposed to recovery Fe,V,and Ti in modified Ti-bearing blast furnace *** optimal experiment conditions of iron extraction were one-stage oxidation time 40 s and holding time 8 *** recovery rate of iron was 89.93%.The optimum experiment conditions of vanadium extraction were total oxidation time of 126 s,NaOH concentration of 4.0 mol/L,leaching temperature of 95℃,leaching time of 90 min,and the number of cycle was *** leaching rate of vanadium was 92.13%.The optimal experiment conditions of titanium extraction were HCl concentration of 4.5 mol/L,leaching temperature of 75℃,and leaching time of 90 *** TiO_(2)content of synthetic rutile was 98.61%.

关键词： Ti-bearing blast furnace slag oxidation modification leaching synthetic rutile pig iron

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