共搜索到213条信息,每页显示10条信息,共22页。用时:0小时0分0秒546毫秒
; Preparation of jarosite by Acidithiobacillus ferrooxidans oxidation LIU Jian-she(柳建设), LI Bang-mei(李邦梅), ZHONG De-yi(钟得意), XIA Le-xian(夏乐先), QIU Guan-zhou(邱冠周) (School of Mineral Processing and Bioengineering, Central South University, Changsha 410083, China) Abstract: The formation of jarosite in the presence of Acidithiobacillus ferrooxidans (A. ferrooxidans......
mainly as jarosite. The results show that low pulp content increases the leaching rate of iron. The inoculation amount from 1×107 cell/mL to 1×108 cell/mL has positive effects on the leaching rate.../L ferrous sulfate was added. Comparatively, addition of ferric sulfate (2 g/L) significantly inhibits the bioleaching process. At the end of bioleaching, jarosite and sulfur are observed......
......
Trans. Nonferrous Met. Soc. China 26(2016) 557-564 Catalytic performance of biological method seeds on jarosite process Hai-jun LI, Hong-ying YANG, Guo-bao CHEN School of Materials and Metallurgy, North Eastern University, Shenyang 110819, China Received 23 March 2015; accepted 13 October 2015 Abstract: The catalytic performance on jarosite process of jarosite seeds via biosynthesis and chemical......
Comprehensive recovery of lead, zinc, and iron from hazardous jarosite residues using direct reduction followed by magnetic separationYa-yun Wang1,2,Hui-fen Yang1,2,Bo Jiang1,2,Rong-long Song1,2,Wei..., University of Science and Technology Beijing摘 要:Lead, zinc, and iron were recovered from jarosite residues using direct reduction followed by magnetic......
......
to the change of leaching conditions. The copper leaching efficiency was increased from 50% to 89.8% through adding beads. The SEM and X-ray diffraction (XRD) analyses illustrate that there are few jarosite precipitates and weak passivation on the surface of chalcopyrite in strengthening leaching. In contrast, there are thick and compact jarosite precipitate and obvious passivation in ordinary leaching......
......
from 1.6 to 2.5 have a little effect on the final leaching rate. The results also imply that Fe3+ ions are important for bioleaching of chalcopyrite. At the end of bioleaching, jarosite and sulfur are observed on the surface of chalcopyrite residues by using XRD, SEM and EDS. With the passivation layer formed by jarosite and sulfur, the continuous copper extraction is effectively blocked. Key words......
Trans. Nonferrous Met. Soc. China 24(2014) 1152-1160 Formation of jarosite and its effect on important ions for Acidithiobacillus ferrooxidans bacteria B. NAZARI1, E. JORJANI1, H. HANI1, Z. MANAFI 2... Iranian Copper Industries Company, Iran Received 13 June 2013; accepted 5 February 2014 Abstract: The precipitation of jarosite adversely affects the bio-leaching of copper sulfides in the Sarcheshmeh......