共搜索到86条信息,每页显示10条信息,共9页。用时:0小时0分0秒406毫秒
structure, pyrolusite with 1×1 tunnel structure; coronadite and cryptomelane with 2×2 tunnel structure; todorokite with 3×3 tunnel structure. The metal ions enter the manganese oxide lattice......
......
, fertilizers, cells and fine chemicals [1]. Pyrolusite is the most important mineral of manganese. Hydrometallurgical treatment is one of the processes that can be used for enrichment of pyrolusite..., and other recovery processes [2,3]. Acid sulfuric and different reducing agents have been used for leaching of pyrolusite. The most important reducing agents include ferrous iron solution [4......
, XUE Jian-rong. Reductive leaching and leaching kinetics of low-grade pyrolusite ores using oat straw as reductant[J]. The Chinese Journal of Nonferrous Metals, 24(8): 2158-2163. [7] 牛莎莎, 王志兴, 郭华军, 李... manganese anode slag[J]. The Chinese Journal of Nonferrous Metals, 2012, 22(9): 2662-2666. [8] EKMEKYAPAR A, ASIN C, DEMIRKIRAN N, K?NK?L A. Reductive leaching of pyrolusite ore by using sawdust......
cornstalk as reductant[J]. Hydrometallurgy, 2009, 96(1/2): 176-179. [4] 李同庆. 低品位软锰矿还原工艺技术与研究进展[J]. 中国锰业, 2008, 26(2): 4-14. LI Tongqing. Technology of low grade pyrolusite ore reduction process.... Thermodynamic analysis of interactive roasting process of bismuth sulfide ore and pyrolusite[J] Journal of Central South University (Science and Technology), 2013, 44(10): 3984-3990. [6] DING Fenghua......
, %) Chemical composition of zinc sulfide concentrates used as reduction agent is listed in Table 4. The content of Mn in pyrolusite, used as manganese resource and oxidation agent, is 38.65%. Table 3 Phase... with pyrolusite, removing copper with iron powder, contained a temperature adjustable magnetic KHCB-3 stirrer, which has a deviation of 1.5 ℃, a 500 mL-flask for conditional experiments and a 5 000 mL-flask......
University Press, 1993. 18-37. [4] Recap Z, Mufide B. Recovery of MnSO4 from low-grade pyrolusite ores, and of MnSO4 and silver from manganese-silver ores[J]. Separation Science and Technology, 1996, 30(3..., 22(2): 35-37. HE Zhou-chu, PENG Ai-guo, ZHENG Xian-fu, et al. A study on the two-ores method of leaching low grade pyrolusite[J]. China Manganese Industry, 2004, 22(2): 35-37. [9] 杨幼平, 黄可龙. 植物粉料--硫......
and pyrolusite through isomorphism, only a small fraction of the silver presents in individual minerals[1]. Method to recover silver from silver-manganese ore considerably depends on the grades of Ag and Mn.... Neither cyanide leaching nor flotation is an effective process to recover silver from this ore, because nearly 91.50% of the silver is disseminated in psilomelane and pyrolusite, and remained 8.50......
of EMD belongs to γ-MnO2 type, which features in the disordered alternate growth of the unit cells of pyrolusite and ramsdellite [13] (shown in Fig. 2). The structure of A-EMD in Fig. 1 shows no change after acid treating and belongs to typical γ-MnO2 type. But the structure of H-EMD, indicated as pyrolusite- MnO2, shows great change. The 2θ=22.1° peak shifts from low angle to high angle......
of manganese from pyrolusite ore by sulfuric acid and hydrogen peroxide[J]. International Journal of Mineral Processing, 2011, 100: 116-123. [2] Hazek E, Lasheen M N, Helal T A, et al. Reductive leaching.... [13] Cai Z, Feng Y, Li H, et al. Co-recovery of manganese from low-grade pyrolusite and vanadium from stone coal using fluidized roasting coupling technology[J]. Hydrometallurgy, 2013, 131: 40-45. [14......