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PVP对溶剂热合成FeS2(Pyrite)的形貌控制研究陈艳华1,2,姜传海2,郑毓峰1,孙言飞11. 新疆大学物理科学与技术学院2. 上海交通大学材料科学与工程学院摘 要:采用溶剂热合成技术,以FeSO4和(NH2)2CS为反应前驱物,在聚乙烯吡咯烷酮(PVP)作表面活性剂的醇-水体系中获得了晶粒完整的FeS2(Pyrite)粉体.借助X射线衍射(XRD)和透射电镜(TEM)对合成样品的晶相组成,分散性,形貌进行了分析与表征,结果表明,以PVP为表面活性剂可以显著提高产物的分散性,适当调节PVP的用量可以有效调控FeS2晶体的大小与形貌.关键词:FeS2(Pyrite);PVP;溶剂热;形貌控制;......
J. Cent. South Univ. (2020) 27: 1477-1483 DOI: https://doi.org/10.1007/s11771-020-4383-1 Changes of microbial diversity during pyrite bioleaching YIN Lu(殷璐), YANG Hong-ying(杨洪英), LI Xiang(李想), TONG..., but they are different from the original cells. Pyrite dissolution mainly occurs at the early and late stages with the decreasing of particle diameter, by 50% and 40%, respectively. The 16S rDNA gene......
; (6) First, n(Fe(II))/n(Fe(III)) of the acid leaching solution, obtained from pyrite cinders by sulfuric acid leaching, was adjusted to 0.08 by hydrogen peroxide... pyrite cinders as raw material. It is found that reaction temperature has a significant effect on the hematite crystal structure, size and shape. When the temperature is maintained at 140 °C for 0.5 h......
Interaction between pyrite and cysteine LIU Jian-she(柳建设), WANG Zhao-hui(王兆慧), LI Bang-mei(李邦梅), ZHANG Yan-hua(张艳华) School of Resources Processing and Bioengineering, Central South University...; Abstract: The adsorption mechanism of cysteine on pyrite was studied by amounts adsorbed, FTIR and XRD measurements. The results obtained......
Preparation of pre-reduced pellet using pyrite cinder containingnonferrous metals with high temperature chloridizing-reduction roasting technology-Effect of CaCl2 additiveCHEN Dong(陈栋)1, ZHU De-qing... on pelletizing, preheating and reduction were investigated. The results show that CaCl2 can improve the wet drop strength but reduces the thermostability of pyrite cinder green balls. When the dosage of CaCl2......
J. Cent. South Univ. (2012) 19: 1702-1710 DOI: 10.1007/s11771-012-1196-x Flotation and surface modification characteristics of galena, sphalerite and pyrite in collecting-depressing-reactivating... analyses on galena, sphalerite and pyrite have been carried out in a collecting-depressing- reactivating system (hereafter referred as the CDR system). In this system, sulfide minerals were first......
, micaceous iron oxide could be successfully prepared from pyrite cinders by hydrothermal method. Table 7 Quality of micaceous iron oxide prepared from pyrite cinders by hydrothermal method 4 Conclusions 1) The preparation of micaceous iron oxide from pyrite cinders was investigated by orthogonal experiments. The n(Fe2+)/n(Fe3+) and reaction temperature are leading factors influencing......
J. Cent. South Univ. Technol. (2008) 15: 49-53 DOI: 10.1007/s11771-008-0011-1 Interfacial interaction of bio-leaching of pyrite mineral GU Guo-hua(顾帼华)1, WANG Hui(王 晖)2, SUO Jun(锁...; Abstract: Electrokinetic and contact angle measurements were used to discuss the interfacial interaction on bio-leaching of pyrite mineral. Surface energy parameters of pyrite......
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