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of microstructural properties involving the conversion of goethite to hematite and the increase in surface area and porosity as evident from X-ray diffraction(XRD),thermogravimetry-differential thermal analysis(DTTGA......
that the nickel laterite ore contains a total iron content of 22.50wt% and a total nickel content of 1.91wt%. Its mineral composition mainly consists of serpentine, hortonolite, and goethite. During......
on phosphorus removal via leaching has been investigated for high-phosphorus iron ore. The findings indicate that phosphorus in the ore is associated with goethite and exists mainly in amorphous Fe3PO7 phase......
铁氧化物生物多孔陶粒的制备工艺及性能鲍腾,陈冬,陈天虎,庆承松,朱晓合肥工业大学资源与环境工程学院摘 要:以针铁矿(Goethite,GT),锯末(成孔剂)和凹凸棒石黏土(粘结剂)为原料,在空气气氛下煅烧,制备出符合国家水处理标准的铁氧化物生物多孔陶粒(Iron Oxide-based Porous Ceramsite,IPC).利用所制备IPC的抗压强度作为评价IPC质量的指标,通过单因素实验,正交实验来优化IPC的物料配比和煅烧工艺,并通过XRD,SEM,偏光显微镜(Polarizing Microscope-PM),比表面积(BET-SSA)等技术来表征IPC孔结构特征及其特性.结果表明:IPC材料的孔连通性好,大孔孔径为1020μm,抗压强度达到5178N,比表面积为79m2/g,是一种以开放......
-stage corrosion process of the mill-scaled pipeline steel surface. The first stage included an initial preferential dissolution of goethite(?-FeOOH) and lepidocrocite(?-FeOOH) in mill scale......
was basic Natash flows.The presence of gypsum,hematite,goethite,calcite and kaolinite indicated that,the Natash laterites were related to tropical weathering conditions.The presence of ilmenorutile......
that the dehydration of free water, the decomposition of goethite and the dehydroxylation reaction of kaolinite and serpentine as well as the second period reaction of dehydroxylation for serpentine mineral all take......
components of the rust are goethite, akageneite, lepidocroeite, hematite, maghemite, magnetite and wustite. Several smaller pits lying in a larger pit and some islet-like dissipated iron particles......
, goethite, and gibbsite are the dominant mineral phases with minor amounts of hematite, kaolinite, and quartz. The sample contained 34.22wt% chromite, and chromite liberation is more than 80% for grains......
/XEDS) show that goethite is the major Ni-bearing mineral, and chromite is the minor one. Experimental results show that the leaching rates of Cr, Al, and Si are 95.6wt%, 83.8wt%, and 40.1wt......
