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Improving the sintering performance of blends containing Canadian specularite concentrate by modifying the binding medium

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International Journal of Minerals,Metallurgy and Materials 2018年第6期25卷 598-608页

作者： Feng Zhang De-qing Zhu Jian Pan Ya-ping Mo Zheng-qi Guo School of Minerals Processing and Bioengineering Central South University Changsha 410083 China Investment Management Department of Wuhan Iron and Steel Company Limited Wuhan 430083 China

Canadian specularite concentrate（CSC） possesses high total iron grade and low impurity content. However, due to the poor granulating performance and weak reactivity of CSC at high temperature, the proportion of CSC used in sintering blends is restricted. In this research, the effects of fine limonite, slake lime, and bentonite particles on the granulation performance of blends containing a high ratio of CSC were studied through granulation test. Based on the test results, the effects of modification of the binding medium on the sintering performance of blends containing a high ratio of CSC were revealed by the sintering pot test. Both the granulation property and sintering performance of blends with a high proportion of CSC were improved by modifying the binding medium.

关键词： iron ore binding medium specula^ite concentrate sintering performance

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Comparative analysis of eastern and western drying-oil binding media in polychromic artworks under the influence of pigments by pyrolysis-gas chromatography/mass spectrometry

Comparative analysis of eastern and western drying-oil bindi...

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第二十届全国色谱学术报告会及仪器展览会

作者： Na Wang Ling He Xiang Zhao Stefan Simon Department of Chemistry School of Science Xi'an Jiaotong University Institute for the preservation of cultural heritage Yale University

Eastern and western drying-oils used as binding mediain historical artworks are comparative identified by on-line methylated pyrolysis-gas chromatography/mass spectrometry(Py-GC/MS).Eastern raw tung-oil,boiled tung-oil,and western linseed-oil,poppy-oil,walnut-oil have been investigated based on the analysis of un-pigmented and pigmented reference samples treated by natural aging,hydro-thermal aging and UV aging,respectively.The characteristic pyrolysis products of all drying-oils are mono-carboxylic acids with the carbon number of6,14,16,18,20,di-carboxylic acids with the carbon number of 62,glycerol,erythritol,2-tridecanone,8-hydroxy-octanoic acid,3-octyl-oxiraneoctanoic acid and 2,6,10-trimethyl-9-undecenoic acid.Both benzene derivative and 9,10-dihydroxy-octadecanoic acid are suggested as the marked components for distinguishing eastern and westerndrying-oils.The investigated pigments of malachite,cinnabar,azurite and ochre have shown no obvious influence on the detection of characteristic pyrolysis products,but could accelerate the aging and hydrolyzing rate of drying-oil,especially cinnabar.The established on-line methylated pyrolys is-GC/MS procedure and summarized data have been successfully applied on the raw tung-oil and boiled tung-oil binding medium identif ication of historical polychromic samples collected from Drum Tower(Ming Dynasty),Bell Tower(Ming Dynasty),and Thousand-Buddha Cliff Grotto(Tang Dynasty).

关键词： Drying-oil Tung-oil binding medium Pigment Py-GC/MS.

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