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宁南宽谷丘陵区土壤矿质元素与氧化铁的特征 被引量:15
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作者 郭曼 安韶山 +1 位作者 常庆瑞 李壁成 《水土保持研究》 CSCD 北大核心 2005年第3期38-40,共3页
以宁夏固原县上黄村和云雾山自然保护区为研究对象,通过大量的室内分析,研究其土壤中矿质元素的剖面分布状况及其氧化铁的分布特征。结果表明供试土壤土体中矿质元素的含量顺序依次为SiO2>Al2O3>CaO>Fe2O3>K2O≈MgO>TiO2... 以宁夏固原县上黄村和云雾山自然保护区为研究对象,通过大量的室内分析,研究其土壤中矿质元素的剖面分布状况及其氧化铁的分布特征。结果表明供试土壤土体中矿质元素的含量顺序依次为SiO2>Al2O3>CaO>Fe2O3>K2O≈MgO>TiO2>MnO2。其中硅、铝、铁的在剖面上分布较均匀,钙、镁、钾变异较大,空间分布不均;钛、锰空间变化较小,说明供试土壤处于物理风化阶段,土壤的化学风化程度较弱。氧化铁全量含量变化不大,其剖面各层的游离铁、活性铁和络合铁含量均不高,且空间变化幅度小,表明供试土壤的铁的淋溶状况不明显,土壤风化发育不好,释放出的氧化铁少。 展开更多
关键词 宁南宽谷丘陵区 土壤矿质全量 氧化铁特征
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Influence of coal blending on mineral transformation at high temperatures 被引量:14
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作者 BAI Jin LI Wen +2 位作者 LI Chun-zhu BAI Zong-qing LI Bao-qing 《Mining Science and Technology》 EI CAS 2009年第3期300-305,共6页
Transformation of mineral matter is important for coal utilization at high temperatures.This is especially true for blended coal.XRD and FTIR were employed together to study the transformation of mineral matter at hig... Transformation of mineral matter is important for coal utilization at high temperatures.This is especially true for blended coal.XRD and FTIR were employed together to study the transformation of mineral matter at high temperature in blended coals.It was found that the concentration of catalytic minerals, namely iron oxides, increases with an increasing ratio of Shenfu coal, which could improve coal gasification.The transformation characteristics of the minerals in blended coals are not exactly predictable from the blend ratio.This was proved by comparing the iron oxide content to the blending ratio.The results from FTIR are comparable with those from XRD.FTIR is an effective method for examining variation in mineral matter. 展开更多
关键词 coal blending high temperature mineral matter transformation
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