1·Oxidation roasting was a pretreatment technique for low-grade and complex siderite, the parameters of oxidation roasting were important to roasting efficiency.
氧化焙烧是解决低品位复杂难选菱铁矿的有效前处理工艺，氧化焙烧参数对焙烧效果影响很大。
2·And then studied the origin and lithofacies meaning of siderite.
在此基础上研究了菱铁矿的成因和岩相意义。
3·The analysis of the iron bearing mineral compositions indicates that the major iron bearing minerals in the rocks are magnetite, maghemite, hematite, pyrite and siderite.
矿物成分分析显示，岩石中主要含铁矿物为磁铁矿、磁赤铁矿、赤铁矿、黄铁矿和菱铁矿。
4·From microscopic examination of rocks and minerals, the author analyzed morphological characteristics and occurrence status of siderite in Tongziyan Formation, Longyong Coalfield.
从岩矿镜下鉴定资料入手，分析了龙永煤田童子岩组菱铁矿的形态特征和赋存状况。
5·The composition analysis of five-component mixed minerals of siderite, kaolinite, dolomite, calcite and quartz has been analyzed inN_2.
在n_2气下对配合的菱铁矿、高岭石、白云石、方解石、石英五元混合矿物的组成进行了分析。