磁铁矿

In the paper the authors focus on a preliminary evaluation of magnetite and cupreous magnetite at Sangqiongle and specularite at Liema.

重点对桑穷勒磁铁矿，含铜磁铁矿及列马镜铁矿进行了初步评价。

In DS 4J, the negative relationship of Ti and Fe is observed, and Mn, Si, Al and Ca elements are often found in the magnetic minerals, and a lot of goethite and limonite minerals, as well as magnetic mineral corrosion and some neogenic magnetic minerals are also found.

DS-4J样的磁性矿物中Fe与Ti元素呈明显的负线性相关关系，Si、Al、Ca的含量较高，矿物以磁铁矿、赤铁矿、针铁矿和褐铁矿为主，并明显见有磁性矿物被溶蚀和新生的磁铁矿。

In this paper, the magnetite purification and two methods for obtaining ultrafine magnetite powder were introduced.

介绍了磁铁矿的选矿提纯方法和获得磁铁矿超细粉的两种途径。

The results show that the perfect strength can be obtained under oxygen partial pressure about 20% O2, overhigh or low oxygen partial pressure is unfavorable for recrystallization of Fe2O3, which causes a decrease of pellet strength. The original hematite will be transformed into magnetite on reduction firstly when carbon-burdened hematite pellet is roasted in oxidizing atmosphere, and then the magnetite will be oxidized to secondary hematite, which is more active than original hematite, therefore, the induration strength of pellet is able to be enhanced.

研究结果表明：内配碳赤铁矿氧化球团在接近空气配比(氧含量约20%，体积分数)的氧化性气氛中焙烧强度最大，氧含量过高或过低都会影响Fe2O3的再结晶，使球团强度降低；在氧化性气氛中焙烧含碳赤铁矿球团时，原生赤铁矿先还原为磁铁矿，磁铁矿再氧化成活性较高的次生赤铁矿，提高了赤铁矿焙烧固结性能和球团强度。

The feature of oxygen isotope for magnetite from Abagong iron deposit reflects that the water in the fluid of mineralization resides in the initial magma, implying the magma genesis of mineralization. The similaritary features of REE and trace elements for coexisting apatite with magnetite in the Abagong, the Kiruna type and the Ninwu porphyrite iron deposit show their common genesis, indicating that Abagong iron deposit resulted from the intrusion of late ore magma due to the magma differentiation. The characteristic of sulfur isotope composition implies that the Abagong iron deposit resides in basaltic magma from mantle resource.

阿巴宫铁矿磁铁矿氧同位素特征反映了成矿流体中水来源于原始岩浆水，暗示该铁矿的岩浆成因；与磁铁矿共生的磷灰石稀土和微量元素特征与Kiruna型铁矿以及宁芜玢岩铁矿中磷灰石特征非常相似，表明它们具有相同的成因机理，反映出阿巴宫铁矿为岩浆分异的晚期矿浆贯入式成因；其硫同位素特征表明成矿物质源自幔源的玄武质岩浆。

Ore structures appeared euhedral and subhedral granular, polygonal cleavage, anhdral granular and sheet texture.

矿石构造主要出现致密块状矿石，条带状磁铁矿和浸染状磁铁矿；矿石结构包括自形、半自形粒状结构，多边形解理结构、他形粒状结构和片状结构(1∶20万富蕴幅，1978)。

This thesis has systematically studies the microstructure of the sinter bearing fluorine of different compositions and in different sintering condition.(1) The main units of the Low Fluorine Sinter are magnetite、hematite、 SFCA、larnite、glass and pore. The cuspidine doesn't form for the low content fluorine, and the fluorine is in glass; Sinter basicity dominates the forming of the larnite and SFCA, when basicity is between 1. 72 and 1. 96, there are more larnites in the binder phase, and when the basicity is biger than 1. 96, there are more SFCA in the binder phase; the hematite appears like magnetite and usually is around pore.

为此，本文对不同组成、不同烧结条件的烧结矿样品进行了系统的显微分析和研究，其主要内容包括：(1)构成低氟烧结矿的主要组元有磁铁矿、赤铁矿、铁酸钙、硅酸二钙、玻璃体和气孔，由于含氟量的降低，枪晶石等含氟矿物并未形成，氟分布在后期凝固的玻璃体中，其中硅酸二钙和铁酸钙受碱度影响较大，硅酸二钙在碱度为1.72～1.96范围内形成较多，铁酸钙在碱度大于1.96含量增多，赤铁矿呈磁铁矿假象，多分布在气孔周围，各组元的生成顺序为：磁铁矿—硅酸二钙—铁酸钙—玻璃体。

There are three effects that may be important in producing this trend. First, lowtemperature oxidation preferentially affects the finer single-domain magnetites responsible for the Hopkinson peak, which is therefore suppressed in the more oxidized loams. Second, the possible production of uniaxial magnetite with shape anisotropy can also lead to a relatively muted Hopkinson peak. There is, additionally, a third alternative, and the one preferred here, that the natural alteration processes involved in pedogenic susceptibility enhancement have probably depleted the supply of ironbearing precursor phases, so that less new magnetite is formed on heating.

产生这种特殊热磁性质的可能原因如下：第一，成土过程中的低温氧化作用减弱了磁铁矿的Hopkinson效应；第二，可能是成土过程中生成的一向延长的针状磁铁矿颗粒表现出较弱的Hopkinson效应；第三，随着成土作用增强，现代黄土、黑垆土中的硅酸盐、粘土矿物因受土壤化作用分解而越来越少，加热过程中分解产生的磁铁矿造成的磁化率增强相对于其初始磁化率也就越来越小，从而产生越来越弱的Hopkinson/alteration峰，本文认为这是最主要的原因。

During the study of magnetite oxidation, a function for calculating the"equivalent osmosing thickness"of oxygen through the reacted product layer covered the unreacted part is put forward based on the oxidation process properties. It is this function that make the oxidation process model successful.

在球团矿内磁铁矿的氧化过程的研究中，作者针对磁铁矿粉氧化的特点，提出了磁铁矿颗粒表面生成的三氧化二铁产物层的当量扩散厚度的计算函数，将其引入全温度范围球团矿内磁铁矿的氧化过程模型，并获得成功。

Because there are incompletely cleavages in Jidong magnetite concentrate grain, and octahedron crack exists in magnetite crystal, oxidation develops along octahedron crack or cleavage seam, strip oxidation or reticulation texture is formed, and then magnetite is oxidized to hematite completely.

由于冀东磁铁矿自身的特点，氧首先吸附在颗粒表面的解理缝周围，并与解理缝周围的磁铁矿反应形成针状或片状赤铁矿；然后氧化过程沿磁铁矿的八面体或解理缝继续发展，形成条状或网状结构的赤铁矿，最终完全氧化。

Neither the killing of Mr Zarqawi nor any breakthrough on the political front will stop the insurgency and the fratricidal murders in their tracks.

在对危险的南部地区访问时，他斥责什叶派民兵领导人对中央集权的挑衅行为。

In fact,I've got him on the satellite mobile right now.

实际上 我们已接通卫星可视电话了