赤铁矿

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Higher anhydrite and hematite content and lower portlandite content would result in lower ash fusion temperature.

一般情况下，煤灰中氢氧钙石含量低，硬石膏和赤铁矿含量高的煤，灰熔融温度较低。

As the temperature increases, content of quartz, anhydrite, and hematite in coal ash decrease in reducing conditions and some new mineral phases are formed during heating process. The content of mullite formed in the heating process is the mayor reason of high melting temperature of the ash. Anorthite at high temperature lowers the ash fusion temperature.

随着温度的升高，煤灰中石英、硬石膏、赤铁矿等结晶矿物含量逐渐减少，生成新的矿物质，莫来石的生成是导致淮南煤灰熔点高的主要原因，钙长石起到降低灰熔点的作用。

The second one exists in crystal lattice of pyrite, arsenopyrite and hematite.

裂隙金 产于石英、赤铁矿和黄铜矿等矿物裂隙之中；c。

Most of them are painted red with bloodstone powder and ox blood.

南系岩画大都以红色涂绘，颜料是以赤铁矿粉调合牛血等而成的。

A variety of chert containing magnetite and hematite; mined as a low-grade iron ore.

一种含磁铁矿和赤铁矿的燧石，作为一种低等的铁矿石被开采。

Minor element discrimination indices for residual primary sulfides (pyrite, pyruhotite, chalcopyrite, sphalerite, galena, etc.) and supergene ore minerals goethite, hematite, manganiferons minerals, covellite, native gold, clay minerals, quartz, etc.

还给出了残余原生硫化物(黄铁矿、磁黄铁矿、黄铜矿、闪锌矿、方铅矿等)和表生矿物(针铁矿、赤铁矿、锰矿物、铜蓝、自然金、粘土矿物、石英等)的微量元素评价标志。

Above the glacial layers sits a red sandstone containing hematite—a mineral that forms only under oxygen-rich skies. Hematite has also been found at the landing site of the Mars rover Opportunity.

覆盖于冰期地层上方的砂岩，则含有只在含氧丰富的环境中才会形成的赤铁矿（火星巡迴者机会号探测车的著陆点亦发现赤铁矿的存在，然因颗粒较粗，故呈灰色。

It is shown that the formation process of iron carbide converted from hematite using H〓-CH〓 mixtures consists of several steps: reduction of iron ore, cracking of methane, and carburization of metallic iron.

试验发现赤铁矿与H〓-CH〓气反应制备碳化铁的过程是分步完成的，第一步是赤铁矿的还原，第二步是甲烷的裂解，然后是金属铁的碳化。

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。

The absorption and distribution of chromium were studied in ryeusing nutrient culture technique and pot experiment.

采用不同浓度K2CrO4(0，0.4，0.8和1.2 mmol/L)的Hoagland营养液处理黑麦幼苗，测定铬在黑麦体内的亚细胞分布、铬化学形态及不同部位的积累。

By analyzing theory foundation of mathematical morphology in the digital image processing, researching morphology arithmetic of the binary Image, discussing two basic forms for the least structure element: dilation and erosion.

通过分析数学形态学在图像中的理论基础，研究二值图像的形态分析算法，探讨最小结构元素的两种基本形态：膨胀和腐蚀；分析了数学形态学复杂算法的基本原理，把数学形态学的部分并行处理理念引入到家实际应用中。