本文从生产型煤和型焦的需要出发，研究岩浆变质作用所形成的天然焦炭和高、中变质煤的显微结构。
The paper studies the microstructures of the cokeite and the high, middle metamorphic coal, formed by the metamorphism of magma in view of the need for producing moulding coal and coke.
将十三种矿物质（氧化物）添加到煤中炭化，用光学显微镜和X射线衍射方法研究矿物质的存在对所得焦炭显微结构的影响。
The effects of minerals (oxides) on coke microstructure are studied by adding 13 types of different oxides into coal to carbonize using optical microscopy and X-ray powder diffraction.
将十三种矿物质（氧化物）添加到煤中炭化，用光学显微镜和X射线衍射方法研究矿物质的存在对所得焦炭显微结构的影响。
The effects of minerals (oxides) on coke microstructure are studied by adding 13 types of different oxides into coal to carbonize using optical microscopy and X-ray powder diffraction.
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