弱还原气氛下淮南煤灰矿物质特性研究

对淮南煤在弱还原气氛下的矿物质特性进行实验研究，用X-射线衍射和红外光谱分析不同温度下煤灰矿物组成变化。结果表明：淮南煤中主要晶体矿物有高岭石、石英、方解石、黄铁矿等，高岭石类矿物含量越高，煤灰熔点越高；方解石和黄铁矿含量越高，煤灰熔点越低。煤灰中主要晶体矿物有石英、硬石膏、赤铁矿等，硬石膏和赤铁矿含量越高煤灰熔点越低。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。

Study on Mineral Features in Coal Ash of Huainan in Weak Reducing Atmosphere

Mineral features of Huainan coal ash in weak component variation of the ash at different temperatures Infrared quartz, Spectrum（FTIR）. The results showed that coa calcite and pyrite. Kaolinite in coal increases ash reducing atmosphere was studied. The mineral was analyzed with X-ray diffraction （XRD） and 1 ashes of Huainan generally contain kaolinite, melting temperature. Calcite and pyrite in coal reduce ash melting temperature. Crystalloid minerals in the coal ashes generally are quartz, hematite and anhydrite. The higher anhydritc and hematite content is, the lower the ash melting temperature is. 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.