【摘要】 以无烟煤为原料,亲水有机高分子物质和无机物为粘结剂制备气化用型煤。以型煤热稳定性、热强度、冷强度和湿球强度作为型煤特性指标,考察了水分含量、粘结剂添加量和复配方式等对型煤性能的影响。利用偏光显微镜和热重分析等手段对型煤以及粘结剂进行了表征,分析了成型机理。结果表明在成型水分为14%、有机和无机物质分别添加2%时,型煤具有很高的热性能(BTS+13=98.62%,热强度为4.82MPa);添加亲水有机粘结剂时,水分在有机物质与煤粒表面之间形成了氢键,干燥脱水后,有机组分固化收缩,转变为与煤之间的化学键;复配无机组分后,无机组分通过吸附作用与有机组分形成结合体,然后与煤表面官能团发生化学键合,高温下形成了连续相凝胶物质,包裹住煤粒,进一步提高了型煤的热性能。更多还原

【Abstract】 Anthracite coal as raw material was blended with an organic polymer and an inorganic component composited binder to prepare Lurgi-gasification briquettes.The performance characteristics,including thermal stability,thermal strength,cold compressive strength and wet compressive strength of briquettes were investigated in relation to the moisture content and binder proportion.The texture of briquettes and the briquetting forming mechanism were analyzed by means of an optical microscope and thermogravity analysis(TGA).Results show that,the briquette thermal stability and thermal strength achieved were optimized through a ratio of moisture at 14%,organic components at 2% and inorganic material at 2% Thermal stability achieved was in order of 98.62% and thermal strength was 4.82 MPa.The addition of inorganic compositions assist in absorbing organic components and then form chemical bonds with the coal particles.The generation of a continuous gel-phase is considered important to promote the thermal stability of the briquette through the agglomeration of coal particles.更多还原