粉体粒度对神府煤制备高性能水煤浆的影响

摘要

Shenfu coal with high water content and high oxygen /carbon ration was not suitable to prepare water coal slurry with high property by wet method.The slurry was made through dry grinding and wet formula by selecting raw coal and washing coal from same mine district , and has analyzed the property of the coal slurry.Result indicates that abrasive index HGI of coal and grinding time determine jointly granularity distribution of powder body , the granularity of the powder body is directly related to flow ability and stability of coal slurry, powder body granularity is get finer as possibly during grinding. Powder body with a granularity more than 0.2mm mainly effects the stability of coal slurry, the more granules can make coal slurry property worse due to gravity settling role; Powder body with a granularity smaller than 0.076mm mainly effects the flow ability of coal slurry , a suitable quality degree ratio can form double degree or multi-degree rations with the large granules.The constituents of powder body with a granularity smaller than 0.076 mm are separate-ly 45% and 50% in case of better property during making slurry by SFR and SFX.%　　神府煤内水含量高、氧碳比高，不利于湿法气化制备高性能水煤浆。选择神府同一矿区的原煤、洗煤，通过干磨湿配制浆，并对煤浆性能进行分析。结果表明，煤的可磨指数 HGI 与磨矿时间共同决定粉体的粒度分布，粉体粒度与煤浆的流动性及稳定性直接相关，磨矿过程应尽可能使粉体粒度偏细。粒度＞0．20 mm 的粉体主要影响煤浆的稳定性，较多的大颗粒会因重力沉降作用导致煤浆性能变差；粒度＜0．076 mm 的粉体主要影响煤浆的流动性，合适的质量比配能与大颗粒形成双级或多级级配。 SFR、SFX 制浆性能较好时粒度＜0．076 mm 的粉体分别占45％、50％。