舒兰街矿区煤层煤质特征及洁净等级划分

Characteristics and cleanliness class of coal seam in Shulan Street mining area

为了高效清洁利用舒兰街矿区煤炭,基于舒兰街矿区地质概况、含煤地层特征及煤的物化性质,对矿区煤的煤质特征进行工业分析,确定煤的类型、工业性能和用途,根据最新煤炭资源潜力评价提出的煤炭洁净等级6级划分方案,选取灰分、硫分为主要评价因子对矿区煤的洁净等级进行初步划分。结果表明,矿区煤的宏观煤岩组分以暗煤为主,显微煤岩组分以镜质组为主;矿区煤属中高灰、特低硫、特高挥发分、低发热量的长焰煤;矿区原煤总体洁净等级为Ⅵ级,属差洁净煤,精煤总体洁净等级为Ⅲ级,属较好洁净煤。由于矿区煤发热量低、焦油产率较高、煤灰软化温度和流动温度较高,且经分选后煤炭质量和洁净等级明显增加,可作为动力用煤、气化用煤和炼油用煤原料,经济价值较大。

In order to efficiently and cleanly use the coal in Shulan Street mining area,the coal quality was analyzed based on the general geology,characteristics of coal-bearing strata and physico-chemical property.The type,industrial properties and usage of coal were determined according to the proximate analysis.The rank of coal cleanliness in this mining area was drew primarily from the aspects of ash and sulfur content on the basis of 6 grades of coal cleanliness class proposed for new coal resource potential evaluation. The results show that durain is the main lithotypes in as-mined coal,and huminite is the main maceral. The coal in this mining area is mainly long flame coal with medium-high ash,extremely low sulfur,extremely high volatile and low calorific value. The cleanliness rank of raw coal is Ⅵ,which belongs to low clean coal.The cleanliness rank of clean coal is Ⅲ which belongs to higher clean coal. After washing,coal possessed lower calorific value,higher tar yield,higher ST and FT,and its cleanliness are increased significantly.It thus can be used as steam coal,gasification coal and even coking coal with greater economic value.