本科论文（设计）3.00 Mt-a晋城（矿区型）选煤厂方案优化及主厂房工艺布置.docVIP

第 PAGE 9页 摘要 本设计为3.00Mt/a的矿区型选煤厂，地处山西晋城市。该厂的工作制度为每年工作330天，每天16小时，施行两班生产，一般检修的轮换制度。 本厂入洗晋城一矿，二矿原煤，两者的比例为59.2%：40.8%。主要产品为精煤、中煤和煤泥。其中，精煤灰分要求为7.51~8.00%，水分Mt≤12.00%。 经过原煤资料分析、可选性判断以及经济技术比较后，本选煤厂流程定为三产品重介旋流器—浮选联合工艺流程。原煤筛分破碎准备作业后，经过三产品重介旋流器分析，选出精、中、矸三个产品，煤泥浮选，尾煤压滤，达到洗水闭路循环。精煤、中煤用铁路运出，煤泥和矸石用汽车外运，在当地销售。 该厂的主要建筑有准备车间、原煤仓、主厂房、压滤车间、产品仓等。其中，主产房南北8跨，东西4跨。 由于该厂为大型厂，所选设备大处理量较大，其中三产品旋流器为3DGM1200/850C，精煤脱介筛型号为ZS2570，中煤脱介筛型号为ZKS2460，矸石脱介筛型号为ZKS2460，精煤磁选机型号为CTXN1018，中煤磁选机型号为CTXN1018，精煤离心机型号为TLL-900，中煤离心机型号为TLL-900，浮选机采用XJM-S16型。 本厂总投资16214.74万元，吨煤基建投资54.05元/t，投资回收期4.7个月，全员效率为70t/工。 除工艺流程外，本设计还对选煤厂的建筑结构、供电和电气、机修车间、铁路运输、劳动定员、生产成本及建厂初步投资概算做了系统的设计。 设计时吸收了国内先进经验，全厂生产作业实现了集中控制、机械化和自动化。 关键词：设计； 重介质选煤； 浮选 ABSTRACT This is a coal processing plant design for Mine-based coal preparation plant and its designed productivity capacity is 3.00Mt/a.Its located in jincheng of shanxi Province.There are 330 workdays per year and 16 hours per workday in this plant which runs in shifts,two shifts are in charge of producing and another is in charge of checking and repairing equipments. The raw coal comes form 1 Mine2 Mine of the jincheng-Coal Mine,and between which the proportion is 59.2 percents to 40.8 persents.The main products are: clean coal,middling and tailings.Among them the clean coal require Ad is between 7.51 persent and 8.00 persent,Mt≤12.00% at the same time. After analyzing the date of coal samples,estimating of the quality and comparation of economics and technique,the flowsheet of the plant is designed as roughing of the there product heavy medium-flotation united.All of the raw coal is separated in there-product-dense-medium cyclones.In the final the fine coal is concentrated by flotation.The tailings from flotation are treated by pressure filtration so that fine coal can be recovered and washing water is recycled inside the plant.Among the products of the plant,the fine coal and middle coal are carried by train.The gangue and the slime are carried by car, selling in the region.