摘要
分析了煤伴生矿物的泥化特性和泥化对选煤的不利影响,说明选煤厂设计时应重视煤伴生矿物的泥化问题,对煤伴生矿物进行泥化试验,依据试验结果选择选煤工艺流程和煤泥水处理设备。论述了煤伴生矿物泥化试验方法和泥化程度的评定步骤,得出了煤伴生矿物泥化程度的评定标准。分析了泥化程度对选煤厂设计的影响,说明当煤伴生矿物泥化严重时,重介选煤工艺应优先考虑预先脱泥方案,如果不脱泥,则应选择两次浮选、双段脱水回收工艺流程,同时还应注意浓缩沉降面积和煤泥水处理设备的选择。最后通过实例分析了泥化程度对选煤厂生产管理的影响,当煤伴生矿物泥化程度属于高泥化程度(HDW)时,应采用高效絮凝剂、凝聚剂及联合加药系统,同时对选煤厂进行改造,保证煤泥水处理工艺系统完善;当煤伴生矿物泥化程度属于中泥化程度(MDW)或中高泥化程度(MHDW)时,不能忽略煤泥水系统的完善性,厂房布置不能过于紧凑。
The gradation properties of associated minerals and their effects on coal preparation determine the coal preparation process and slime water treatment equipments. Discuss associated minerals test method and mudding degree evaluation steps, obtain its evaluation standard. Once the degradation is serious, dence medium coal preparation plant should adopt pre-desliming process in advance, if not, it should choose secondary flotation and two- stage dewatering process. The selection of sedimentation area and slime water treatment equipments is also important. The analysis of practical production further indicates the influence of degradation on coal preparation plant management. The results show that, the high level degradation requires effective flocculant, coagulant and agent feeding system. The coal preparation plant also should be transformed. The medium or medium-high degradation level requires perfect slime water treatment system and incompact workshop arrangement.
出处
《洁净煤技术》
CAS
2012年第5期24-27,共4页
Clean Coal Technology
关键词
煤伴生矿物
泥化
选煤厂设计
预先脱泥
重介选煤
associated minerals
degradation
coal preparation plant design
pre-desliming
dense medium coal preparation
