(选煤厂毕业设计说明书11.docVIP

选煤厂毕业设计说明书 摘 要 我国矿产资源多数有用组分含量较低，矿物组成较复杂，必须经过选矿才能提高有用组分含量，改善质量。当前，我国每年有约3亿吨原煤通过选矿后供应给不同用户，选煤技术及工艺在我国矿物发展工业中起着越来越重要的作用。 本设计根据盘县老屋基矿区煤层，设计一个处理能力120万吨/年的选煤厂。根据实地原煤属于高灰、高硫、原煤、粒度、煤质分布不均匀、煤质较脆、矸石易泥化的较难选的炼焦用煤情况，采用无压三产品重介质旋流器选煤工艺，经过重介分选后的-.125mm的煤泥进入浮选系统分选。同时，配以其他大型高效的辅助设备，形成一套简化、高效、可靠、灵活的选煤工艺流程通过重介、浮选和压虑作业处理，最终可以生产出灰分为9.22%的9级精煤。 关键词： 重介旋流器 浮选 分级 灰份 产率 可选性 Summary My most useful mineral resources to pick winners at lower levels, more complex mineral composition must be useful cluster of content can be enhanced through processing, improving quality. At present, Chinas 300 million tons of coal annually through milling around after supply to different users, Xuanmei technology and processes in the development of our mineral industry plays an increasingly important role. According to the design based mining coal bed Panxian How to design a handling capacity of 1.2 million toe coal dressing plants. According to the site is a high ash coal, sulphur, coal, granularity, the coal is of relatively uneven distribution, the coal is of relatively less crisp, gangue Yi mud of the more difficult election coking coal, used three products without pressure on medium Xuanliu devices Xuanmei craft, after re-election referred hours after the Meini -.125mm flotation system into sub-election. At the same time, coupled with other major efficient auxiliary equipment, a set of simplified, efficient, reliable, flexible Xuanmei given by the Kai, flotation and pressed into operation to deal with, and ultimately could produce ash into the 9 9.22% class Plant. Keyword : heavy-medium cyclone flotation Classification Grey Off rate An optional 目 录 第一章 厂区及原料煤基地概况 3 第二章 选煤工艺 4 第一节 煤质特征及其可选性 4 第二节 选煤方法、分选粒级及工艺流程 4 第三节 选煤工艺流程计算 8 第四节 主要工艺设备的选型与计算