煤泥浮选论文初稿

内蒙古科技大学

本科生毕业设计说明书（毕业论文）

题目：棋盘井某煤矿选

矿厂煤泥水浮

选工艺的实验

研究

学生姓名：

学号：

专业：矿物加工工程

班级：矿加09-1班

指导教师：

摘要

我国是个以煤炭作为主要能源的国家，我国煤炭原煤灰分偏高，而且随着机械化采煤比例提高，煤泥海量越来越高，高灰难选细颗粒煤泥呈现“细、杂、难”的特点。

灰分是有害物质。根据煤炭工业中长期发张规划，在选煤技术方面，将重点发展高灰、高硫及难选煤的洗选煤技术、细粒煤分选技术。浮选是处理煤泥的主要途径，也是降低煤泥灰分的有力途径。所以对浮选方法处理煤泥工艺的探究具有重要的实际意义。

本试验重在探究浮选工工艺主要包括分级入选、二次浮选以及加絮凝剂浮选等工艺对降低煤泥灰分的效果影响。试验原煤来自内蒙古鄂克托旗某煤矿选矿厂待处理煤样，在实验室条件下，通过分级浮选、二次浮选及其分级二次浮选正交试验，改变絮凝剂用量、絮凝剂作用时间及其正交试验，来探究浮选工艺。

实验证明二次浮选在一定程度上可以改善浮选效果，特别是精煤的精选可以有效的有效的降低精煤灰分。分级浮选对此种煤样的浮选作用不大。聚丙烯酰胺的用量和作用时间在一定条件范围内可以改善浮选效果，超过这个范围效果就不再明显。

关键词：浮选工艺；煤泥；灰分；絮凝剂

ABSTRACT

Ours is a coal as the main source of energy, China's coal coal ash high, and with the increased proportion of mechanized coal mining, coal increasingly high mass, high-ash refractory slurry of fine particles show a "fine, mixed, difficult" characteristics.

Ash is hazardous. Send a coal industry under long-term planning in the coal preparation technology, will focus on the development of high-ash, high-sulfur coal and hard coal washing technology, fine coal sorting technology. Slime flotation is the main way to deal with, but also a powerful way to reduce sludge ash. So treated slime flotation process of inquiry has important practical significance.

This test focuses on exploring the flotation process includes grading work was selected, as well as the secondary flotation process flotation flocculant sludge ash to reduce the effect of impact. Test coal from a coal mine in Inner Mongolia Hubei Hector flag pending coal plant, under laboratory conditions, by fractional flotation, flotation and secondary grade secondary flotation orthogonal change coagulant dosage, flocculant the role of time and orthogonal experiment to explore the flotation process.

Experiments show that the secondary flotation can be improved to a certain extent, the flotation results, especially coal selection can effectively reduce the ash content effectively. Grade coal flotation flotation of such little effect. The amount of polyacrylamide and time in a certain range of conditions can improve the flotation effect, over this range the effect is no longer evident.

Key words：Flotation process ； Slime；Ash；Flocculant

目录

摘要 (2)

ABSTRACT (3)

目录 (4)

第一章绪论 (6)

1.1煤炭中的灰分及由来 (6)

1.1.1灰分的定义 (6)

1.1.2灰分的分类和由来 (6)

1.2 课题的提出 (6)

1.2.1 课题的研究意义 (6)

1.2.2 课题的研究内容 (7)

1.2.3课题可行性 (7)

1.3关于分级浮选、二次浮选和絮凝浮选研究状况 (8)

1.3.1于分级浮选的研究概况 (8)

1.3.2二次浮选的研究概况 (8)

1.3.3絮凝浮选的研究和发展概况 (9)

第二章煤质分析及实验方案 (10)

2.1煤样分析 (10)

2.1.1煤矿概况 (10)

2.2.2煤质分析 (10)

2.2实验方案 (11)

第三章试验过程和结果分析 (12)

3.1准备试验 (12)

3.2分级浮选 (13)

3.3二次浮选 (14)

3.4分级浮选后二次浮选 (15)

3.5絮凝剂的用量探究实验 (16)

3.6絮凝剂的作用时间探究实验 (18)