菱镁矿制备氧化镁技术进展及趋势

何艳; 王连勇; 崔家新; 王睿

doi:10.3969/j.issn.1000-6532.2024.05.014

菱镁矿制备氧化镁技术进展及趋势

1.
东北大学冶金学院，辽宁　沈阳　110819

2.
国家环境保护生态工业重点实验室，辽宁　沈阳　110819

基金项目: 国家重点研发计划资助项目（2017YFB0304200）

详细信息

作者简介: 何艳（1998-），女，硕士研究生, 主要从事工业节能减排

通讯作者: 王连勇（1976-），男，博士，副教授，研究方向为冶金工程。

中图分类号: TD952

收稿日期: 2022-11-03

刊出日期: 2024-10-25

Technology Progress and Development Trend of Preparing Magnesium Oxide from Magnesite

1.
School of Metallurgy, Northeastern University, Shenyang 110819, Liaoning, China

2.
State Environmental Protection Key Laboratory of Eco-industry, Shenyang 110819, Liaoning, China

More Information

Corresponding author: WANG Lianyong, wlyneu@126.com

Received Date: 03 November 2022

Publish Date: 25 October 2024

摘要

摘要:
这是一篇矿业工程领域的论文。我国菱镁矿资源丰富且品质优良，储量与品位皆位居世界第一，工业上常用其来制备氧化镁。菱镁矿在煅烧过程中微观结构的改变是影响氧化镁产品性能的关键。以此为切入点，首先概述了菱镁矿制备高性能氧化镁产品的技术进展，之后根据行业发展的制约因素分析了该领域的未来发展趋势。
- 矿业工程 /
- 菱镁矿 /
- 环境保护 /
- 资源节约 /
- 氧化镁
Abstract:
This is an article in the field of mining engineering. Magnesite in China is rich and good in quality. Its mineral quantity and grade rank the first in the world. It is widely used as the raw material for the production of magnesium oxide in industry. The change of microstructure of magnesite during calcination is the key to performance the properties of magnesia products. Taking this as the starting point, the technical progress of preparing high-performance magnesia products from magnesite is summarized firstly. Then, according to the restrictive factors of industry development, this article analyzes the future development trend of this field briefly.
- Mining engineering /
- Magnesite /
- Environmental protection /
- Resource saving /
- Magnesium oxide

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表 1 菱镁矿煅烧设备的优缺点

Table 1. Advantages and disadvantages of magnesite calcination equipment

菱镁矿煅烧设备	优点	缺点
反射炉	工艺简单	重污染，能耗高，逐渐淘汰
竖炉	工艺简单	重污染，产品质量不稳定
悬浮炉	受热均匀、能耗低、自动化	原料要求高、检修困难
多层炉	效果好、自动化	成本高
回转窑	煅烧均匀、能耗低、效果好	CO₂、NOx排放

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表 2 水泥行业常用的低氮燃烧技术

Table 2. Low nitrogen combustion technology commonly used in cement industry

低氮燃烧技术	工艺技术	脱硝效率	参考文献
低氮燃烧器	由单通道燃烧器现已发展到多通道燃烧器，通过低一次风量、高一次风速，大速差强旋流、拢焰罩等设计抑制NOx的生成	10%～15%	[35]
分级燃烧	燃料和助燃空气分级送入，有燃料分级和空气分级燃烧之分，通过改变燃烧氛围尽可能的抑制NOx的生成	15%～25%	[36]
O₂/CO₂燃烧技术	O₂与富含CO₂的烟气混合再送入窑内，从源头上降低N含量，减少NOx的生成	实验室阶段	[37]

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