Preface

Metallurgical industry is the basic industry of national economy and an important symbol of national strength and industrial development level. It provides materials and products for machinery, energy, chemical industry, transportation, construction, aerospace, national defense and military industry and other fields. The development of modern industry, agriculture, national defense and science and technology constantly puts forward new requirements for metallurgical industry, and promotes the development of metallurgical discipline and engineering technology. On the other hand, the development of metallurgical engineering provides a new material basis for the progress of human civilization.
Metallurgical industry is a raw material industry that develops metal mineral resources and produces all kinds of metal products, which is closely related to the national economy and people's livelihood. In the production process of metallurgical enterprises, a large number of materials need to be processed. These materials have different physical and chemical states in the whole process. While smelting and extracting the main metal, a large number of “three wastes” (waste water, waste gas and waste residue) are produced. The discharge of these waste water, waste gas and waste residue will cause serious environmental pollution. How to reduce, recycle and make harmless these pollutants is one of the main tasks of metallurgical workers at present. Energy conservation and emission reduction is an important policy of the country. As an important part of the industrial system, metallurgical industry plays an important role in energy conservation and emission reduction. Metallurgical production process consumes a lot of energy and resources, but also produces a lot of pollutants. In order to realize energy conservation and emission reduction in metallurgical industry, advanced technology and equipment are the key points. It is of great significance to analyze energy consumption, pollutant emission and key energy conservation and emission reduction technologies in metallurgical industry.
In the process of writing this book, it has been greatly supported by many people and units, and the author would like to express heartfelt thanks. In addition, the compilation of this book also refers to the literature published at home and abroad, and the editor expresses sincere thanks to the relevant authors and publishers.
Due to the wide content of this book and the limited level of its editors, we sincerely hope that readers will give us valuable opinions.

前 言

冶金工业是国民经济的基础工业，是国家实力和工业发展水平的重要标志，它为机械、能源、化工、交通、建筑、航空航天、国防军工等领域提供所需的材料产品。现代工业、农业、国防及科技的发展对冶金工业不断提出新的要求，并推动着冶金学科和工程技术的发展；反过来，冶金工程的发展又不断为人类文明进步提供新的物质基础。
冶金工业是一个以开发金属矿产资源、生产各类金属产品的原材料工业，与国计民生息息相关。冶金企业在生产过程中，需要处理大量的物料，这些物料在整个流程中具有不同的物理、化学状态，在冶炼提取主金属的同时，产生大量的“三废”（废水、废气、废渣）。这些废水、废气、废渣的排放将会造成严重的环境污染，如何将这些污染物实现减量化、 资源化、 无害化是当前冶金工作者的主要任务之一。节能减排工作是国家的重要政策，冶金工业作为工业系统重要的组成部分，其节能减排的重要性不言而喻。冶金生产过程消耗大量的能源和资源，同时也产生大量的污染物。要实现冶金工业的节能减排，先进技术与装备是重点，分析冶金工业的能源消耗、污染物排放和关键节能减排技术意义重大。
在本书的编写过程中， 得到了许多人和单位的大力支持， 在此表示衷心的感谢。此外，本书的编写还参考了国内外公开发表的文献资料，编者向有关作者和出版社一并表示诚挚的谢意。
由于本书内容涉及较广，加之编者水平所限，书中不妥之处，热诚希望广大读者提出宝贵意见。