文章信息/Info

Title:

Process-based steel production environmental impact analysis and optimization

作者:

周和敏

鋼鐵研究總院先進鋼鐵流程與材料國家重點實驗室

Author(s):

Zhou Hemin

State Key Laboratory of advance Steel Processing and Products，Central Iron & Steel Research Institute

關鍵詞:

生命周期評價; 環(huán)境負荷; 鋼鐵生產流程; 循環(huán)經濟

DOI:

10.7502/j.issn.1674-3962.2016.03.04

文獻標志碼:

A

摘要:

本文敘述了生命周期評價方法在鋼鐵工業(yè)中應用現(xiàn)狀和發(fā)展前景，并對鋼鐵生產傳統(tǒng)工藝流程和鋼鐵生產新工藝流程和新技術的環(huán)境負荷進行分析和評價。基于鋼鐵生產新工藝流程和新技術的不斷應用，本文對熔融還原煉鐵和薄板坯連鑄連軋生產工藝和流程的環(huán)境負荷進行了評價，與傳統(tǒng)高爐流程相比，熔融還原煉鐵廢氣污染物和廢水污染物減排效果十分明顯；與傳統(tǒng)熱連軋工藝相比，薄板坯連鑄連軋工藝噸材煤氣消耗降低2/3，噸材煙粉塵排放降低約27%。此外，針對我國鋼鐵生產礦物資源和能源消耗過大、環(huán)境污染問題十分突出的現(xiàn)狀，本文指出，通過改進原料和能源結構，加強環(huán)境排放控制和管理，有利于較大幅度地減少污染物的發(fā)生量和排放量。最后本文還結合鋼鐵企業(yè)發(fā)展循環(huán)經濟的實例，提出用生命周期評價方法對實施循環(huán)經濟前后的環(huán)境負荷和循環(huán)經濟發(fā)展程度進行分析研究。結果表明，鋼鐵企業(yè)采用新工藝流程和新技術，尤其是建設循環(huán)經濟型企業(yè)，有利于從根本上降低鋼鐵生產過程環(huán)境負荷。

Abstract:

In this paper, the status of the application and development prospects of life cycle assessment method in the steel industry was described. Moreover, the environmental impacts of traditional steel production process and the new processes and new technologies, were also analyzed and evaluated. Based on the application of new process and technology to the steel industry, the environmental impacts of smelting reduction iron making process and thin slab continuous rolling process were evaluated in the paper. Compared with the traditional blast furnace process, the reduction effect of waste gas and waste water pollutants emission for smelting reduction iron making process was very obvious. Even compared with conventional hot strip rolling process, the fuel consumption of thin slab continuous rolling process was reduced 2/3 and smoke dust emission reduced 27%. Since the steel industry consumes large amounts of mineral resources and energy, to cause environmental pollution problems become very prominent, this paper pointed out that, by improving the consumption structure of raw materials and energy, strengthening environmental emission control and management, it could been greatly reduced for the amount of generation and emission of pollutants. Taking examples of the circular economy development in some steel companies, this paper thoroughly calculated and analyzed the environmental impacts of before and after the implementation of circulation economy, and its development level by using life cycle assessment method. The results show that the new technology and new steel production process especially in the construction of circular economy enterprises, will help to reduce the environmental impacts of steel production process fundamentally.