集成化白云石悬浮煅烧引领镁产业变革
Integrated Suspension Calcination of Dolomite Leads Great Change in Magnesium Industry
单智伟 1王悦存 1王鹏飞 2马英子 1郑芮1
作者信息
- 1. 西安交通大学 金属材料强度国家重点实验室, 陕西 西安 710049;西安交通大学 陕西省镁基新材料工程研究中心, 陕西 西安 710049;西安交通大学材料科学与工程学院, 陕西 西安 710049
- 2. 国科镁业科技(河南)有限公司, 河南 洛阳 471000
- 折叠
摘要
白云石煅烧作为硅热法炼镁的第一步,不仅是主要的能耗和碳排放环节,其煅烧产物的质量更是直接影响原镁的产率与品质.目前主流的回转窑煅烧工艺存在热效率低、能耗高、污染大、单线产能低、产品质量不稳定等问题,整个煅烧工序亟待技术革新.提出了利用悬浮态煅烧替代回转窑进行白云石煅烧,并对两种工艺进行了综合对比,悬浮煅烧呈现出显著的技术、环保及经济优势:理论上节能 50%以上,CO2 减排超 20%,生产成本较目前降低 35%,而且可以有效避免"过烧"和"欠烧",获得高质量、性能稳定性好的煅烧产物,为后续炼镁环节提供优质原料.还分析了用绿色、高效的集成化白云石悬浮煅烧技术替代目前的"分散式"煅烧的可行性及对整个镁产业可能产生的颠覆性影响.
Abstract
The calcination of dolomite,as the first step of silicothermic reduction magnesium production,is not only the main step of energy consumption and carbon emission,but also the key influencing factor for the yield and quality of primary magnesium.At present,the mainstream calcining process of rotary kiln is faced with many problems,such as low thermal efficiency,high energy consumption,large pollution,low single-line production capacity and unstable product quality.The whole calcination process is in urgent need of technical innovation.In this paper,suspension calcining process is proposed to replace rotary kiln for dolomite calcination,and the two processes are compared comprehensively.The former shows remark-able technological,environmental and economic advantages:theoretically,the energy saving is more than 50%,the CO2 emission reduction is more than 20%,the production cost is reduced by 35%compared with the present,and can effectively avoid"overburning"and"underburning"to obtain high quality calcined products with stable performance for the subsequent magnesium smelting process.This paper also analyzes the feasibility of replacing the present"scattered"calcination with environment friendly and efficient integrated dolomite suspension calcination and its possible revolutionary influ-ence on the whole magnesium industry.
关键词
白云石/悬浮煅烧/集成化/绿色/低成本Key words
dolomite/suspension calcination/integra-tion/environment friendly/low-cost引用本文复制引用
出版年
2024
NETL
NSTL
维普
万方数据