Energy Conservation for Granular Coal Injection into a Blast Furnace

被引：4

作者：

Guo, Hongwei ^{[1
]}

Su, Buxin ^{[1
]}

Zhang, Jianliang ^{[1
]}

Shao, Jiugang ^{[1
]}

Zuo, Haibin ^{[1
]}

Ren, Shan ^{[1
]}

机构：

[1] Univ Sci & Technol Beijing, Sch Met & Ecol Engn, Beijing 100083, Peoples R China

来源：

JOM | 2012年 / 64卷 / 08期

关键词：

PULVERIZED COAL; RATES; COKE;

D O I：

10.1007/s11837-012-0390-5

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Due to the lack of knowledge regarding the combustion of granular coal injected into a blast furnace, injection characteristics of granular coal were first studied through proximate analysis, element analysis, and research of explosivity, ignition point, meltability of ash, grindability, calorific value, etc. Using a sampling device in the raceway combined with petrographic analysis, during the combustion process of granular coal with high crystal water and volatile in raceway, cracks and bursts were found, leading to a reduction of particle size. Based on a model of mass control and dynamic theory of particle combustion, the transition dynamic model for cracking in combustion of granular coal was found, and the critical value of cracking ratio (Omega(P)) for granular coal combustion in the raceway was calculated. Finally, the utilization ratio and energy efficiency of granular coal used in the blast furnace were discussed, offering theoretical foundation and technical support for intensifying granular coal combustion and promoting granular coal injection.

引用

页码：1002 / 1010

页数：9

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