8 2018年8月
过程与工艺
过程工程学报
The Chinese Journal of Process Engineering
Vol.18 No.4 Aug.2018
D0I: 10.12034/j.issn.1009-606X.217373
Effectofalkalimetalongasificationreactionof cokewithCOzandsteam PingWANG',YuWU,Hongming LONG,Zhanxia DI,Jiaxin LI,Rufei WEI,ShucaiYU School of Metallurgy Engineering, Anhui University of Technology, Ma'anshan, Anhui 243002, China
Abstract: The effects of K/Na on the gasification reaction of coke with CO2 or steam were studied by self-made gassolid reaction device. The results showed that the effect of K/Na on coke gasification reaction with CO2 is stronger than that with steam. While the content of Na in coke increased from 0.045wt% to 0.727wt%, the reactivity index of coke with CO2 and steam increased by 23.17% and 14.35% respectively, and the coke strength decreased by 27.55% and 18.31% respectively after reaction. With the increase of K/Na content in coke, the apparent start temperature,severe reaction temperature and apparent activation energyofcoke gasification reaction with CO2 and steam were obviously reduced. While the content of Na in coke increased from 0.045wt% to 0.727wt%, the apparent start temperature of coke gasification reaction with CO2 and steam ahead of 170 and 20C respectively, and the severe reaction temperature ahead of 165 and 80C respectively.While the content of Na in coke increased from 0.045wt%to 0.326wt%,the apparentactivation energy ofcokegasificationreaction with CO2and steam decreased by 22.56 and 9.26 kJ/mol respectively.
Key words: coke; gasification reaction; alkali metal; COz; steam
碱金属对焦炭与CO2或水蒸汽气化反应的影响
魏汝飞，俞书才
王平，吴雨，龙红明，狄瞻霞，李家新，安徽工业大学冶金工程学院，安徽马较山243002
摘要：采用自制的气-固相反应装置研充了K/Na对焦炭与CO和水蒸汽气化反应的影响.结果表明，K/Na对焦炭与COz气化反应的催化作用强于对焦炭与水蒸汽反应的催化作用，焦炭中Na含量由0.045wt%增加到0.727wt%，焦炭与CO2和水蒸汽气化反应的反应性指数分别增加23.17%和14.35%，反应后焦炭强度分别降低27.55%和18.31%，焦炭中K/Na含量增加，焦炭与 CO2和水蒸汽气化反应明显开始温度、激烈反应温度和反应表观活化能均降低，焦炭中Na含量由0.045wt%增加到0.727wt%，焦炭与COz和水蒸汽气化反应明显开始温度分别降低170和20℃，激烈反应温度分别降低165和80C，Na含量由0.045wt%增
加到0.326wt%，表观活化能分别降低22.56和9.26kJ/mol. 关键词：焦炭：气化反应：碱金属：CO2：水蒸汽
文献标识码：A
文章编号：1009-606X(2018)04074307
中图分类号：TF526
1
前言
高炉生产过程中，由原料带入的碱金属在炉内中下
部存在富集效应，使高炉中碱含量剧增。焦炭作为高炉
料柱的骨架，其吸附的碱金属含量可达到初始碱含量的 20倍以上(1,2)，已成为碱金属吸附的主要载体，高炉内碱金属的富集对碳溶反应起着催化剂的作用，使焦炭的溶损率最高可达30%~40%/3，焦炭结构被破坏，粒度急剧
收稿： 20171101,修回： 20180110,网络发表： 20180306, Received: 20171101,Revised: 20180110, Published online: 20180306 基金项目：国家自然科学基金资助项目(编号：51474002）
370561961
Wang P, WaY, ong HM,etal.Efft ofalkali metalon gasificationreaction ofcoke with COorsteam (in Chinese). Chin. JProcess Eng 2018, 18(4);: 743749, DOI: 10.12034/j.issa.1009-606X.217373,
万方数据