摘要
利用一组物料、热量守衡式及其他有关约束关系,建立了氢还原竖炉模拟模型,可定量考察消耗量、生成量和氮气、CO兑入成分、DRI金属化率、入炉煤气温度等的关系。模拟结果表明:兑入CO可使入炉煤气量从纯氢还原的1 650N·m3左右下降到1 200N·m3左右;当CO和H2的体积之比V(CO)/V(H2)约为0.6时,氮气兑入量约为0,竖炉能量利用最佳;当V(CO)/V(H2)体积比为0.3时,最佳氮气兑入成分约为11%;纯氢还原最佳氮气兑入成分约为25%;兑入氮气可以减少入炉氢气的量,但不能减少入炉气体的总量。对氢还原竖炉模拟结果可为其工艺设计、操作和节能等提供参考信息。
A mathematical model for ore reduction mainly by H2 in shaft furnace was established by a set of conservation equations of materials and heat, and other constraint conditions. All consumptions and productions could be calculated if the composition of N2, the value of V（CO）/V（H2）, the metallization ratio of DRI, the temperature of input gas, etc. were given. It shows that the input gas can be reduced from 1 650 N · 3 for H2 reduction to 1 200 N · m3 by CO addition. When the volume ration of CO to H2 V（CO）/ V（H2） was 0.6, the energy utilization ratio of shaft furnace was maximum without N2 addition; when V（CO）/V（Hz） = 0.3, the optimum composition of N2 was 11% ; when V（CO）/V（H2 ） = O, the optimum composition of N2 was 25%. The N2 addition may result in H2 consumption, but could not reduce the total input gas. The simulation will provide reference to process design, operation and energy saving.
出处
《重庆大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2016年第4期57-66,共10页
Journal of Chongqing University
基金
国家自然科学基金资助项目(50704040)
重庆市自然科学基金资助项目(CSTC2009BB4197)~~
关键词
DRI
氢还原竖炉
氮气兑入
CO兑入
能量利用
DRI
hydrogen reduction shaft furnace
N2 addition
CO addition
energy utilization
