刘焕明
,
杜红
,
杨祖磐
,
李国栋
,
杜昆
金属学报
在1500℃下用金属Sn作熔剂,石墨作还原剂,采用“熔渣—金属Sn”化学平衡法和相图计算法,得到了高炉型熔渣中TiO_2的活度,并讨论了渣中TiO_2的活度和活度系数随其浓度变化的规律。
关键词:
TiO_2
,
activity
,
blast furnace
LIU Huanming DU Hong Benxi Iron and Steel Company
,
Benxi
,
ChinaYANG Zupan Northeast University of Technology
,
Shenyang
,
ChinaLI Guodong DU Kun Centrel Iron and Steel Research Institute
,
Ministry of Metallurgical Industry
,
Beijing
,
China
金属学报(英文版)
Activity of TiO_2 in the molten blast furnace slag containing TiO_2 has been examined at 1500℃ by means of “molten slag-Sn” chemical equilibrium method,using metallic Sn as flux and graphite as deoxidizer,together with phase diagram caIculation.In the pentary slag system CaO-MgO-SiO_2-TiO_2-Al_2O_3,a_(TiO_2)=0.01—0.05 or 0.02—0.10 with pure liquid or solid TiO_2 as standard state,respectively.The activity and activity coefficient of TiO_2 in relation to concentration of TiO_2 have been discussed.
关键词:
TiO_2
,
null
,
null
,
null
Xuefeng YANG
金属学报(英文版)
doi:10.1016/S1006-7191(08)60123-4
The phenomena of tuyere upward-warp have been found at No.6 blast furnace in Kunming Steel Company China after its blow-in, which has made a great impact on the practical production of the furnace. Thus, a number of efforts have been made to elucidate the mechanism of this phenomenon. The results of investigation and tests revealed that the enrichment and expansion of zinc in the tuyere bricks is the main factor leading to the tuyere upward-warp. The eroding behavior of zinc is that the inner structure of the tuyere bricks turns from dense to loose with entering, enriching and expanding of zinc, which forms spot-like→stripe-like→ditch-like→vein-like→tumor-like eroding passage. Additionally, it is found that the sequence of deleterious elements entering the tuyere refractory is K, Na, Zn and Pb, respectively. Finally, the phenomena and process of zinc crystallization and growth in the refractory have been clearly observed and recorded during this investigation.
关键词:
Blast furnace
,
tuyere
,
refractory
,
zinc
,
erosion
,
deleterious elements
MI Keqin ** East China Institute of Metallurgy
,
Ma'anshan
,
Anhui
,
243002
,
China.
材料科学技术（英）
Based on thermodynamic calculation,oper- ating data and experiments,Si transmission in B.F. is described in this paper.The Si in hot metal is con- trolled by both reduction and reoxidation.Equilib- rium calculation gives a tapping value and the pro- file of Si content of the hot metal in B.F.The first important factor to control Si content is reaction temperature.The coke reactivity and solution loss are more sensitive to in-situ coke reduction and Si content.
关键词:
Si-content
,
null
,
null
邓永春
,
贾素奇
,
吴胜利
,
姜银举
钢铁钒钛
doi:10.7513/j.issn.1004-7638.2015.06.010
包钢高炉瓦斯灰由于受白云鄂博铁矿石成分复杂性的影响,其含铁量低、有害元素碱金属氧化物K2O、Na2O和Pb、Zn氧化物含量高.通过利用瓦斯灰中的碳、或在瓦斯灰中配入氯化钙,采用还原-蒸发-磁选、氯化-挥发的方法,使其中的钾、钠、铅和锌氧化物转变为易蒸发的单质或转化为易挥发的氯化物,从而达到与瓦斯灰分离的目的.还原-蒸发-磁选试验结果表明:在温度为1 000℃,反应时间为2h时,Na、Pb、Zn的去除率可达到94.21％、98.53％、91.98％,而K不能通过碳还原去除;以950℃、反应2.0h的还原-蒸发产物为原料进行磁选,当磁选电流为0.6A时,铁的回收率达90.24％.氯化-挥发试验结果表明:当温度为1 000℃时,Pb、Zn的去除率分别为99.62％、85.56％;Na、K的去除受温度影响不大,在试验条件下,均可达到98％以上,K的去除是通过氯化反应进行的,而Na的去除是碳的还原和氯化反应同时进行的结果,但氯化反应更易发生.
关键词:
高炉
,
瓦斯灰
,
还原
,
蒸发
,
磁选
,
氯化
,
去除率
冯学武
,
金焱
,
李洋
,
程常桂
,
常正昇
,
金业磊
钢铁钒钛
doi:10.7513/j.issn.1004-7638.2015.05.023
为探究炉缸炉底在正常侵蚀的情况下和出现挂渣之后侵蚀的情况下炉缸内铁水流场的区别.以流体力学理论基础,建立了炉缸炉底在侵蚀前后铁水流场的三维数学模型和炉缸内生成结渣之后铁水流动对炉缸炉底的侵蚀情况的三维数学模型.利用CFX软件,研究不同时期炉缸炉底的速度矢量和不同位置的流线.结果表明,生成挂渣前后炉缸出现环流现象,但是由于挂渣粘附在炉缸上,对炉缸有一定的保护作用,同时炉缸内出现挂渣之后减小了炉缸的内部构造,使铁水流出出铁口的速度加快.在生产中可利用生成挂渣,加快出铁速度,同时依靠挂渣的保护作用,延长高炉炉缸的使用年限.
关键词:
高炉
,
炉缸
,
炉底
,
剪切应力
,
流场
,
挂渣
,
死焦柱
闫超杰
,
陈树军
,
赵晓杰
,
李福民
,
吕庆
,
郄亚娜
钢铁钒钛
doi:10.7513/j.issn.1004-7638.2017.01.004
炉缸区钒氧化物的还原对钒的收得率具有重要影响.通过研究炉渣成分和温度对钒氧化物还原的影响,结果表明:二元碱度对钒氧化物还原影响显著,钒氧化物的还原率随着二元碱度的增加而增加;MgO、Al2O3含量增加,钒氧化物的还原率先升高后降低;TiO2含量增加,钒氧化物的还原率降低,且TiO2含量超过11％时钒氧化物的还原率大幅降低;钒氧化物的还原率随着温度的增加而升高.当承钢高炉渣的二元碱度1.2、Al2O3含量14％、MgO含量10％、TiO2含量9％、炉渣温度控制1 500℃时,钒氧化物的还原达到最佳,还原率达到90％左右.
关键词:
高炉
,
炉缸区
,
钒氧化物
,
还原
,
钒收得率
,
炉渣成分
,
温度
