响应曲面法优化无烟煤粒度对赤铁矿直接还原效果影响的研究
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摘要
为探究不同粒度的无烟煤对赤铁矿直接还原效果的影响,进行了直接还原试验研究,考察了还原时间、还原温度、配碳量对直接还原效果的影响,并在单因素实验的基础上应用响应曲面法进行优化。优化结果显示:在无烟煤粒度-115目的条件下,可以得到最佳还原效果。在还原温度1 080℃、还原时间1.5 h,配炭量23%,无烟煤粒度-115目的条件下,可得到金属化率98.60%的直接还原铁。
In order to explore the effect of anthracite particle size on direct reduction of hematite, the direct reduction experiment is carried out to investigate the effect of reduction time, temperature and amount of reductant on the direct reduction. Based on the single factor experiment, the response surface method is applied to process optimization of the results. The optimized results show that the best reduction effect can be obtained under the condition of anthracite particle size-115 meshes. Under the reduction condition of reduction temperature 1080℃,reduction time 1.5 h, carbon quantity 23%, and anthracite particle size-115 mesh, direct reduced iron with metallization rate of 98.60% can be obtained.
In order to explore the effect of anthracite particle size on direct reduction of hematite, the direct reduction experiment is carried out to investigate the effect of reduction time, temperature and amount of reductant on the direct reduction. Based on the single factor experiment, the response surface method is applied to process optimization of the results. The optimized results show that the best reduction effect can be obtained under the condition of anthracite particle size-115 meshes. Under the reduction condition of reduction temperature 1080℃,reduction time 1.5 h, carbon quantity 23%, and anthracite particle size-115 mesh, direct reduced iron with metallization rate of 98.60% can be obtained.
引文
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[3]朱德庆,翟勇,潘建.煤基直接还原——磁选超微细贫赤铁矿新工艺[J].中南大学学报(自然科学版),2008(6):1132-1138.
[4]彭志坚,罗浩,黎应君,等.巴西赤铁矿富矿粉直接还原试验研究[J].武汉科技大学学报(自然科学版),2007(4):338-341.
[5]沈慧庭,周波,黄晓毅.难选鲡状赤铁矿焙烧磁选和直接还原工艺的探讨[J].矿冶工程,2008(5):30-34.
[6]李广涛,张宗华,张呈.某高磷鲡状赤褐铁矿的焙烧磁选试验研究[J].矿业快报,2008(1):27-30.
[7]刘永鹤,彭金辉,等.莫来石晶须长径比影响因素的响应曲面法优化[J].硅酸盐学报,2011(3):403-408.
[8]王冰芳,张学武.响应曲面法优化西兰苔总黄酮的提取工艺条件[J].安徽农业科学,2010(1):359-362.