基于气基直接还原-熔分的硼铁矿高效利用新工艺

doi:10.12068/j.issn.1005-3026.2016.06.010

东北大学学报:自然科学版 ›› 2016, Vol. 37 ›› Issue (6): 805-809.DOI: 10.12068/j.issn.1005-3026.2016.06.010

基于气基直接还原-熔分的硼铁矿高效利用新工艺

储满生，赵嘉琦，付小佼，柳政根

(东北大学冶金学院，辽宁沈阳110819)

收稿日期:2015-04-09 修回日期:2015-04-09 出版日期:2016-06-15 发布日期:2016-06-08
通讯作者: 储满生
作者简介:储满生(1973-)，男，安徽岳西人，东北大学教授，博士生导师.
基金资助:
教育部博士学科点专项科研基金资助项目(20100042110004)；中央高校基本科研业务费专项资金资助项目(N110202001，N140206003).

New Efficient Process Utilizing Ludwigite on Gas-based Shaft Furnace Direct Reduction and Electric Furnace Smelting Separation

CHU Man-sheng， ZHAO Jia-qi， FU Xiao-jiao， LIU Zheng-gen

School of Metallurgy， Northeastern University， Shenyang 110819， China.

Received:2015-04-09 Revised:2015-04-09 Online:2016-06-15 Published:2016-06-08
Contact: CHU Man-sheng
About author:-
Supported by:
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摘要/Abstract

摘要： 实验室条件下，以含硼铁精矿为原料制备氧化球团，对含硼铁精矿气基竖炉直接还原-电炉熔分新工艺进行了研究.结果表明，含硼铁精矿是良好的造球原料，1200℃下焙烧20min后，成品球团抗压强度可达2500N以上，满足气基竖炉直接还原工艺要求.在H₂与CO体积比大于2/5且温度在850~1000℃条件下，含硼铁精矿氧化球团还原率达到95%的时间为15~60min，还原膨胀率不高于15%.在高温下电热熔化DRI后硼和铁可以高效分离，硼、铁收得率均可达到98%以上，富硼渣中B₂O₃的质量分数在21%以上，活性可达89%左右，是“一步法”生产硼酸的优良原料.含硼铁精矿气基竖炉直接还原电炉熔分新工艺可以实现硼铁高效分离和清洁利用.

关键词: 含硼铁精矿, 气基竖炉, 直接还原, 电炉熔分, 清洁利用

Abstract: In this work， oxide pellet was prepared from boron-bearing iron concentrate. A new process that the boron-bearing iron concentrate was directly reduced and separated by shaft furnace and electric furnace smelting， respectively. The corresponding reduction and separation theories were discussed. The results showed that boron-bearing iron concentrate pelletization can fully meet the requirements of the gas-based shaft furnace direct reduction process. After boasting at 1200℃ for 20minutes， the compressive strength of the finished pellet is higher than 2500N. When the H₂ to CO ratio is higher than 2/5 and the temperature is between 850℃ to 1000℃， the time for reducing 95% of the boron-bearing iron concentrate is between 10min to 60min and the expansion ratio is less than 15%. Boron and iron can be efficiently separated from DRI by electric furnace at 1500℃. The yields of both boron and iron can achieve up to 98%. The activity and the mass fraction of B₂O₃ in the slag can reach 89% and 21%， respectively， suggesting that this kind of slag can be used as high quality raw materials for the one-step boric acid production. The new process can efficiently separate and cleanly utilize boron-bearing iron concentrate.

Key words: boron-bearing iron concentrate, gas-based shaft furnace, direct reduction, electric furnace smelting separation, clean utilization

中图分类号:

TF046.6

储满生，赵嘉琦，付小佼，柳政根. 基于气基直接还原-熔分的硼铁矿高效利用新工艺[J]. 东北大学学报:自然科学版, 2016, 37(6): 805-809.

CHU Man-sheng， ZHAO Jia-qi， FU Xiao-jiao， LIU Zheng-gen. New Efficient Process Utilizing Ludwigite on Gas-based Shaft Furnace Direct Reduction and Electric Furnace Smelting Separation[J]. Journal of Northeastern University Natural Science, 2016, 37(6): 805-809.

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基于气基直接还原-熔分的硼铁矿高效利用新工艺

New Efficient Process Utilizing Ludwigite on Gas-based Shaft Furnace Direct Reduction and Electric Furnace Smelting Separation

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