常压碱浸出提硼的工艺研究
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摘要
含硼尾矿是铁硼镁矿选铁后的尾矿,回收其中的硼元素是目前亟待解决的问题,常压碱浸出提硼工艺有操作安全、无杂质引入的优势。本文采用常压、苛性钠浸出的方法提取硼,研究了浸出温度、时间、碱质量分数、液固比、搅拌速度以及矿样粒度对浸出率的影响。当浸出温度为100℃,时间为4h,碱质量分数为16%,液固比为5∶1,搅拌速度为180r/min,矿样粒度为100目(0.147mm)时,浸取率可达到82.2%左右。
The boron bearing tailing is a kind of tailings after iron boron magnesium ore is enriched iron and recovery of boron element is a problem to be solved currently.The advantage of atmospheric pressure alkaline leaching process on boron extracting is safe operation without introducing impurities.This paper adopts the method of atmospheric pressure and caustic soda leaching for extracting boron and studies the influence of leaching temperature,time,alkali concentration,solid-liquid ratio,rotation speed and ore sample particle size on leaching rate.With temperature being 100 ℃,time 4 hours,alkali concentration16%,liquid-solid ratio 5∶1,stirring speed 180r/min and ore sample size 100 mesh,the leaching rate can be up to 82.2%.
The boron bearing tailing is a kind of tailings after iron boron magnesium ore is enriched iron and recovery of boron element is a problem to be solved currently.The advantage of atmospheric pressure alkaline leaching process on boron extracting is safe operation without introducing impurities.This paper adopts the method of atmospheric pressure and caustic soda leaching for extracting boron and studies the influence of leaching temperature,time,alkali concentration,solid-liquid ratio,rotation speed and ore sample particle size on leaching rate.With temperature being 100 ℃,time 4 hours,alkali concentration16%,liquid-solid ratio 5∶1,stirring speed 180r/min and ore sample size 100 mesh,the leaching rate can be up to 82.2%.
引文
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[2]郑学家.硼镁矿加工(第一版)[M].北京:化学工业出版社,2009,40-41.
[3]李杰,樊占国.富硼渣钠化法制备硼砂的实验研究[J].材料科学与工艺,2011,(1):144-148.
[4]Li J,Lei L,Wang L J,et al.Study on preparation of boric acid from boric acid using sulfuric acid method[J].Journal of the Chinese Rare Earth Society,2010,28:680-683.
[5]郑学家.中国硼砂工业生产的技术创新[J].无机盐工业,2013,(1):1-3.
[6]董亚萍.以西藏硼镁矿常压碱解制取硼砂工艺在青海格尔木投产[J].盐湖研究,1997,5(1):58.
[7]宋丽.富硼渣常压碱浸及浸出液净化结晶硼砂的研究[D].东北大学,2013,76.
[8]薛向欣,等.富硼渣常压碱解浸出液的净化及硼砂制备[J].东北大学学报(自然科学版),2015,(6):786-789.
[9]郎建峰,李炳焕,曹文华.富硼渣的碱解反应及活性评价方法的研究[J].河北化工,1997,(2):16-17.
[10]李炳焕,曹文华.碱解法从硼铁矿中提取硼的研究[J].化学工程师,2002,(2):13-15.
[11]张丽清,朱建新,刘素兰,等.MgSO4-H2O体系高温结晶动力学研究[J].沈阳化工学院学报,1999,13(2):147-149.