钙化焙烧对富硼渣活性的影响研究
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摘要
富硼渣是一种重要的含硼资源,富硼渣中硼的利用是急需解决的问题。富硼渣碳碱法提取渣中的硼需要富硼渣具有较好的活性,但是硼铁矿火法分离后的富硼渣活性较低。本文采用富硼渣钙化焙烧的方法来提高其活性,考察了钙化剂用量、焙烧温度、焙烧时间等因素对富硼渣活性的影响。在本实验条件下,Ca(OH)2为钙化剂时最佳的加入量为m(Ca(OH)2)/m(SiO2)为2∶1,CaCO3为钙化剂时最佳的加入量为m(CaCO3)/m(SiO2)为1∶1;最佳的钙化焙烧温度为900℃,最佳的焙烧时间为1.5h,富硼渣活性最高可达到81.4%。
Boron-rich slag can be used as an important boron resource.Utilization of boron in boron-rich slag is an urgent issue.It is required to have high activity of boron-rich slag for extracting boron by carbon alkali method.However,the boron-rich slag separated from ludwigite has lower activity.The influences of amount of calcification agent,roasting temperature and roasting time on the activity of boron-rich slag are investigated.The investigation finds that the optimum parameters obtained are amount of Ca(OH)2being 2∶1of m(Ca(OH)2)/m(SiO2);amount of CaCO31∶1of m(CaCO3)/m(SiO2);roasting temperature 900 ℃ and roasting time 1.5h.The activity of boron-rich slag can reach 81.4%.
Boron-rich slag can be used as an important boron resource.Utilization of boron in boron-rich slag is an urgent issue.It is required to have high activity of boron-rich slag for extracting boron by carbon alkali method.However,the boron-rich slag separated from ludwigite has lower activity.The influences of amount of calcification agent,roasting temperature and roasting time on the activity of boron-rich slag are investigated.The investigation finds that the optimum parameters obtained are amount of Ca(OH)2being 2∶1of m(Ca(OH)2)/m(SiO2);amount of CaCO31∶1of m(CaCO3)/m(SiO2);roasting temperature 900 ℃ and roasting time 1.5h.The activity of boron-rich slag can reach 81.4%.
引文
[1]何丹,仲剑初,王洪志,等.富硼渣钙化焙烧研究[J].化工矿物与加工,2010,(6):13-16.
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[4]陈吉,刘素兰,张显鹏.富硼渣碳碱法制取硼砂[J].东北大学学报:自然科学版,1996,17(5):508-511.
[5]战洪仁,樊占国,姜晓峰,等.富硼高炉渣中遂安石相的析出行为[J].江苏大学学报(自然科学版),2011,32(1):47-50.
[6]P.X.Zhang,Z.T.Sui,D.M.Luo.Study on crystallization kinetics of component containing boron in MgO-B2O3-SiO2-Al2O3-CaO slag[J].Chinese Journal of Materials Research,1995,9(1):66-70.
[7]战洪仁,刘素兰,樊占国.富硼渣冷却速率与活性的关系[J].东北大学学报(自然科学版),2007,28(11):1604-1607.
[2]龚殿婷,李凤华,刘素兰,等.硼酸的生产应用现状及市场前景[J].化学工业与工程技术,2007,28(6):50-53.
[3]郑学家.硼铁矿加工[M].北京:化学工业出版社,2009,170-178.
[4]陈吉,刘素兰,张显鹏.富硼渣碳碱法制取硼砂[J].东北大学学报:自然科学版,1996,17(5):508-511.
[5]战洪仁,樊占国,姜晓峰,等.富硼高炉渣中遂安石相的析出行为[J].江苏大学学报(自然科学版),2011,32(1):47-50.
[6]P.X.Zhang,Z.T.Sui,D.M.Luo.Study on crystallization kinetics of component containing boron in MgO-B2O3-SiO2-Al2O3-CaO slag[J].Chinese Journal of Materials Research,1995,9(1):66-70.
[7]战洪仁,刘素兰,樊占国.富硼渣冷却速率与活性的关系[J].东北大学学报(自然科学版),2007,28(11):1604-1607.