Reaction Process Analysis of SiO2 and Zn2SiO4 Roasting with Molten NaOH

doi:10.12068/j.issn.1005-3026.2017.01.011

Journal of Northeastern University Natural Science ›› 2017, Vol. 38 ›› Issue (1): 51-56.DOI: 10.12068/j.issn.1005-3026.2017.01.011

• Materials & Metallurgy • Previous Articles Next Articles

Reaction Process Analysis of SiO₂and Zn₂SiO₄Roasting with Molten NaOH

SHEN Xiao-yi^1,2， JIA Chao-hang^1,2， LI Hao^1,2， WU Kang-long^1,2

1. School of Metallurgy， Northeastern University， Shenyang 110819， China; 2. Liaoning Key Laboratory for Metallurgical Sensor & Technology， Shenyang 110819， China.

Received:2016-02-11 Revised:2016-02-11 Online:2017-01-15 Published:2017-01-13
Contact: SHEN Xiao-yi
About author:-
Supported by:
-

Abstract

Abstract: Employing homemade SiO₂ and analytic Zn₂SiO₄ as raw materials and NaOH as reaction medium， the influences of reaction temperature， molar ratio of NaOH to SiO₂ and reaction time on the extraction ratio of silica were investigated. The appropriate reaction conditions were obtained as reaction temperature of 450℃， molar ratio of NaOH to SiO₂ of 2.4∶1 and reaction time of 60min. Silica reacted with NaOH to form Na₂SiO₃ at first and then was transformed into Na₄SiO₄ along with temperature rising. The appropriate reaction conditions of Zn₂SiO₄ roasting were reaction temperature of 500℃， molar ratio of NaOH to Zn₂SiO₄ of 20∶1 and reaction time of 150min. Na₂ZnSiO₄ and Na₂ZnO₂ were formed when Zn₂SiO₄ reacted with NaOH. Silicon oxygen tetrahedron reacted with NaOH to form Na₂SiO₃ when the roasting temperature reached 350℃， and then Na₂SiO₃ was transformed into Na₄SiO₄.

Key words: zinc oxide ore, SiO₂, Zn₂SiO₄, molten NaOH roasting, reaction process

CLC Number:

TF813

SHEN Xiao-yi， JIA Chao-hang， LI Hao， WU Kang-long. Reaction Process Analysis of SiO₂and Zn₂SiO₄Roasting with Molten NaOH[J]. Journal of Northeastern University Natural Science, 2017, 38(1): 51-56.

References

[1]Li C X，Xu H S，Deng Z G，et al.Pressure leaching of zinc silicate ore in sulfuric acid medium ［J］.Transactions of Nonferrous Metals Society of China，2010，20(5):918-923.
[2]邵鸿媚，申晓毅，张彬彬，等.氧化锌矿溶出液的净化［J］.东北大学学报(自然科学版)，2015，36(6):811-814.(Shao Hong-mei，Shen Xiao-yi，Zhang Bin-bin，et al. Purification of the digestion solution of zinc oxide ores ［J］. Journal of Northeastern University(Natural Science)，2015，36(6):811-814.)
[3]Chen A L，Zhao Z W，Jia X J，et al. Alkaline leaching Zn and its concomitant metals from refractory hemimorphite zinc oxide ore ［J］.Hydrometallurgy，2009，97(3/4):228-232.
[4]Safari V，Arzpeyma G，Rashchi F，et al.A shrinking particle-shrinking core model for leaching of a zinc ore containing silica ［J］.International Journal of Mineral Processing，2009，93(1):79-83.
[5]Xu H S，Wei C，Li C X，et al.Sulfuric acid leaching of zinc silicate ore under pressure ［J］.Hydrometallurgy，2010，105(1/2):186-190.
[6]Feng L Y，Yang X W，Shen Q F，et al. Pelletizing and alkaline leaching of powdery low grade zinc oxide ores ［J］.Hydrometallurgy，2007，89(3/4):305-310.
[7]Babu M N，Sahu K K，Pandey B D.Zinc recovery from sphalerite concentrate by direct oxidative leaching with ammonium，sodium and potassium persulphates ［J］.Hydrometallurgy，2002，64(2):119-129.
[8]Sun Y，Shen X Y，Zhai Y C.Thermodynamics and kinetics of extracting zinc from zinc oxide ore by ammonium sulfate roasting method ［J］. International Journal of Minerals，Metallurgy and Materials，2015，22(5):467-475.
[9]Chen Q Y，Li L A，Bai L，et al. Synergistic extraction of zinc from ammoniacal ammonia sulfate solution by a mixture of a sterically hindered beta-diketone and tri-n-octylphosphine oxide (TOPO) ［J］.Hydrometallurgy，2011，105(3/4):201-206.
[10]王志猛，谢宏伟，张懿，等.电动势法测量Na₂PbO₂和Na₂ZnO₂生成自由能［J］.中国有色金属学报，2015，25(11):3216-3222.(Wang Zhi-meng，Xie Hong-wei，Zhang Yi，et al. Formation free energy of Na₂PbO₂ and Na₂ZnO₂ measured by electromotive force method ［J］.The Chinese Journal of Nonferrous Metals，2015，25(11):3216-3222.)(上接第30页)表2轨迹误差率对照表Table 2Comparison table of trajectory error rate %识别方法X轴Y轴Z轴均值TRM 8.427.499.378.43时域积分方法18.4721.1617.8719.17实验结果表明，本文提出的TRM轨迹识别方法无论在单个轴向上的位移误差，还是3个轴向位移误差的均值，误差率都比使用时域积分的轨迹识别方法小，并且TRM轨迹识别误差均值在10%以内，低于现有方法均值水平.5结论本文针对羽毛球拍具体应用，结合羽毛球拍挥拍动作运动特点，提出一种多传感器融合的羽毛球拍挥拍轨迹识别方法.该方法通过加速度计和磁力计对陀螺仪进行修正，改进现有姿态解算方法.通过频域积分计算挥拍位移，经过典型挥拍动作测试结果表明，挥拍偏航角姿态角精度在1°以内，轨迹误差均值控制在10%以内.羽毛球拍挥拍轨迹识别精度得到明显的提高，为羽毛球动作识别技术的改进提供了高效的解决方案.

Reaction Process Analysis of SiO₂and Zn₂SiO₄Roasting with Molten NaOH

RichHTML

PDF (PC)

Knowledge

Abstract

Cite this article

share this article

References

Related Articles 5

Recommended Articles

Metrics

Comments

[1]	ZHOU Zhen-yu， TANG Ping， WEN Guang-hua， LIU Qiang. Study on Crystallization and Solidification Behaviors of CaO-SiO₂-Al₂O₃ Mold Slags with Hot Thermocouple Technique [J]. Journal of Northeastern University Natural Science, 2015, 36(7): 970-975.
[2]	WANG Yan-xiu， ZHANG Ting-an， LYU Guo-zhi， ZHU Xiao-feng. Reaction Behaviors of CaO-TiO₂-SiO₂-NaAlO₂ System [J]. Journal of Northeastern University Natural Science, 2015, 36(5): 685-689.
[3]	CHEN Sui-yuan， LIANG Jing， WELLBURN Dan， LIU Chang-sheng. Pulsed Laser Control Synthesis of Ag-SiO₂ Nano-composite Particles [J]. Journal of Northeastern University Natural Science, 2015, 36(3): 378-382.
[4]	WANG Le， MU Wenning， LIU Shaoming， ZHAI Yuchun. Roasting of Low Grade Zinc Oxide Ore by Concentrated Sulfuric Acid [J]. Journal of Northeastern University Natural Science, 2014, 35(8): 1169-1173.
[5]	FENG Yali， ZHANG Xu， LI Haoran， YANG Zhichao. Pyrolusite Leaching Reactions in FeS2MnO2H2SO4 System [J]. Journal of Northeastern University Natural Science, 2014, 35(2): 241-244.