Inorganic Chemicals Industry >
Study on removal of silicon from high-silicon brucite by sodium roasting method
Received date: 2020-04-12
Online published: 2020-11-24
A sodium-roasting process was employed for removing silicon from high-silicon brucite as raw material,using NaOH as sodium treatment reagent.The effects of NaOH content,roasting temperature and roasting time etc.on Si content of the water-washed roasting products were investigated,respectively.The structure and spectroscopic characteristics of roasting products and the water-washed residues in different roasting temperature were analyzed.The mechanism of removing silicon from high-silicon brucite by sodium-roasting process was revealed.The results indicated that optimal processing parameters were roasting temperature of 650 ℃,3 times theoretical amount of NaOH and roasting time of 3 h.Under these conditions,Na+ substituted Mg2+ of Mg2SiO4 obtained by serpentine decomposition,and the final products were Na4SiO4.The mass fraction of Si in water washed roasting products reached 1.89% and the extraction ratio of Si reached 90.1%.
Key words: high-silicon brucite; sodium roasting; serpentine; silicon removal
Xiaowang Du , Jianchu Zhong , Xiaotian Wang . Study on removal of silicon from high-silicon brucite by sodium roasting method[J]. Inorganic Chemicals Industry, 2020 , 52(10) : 92 -95 . DOI: 10.11962/1006-4990.2019-0634
[1] | 秦雅静, 朱德山. 我国水镁石矿资源利用现状及展望[J]. 中国非金属矿工业导刊, 2014(6):1-3. |
[2] | 符剑刚, 王晖, 陈立, 等. 从镍蛇纹石矿石中浸出Ni,Mg的试验研究[J]. 湿法冶金, 2008(2):92-95. |
[3] | 宋鹏程, 彭同江, 孙红娟, 等. 纤蛇纹石石棉尾矿综合利用新进展[J]. 中国非金属矿工业导刊, 2016(2):14-17,23. |
[4] | 宋贝, 刘超, 郑水林, 等. 用蛇纹石硫酸铵焙烧法制备超细氢氧化镁的研究[J]. 非金属矿, 2013,36(3):63-65. |
[5] | 宋鹏程, 彭同江, 孙红娟, 等. 纤蛇纹石焙烧去金属氧化物制备纤维状二氧化硅[J]. 硅酸盐学报, 2015,43(5):692-698. |
[6] | 余玉操, 彭同江, 孙红娟, 等. 温石棉尾矿酸法焙烧产物提取氧化镁的研究[J]. 非金属矿, 2016,39(2):1-4. |
[7] | 李学军. 天然蛇纹石活性机理初探[C]// 中国地质学会.第二届全国环境矿物学学术研讨会论文集, 2004: 67-71. |
[8] | Teixeira A P C, Santos E M, Vieira A F P, et al. Use of chrysotile to produce highly dispersed K-doped MgO catalyst for biodiesel synjournal[J]. Chemical Engineering Journal, 2013,232:104-110. |
[9] | Ballotin F C, Cibaka Thérèse Ebambi, Ribeiro-Santos T A, et al. K2MgSiO4:A novel K+-trapped biodiesel heterogeneous catalyst produced from serpentinite Mg3Si2O5(OH)4[J]. Journal of Molecular Catalysis A:Chemical, 2016,422:258-265. |
[10] | 李世青, 巩媛媛, 赵文娟. 蛇纹石石棉煅烧改性研究[J]. 矿产综合利用, 2008(3):25-27. |
[11] | 徐敏. 碱分解含镁硅酸盐的光谱学研究[D]. 沈阳:东北大学, 2014. |
[12] | Wu X F, Hu G S, Wang B B, et al. Synjournal and characterization of superfine magnesium hydroxide with monodispersity[J]. Journal of Crystal Growth, 2008,310(2):457-461. |
[13] | 秦宏宇, 刘瑞. 吉林通化集安蛇纹石质玉的矿物成分与成因分析[J]. 岩石矿物学杂志, 2016,35(2):344-348. |
[14] | 谢晶曦, 常俊标, 王绪明. 红外光谱在有机化学和药物化学中的应用[M]. 北京: 科学出版社, 2001. |
[15] | Roda M, Paluszkiewicz C. The structural role of alkaline earth ions in oxyfluoride aluminosilicate glasses—Infrared spectroscopy study[J]. Vibrational Spectroscopy, 2008,48(2):246-250. |
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