铅精矿吸湿平衡数学模型研究
Study on Moisture Adsorption Equilibrium Model of Lead Concentrate

作者: 余 刚 :长沙有色冶金设计研究院有限公司,长沙; 马 骥 , 匡至望 :中南大学能源科学与工程学院,长沙; 廖 舟 :株洲冶炼集团股份有限公司,株洲;

关键词: 铅精矿物料等温吸湿模型相关性分析Langmuir模型Lead Concentrate Isotherms Equilibrium Adsorption Model Correlation Analysis Langmuir Model

摘要:
为了探究并建立更加适用于铅精矿贮存运输过程中的吸湿平衡模型,本文基于铅精矿物料在不同温度、相对湿度和粒径条件下进行的吸附空气中水分实验,结合相关性分析探讨了温湿度、粒径条件对平衡吸湿量的影响,结果表明温度和相对湿度与平衡吸湿量的相关度分别达到−0.927和0.932,为决定性因素。进而基于Langmuir等温吸湿模型,引入温度变量,通过理论推导与经验分析两种途径,分别提出了受温度、湿度共同影响的两种修正Langmuir模型。结合两种模型对实验数据的拟合分析与比较,表明在温度为20℃~80℃和相对湿度为45%~95%的实验条件下,基于经验法修正后的Langmuir吸湿平衡模型可以更为准确地描述铅精矿物料吸湿性能,可以在一定程度上计算生产过程中铅精矿物料的平衡吸湿量。

Abstract: In order to build a more applicative moisture adsorption equilibrium model of lead concentrate, the partial correlation analysis of different factors to moisture adsorption content is conducted basing on the previous experimental works. It shows that the temperature and relative humidity, the correlations are −0.927 and 0.932 respectively, are decisive factors. And then, based on the original Langmuir equilibrium adsorption model, two modified Langmuir models are built by theoretical and empirical methods, which are controlled by the temperature and relative humidity. The analysis and comparison of two models shows that the empirical modified Langmuir equilibrium model is more applicative to the lead concentrates under the 20˚C - 80˚C of temperature and 45% - 95% of RH. So, the empirical modified Langmuir equilibrium model can be employed to calculate the moisture adsorption content of lead concentrates in the industry to some extent.

文章引用: 余 刚 , 马 骥 , 廖 舟 , 匡至望 (2014) 铅精矿吸湿平衡数学模型研究。 冶金工程, 1, 70-76. doi: 10.12677/MEng.2014.13010

参考文献

[1] Dada, A.O., Olalekan, A.P., Olatunya, A.M. and Dada, O. (2012) Langmuir, Freundlich, Temkin and Dubi-nin-Radushkevich isotherms studies of equilibrium sorption of Zn2+ unto phosphoric acid modified rice husk. ApplChem, 3, 38-45.

[2] Zhang, M., Wang, R., Guo, W., Xue, T. and Dai, J. (2014) Adsorption on three contrasting Chinese soils treated with two sources of dissolved organic matter: I. Langmuir and Freundlich isotherm evaluation. Soil and Sediment Contamination Mercury (II): An International Journal, 23, 49-62.

[3] Yang, R.T. (1997) Gas separation by adsorption processes. Imperial College Press, London, 156-161.

[4] Nounou, M.N. and Nounou, H.N. (2010) Multiscale estimation of the Freundlich adsorption isotherm. International Journal of Environmental Science & Technology, 7, 509-518.

[5] Campbell, L.S. and Davies, B.E. (1995) Soil sorption of caesium modelled by the Langmuir and Freundlich isotherm equations. Applied Geochemistry, 10, 715-723.

[6] Vadi, M., Mansoorabad, A.O., Mohammadi, M. and Rostami, N. (2013) Investigation of Langmuir, Freundlich and Temkin adsorption isotherm of tramadol by multi-wall carbon nanotube. Asian Journal of Chemistry, 25, 5467-5469.

[7] 谭艳芝, 王秀芳, 钟国英 (2010) 新型竹活性炭对水体违禁药物孔雀石绿吸附性能的影响. 中南大学学报(自然科学版), 41, 1287-1291.

[8] Xia, L.X., Shen, Z., Vargas, T., Sun, W.J., Ruan, R.M., Xie, Z.D. and Qiu, G.Z. (2013) Attachment of Acidithiobacillus ferrooxidans onto different solid substrates and fitting through Langmuir and Freundlich equations. Biotechnology Letters, 35, 2129-2136.

[9] 胡岳华, 周苏阳, 孙伟, 陈攀 (2012) 铝土矿反浮选新型捕收剂TR浮选性能及机理. 中南大学学报(自然科学版), 43, 1206.

[10] Diya’uddeen, B.H. (2013) Comparison of BET and water adsorption techniques. American Journal of Engineering and Applied Sciences, 6, 282-285.

[11] Pantuso, F.S. (2014) A BET approach to multiayer adsorption in swelling products. Journal of Food Engineering, 122, 68-71.

[12] Jahandar Lashaki, M., Fayaz, M., Niknaddaf, S. and Hashisho, Z. (2012) Effect of the adsorbate kinetic diameter on the accuracy of the Dubinin-Radushkevich equation for modeling adsorption of organic vapors on activated carbon. Journal of Hazardous Materials, 241, 154-163.

[13] Jeppu, G.P. and Clement, T.P. (2012) A modified Langmuir-Freundlich isotherm model for simulating pH-dependent adsorption effects. Journal of Contaminant Hydrology, 129, 46-53.

[14] 周萍, 匡至望, 夏中卫, 廖舟 (2012) 温湿度与粒径对铅精矿吸湿性影响的实验研究. 热科学与技术, 11, 307- 311.

[15] Ali, W. and Hussain, M. (2013) Evaluation of Freundlich and Langmuir isotherm for potassium adsorption phenomena. Inter-national Journal of Agriculture and Crop Science, 6, 1048-1054.

[16] 马伟 (2011) 固水界面化学与吸附技术. 冶金工业出版社, 北京, 160-161.

分享
Top