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Relationships between Physicochemical Properties and Chemical Compositions of Zeolite Ores

Author: LiuZuoZuo
Tutor: ZhangShouTing
School: Chinese Geology University (Beijing)
Course: Mineral prospecting and exploration
Keywords: Zeolite Physical and Chemical Properties Chemical composition Relationship Evaluation of mineral resources
CLC: P574.2
Type: PhD thesis
Year: 2011
Downloads: 171
Quote: 0
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Abstract


In this study, using the Heilongjiang Muling zeolite mine high-grade clinoptilolite and mordenite for the study, a detailed analysis of the relationship between the chemical composition of the ore with four physical and chemical properties, including ion exchange, adsorption, thermal stability and acid resistance . Research has focused on the data, the physical and chemical principles, results of the analysis of the combination of the relevant laws of the obtained theoretical significance and role in guiding the development and application of zeolite minerals, which provides a theoretical basis for the rapid prediction and evaluation of local and even national type zeolite mineral resources and assurance, analysis of ideas and methods also provide a new reference and pioneering means for resource evaluation studies. Active cations (K, Na, Ca, Mg) content mainly determines the exchange and adsorption of the zeolite, the Si / Al values ??determine the thermal stability and acid resistance. This paper analyzes the two zeolite chemical composition characteristics; the active cation content of K , the NH4 exchange capacity; parameters like (MgO CaO) The / K 2 O MgO / K the 2 O with an acidic gas and water vapor adsorption amount of the relationship; after heating the changes in the zeolite type of the absorbent capacity and the Si / Al of relations; relationship between weight loss rate and crystallinity changes in the acid leaching with Si / Al; factors affect the physical and chemical properties of natural zeolite and rare earth elements, trace elements geochemistry indicates significance. Study area produced high silica natural clinoptilolite and mordenite Na-rich, SiO 2 / Al 2 O 3 greater than 8, most greater than 9. Activities within the mordenite total cation and ion exchange capacity (K and NH 4 ) increasing relationship significantly clinoptilolite slightly worse, The reason may be that the influence of the the pore the ion clogging role and montmorillonite. Acidic gas adsorption experiments found that clinoptilolite and mordenite the H 2 S and SO 2 strong adsorption exclusive of CO 2 weak. The the parameters (MgO CaO) / K 2 O MgO / K the 2 O and acidic gas adsorption law is weak, but the adsorption of water vapor its is an increasing function of the relationship. Thermal stability and acid resistance by the the SiO 2 / Al 2 O 3 values ??impact. Better than clinoptilolite for heating the moisture absorption capacity, mordenite, clinoptilolite is stable up to 400 ℃, mordenite stable to about 800 ℃. Rich in K and Na may be the better one of the factors of the thermal stability of the mordenite. For the acid leaching after the weight loss rate and the degree of crystallinity, the mordenite is superior clinoptilolite, the ability to 4M HCl does not occur off Al, and in 4M HCl role absorbent ability. Two high-silica zeolite in a 10M HCl after still maintain a degree of crystallinity of more than 80%, higher than the clinoptilolite in 12M HCl role, the degree of crystallinity retained by the mordenite. The microelements of the alkali and alkaline earth metal element (Rb, Cs, Sr, Ba) may be used for indicating that the cation content of the ore, Th U value is used to reveal the type of the original rock. This study will broaden and deepen the understanding of how to play to the advantages of its application of zeolite, and the zeolite mineral resources in the ground and even nationwide rapid assessment has the role of guiding.

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CLC: > Astronomy,Earth Sciences > Geology > Mineralogy > The physical chemistry of the mineral > Chemical composition
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