Title :
The modification of natural minerals
Author :
Godimchuk, A.Y. ; llyin, A.R.
Author_Institution :
High Voltage Res. Inst., Russia
Abstract :
The aim of the present work was to analyze the structural and chemical transformations in natural minerals with an increase in temperature. The natural calcium-magnesia minerals of silicate and carbonate rocks were selected for study. The series of minerals "quartz-wollastonite-marble-diopside-dolomite-tremolite" allows to learn principles of phase composition change and structure from SiO2 (100%) up to CaCO3 (100%). The results of EM have shown, that heat treatment lead to destruction of needle-like structure of tremolite crystals. The dates of DTA also testified as changes in tremolite composite. Endothermic effect at 830 degC and simultaneous decreasing of sample mass to 12% testified as process of calcite disintegration.
Keywords :
heat treatment; quartz; rocks; surface treatment; CaCO3; SiO2; calcite disintegration; chemical transformations; endothermic effect; heat treatment; natural calcium-magnesia minerals; quartz-wollastonite-marble-diopside-dolomite-tremolite; tremolite composite; Chemicals; Crystals; Electrons; Heat treatment; Heating; Impurities; Iron; Minerals; Surface treatment; Voltage;
Conference_Titel :
Modern Techniques and Technologies, 2003. MTT 2003. Proceedings of the 9th International Scientific and Practical Conference of Students, Post-graduates and Young Scientists
Conference_Location :
Tomsk
Print_ISBN :
0-7803-7669-2
DOI :
10.1109/SPCMTT.2003.1438183
