ISSN:
1573-9139
Source:
Springer Online Journal Archives 1860-2000
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
Conclusions For the majority of the dolomites from the Satkinsk group of deposits investigated there is typically a high concentration of magnesium oxide, a low concentration of sesquioxides, and a weight ratio of CaO∶MgO close to 1.4, and a high density. A finely crystalline structure of the dolomites is the most common. The rates of dissociation and sintering of Satkinsk dolomites vary depending on their structure and the quantity of impurities, especially those containing sesquioxides. Dolomites in the form of grains containing more than 0.8% R2O3 sinter at 1700°C in 35 min; for the sintering of dolomite with lower concentrations of sesquioxides it is necessary to use burning temperatures of 1750–1800°C. The Satkinsk magnesites are irregular in chemical composition and structure. The magnesites of the Volch'egorsk, Palenikhinsk, and Berezovsk deposits are characterized by a high concentration of calcium oxide and a comparatively moderate concentration of silica; the magnesites from the Gologorsk Karginsk, Mel'nichnii, and Nikol'sk deposits are distinguished by a high concentration of silica, and unless enriched, are not very suitable for the production of high-quality refractories. Magnesites with coarse and average crystalline structures are most commonplace in the Satkinsk group of deposits. The physicochemical properties and the rates of dissociation and sintering of magnesites vary as a function of their structure and impurity concentrations. The sintering of magnesites depends mainly on the content of silica and the CaO∶SiO2 ratio.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF01285783
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