含钒石煤的穆斯堡尔谱研究

MòSSBAUER SPECTROSCOPICSTUDY IN V-BEARING STONE COAL

本文收集了我国湘鄂淅地区含钒石煤样品,使用化学分析和穆斯堡尔谱方法,测定和研究了石煤中钒铁的赋存方式和价态,以及不同焙烧温度下钒铁价态变化等。初步研究表明,石煤中钒铁价态及价态变化的测定,对含钒石煤中钒铁矿物和成因研究,钒的提取和石煤的综合利用有重要意义。

Vanadium-bearing stone coal is a new kind of Vanadium resource. Six Stone Coals have been investigated by the authors with Mossbauer Spectroscopy. The Mossbauer effect has been studied with FeS2 in Tang-Wu stone coal. Analytical results show that in stone coal: Vanadium exists in two different oxidation states: V3+, V4+, and the reducing substances (pyrite) determine the oxidation states of V at low temperature. Mossbauer spectroscopic studies indicate that: below 300t pyrite doesn't be oxidized, in the range of 300-500 , 90% of pyrite is oxidized and changed to Fe2O3. Pyrite may effect on the oxidation states of Vanadium. If Pyrite decreases in stone coal then the degree for Vanadium to oxidize to V4+ would increase.