江西玉山石煤烧结包裹与钒转化的研究

SINTERING OF STONE COAL AND THE TRANSFORMATION OF VANADIUM IN YUSHAN, JIANGXI PROVINCE

江西玉山含钒石煤既是低热值能源,又是一种新类型钒矿资源。为充分利用这种资源,在600～1150℃下进行了氧化培烧和钠化焙烧,测定了煤灰的松装密度d和钒转化率η,研究厂烧结包裹作用。结果表明:温度升高,煤灰烧结严重,对钒包裹几率加大,钒转化率降低。石煤作为能源利用时,燃烧温度不宜超过950℃,石煤钠化焙烧提钒最佳温度775℃。在两种焙烧条件下的石煤烧结机理作了探讨,并进一步得出玉山石煤烧结与包裹的关系式。

<ABSTRACT> The vanadium-bearing stone coal is a kind of fuel with low calorific value, and also a new resource of vanadium in south China. In the range of 600~1150 , oxidizing roasting and NaCl roasting tests were carried out with stone coal taken from Yushan. It has been proved that the ash products are sintered during roasting, and the sintering process is in accordance with the formula of the complex sintering action; During the sintering of ash, the vanadium is locked up there in. As roasting temperature is increased, the sintering degree of ash is increased and more vanadium is locked up. so that the recovery efficiency of vanadium in roasting is decreased. The experimental work on the sintering of ash and its effect on extracting vanadium show that the best condition for complex utilization of stone coal is combustible tempera ture 950'0 . NaCl roasting temperature at 775 It has been found that the experimental formula between apparent density (d) which represents the sintering degree and vanadium extraction is described as follows; For oxidizing roasting For NaCl roasting