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The world's two major vanadium resource: vanadium-titanium magnetite and vanadium containing stone coal. Former reserves are mainly located in the Commonwealth of Independent States (CIS), the United States, South Africa, China, Norway, Sweden, the Netherlands, Canada and Australia, and in China are mainly distributed in the Panzhihua region; the latter widely distributed in several provinces of southern China coal shortage large reserves, layer is stable, high grade vanadium-containing main characteristics of ash high density, low heat, compact structure, fire point high, non-flammable and difficult to complete combustion, hard, hard grind, and mainly occur in the lower Cambrian strata. Stone coal containing less hydrocarbon, low-quality coal with low calorific value and high ash, but it is also a low-grade polymetallic ores with high utilization value. Mainly by stone coal price of different elements, the stone coal can be divided into containing vanadium, vanadium, molybdenum, vanadium, nickel, vanadium, gallium, vanadium, uranium, vanadium, selenium, vanadium, silver and other types solve the the good heat low stone coal utilization has very important strategic significance. Vanadium is an important strategic material with a high melting point, easy deformation processing and other characteristics, its use is very extensive, mainly used in the field of iron and steel industry, national defense and cutting-edge technology, chemical industry and light and textile industries. With the increasing number of the automotive industry, building materials and industrial applications such as high-strength low-alloy steel, vanadium amount will be increased dramatically. The large number of vanadium containing stone coal resources in Tongren, Guizhou and containing vanadium taste different, this paper the different grade of stone coal ore detection proposed H2S04 and R1 proportionally mixed reaction process of adding R2 normally pressure acid leaching method. Multi-element chemical analysis, differential thermal - thermal gravimetric analysis, electron microprobe analysis, scanning electron microscopy analysis means, vanadium in stone coal mine in this study were identified, mainly hosted in micas, a small amount of isomorphous phase replace Fe3 - into the oxide minerals such as iron oxide and clay mineral, a very small amount in the form of isomorphous phase substituted the A13 enters insoluble aluminosilicate phase; wherein the tetravalent, pentavalent vanadium content of more than 50% are easily leach ore . On this basis, the effects of reaction time, reaction temperature, H2SO4 dosage, reaction ratio of liquid to solid, R1 dosage amount of, R2, R2 added time and other parameters on the leaching rate of vanadium. When 35% the amount of sulfuric acid leaching temperature of 92-93 ℃, holding time 6h, the R1 the amount of 4% -6% R2 amount of 0.4%, R2 Joined join for three hours after constant liquid to solid ratio 2:1, with vanadium 0.314%, 0.78%, 1.97% three stone coal vanadium leaching rate can reach 89%, 87%, 91%, respectively. Compare different vanadium-containing grade stone coal mine leaching the influence of various parameters on the leaching rate of vanadium regularity. The results show that: the impact of different grade of stone coal leaching parameters on the leaching rate of vanadium law is basically the same. To further verify the stability of the leaching, select the optimum parameters for the six kilograms expand experimental vanadium leaching rate of not less than 85%, consistent with a small test. The process has a simple operation, adaptability, and a wide range of applications, less investment in equipment, short process, and lower costs.
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