South Africa Transvaal Bush Vader igneous about 2 billion t of vanadium and titanium magnetic iron ore. The main ore layer contains about 1.5% V 2 O 5 , 54% to 60% Fe and 12% to 14% TiO 2 . Transvaal's Witbank Vanadium Plant Its raw materials are as follows: ingredient Fe V 2 O 5 TiO 2 Al 2 O 3 Cr 2 O 3 % 50~60 ~2.5 8~20 1 to 9 ~1.0 The production process is shown in Figure 1. The ore is ground to 70%-200 mesh, dehydrated, and added with soda ash, salt, and thenardite , oxidized and calcined at 1200 ° C in a rotary kiln. The discharged HCl gas is first sprayed with water, then neutralized with ammonia, and subjected to cyclic absorption, and NH 4 Cl reaches 150 to 180 g/L, and is used as a vanadium sinking agent. The calcined material has a large specific porosity and is leached by percolation with water. The leachate was subjected to precipitation of vanadium with NH 4 Cl to obtain ammonium metavanadate. Ammonium metavanadate was dried at 50 ° C and was white crystals and sold as a product. Further calcination and deamination to obtain red vanadium oxide as a catalyst. Further melting, can be made into a fuse sold, the ingredients are as follows: ingredient V 2 O 5 Na 2 O SiO 2 Fe As P S Ammonium metavanadate /% 77.1 0.1 0.1 0.05 0.01 0.01 0.01 Red vanadium oxide foil /% 99.3 0.2 0.2 0.2 0.01 0.01 0.01 Figure 1 South Africa Witbank plant process From ore to product, the total yield of vanadium is about 60%. After the vanadium-vanadium solution is evaporated and concentrated, NaCl can be precipitated, and the NH 4 Cl mother liquor can be returned to use. Hot Air Fryer,Kitchen Appliance,Mini Water Dispenser,Non Electric Water Dispenser Yiwu Waterfilter Industry And Trade Co.,ltd , https://www.dancertrade.com
Witbank Vanadium Plant in Transvaal, South Africa
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