Vanadium extraction process of Panzhihua vanadium-titanium magnetite
Vanadium from vanadium and titanium magnet magmatic ore, concentrate vanadium and titanium vanadium extraction fire smelting method and a wet method using two kinds. The fire method is to indirectly extract vanadium from vanadium-titanium concentrate or vanadium slag, and the wet method directly extracts vanadium from vanadium-titanium concentrate. At present, China mainly uses indirect vanadium extraction. Vanadium extraction process by fire method. The vanadium-titanium concentrate of the ore dressing product is directly smelted into the blast furnace or electric furnace, so that most of the vanadium in the ore enters the molten iron, and then the vanadium-bearing iron water is sent into the converter for oxygen blowing, so that the vanadium is enriched in the slag and becomes vanadium slag. The vanadium slag is calcined, leached and filtered to obtain vanadium pentoxide. The biggest advantage of this method is the high recovery of vanadium, which is especially suitable for the utilization of low-grade vanadium ore. The disadvantage is that the ore is processed in a large amount, and the production scale is small, which is incompatible with the large-scale production of the steel industry.
The process of producing ferro-vanadium slag from vanadium-titanium magnetite is shown in Figure 4.
Figure 4 Process of ferro-vanadium slag from vanadium-titanium magnetite
In the past 20 years, China has accumulated a lot of experience in the vanadium-titanium magnetite extraction process and pioneered the blast furnace ironmaking-atomization vanadium extraction method. Currently, Panzhihua Iron and Steel Co., Ltd. has used this method to mass produce vanadium slag. The characteristic of the process is that the iron is slag and rectified in the intermediate tank, and atomized in the atomizer, and the atomized molten iron enters the atomization furnace to react, and the molten iron (semi-steel) after the vanadium is introduced into the semi-steel tank, so that The vanadium slag layer is formed on the surface of the semi-steel tank, and the vanadium slag is obtained by separating the semi-steel. The vanadium slag is melted, leached and filtered to obtain a vanadium pentoxide product. See Figure 5.
Figure 5 Process of atomizing blown vanadium slag by Panzhihua Iron and Steel Company
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