Novel industrialization method for comprehensive utilization of vanadium ferrotitanium ore concentrate

Abstract

The invention relates to a novel industrialized method for comprehensively utilizing vanadium titanium iron ore concentrate. Raw material, an additive and a solid reducing agent are made into a higher-density round ingot through a full automatic press after being mixed evenly by an edge mill; the mixed material is charged into a gradient alloy can and is directly reduced in a tunnel kiln; and after being crushed, the reduced ingot is ground and is magnetically separated to obtain high-quality sponge iron with 92 to 96 percent of TFe and material containing abundant vanadium and titanium with 2.8 to 3.4 percent of V2O5 and 48 to 49 percent of TiO2. After being cold formed, the sponge iron is used for electric steelmaking or is sold as iron powder through deep processing. The material containing abundant vanadium and titanium can be used for producing V2O5 with the purity more than or equal to 98.5 percent through a simplified wet method vanadium extraction process; and vanadium slag with the TiO2 content more than or equal to 48 percent can be used as sulfuric acid method titanium white or other industrial raw materials. The method can greatly improve the capacity of the tunnel kiln and the service life of a charging vessel, has high comprehensive utilization degree, reliable technology, investment conservation and low production cost, energy conservation and emission reduction, and little pollution, and creates conditions for industrialization.

Description

Technical field: [0001] The invention relates to the technical field of metallurgy, in particular to a new industrialized method for comprehensive utilization of vanadium-titanium-iron concentrate. Background technique: [0002] Blast furnace has high production efficiency and mature technology. It is the mainstream technology of domestic and foreign ironmaking production. It is also the only industrial production method for large-scale comprehensive utilization of vanadium-titanium iron concentrate. Concentrate is a great pioneering work in our country. The disadvantage of the blast furnace method is that it requires a large investment, requires a lot of coke, and causes serious pollution. [0003] With the depletion of high-quality coking coal resources in the world, the direct reduction electric furnace steelmaking technology has been used in Shenzhen since the 1980s due to its major advantages such as no coke ironmaking, short process, low energy consumption, low invest...

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Problems solved by technology

At the same time, the shortcomings of the tunnel kiln process used in the production of sponge iron from high-purity iron concentrate are also very prominent, that is, the low production capacity of a single kiln, the short service life of the refractory material container for charging, and t

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