Vanadium-titanium iron ore utilization method

Abstract

The invention provides a vanadium-titanium iron ore utilization method. The vanadium-titanium iron ore utilization method comprises the following steps of conducting oxidizing roasting pretreatment on vanadium-titanium iron ore, so that a pretreatment product is obtained; mixing the pretreatment product with a carbonaceous reducing agent and a binding agent, so that a mixed material is obtained; conducting agglomeration and drying on the mixed material, so that carbon-containing pellets are obtained; conducting reductive carbonization on the carbon-containing pellets, so that a metalized material is obtained; and conducting physical separation on the metalized material, so that an iron-enriched material and a titanium-enriched material are obtained. According to the vanadium-titanium iron ore utilization method, oxidizing roasting pretreatment is conducted on the vanadium-titanium iron ore, the ore phase structure of the vanadium-titanium iron ore is changed, and the difficulty of reduction and carbonization of titanic oxide is lowered; and meanwhile, most of the element sulfur in the vanadium-titanium iron ore is removed, quality of vanadium-titanium iron ore preparation products is improved, and the application scope of the vanadium-titanium iron ore is widened. It is indicated through experimental results that the removal rate of sulfur is 79% or above; titanium in the titanium-enriched material exists in the form of titanium carbide, the mass content of the titanium reaches 24% or above, and the titanium can serve as a raw material for producing titanium tetrachloride through a chlorination process; and the mass content of total ferrum (TFe) in the iron-enriched material reaches 88% or above.

Description

technical field [0001] The invention relates to the technical field of metallurgy, in particular to a method for utilizing vanadium-ilmenite ore. Background technique [0002] Vanadium-titanium magnetite is a compound ore in which iron, vanadium, titanium and other valuable elements coexist. Among them, vanadium has many excellent physical and chemical properties, known as the metal "vitamin", and has a wide range of applications. Covering many fields such as aerospace, chemistry, batteries, pigments, glass, optics, and medicine. Titanium has stable chemical properties, high temperature resistance, low temperature resistance, strong acid resistance, strong alkali resistance, and high strength and low density physical and chemical properties. It can be alloyed with iron, aluminum, vanadium or molybdenum and other elements to produce high strength. Light alloys are widely used in aerospace, military, chemical, automobile, agricultural food, medicine, kitchen utensils, sportin...

AI Technical Summary

Problems solved by technology

More importantly, the blast furnace-converter process can only recover the iron and vanadium in the vanadium-titanium magnetite concentrate, and the titanium element enters the blast furnace slag. Due to the low grade of titanium (TiO in blast furnace slag 2 content of 22% to 25%), there is still no effective way to use it, resulting in a waste of valuable titanium resources

[0005] In addition, industrial applications include direct reduction-electric furnace melting process to process vanadium-titanium magnetite. For example, New Zealand Steel Company and South Africa Highveld Steel Vanadium Company all use rotary kiln direct reduction-electric furnace melting process to process vanadium-titanium magnetite Mine, this process can obtain vanadium-containing molten iron and titanium-containing molten slag, in which vanadium can be recovered by blowing oxygen into vanadium-containing molten iron to extract vanadium slag, while titanium enters the molten slag, and TiO in the slag 2 The content is 30% to 35%. Although the titanium content in blast furnace slag is higher than that in blast furnace slag, there is still a technical problem that it is difficult to utilize titanium-containing molten slag.

At the same time, this process also has the problems of high energy consumption and poor economy in the electric furnace smelting process. Due to the limitation of resources and energy, it is very difficult to popularize this process on a large scale

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