Converter vanadium extraction coolant and application thereof

Abstract

The invention discloses a converter vanadium extraction coolant which comprises scrap steel and an iron ore and iron oxide scale compound in a mass ratio of 1:(1-5). The iron ore and iron oxide scalecompound is obtained by adding iron ore and iron oxide scale into an adhesive, pressing and drying, wherein the adhesive is quicklime powder and / or light calcined dolomite powder. The invention further discloses a converter vanadium extraction process which comprises the following steps: adding molten iron into a converter, carrying out blowing vanadium extraction, and adding the coolant in the earlier stage of vanadium extraction. The coolant provided by the invention is obtained by adding a compound formed by compounding quicklime powder and light-burned dolomite powder into iron oxide scaleand iron ore, and proportioning a proper amount of scrap steel. Compared with pure iron oxide scale and scrap steel serving as the coolant, splashing waste of the coolant can be reduced, the high oxidation rate of vanadium is achieved, and the purposes of vanadium removal and carbon protection are well achieved.

Description

technical field [0001] The technical field of ferrovanadium smelting of the present invention particularly relates to a coolant used for extracting vanadium in a converter, and a process for extracting vanadium in a converter using the coolant. Background technique [0002] Vanadium is a precious metal and an important industrial raw material. It is widely used in steel, chemical industry, aerospace, electronics industry, biology and agriculture and other fields. Vanadium is widely distributed in nature, accounting for about 0.02% of the mass of the earth's crust, but its distribution is extremely scattered, and it often coexists with other metal ores. Therefore, when mining and processing these ores, vanadium is recovered as a symbiotic product or by-product. Vanadium-titanium magnetite is the main mineral resource of vanadium. Generally, vanadium-titanium magnetite is smelted into molten iron, and then oxidized and blown to obtain vanadium slag. Vanadium slag is the main r...

AI Technical Summary

Problems solved by technology

[0008] It can be seen from the above existing technologies that the use of coolants in the process of vanadium extraction in converters is very common, but the technical improvement of coolants is relatively small at present, and the commonly used coolants are mainly iron ore and iron oxide scale.

Although the above-mentioned commonly used coolants are effective in use, their disadvantages are also very significant.

As a coolant, iron ore does not need to take up blowing time, which is beneficial to slag, but the amount of slag produced is large, and improper operation may easily cause splashing

The composition of iron oxide scale is stable, with few impurities, but its relative density is small, and it is easy to be blown away by the airflow after being added into the furnace

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