Converter vanadium extraction process of low silicon low temperature vanadium-containing molten iron

Abstract

The invention discloses a converter vanadium extraction process of low silicon low temperature vanadium-containing molten iron, and the process comprises blowing of the low silicon low temperature vanadium-containing molten iron in a converter and addition of a coolant in the blowing process, the blowing end point temperature is controlled to be 1340 to 1370 DEG C; the coolant use amount is 5-24kg / t low silicon low temperature vanadium-containing molten iron; the blowing process comprises the following three stages: a first stage from the beginning of the oxygen blowing to the oxygen blowing amount reaching 9-12% of the total oxygen blowing amount, a second stage from the end of the first stage to the oxygen blowing amount reaching 85-90% of the total oxygen blowing amount, and a third stage from the end of the second stage to the end of the oxygen; in the first stage, the gun height of the blowing process is controlled to be 1.6-1.8m; in the second stage, the gun height of the blowing process is controlled to be 1.9-2.1m; and in the third stage, the gun height of the blowing process is controlled to be 1.6-1.8m. Through the converter vanadium extraction process, the obtained vanadium slag is high in grade, obtained semi steel is high in C content and the goal of ''removing vanadium and holding carbon'' can be better realized.

Description

technical field [0001] The invention belongs to the technical field of vanadium extraction in a converter, and relates to a method for extracting vanadium in a low-silicon and low-temperature vanadium-containing molten iron converter. Background technique [0002] Vanadium is a precious metal with a wide range of applications and high economic value. It is an extremely important industrial raw material and can be widely used in the fields of steel, chemical industry, aerospace, electronics, biology and agriculture. 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. Vanadium, iron and titanium are symbiotic. Generally, it is smelted into molten iron, and then ...

AI Technical Summary

Problems solved by technology

[0004] CN102251070A introduces a method using CO 2 Solve the technical problems such as difficult temperature control and low vanadium oxidation conversion rate caused by weak stirring ability in the smelting process of vanadium extraction converter, and realize the method of high-efficiency vanadium extraction in converter. 2 The input amount, CO 2 Participate in the temperature control and strong stirring of the molten pool reaction, control the temperature of the molten pool during the vanadium extraction reaction process at 1350-1400 ° C, strengthen the stirring of the molten pool, increase the partial pressure of CO in the furnace, inhibit the decarburization reaction, and promote the extraction of vanadium and carbon preservation. Improving the oxidation conversion rate of vanadium and the grade of vanadium slag

However, this research is carried out under laboratory conditions, which has certain guiding significance for industrial production, but the actual application effect needs to be further verified and improved.

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