Utilization method of heat and materials in preparing vanadium nitrogen alloy

Abstract

The present invention relates to the field of iron and steel metallurgy, more particularly to a utilization method for the heat and the material in vanadium-nitrogen alloy preparation. The utilization method is characterized by comprising: 1, utilizing the tail gas of an industrial medium-frequency furnace for vanadium-nitrogen alloy production, recovering and utilizing the heat in the tail gas, introducing the discharged tail gas into a utilization furnace so as to be re-utilized in the furnace, and reducing vanadium pentoxide by using the discharged tail gas to obtain vanadium trioxide while drying the vanadium pentoxide green pellet by using the heat of the tail gas; and 2, pouring the vanadium trioxide pellet reduced by the tail gas into a vertical kiln provided with a medium frequency induction furnace on the middle end, introducing nitrogen gas, carrying out carbonization and nitridation treatment, cooling to a predetermined temperature, and discharging the material. According to the present invention, with the utilization method, the production cost of V2O3 is reduced, the heating time of the medium frequency furnace is reduced, the process is simplified, the production capacity of the vanadium-nitrogen alloy single furnace is improved so as to reduce the production cost of the vanadium-nitrogen alloy.

Description

technical field [0001] The invention relates to the field of iron and steel metallurgy, in particular to a method for utilizing heat and materials in preparing vanadium-nitrogen alloys. Background technique [0002] The main application field of vanadium-nitrogen alloy is steel-making additive, which can significantly improve the strength and toughness of steel after being added. At present, the carbothermal reduction nitriding method is generally used to prepare vanadium nitrogen alloys, and the raw materials used are mainly vanadium oxides, including V 2 o 3 and V 2 o 5 . Same as V 2 o 5 compared to V 2 o 3 As a raw material has certain advantages, V 2 o 3 The melting point is high, no need to add a low-temperature preheating section during reduction, and the process is simple. In addition, V 2 o 3 The vanadium content per unit mass is high, the production capacity of a single furnace is large, and the efficiency is high. But V 2 o 3 The preparation cost is...

AI Technical Summary

Problems solved by technology

The tail gas produced in the production process of vanadium nitrogen alloy contains a certain amount of CO, and the tail gas also has a relatively high temperature. At present, this part of energy and resources has not been fully utilized, and the generated tail gas is directly emptied after combustion treatment. , resulting in a certain waste of resources

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