Method for preparing nitrided ferrovanadium by using vacuum furnace

Abstract

The invention discloses a method for preparing nitrided ferrovanadium by using a vacuum furnace. A material is pretreated to realize quick heating in the vacuum furnace and to finish the drying, the carbonization and the nitriding within 7-8 hours, so that the time is effectively saved, and the production cost is largely reduced while the production efficiency of the vacuum furnace is improved. The method is used for preparing a nitrided ferrovanadium alloy to achieve the advantages of simple operation, low cost, accurate process control, stable product production and no environmental pollution. The vanadium content of the prepared nitrided ferrovanadium alloy is more than 45%, the nitrogen content can be more than 9%, and the impurity content is low.

Description

technical field [0001] The invention relates to the technical field of chemical metallurgy, in particular to a method for preparing ferrovanadium nitride by utilizing a vacuum furnace. Background technique [0002] Ferrovanadium nitride is a new type of vanadium-nitrogen alloy additive. Its performance is better than that of ferrovanadium and vanadium nitride. It can be widely used in high-strength spiral steel bars, high-strength pipeline steel, high-strength section steel (H-beam, I-beam, groove steel, angle steel), thin slab continuous casting and rolling high-strength steel strip, non-quenched and tempered steel, high-speed tool steel and other products. Because the specific gravity of vanadium nitride can reach more than 5.0g / cm3, it has a higher absorption rate than vanadium nitride (about 3.5 specific gravity), and the recovery rate of vanadium nitride can reach more than 95%. The absorption rate is 3%~5% higher, the performance is more stable, and it has higher fun...

AI Technical Summary

Problems solved by technology

[0004] At present, the production method of ferrovanadium nitride alloy is mainly to pulverize ferrovanadium, feed high-pressure nitrogen into the high-pressure reactor, and heat it to 1400 ℃ ~ 1600 ℃ after self-propagating combustion reaction reduction to prepare ferrovanadium nitride. The process has strict requirements on the structure of the device, and the reaction safety under high temperature and high pressure is poor

In addition, there are still some domestic studies on the preparation of vanadium-nitrogen alloys using vanadium oxides, but these methods are difficult to achieve industrial production and take a long time. Generally, it takes more than 20 hours to complete the processes of heating, drying, carbonization, and nitriding.