Method for producing ferrovanadium nitride by use of vanadium nitride powder

Abstract

The invention discloses a method for producing ferrovanadium nitride by use of vanadium nitride powder. The method comprises the following steps: performing batch-grouping on the vanadium nitride powder according to 1-2 tons per batch, and then mixing; testing to obtain the contents of vanadium and carbon in each batch of the vanadium nitride powder; determining the ratio of the vanadium nitride powder, ferrous powder and vanadium oxide in raw materials according to test results of the vanadium nitride powder and requirements on target products, and then compounding according to the ratio of the raw materials; after compounding, continually performing secondary mixing; grinding materials subjected to secondary uniform mixing into 150 meshes or below, then canning, and placing into a pushed slab kiln; and firing to obtain target ferrovanadium nitride. Starting from the properties of the vanadium nitride powder, the method fires the vanadium nitride powder into the new product ferrovanadium nitride through combination reaction between vanadium, nitrogen and ferrum, meanwhile, the problem that qualified ferrovanadium nitride cannot be produced by the vanadium nitride powder with high carbon content, the finally obtained ferrovanadium nitride product conforms to the GB / T30896-2014 ferrovanadium nitride national standard requirements, and the difficult problem of redundancy of the vanadium nitride powder is solved.

Description

technical field [0001] The invention belongs to the technical field of chemical industry, and in particular relates to a method for producing ferrovanadium nitride by utilizing vanadium nitride powder. Background technique [0002] Vanadium nitride powder is a small-sized vanadium nitride product produced in the production process of vanadium nitride. It has the properties of finished vanadium nitride itself, but has its own characteristics, mainly as follows: (1) The carbon content is relatively high. The finished vanadium nitride is 1-2% higher; (2) The impurity content is slightly higher due to the introduction of impurity components during the collection process; (3) The vanadium content of the product is slightly lower than that of the same batch of finished products; (4) The product has a small particle size and powdery components The proportion is high and it is not easy to use. In the current situation, the proportion of product powder is 3-15%, and the best indicat...

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Problems solved by technology

This method can well realize the formation of vanadium nitride powder into blocks, but because the vanadium content of the vanadium nitride powder itself is lower than that of the finished product, and the added high-vanadium iron also contains about 18% iron, it will further pull Low vanadium content in the product, so this method is suitable for vanadium nitride powders containing more than 78% vanadium

[0006] In addition, due to the high carbon content of vanadium nitride powder, the carbon content of VN16 powder can reach 4-6%, and the carbon content of VN12 powder can reach 10%. Therefore, vanadium nitride powder and iron powder It is also not feasible to directly synthesize ferrovanadium nitride by mixing ferrovanadium. The carbon content of its products can barely meet the requirements of ferrovanadium nitride grade B (with a carbon content of less than 3%), and it cannot meet the requirements of ferrovanadium nitride A grade at all. (less than 0.5% carbon) requirements