A kind of by-product high-purity vanadium-nitrogen alloy production process

A vanadium-nitrogen alloy and production process technology, which is applied in the field of vanadium-nitrogen alloy production technology, can solve the problems of unreachable nitrogen content, high oxygen content in products, difficult to carry out, etc., and achieves reduction of nitrogen consumption, high purity of by-products, and reduction of raw material costs. Effect

Active Publication Date: 2022-06-21
江西林力高新材料有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, vanadium pentoxide and vanadium trioxide are used as raw materials at home and abroad. The heat utilization rate is not high, and the pusher kiln process is often used. Due to the high sintering temperature, severe shrinkage, large grain size, and nitrogen is no longer easy to incorporate. , even if the carbon content is low, the reaction is difficult to carry out, resulting in a high oxygen content of the product, and the nitrogen content cannot reach more than 18%
In addition, vanadium-nitrogen alloys often produce waste gases such as water vapor and ammonia during the preparation process. In order to meet the emission standards, factories often use ammonium sulfate spray liquid for absorption. Ammonium sulfate is not only able to absorb waste gas, but also an excellent nitrogen fertilizer. , food caramel catalyst, has many uses in chemistry and biology, but few factories enrich the ammonium sulfate spray solution, improve the purity and sell it as a by-product

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] A production process of a high-purity vanadium-nitrogen alloy by product, the production process of the by-product high-purity vanadium-nitrogen alloy mainly comprises the following production steps:

[0025] (1) Dry the carbon black and ammonium metavanadate at 100°C for 55 minutes, place the carbon black in a ball mill, and after ball milling for 10 minutes at a ball-to-material ratio of 5:1, add ammonium metavanadate and deionized water at a mass ratio of 1:0.06 , the mass ratio of ammonium metavanadate and carbon black is 4:1, stirring at 200 rpm for 20 min, and pressing at a pressure of 17 MPa to obtain , and then dried at 100 °C for 3 h to obtain the base material;

[0026] (2) The base material is placed in a microwave oven with a frequency of 2.45 GHz and a power of 1 kW, the microwave oven is connected to a secondary flue gas absorption tower, evacuated to 15 Pa, and microwave calcined under a nitrogen atmosphere to make ammonium metavanadate and carbon black ...

Embodiment 2

[0029] A production process of a high-purity vanadium-nitrogen alloy by product, the production process of the by-product high-purity vanadium-nitrogen alloy mainly comprises the following production steps:

[0030] (1) Dry the carbon black and ammonium metavanadate at 105°C for 48 minutes, place the carbon black in a ball mill, and after ball milling for 13 minutes at a ball-to-material ratio of 5:1, add ammonium metavanadate and deionized water at a mass ratio of 1:0.08 , the mass ratio of ammonium metavanadate and carbon black is 4.5:1, stirring at 250 rpm for 18 min, and pressing at a pressure of 180 MPa to obtain , and then dried at 100°C for 3.5h to obtain the base material;

[0031] (2) The base material is placed in a microwave oven with a frequency of 2.45 GHz and a power of 2 kW, the microwave oven is connected to a secondary flue gas absorption tower, evacuated to 18 Pa, heated to 625 ° C at 9 ° C / min under nitrogen atmosphere, and kept for 45 min After cooling to...

Embodiment 3

[0034] A production process of a high-purity vanadium-nitrogen alloy by product, the production process of the by-product high-purity vanadium-nitrogen alloy mainly comprises the following production steps:

[0035] (1) Dry the carbon black and ammonium metavanadate at 110°C for 40 minutes, place the carbon black in a ball mill, and after ball milling for 15 minutes at a ball-to-material ratio of 5:1, add ammonium metavanadate and deionized water at a mass ratio of 1:0.1 , the mass ratio of ammonium metavanadate and carbon black is 5:1, stirring at 300 rpm for 15 min, and pressing at a pressure of 20 MPa to obtain The cylinder was then dried at 100 °C for 4 h to obtain the base material;

[0036] (2) The base material is placed in a microwave oven with a frequency of 2.45 GHz and a power of 3 kW, the microwave oven is connected to a secondary flue gas absorption tower, evacuated to 20 Pa, heated to 650 ° C at 10 ° C / min under nitrogen atmosphere, and kept for 40 min After co...

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PUM

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Abstract

The invention discloses a by-product high-purity vanadium-nitrogen alloy production process and relates to the technical field of alloy production. In the present invention, ammonium metavanadate and carbon black are firstly mixed and pre-reduced into a base material by microwave calcination, then calcium silicate whiskers are added, combined with an ultrasonic step, the nitrogen fixation ability of the base material is improved, and the nitrogen content of the vanadium-nitrogen alloy is increased, and then Calcination under the coupling of electric field, pressure and microwave multi-fields makes the vanadium nitrogen alloy grow orderly, inhibits the formation of grains, and improves the compactness of the vanadium nitrogen alloy; in addition, the waste gas generated during the production process is sprayed and absorbed by ammonium sulfate to meet the emission standard , and the ammonium sulfate spray solution is enriched by resin adsorption, and then evaporated and crystallized to effectively improve the purity of ammonium sulfate. The vanadium-nitrogen alloy prepared by the invention has higher nitrogen content, and the produced by-products have higher purity.

Description

technical field [0001] The invention relates to the technical field of alloy production, in particular to a production process of high-purity vanadium-nitrogen alloy by-product. Background technique [0002] Vanadium-nitrogen alloy is a new alloying additive that can replace ferrovanadium in the production of microalloyed steel. The new grade 3 and above vanadium-containing steel bars produced by using vanadium-nitrogen alloy (vanadium nitride) technology, because of their increased strength, not only enhances the safety and earthquake resistance of buildings, but also saves 10 ~15% steel. At the same time, vanadium-nitrogen alloy has more effective strengthening and grain-refining effect than steel, and saves the amount of vanadium added. Under the same strength condition, vanadium-nitrogen alloy can save 20-40% of steel compared with ferrovanadium. [0003] At present, vanadium pentoxide and vanadium trioxide are used as raw materials at home and abroad, and the heat uti...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C1/10C22C27/02C22C35/00C01C1/242
CPCC22C1/10C22C27/025C22C35/00C01C1/242
Inventor 余翰林杨陈波邓见超
Owner 江西林力高新材料有限公司
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