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A device and method for continuous production of ferrovanadium nitride alloy

A ferrovanadium nitride and nitriding technology, applied in the field of metallurgy, can solve the problems of energy loss in the preparation process, large area occupation, complex process flow, etc., to achieve full utilization, reduce production costs, and improve production efficiency.

Active Publication Date: 2020-12-01
HEBEI IRON AND STEEL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Most of the existing technologies for preparing ferrovanadium nitride are nitriding ferrovanadium or reducing and nitriding vanadium oxides, iron and carbon to obtain ferrovanadium nitride. The above reactions are generally carried out in vacuum furnaces or pusher kilns. The entire process of reduction, nitriding and cooling needs to be carried out step by step, the process is complicated, the equipment is large, the area is large, the energy loss in the preparation process is serious, and the nitrogen content of the obtained product is low, the economic benefit is poor, and it is difficult to be widely promoted.

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  • A device and method for continuous production of ferrovanadium nitride alloy

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Embodiment 1

[0050] This embodiment provides a device for continuous production of vanadium-iron alloy, such as figure 1 As shown, the device includes a furnace body, the furnace body includes a shell 1 and a furnace 2, the furnace body is provided with a heating reaction zone, and the heating reaction zone includes a preheating reduction zone 3 from top to bottom, and the heat radiation Zone 4 and nitriding reaction zone 5, the position of the preheating reduction zone 3 and the nitriding reaction zone 5 in the furnace body is provided with a heating coil 10 for heating the material; the bottom of the heating reaction zone is provided with a cooling zone, so The bottom of the cooling zone is provided with a discharge machine 9, the discharge machine is a rotary discharge machine with intermittent teeth distributed above, the top of the furnace body is provided with an air outlet 7, and the side wall is provided with a feeding port 6 and an air inlet 8 , the feeding port 6 is higher than t...

Embodiment 2

[0052] This embodiment provides a method for continuously producing vanadium nitride ferroalloy, which is carried out by using the device provided in embodiment 1.

[0053] The target composition of the ferrovanadium nitride alloy prepared by the invention is: 64.5-66.3wt% of vanadium; 13.1-14.2wt% of nitrogen; the balance is iron and other unavoidable impurities.

[0054] Prepare as follows:

[0055] (1) Put V 2 o 3 , graphite and iron powder were ground to -80 mesh respectively, and then mixed according to the mass ratio of 100:30:33. At the same time, an appropriate amount of corn flour and water were added for mixing. For 3.5cm block materials, dry at 100-105℃ for 15 hours before use;

[0056] (2) Add the massive material obtained in step (1) through the feeding port 6 and enter the preheating reduction zone 3 in the furnace body. The heating coil 10 in the preheating reduction zone 3 is energized and heated to 500° C. for the reduction reaction for 5 hours. The gas in...

Embodiment 3

[0062] This embodiment provides a method for continuously producing vanadium nitride ferroalloy, which is carried out by using the device provided in embodiment 1.

[0063] The target composition of the ferrovanadium nitride alloy prepared by the invention is: 64.5-66.3wt% of vanadium; 13.1-14.2wt% of nitrogen; the balance is iron and other unavoidable impurities.

[0064] Prepare as follows:

[0065] (1) Put V 2 o 5 , coke and iron powder are ground to -80 mesh respectively, and then the ingredients are mixed according to the mass ratio of 100:38:28. At the same time, some powdered grains and water are added for mixing. After the mixing is completed, the pressure is controlled at 7MPa and pressed to a thickness. For bulk materials less than 3.5cm, dry at 100-105°C for 20 hours before use;

[0066] (2) Add the bulk material obtained in step (1) through the feeding port 6, and enter the preheating reduction zone 3 in the furnace body. The heating coil 10 in the preheating re...

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Abstract

The invention relates to a device and method for continuously producing a ferrovanadium nitride alloy. According to the device, the interior of a furnace body is provided with a heating reaction zonecomprising a preheating reduction zone, a heat radiation zone and a nitriding reaction zone from top to bottom, the lower part of the nitriding reaction zone is provided with a cooling zone, the bottom of the cooling zone is provided with a discharger, the top of the furnace body is provided with an air outlet, the side wall of the furnace body is provided with a feeding port and an air inlet, thefeeding port is higher than the heating reaction zone, and the air inlet is connected to the cooling zone. During a production process, the stay time of materials in the preheating reduction zone, the nitriding reaction zone and the cooling zone are same, and the three processes are cycled in cycles. Through improvement of a device structure, the device disclosed by the invention has reduction, nitriding and cooling integrated functions, realizes continuous production of the ferrovanadium nitride alloy and improves the preparation efficiency of the alloy; and meanwhile, the device efficientlyutilizes residual heat in the production process to maximize the use of energy and reduce production costs, and has good economic benefits and application prospects.

Description

technical field [0001] The invention relates to the field of metallurgy technology, in particular to the chemical metallurgical production technology of vanadium-iron alloy, and in particular to a device and method for continuously producing vanadium-iron alloy. Background technique [0002] Nitrogen has an excellent strengthening effect on the precipitation of carbonitrides in microalloyed steel. Nitrogen addition in steel has the following effects: improving the heat resistance, creep capacity and durability of steel, significantly improving the toughness and plasticity of steel, changing Phase distribution of vanadium. Vanadium element can greatly increase the elasticity and strength of steel, improve the wear resistance and burst resistance of steel, and it is resistant to high temperature and extreme cold. The addition of vanadium nitride to steel can significantly improve the comprehensive mechanical properties of steel such as strength, toughness, ductility and therm...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C1/05C22C29/16C22C35/00
CPCC22C1/056C22C29/16C22C35/00
Inventor 张苏新李兰杰李九江董自慧吴春亮耿立唐张振全
Owner HEBEI IRON AND STEEL
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