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Recycling method of vanadium-nitrogen alloy waste materials

A vanadium-nitrogen alloy and waste technology is applied in the field of recycling and utilization of vanadium-nitrogen alloy waste, which can solve the problems that the purity can not meet the production requirements, and can not produce waste and waste, so as to achieve green environmental protection in the recycling process, improve the utilization rate, and reduce production. cost effect

Inactive Publication Date: 2014-11-19
NANTONG HANRUI IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Vanadium-nitrogen alloy is a blank made of vanadium pentoxide, carbon powder, activator and other raw materials. Under the protection of normal pressure and nitrogen atmosphere, it is sintered at a high temperature of 1500-1800°C to form a vanadium-nitrogen alloy. After sintering A large amount of waste will be generated during the process, and its purity cannot meet the production requirements, and it cannot be treated as waste. To meet the requirements of compound scientific development, the waste needs to be recycled.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] The recycling method of vanadium-nitrogen alloy waste: collect vanadium-nitrogen alloy waste, and roast it in a gas furnace with an evaporation pot for 4 hours; the roasting temperature is 900°C; slowly add a sulfuric acid solution with a concentration of 2% to the vanadium-nitrogen alloy waste , dissolve vanadium, stir once every 5 minutes, until the final concentration of the solution is 220g / L, stop adding sulfuric acid solution; take out the clear liquid, put it into the medicine tank, add industrial sodium hydroxide solution to adjust the pH value to 6.2; then use liquid The residual liquid ammonia in the ammonia bottle is slowly filled with ammonia, the volume ratio of the clear liquid and liquid ammonia is 5:1, pressurized and stirred for 10 hours, the pressure is 2 kg, a white precipitate is obtained, and the white powder is obtained after being filtered by a dryer. It is mixed with the raw material ammonium metavanadate; the waste liquid is recycled several time...

Embodiment 2

[0029] The recycling method of vanadium-nitrogen alloy waste: collect vanadium-nitrogen alloy waste, and roast it in a gas furnace with an evaporator for 4 hours; the roasting temperature is 1000°C; slowly add sulfuric acid solution with a concentration of 2% to the vanadium-nitrogen alloy waste , dissolve the vanadium, stir once every 7 minutes, until the final concentration of the solution is 250g / L, stop adding the sulfuric acid solution; take out the clear liquid, put it into the medicine tank, add industrial sodium hydroxide solution to adjust the pH value to 6.5; then use liquid The raffinate ammonia in the ammonia bottle, the volume ratio of slowly filling ammonia clear liquid and liquefied ammonia is 5.2:1, pressurized and stirred for 10.5 hours, the pressure is 2.2 kilograms, obtains white precipitate, drier filters and obtains white powder, white powder and The raw material ammonium metavanadate is mixed and used; the waste liquid is recycled several times and sent to...

Embodiment 3

[0031] The recycling method of vanadium-nitrogen alloy waste: collect vanadium-nitrogen alloy waste, and roast it in a gas furnace with an evaporation pot for 4 hours; the roasting temperature is 800°C; slowly add a sulfuric acid solution with a concentration of 2% to the vanadium-nitrogen alloy waste , dissolve vanadium, stir once every 7min, until the final concentration of the solution is 230g / L, stop adding sulfuric acid solution; take out the clear liquid, put it into the medicine tank, add industrial sodium hydroxide solution to adjust the pH value to 6.8; then use liquid The residual liquid ammonia in the ammonia bottle was slowly filled with ammonia, the volume ratio of clear liquid and liquid ammonia was 5.8:1, pressurized and stirred for 11 hours, the pressure was 2.8 kg, and a white precipitate was obtained, which was filtered by a dryer to obtain a white powder, white powder It is mixed with the raw material ammonium metavanadate; the waste liquid is recycled se...

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PUM

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Abstract

The invention discloses a recycling method of vanadium-nitrogen alloy waste materials. The method comprises the following steps: collecting the vanadium-nitrogen alloy waste materials, and then roasting for 3.5-4.5 hours; slowly adding a sulphuric acid solution with the concentration of 2% into the vanadium-nitrogen alloy waste materials, so as to dissolve vanadium; taking out dissolved clear liquid, pouring the clear liquid into a drug tank, and adding an industrial sodium hydroxide solution to adjust the PH value to 6.2-6.8; then, filling ammonia, and stirring for 10-11 hours under pressurization, so as to obtain white sediments; filtering the white sediments by a spin-drying machine to obtain white powder, and mixing the white powder with a raw material, namely ammonium metavanadate for use; using the waste liquid for several times in a circulating manner, feeding the waste liquid into an evaporation pot at the upper part of a gas furnace for evaporation, and recycling and treating evaporated solid waste; recycling synthesis tail gas in the evaporation pot, and supplying the tail gas to the gas furnace in a centralized manner. The recycling method can increase the utilization ratio of vanadium-nitrogen alloy, is economic and environment-friendly, and can reduce the production cost.

Description

technical field [0001] The invention belongs to the technical field of waste recycling, and in particular relates to a method for recycling vanadium-nitrogen alloy waste in the production process of vanadium-nitrogen alloys. Background technique [0002] Vanadium-nitrogen alloy is a new type of alloy additive that can replace ferro-vanadium for the production of micro-alloyed steel. The addition of nitrogen-vanadium alloy to steel can improve the comprehensive mechanical properties of steel such as strength, toughness, ductility and thermal fatigue resistance. And make the steel have good weldability. Nitrogen-vanadium alloys can be used in structural steel, tool steel, pipe steel, steel bars and cast iron. The application of vanadium-nitrogen alloys in high-strength low-alloy steels can effectively micro-alloy vanadium and nitrogen at the same time, promote the precipitation of carbon, vanadium and nitrogen compounds in steel, and more effectively play the role of precipit...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B7/00C22B34/22
Inventor 葛广凯
Owner NANTONG HANRUI IND
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