Method for manufacturing high-density vanadium-nitrogen alloy

A technology of vanadium-nitrogen alloy and production method, which is applied in the field of high-density production of vanadium-nitrogen alloy, can solve problems such as no mention of apparent density, and achieve the effects of stable product quality, improved absorption rate and high apparent density

Inactive Publication Date: 2008-12-10
云南昆钢冶金新材料股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In the above research, either the apparent density is not mentioned, or the powder sample can only be used as an additive for powder metallurgy

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0063]603kg of vanadium pentoxide (containing 55.2% of vanadium) and 182kg of activated carbon, and 60kg of PVP-containing 1% aqueous solution, add 6kg of nano-iron powder and carbonyl iron colloidal solution, stir evenly, briquetting, molding, in a nitrogen atmosphere Continuously feed into the external heating rotary kiln under nitrogen protection, pre-fire to 800°C under nitrogen protection, and collect the pre-fired block products cooled to room temperature under nitrogen protection at the discharge port. Then push it into an improved soft magnetic nitrogen atmosphere kiln and heat it to a temperature of 1260°C. In the dynamic continuous process, the material undergoes carbonization and nitriding reactions. The vanadium-nitrogen alloy product is obtained after a total residence time of 5 hours in the high temperature zone. The vanadium nitrogen alloy prepared by the present invention: V: 78.2%, N: 16.7%, C: 3.8%, silicon, phosphorus and aluminum are less than: 0.10%, and ...

Embodiment 2

[0065] 823kg of ammonium metavanadate with a vanadium content of 42.9% and 276kg of activated carbon, and 47kg of an aqueous solution containing 1% of PVP, add 7kg of ferric oxide, ferric oxide and ferroniobium alloy, stir evenly, briquetting, molding, Continuously feed into the external heating rotary kiln under nitrogen protection, pre-burn to 830°C under the protection of nitrogen, and collect the pre-fired block products cooled to room temperature under the protection of nitrogen at the discharge port. Then it is pushed into an improved soft magnetic nitrogen atmosphere kiln and heated to a temperature of 1370°C. In the dynamic continuous process, the material undergoes carbonization and nitriding reactions. The vanadium-nitrogen alloy product is obtained after a total residence time of 5 hours in the high temperature zone. The vanadium nitrogen alloy prepared by the present invention: V: 78.5%, N: 17.9%, C: 2.3%, silicon, phosphorus and aluminum are less than: 0.10%, and...

Embodiment 3

[0067] 367kg of vanadium pentoxide containing 55.6% of vanadium and 423kg of vanadium containing 42.9% ammonium metavanadate and the gac of 259kg, and 50kg containing PVP is 1% aqueous solution and 5kg containing camphor 3% acetone solution, add 8kg four Ferric oxide, ferric hydroxide colloid and niobium powder are mixed evenly and then pressed into blocks and formed. They are continuously added to the external heating rotary kiln under a nitrogen atmosphere, pre-fired to 900°C under the protection of nitrogen, and collected at the outlet and protected by nitrogen. The pre-fired block product cooled to room temperature. Then push it into an improved soft magnetic nitrogen atmosphere kiln and heat it to a temperature of 1430°C. In the dynamic continuous process, the material undergoes carbonization and nitriding reactions. The vanadium nitrogen alloy product is obtained after the total residence time in the high temperature zone is 3 hours. The vanadium nitrogen alloy prepare...

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Abstract

The invention provides a method for producing vanadium-nitrogen alloy. In the method, powdered vanadium oxide or ammonium metavanadate, carbon powder, bonding agents and density increasing agents are evenly mixed and are subjected to briquetting and forming; the mixture is continuously added in an external-heat type rotary kiln under the atmosphere of nitrogen gas and preheated up to the temperature of below 1,000 DEG C under the protection of the nitrogen gas, and at a discharge port, preheated massive products which are cooled down to the room temperature under the protection of nitrogen gas are collected; and the massive products are put in an improved soft magnetism nitrogen atmosphere kiln and heated up to the temperature of between 1,000 and 1,500 DEG C so as to make materials carry out the carbonization reaction and the nitriding reaction, and the vanadium-nitrogen alloy products are obtained after discharge. In the vanadium-nitrogen alloy obtained, the V content is between 78 and 83 percent, the N content is between16 and 21 percent, the C content is less than or equal to 6 percent max, the contents of silicon, phosphor and aluminum are less than 0.01 percent, and the apparent density is more than 4.4g/cm<3>. The apparent density can be adjusted according to the requirements of a customer, and the maximum apparent density is 5.0 g/cm<3>. The method is characterized in that under the condition of not changing prior production processes, the apparent density of the vanadium-nitrogen alloy is improved by adding the density increasing agents, and the adsorption rate of molten steel in the vanadium-nitrogen alloy is more than 98 percent.

Description

technical field [0001] The invention relates to a method for high-density production of vanadium-nitrogen alloy, which belongs to the field of new materials. Background technique [0002] In 1925, using pine charcoal, Friederich and Sittig (E.Friederich and L.Sittig, Z.Anorg.Allg.Chem., 1925, 144, 169) used V 2 o 3 As a raw material, vanadium nitride was prepared at 1200 °C. [0003] In 1975, vanadium pentoxide was reduced with ammonia, and Guidotti et al. (R.A.Guidotti, G.B.Atkinsonand D.G.Kesterke, Report of Investigation No.8079, US Bureau of Mines, Washington DC, 1975) also obtained vanadium nitride. [0004] In 1995, using methane at 1180°C, Rajat and S.T.Oyama (Journal of Solid State Chemistry, 1995, 120, 320-326) reduced vanadium pentoxide to synthesize vanadium carbide. [0005] In 2000, vanadium nitride was prepared by using vanadium pentoxide at a high temperature of 1200-1800° in an intermediate frequency induction furnace by carbon reduction method, Prabhat Ku...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C1/00C22C29/16
Inventor 刘先松刘知之
Owner 云南昆钢冶金新材料股份有限公司
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