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Ferroniobium alloy production method

A technology of ferroniobium alloy and production method, which is applied in the field of ferroniobium alloy production, can solve the problems of insufficient alloy quality and long cycle time, and achieve the effects of short production cycle, simple process and low energy consumption

Pending Publication Date: 2021-03-02
CNMC NINGXIA ORIENT GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Niobium concentrate electrothermal production adopts submerged arc furnace, which has a long cycle and continuous operation, and the quality of the alloy does not meet the national 60A standard

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Weigh 1000 kg, 500 kg, 400 kg, 50 kg, 60 kg, and 20 kg of raw material metallurgical grade niobium oxide, aluminum powder, iron oxide powder, lime, fluorite powder, and saltpeter respectively, ball mill, sieve and dry the lime for 200 degree, 300min, dry the aluminum powder, fluorite powder, and saltpeter at 200℃ and 250min respectively, put the above materials into the reactor, and ignite to form alloy liquid and slag liquid layer. The thickness of the slag liquid layer is about 50cm, and the thickness of the alloy liquid within 2 minutes, move the reaction furnace to the bottom of the electrode, turn on the electricity to heat the bottom electrode, spray aluminum powder, and continue to reduce the niobium oxide in the slag liquid layer. After 5 minutes of reaction, stop the power supply, cool the slag, and The alloy liquid is cooled everywhere, and the alloy liquid and slag layer are sampled.

[0040] Sampling and analysis of the ferroniobium alloy composition in this...

Embodiment 2

[0042] Weigh 1000 kg, 520 kg, 420 kg, 55 kg, 63 kg, and 22 kg of raw material metallurgical grade niobium oxide, aluminum powder, iron oxide powder, lime, fluorite powder, and saltpeter respectively, ball mill, sieve and dry the lime for 200 degree, 350min, dry the aluminum powder, fluorite powder, and saltpeter at 200 degrees for 300min respectively, put the above materials into the reactor, ignite, and form alloy liquid and slag liquid layer, the thickness of the slag liquid layer is about 50cm, the thickness of the alloy liquid within 2 minutes, move the reaction furnace to the bottom of the electrode, heat the bottom electrode, spray aluminum powder, and continue to reduce the niobium oxide in the slag liquid layer. After 5 minutes of reaction, stop the power supply, cool the slag, and The alloy liquid is cooled everywhere, and the alloy liquid and slag layer are sampled.

[0043] Sampling and analysis of the ferroniobium alloy composition in this example shows that the co...

Embodiment 3

[0045]Weigh 1000 kg, 550 kg, 410 kg, 53 kg, 65 kg, and 25 kg of raw material metallurgical grade niobium oxide, aluminum powder, iron oxide powder, lime, fluorite powder, and saltpeter respectively, ball mill, sieve and dry the lime for 200 degree, 320min, dry the aluminum powder, fluorite powder, and saltpeter at 200 degrees for 320min respectively, put the above materials into the reactor, ignite, and form alloy liquid and slag liquid layer, the thickness of the slag liquid layer is about 50cm, the thickness of the alloy liquid within 2 minutes, move the reaction furnace to the bottom of the electrode, turn on the electricity to heat the bottom electrode, spray aluminum powder, and continue to reduce the niobium oxide in the slag liquid layer. After 5 minutes of reaction, stop the power supply, cool the slag, and The alloy liquid is cooled everywhere, and the alloy liquid and slag layer are sampled.

[0046] Sampling and analysis of the ferroniobium alloy composition in this...

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Abstract

The invention provides a ferroniobium alloy production method. The ferroniobium alloy production method comprises the steps of ferroniobium production through a thermite process and ferroniobium refining, wherein in the step of ferroniobium production through the thermite process, metallurgical grade niobium oxide, aluminum powder, iron oxide powder, lime, fluorite powder and saltpeter are mixed in proportion; the raw materials are put into a reactor and ignited to react to obtain ferroniobium alloy liquid, and the upper layer of the alloy liquid is a slag liquid layer; and in the refining step, an electrode is put into the slag liquid layer, the slag liquid layer is heated through an electric arc to keep flowing, aluminum powder is blown into slag liquid to promote the aluminum powder toreduce niobium elements in the slag liquid, and the niobium elements enter the alloy liquid. The thermite process and electric arc heating are used for spraying aluminum, energy consumption is low, the process is simple, the production period is short, and no pollution is caused to the environment.

Description

technical field [0001] The invention relates to the technical field of alloy production, in particular to a production method of ferroniobium alloy. Background technique [0002] Ferroniobium is mainly used for smelting high-temperature (heat-resistant) alloys, stainless steel and high-strength low-alloy steel. It can refine the structure of steel, improve the strength, toughness and creep performance of steel, and improve the corrosion resistance of steel. It can play a role in refining the structure, so that the steel has good formability and welding performance. Niobium acts as solid solution strengthening and carbide precipitation strengthening in superalloys, improving the yield strength and surface stability of superalloys. The weight of niobium, one of the lightest of the refractory metals, is one of the factors behind the high use of superalloys. [0003] At present, the production method of ferro-niobium alloy in China is niobium oxide aluminothermic production, ...

Claims

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Application Information

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IPC IPC(8): C22C1/02C22C27/02C22C35/00C22C1/06
CPCC22C1/02C22C27/02C22C35/00C22C1/06Y02P10/20
Inventor 彭俊倪航星何志敏曹炜王占忠王冲闫彬史德生张志强
Owner CNMC NINGXIA ORIENT GRP
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