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Method for smelting vanadium-aluminum alloy by electro-aluminothermic process

A vanadium-aluminum alloy and electric thermite technology, which is applied in the field of electric aluminotherm to smelt vanadium-aluminum alloys, can solve problems such as difficult control of reaction temperature, low product yield, and reduced yield, so as to avoid product slag inclusion, reaction The process is controllable and the effect of reducing vanadium loss

Active Publication Date: 2015-04-15
HEBEI IRON AND STEEL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0013] (3) Low vanadium yield: Because of splashing, alloy inclusions, slag carrying vanadium and reaction flue gas loss during the reaction, the vanadium yield of the above-mentioned vanadium-aluminum alloy production method is low, generally ≤85%
[0014] (4) Low product yield: Since the reaction temperature is not easy to control, high or low temperature during the reaction process will cause slag and vanadium-aluminum alloy to be mixed with each other, and it is difficult to separate, resulting in a decrease in yield

Method used

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  • Method for smelting vanadium-aluminum alloy by electro-aluminothermic process
  • Method for smelting vanadium-aluminum alloy by electro-aluminothermic process
  • Method for smelting vanadium-aluminum alloy by electro-aluminothermic process

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Embodiment 1

[0030] Example 1: image 3 As shown, the method for smelting vanadium-aluminum alloy by electric thermite method adopts the following process steps.

[0031] After mixing 0.4 tons of vanadium pentoxide, 1.6 tons of vanadium trioxide, 0.3 tons of slagging agent and 0.8 tons of aluminum chips, they are added to the reaction furnace in three stages. An electric arc is generated with the aluminum in the raw material to cause the thermite reaction. After smelting for 15 minutes, add 1.05 tons of the second-stage material. After continuing to smelt for 15 minutes, add 1 ton of the final material. After 10 minutes of smelting, spray aluminum powder with poor slag. The powder spraying process is in 0.7Mpa argon. Under the action, 20kg of aluminum powder is injected per ton of vanadium pentoxide (vanadium oxide is converted into vanadium pentoxide), and the smelting is continued for 10 minutes after powder spraying to complete the smelting. After the smelting was completed, the electr...

Embodiment 2

[0032] Embodiment 2: The method for smelting vanadium-aluminum alloy by electric thermite method adopts the following process steps.

[0033] After mixing 1 ton of vanadium pentoxide, 1 ton of vanadium tetroxide, 0.3 ton of slagging agent and 0.9 ton of aluminum filings, add them to the reaction furnace in three stages, and add the bottom to the reaction furnace in three stages. Put 1.1 tons of material into the reaction furnace, the electrode and the aluminum in the raw material generate an electric arc to cause thermite reaction, add 1.1 tons of secondary material after 3 minutes of smelting, add 1 ton of final material after smelting for 20 minutes, spray aluminum powder poor slag after 15 minutes of smelting, spray The powder process is under the action of 0.8Mpa argon gas, spraying 15kg of aluminum powder per ton of vanadium pentoxide (vanadium oxide is converted into vanadium pentoxide), and then smelting for 15 minutes to complete the smelting. After the smelting was co...

Embodiment 3

[0034] Embodiment 3: The method for smelting vanadium-aluminum alloy by electric thermite method adopts the following process steps.

[0035] After mixing 2 tons of vanadium pentoxide, 20 kg of dedusting ash, 0.3 tons of slagging agent and 1.23 tons of aluminum chips, add them to the reaction furnace in three stages, first add 1.2 tons of bottom material to the reaction furnace, and the electrodes and raw materials Chalco generates an electric arc to trigger the thermite reaction. After smelting for 25 minutes, add 1.2 tons of the second-stage material. After continuing to smelt for 25 minutes, add 1.15 tons of the final material. After 3 minutes of smelting, spray aluminum powder and poor slag. The powder spraying process is under the action of 0.6Mpa argon. , per ton of vanadium pentoxide (vanadium oxide is equivalent to vanadium pentoxide), 30kg of aluminum powder is sprayed into it, and the smelting is continued for 3 minutes after powder spraying to complete the smelting. ...

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Abstract

The invention discloses a method for smelting a vanadium-aluminum alloy by an electro-aluminothermic process. The method comprises the following steps of adding mixture into an electric arc furnace by stages after uniformly mixing vanadium oxide, an aluminum reducing agent and a slag forming constituent, and smelting by sequentially carrying out an aluminothermic reduction; and removing slag, finishing and crushing after completing the smelting, and thus obtaining the vanadium-aluminum alloy. According to the method disclosed by the invention, the electro-aluminothermic process is adopted for smelting at stages, the concentrated releasing of reaction heat can be effectively avoided, the splashing situation during a reaction process can be effectively relieved, the phenomenon that alloy exists in slag can be reduced to a large extent, the reaction process is controllable, and the method is particularly suitable for large-scale industrial production.

Description

technical field [0001] The invention relates to a production method of vanadium-aluminum alloy, in particular to a method for smelting vanadium-aluminum alloy by electric aluminotherm. Background technique [0002] At present, titanium alloys are widely used in the aerospace field, and vanadium-aluminum alloys, as an important alloy additive in the production of aerospace-grade titanium alloys, have good application prospects. In addition, vanadium-aluminum alloys are also raw materials for refining iron-free superalloys and metal vanadium. Therefore, it is of great significance to study a high-yield, high-efficiency, and low-cost technology for producing vanadium-aluminum alloys. [0003] At present, vanadium-aluminum alloys are produced by the aluminothermic method of vanadium oxide and metal aluminum, which can be divided into one-step method and two-step method according to the production process. The two-step method is only adopted by the German GFE and the American V...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C1/00C22C27/02C22B5/04C22B34/22
Inventor 陈东辉李东明李九江朱立杰白瑞国
Owner HEBEI IRON AND STEEL
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