Preparation method of medium ferrovanadium

A technology of ferrovanadium and ferric iron salt, which is applied in the field of preparation of ferrovanadium, which can solve the problems of large amount of slag and complex production process control, and achieve the effects of less slag, easy washing and filtering, and low price

Active Publication Date: 2012-05-30
PANGANG GROUP VANADIUM TITANIUM & RESOURCES +1
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  • Abstract
  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

This method saves the production link of vanadium oxide, avoids the problem of acidic ammonium salt wastewater caused by the production of vanadium oxide, and has good fluidity of slag, but this method has a large amount of slag, and additional iron powder needs to be added. complex control

Method used

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preparation example Construction

[0012] The invention provides a method for preparing ferrovanadium, which comprises contacting the vanadium extracting leach solution with a water-soluble ferric salt, and controlling the pH value of the reaction system by adding calcium hydroxide and / or calcium oxide during the contacting process to maintain at In the range of 1.8-2.8, the contacted product is separated into solid and liquid to obtain a solid containing ferric vanadate and calcium vanadate. After the obtained solid is calcined and dehydrated, it is mixed evenly with aluminum powder, calcium oxide, and magnesium oxide. The homogeneous mixture is smelted in an induction furnace to obtain medium ferrovanadium.

[0013] In the present invention, the vanadium extraction leaching solution may be various vanadium extraction leaching solutions prepared by methods known in the art. For example, it can be the sodium vanadium extraction leaching solution prepared by the method of sodium roasting-water leaching of vanadi...

Embodiment 1

[0036]This embodiment is used to illustrate the preparation method of medium ferrovanadium.

[0037] Heat 1L of the vanadium-extracting leaching solution with a vanadium concentration of 25g / L to 100°C, then add ferric nitrate into the solution according to the molar ratio of Fe:V=1.1, stir well, and react for 60 minutes. During the reaction, milk of lime is used to adjust the pH Value, so that the pH value is stable in the range of 2.0-2.1. After the reaction is completed, the resulting solution is filtered, and 800ml of water is used to quickly wash to obtain a solid containing iron vanadate and calcium vanadate. The obtained solid is dried and calcined at 500 ° C. Dehydrate for 2 hours to obtain 80g of a solid mixture of iron vanadate and calcium vanadate, then add 33.6g of aluminum powder, 5.6g of calcium oxide, and 3.2g of magnesium oxide, mix well, put it into an induction furnace for smelting, raise the temperature to 1800°C, and keep In a molten state, after reacting f...

Embodiment 2

[0039] This embodiment is used to illustrate the preparation method of medium ferrovanadium.

[0040] Heat 1L of the vanadium extraction leach solution with a vanadium concentration of 30g / L to 80°C, then add ferric chloride into the solution according to the molar ratio of Fe:V=1.2, stir well, and react for 80 minutes. Hydrogen oxidation is used during the reaction. Calcium adjusts the pH value so that the pH value is stable at 2.3-2.4. After the reaction is completed, filter the obtained solution, and use 900ml of water to quickly wash to obtain a solid containing iron vanadate and calcium vanadate. The obtained solid is dried and calcined at 560°C Dehydrate for 2.5 hours to obtain 95g of a solid mixture of iron vanadate and calcium vanadate, then add 39.9g of aluminum powder, 7.6g of calcium oxide, and 4.8g of magnesium oxide, mix well, put it into an induction furnace for smelting, heat up to 1850°C, and keep Molten state, after reacting for 75 minutes, stop energizing, an...

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Abstract

The invention provides a preparation method of medium ferrovanadium. The method comprises the following steps of: contacting a vanadium-extracting lixivium with a water-soluble ferric salt; controlling the pH value of a reaction system to be in a range of 1.8-2.8 through adding calcium hydroxide and / or calcium oxide in the contact process; carrying out solid-liquid separation on a product obtained after contact so as to obtain a solid containing ferric vanadate and calcium vanadate; calcining and dewatering the obtained solid and then evenly mixing the solid with aluminum powder, calcium oxide and magnesium oxide; and smelting the evenly mixed mixture in an induction furnace to obtain medium ferrovanadium. The method provided by the invention is a medium ferrovanadium preparation method which is simple in production process and low in cost.

Description

technical field [0001] The invention relates to a preparation method of medium ferrovanadium. Background technique [0002] Ferrovanadium is mainly used as an alloying additive in steelmaking. After adding ferrovanadium to the steel, the hardness, strength, toughness and wear resistance of the steel can be significantly improved. Ferrovanadium is commonly used in the production of carbon steel, low alloy steel, strength steel, high alloy steel, tool steel and cast iron. [0003] At present, ferrovanadium smelting at home and abroad mainly includes vanadium trioxide, vanadium pentoxide, iron vanadate and calcium vanadate smelting methods. Among them, vanadium trioxide and vanadium pentoxide are used as raw materials to smelt ferrovanadium, and qualified medium ferrovanadium products are obtained by silicothermal method, aluminothermic method or carbothermal method. However, vanadium trioxide and vanadium pentoxide are usually extracted from the leach solution of vanadium e...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C27/02C22C1/00
Inventor 陈亮李千文李大标熊仁利
Owner PANGANG GROUP VANADIUM TITANIUM & RESOURCES
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