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Method for smelting ferrovanadium

A technology of ferro-vanadium and ferro-vanadium alloy, applied in the direction of improving process efficiency, can solve the problem of low recovery rate of vanadium, and achieve the effect of high recovery rate of vanadium and low energy consumption

Inactive Publication Date: 2013-01-23
PANGANG GROUP VANADIUM TITANIUM & RESOURCES +3
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Visible, this patent also has the deficiency that vanadium recovery rate is not high

Method used

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  • Method for smelting ferrovanadium

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] According to 10wt% of lime, 15wt% of vanadium-rich slag composed of refining slag and tank slag, 25wt% of aluminum, and the balance is V 2 o 3 and V 2 o 5 (V 2 o 3 and V 2 o 5 The weight ratio is 2:1) for batching to form a mixture. After mixing the mixture evenly, take 10t and put it into a can, and then put it into an electric furnace with a nominal capacity of 10t, and add 1.5t of iron particles into the furnace at the same time. After the feeding is completed, the power is sent to quickly melt the charge. After the charge is melted, V is passed through aluminum in the furnace 2 o3 and V 2 o 5 Reduction, the reduction time is 30min, and the reduction furnace temperature is about 2100°C. When the TV content in the slag is 0.1wt%, 95wt% of poor slag is produced, and then the furnace body returns to its original position. After the furnace body returns to its position, add lime 15wt%, iron sheet 10wt%, and the balance is V 2 o 5 500kg of refining material f...

Embodiment 2

[0039] According to lime 35wt%, aluminum 15wt%, the balance is V 2 o 3 Batching is carried out to form a mixture. After mixing the mixture evenly, take 3.8t and put it into a can, and then put it into an electric furnace with a nominal capacity of 5t, and add 2.5t of iron particles into the furnace at the same time. After the feeding is completed, the power is sent to quickly melt the charge. After the charge is melted, V is passed through aluminum in the furnace 2 o 3 Reduction, the reduction time is 90min, and the reduction furnace temperature is about 1800°C. When the TV content in the slag is 0.1wt%, 80wt% of poor slag is produced, and then the furnace body returns to its original position. After the furnace body returns to its position, add lime 30wt% and V 2 o 5 50kg of refining materials mixed with 70wt% ingredients, power transmission and refining, the refining time is 3min, the refining furnace temperature is about 1600 ℃, when the aluminum content in the vanadi...

Embodiment 3

[0042] According to 25wt% of lime, 15wt% of vanadium-rich slag composed of refining slag and tank slag, 35wt% of aluminum, and the balance is V 2 o 5 Batching is carried out to form a mixture. After mixing the mixture evenly, take 3.5t and put it into a can, and then put it into an electric furnace with a nominal capacity of 2t, and add 0.5t of iron particles into the furnace at the same time. After the feeding is completed, the power is sent to quickly melt the charge. After the charge is melted, V is passed through aluminum in the furnace 2 o 5 Reduction, the reduction time is 60min, and the reduction furnace temperature is about 1900°C. When the TV content in the slag is 0.2wt%, 87wt% of poor slag is produced, and then the furnace body returns to its original position. After the furnace body returns to its position, add lime 30wt% and V 2 o 5 30kg of refining materials mixed with 70% ingredients, power transmission and refining, the refining time is 80min, the refinin...

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Abstract

The invention provides a method for smelting ferrovanadium, which comprises the following steps of: preparing a mixture from 10 to 35 weight percent of lime, 15 to 35 weight percent of aluminum and the balance of V2O3 and / or V2O5; adding the mixture into an electric furnace and adding a predetermined amount of iron according to the requirement simultaneously; electrifying to melt materials in theelectric furnace so as to reduce the V2O3 and / or the V2O5 by using the aluminum, and discharging 80 to 95 weight percent of slag when the content of all vanadium in the slag is less than 0.2 weight percent; adding refined materials consisting of 15 to 35 weight percent of lime, 0 to 30 weight percent of iron oxide and the balance of V2O5 into the electric furnace according to the proportion of 10to 80kg per ton of ferrovanadium, refining, and discharging alloy liquid and refined slag when the content of the aluminum and vanadium in the ferrovanadium alloy liquid meets the requirement of a ferrovanadium alloy product to be produced on the content of the aluminum and the vanadium; and casting to obtain the ferrovanadium alloy product. By the method, 97 to 99 percent of vanadium recovery rate can be achieved, and energy consumption can be reduced.

Description

technical field [0001] The invention relates to the technical field of ferroalloy smelting, in particular to a method for producing vanadium-iron alloy through the two-stage continuous process of reduction and refining by adopting an electric thermite reduction method. Background technique [0002] Ferrovanadium is a very important alloying additive that can improve the strength, toughness, ductility and heat resistance of steel. The main representative products of ferrovanadium are FeV50 and FeV80. [0003] At present, the methods for producing ferrovanadium mainly include carbothermal reduction, silicothermal reduction and aluminothermic reduction. The carbothermal reduction method is easy to form carbides and the carbon content in the ferrovanadium produced is too high, so that its products cannot be used for most vanadium-containing alloy steels. Although the silicon thermal reduction method is low in cost, it is difficult to produce high-grade ferrovanadium, and its s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B4/06C22B5/04
CPCY02P10/20
Inventor 戈文荪刘丰强孙朝晖陈永蒋龙奎王永刚何为邓孝伯
Owner PANGANG GROUP VANADIUM TITANIUM & RESOURCES
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