Method for preparing ferrovanadium alloy based on vanadium slag

The technology of vanadium ferroalloy and vanadium slag is applied in the field of metallurgy, which can solve the problems of difficult reduction of vanadium pentoxide, low reduction rate of vanadium pentoxide, and large loss of furnace body, so as to increase reaction efficiency, realize resource recovery and utilization, Energy saving effect

Inactive Publication Date: 2020-04-21
四川润诚智元科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method of operation requires strict control of the slag alkalinity around 1.5 to 3.0. If the alkalinity is too high, vanadium pentoxide is not easily reduced; if the alkalinity is too low, the reduction rate of vanadium pentoxide is low, and the molten iron is relatively thin Big loss
In particular, this method is used to prepare...

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] This embodiment provides a method for preparing vanadium-iron alloy based on vanadium slag: extracting vanadium slag from vanadium-containing iron water, the composition of vanadium slag includes: the vanadium slag includes components: 23.8% vanadium pentoxide, iron oxide 15.9%, calcium oxide 1%, silicon dioxide 25%, phosphorus<0.3%, magnesium oxide<7%, aluminum oxide<2%; using the vanadium slag as raw material, the method provided by the invention is used to prepare vanadium-iron alloy. details as follows:

[0020] The vanadium slag raw material, reduced carbon and slag-making auxiliary materials are evenly mixed and then put into a submerged arc furnace for smelting, and the smelting temperature is 1580°C to 1590°C. The proportioning relationship of each material added is: reduced carbon: 47 kg / ton of vanadium slag; slag-making auxiliary materials: 148 kg / ton of vanadium slag. The auxiliary material for slag making is silicon slag, which contains simple silicon and h...

Embodiment 2

[0023] This embodiment provides a method for preparing vanadium-iron alloy based on vanadium slag: vanadium slag is extracted from vanadium-containing iron water, the composition of vanadium slag includes: the vanadium slag includes components: 24.3% vanadium pentoxide, iron 18.1% of calcium oxide, 2% of calcium oxide, 25% of silicon dioxide, phosphorus<0.3%, magnesium oxide<7%, and aluminum oxide<2%; using the vanadium slag as raw material, the method provided by the invention is used to prepare vanadium-iron alloy. details as follows:

[0024] The vanadium slag raw material, reduced carbon and slagging auxiliary materials are evenly mixed and then put into a submerged arc furnace for smelting. The smelting temperature is 1610°C to 1620°C. The proportioning relationship of each material added is: reduced carbon: 55 kg / ton of vanadium slag; slagging auxiliary materials: 180 kg / ton of vanadium slag. The auxiliary material for slag making is silicon slag, which contains simple ...

Embodiment 3

[0027] This embodiment provides a method for preparing vanadium-iron alloy based on vanadium slag: extracting vanadium slag from vanadium-containing iron water, the composition of vanadium slag includes: the vanadium slag includes components: 26.4% vanadium pentoxide, iron oxide 18.9% of calcium oxide, 3% of calcium oxide, 25% of silicon dioxide, phosphorus<0.3%, magnesium oxide<7%, aluminum oxide<2%; the vanadium slag is used as raw material to prepare vanadium-iron alloy by the method provided by the invention. details as follows:

[0028] The vanadium slag raw material, reduced carbon and slagging auxiliary materials are evenly mixed and then put into a submerged arc furnace for smelting, and the smelting temperature is 1660°C to 1670°C. The proportioning relationship of each material added is: reduced carbon: 63 kg / ton of vanadium slag; auxiliary material for slag making: 210 kg / ton of vanadium slag. The auxiliary material for slagging is silicon slag, which contains simp...

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Abstract

The invention discloses a method for preparing ferrovanadium alloy based on vanadium slag. The method comprises the following steps: using vanadium slag, including 14-30% of vanadium pentoxide and iron oxide by mass, as a raw material, and adding reducing carbon and a slagging auxiliary material for smelting and reacting to finally obtain ferrovanadium alloy. The slagging auxiliary material comprises any one or a mixture of silicon slag, silica and industrial silicon. According to the method, the silicon slag and the reducing carbon are combined, the qualified ferrovanadium alloy is prepared from the vanadium slag, the silicon simple substance and the semi-coke in the silicon slag are combined, vanadium pentoxide and low-price intermediate oxide of vanadium can be effectively and fully reduced, and it is guaranteed that the vanadium has a high recovery rate; and silicon dioxide hydrate in the silicon slag and silicon dioxide obtained through later decomposition can effectively reduce the basicity of the slag, and ferrovanadium alloy is prepared under the condition of low basicity.

Description

technical field [0001] The invention relates to the technical field of metallurgy, in particular to a method for preparing vanadium-iron alloy based on vanadium slag. Background technique [0002] Ferrovanadium is a kind of iron alloy, which can be obtained by reducing vanadium pentoxide with carbon in an electric furnace, and can also be obtained by reducing vanadium pentoxide by electric furnace silicon thermal method. It is widely used as an element additive for smelting vanadium-containing alloy steel and alloy cast iron, and in recent years, it is also used to manufacture permanent magnets. The ferrovanadium produced in my country has varieties such as V401 and V402, which contain about 40% vanadium. [0003] For the commonly used electric silicothermal method, flake vanadium pentoxide, 75% ferrosilicon and a small amount of aluminum are used as reducing agents, and qualified products are obtained through two stages of reduction and refining in an alkaline electric arc...

Claims

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Application Information

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IPC IPC(8): C22B4/06C22C38/12C22C35/00
CPCC22B4/06C22C35/005C22C38/12
Inventor 羊泰宇庹开正
Owner 四川润诚智元科技有限公司
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