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Method for smelting vanadium iron

A technology for ferrovanadium and vanadium oxides, applied in the field of smelting ferrovanadium, can solve the problems of low recovery rate of vanadium and the like

Inactive Publication Date: 2015-05-06
PANZHIHUA IRON AND STEEL +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a method for smelting ferrovanadium with a higher recovery rate of vanadium in order to overcome the defect that the recovery rate of vanadium is relatively low in the method for smelting iron vanadium

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] This example is used to illustrate the method provided by the present invention.

[0040] Vanadium pentoxide, unslaked lime (CaO content is 85% by weight, the same below), iron and aluminum are mixed to obtain charge, wherein, relative to the oxygen element per mole in the vanadium pentoxide, the consumption of aluminum is 0.804 moles, The weight ratio of quicklime and aluminum is 1: 1.85; Relative to 1 weight part of iron, the consumption of vanadium pentoxide is 4 parts by weight in terms of vanadium element; that is, the weight ratio of vanadium pentoxide, aluminum, quicklime and iron It is 36.4:21.708:11.73:5.1.

[0041] After loading 2.93 tons of the above charge into a tilting electric arc furnace with a nominal capacity of 20 tons, heat the above charge to 1850°C within 15 minutes after powering on, and maintain it within the temperature range of 1850-1950°C for 30 minutes, and then according to GB / According to the ferrous ammonium sulfate titration method spec...

Embodiment 2

[0044] This example is used to illustrate the method provided by the present invention.

[0045] Mix vanadium pentoxide, quicklime, iron and aluminum uniformly to obtain charge, wherein, relative to every mole of oxygen in vanadium pentoxide, the amount of aluminum is 0.824 moles, and the weight ratio of quicklime to aluminum is 1:2; Relative to 1 part by weight of iron, the amount of vanadium pentoxide used is 4 parts by weight in terms of vanadium element; that is, the weight ratio of vanadium pentoxide, aluminum, quicklime and iron is 36.4:22.248:11.124:5.1.

[0046] After loading 2.94 tons of the above charge into a tilting electric arc furnace with a nominal capacity of 20 tons, heat the above charge to 1820°C within 15 minutes of power on, and maintain it within the temperature range of 1820-1900°C for 32 minutes, and then according to GB / According to the method specified in the ferrous ammonium sulfate titration method specified in T 8704.5-2007, the total vanadium con...

Embodiment 3

[0049] This example is used to illustrate the method provided by the present invention.

[0050] Mix vanadium pentoxide, quicklime, iron and aluminum uniformly to obtain charge, wherein, relative to every mole of oxygen in vanadium pentoxide, the amount of aluminum is 0.838 moles, and the weight ratio of quicklime to aluminum is 1:1.7; Relative to 1 part by weight of iron, the amount of vanadium pentoxide used is 4 parts by weight in terms of vanadium element; that is, the weight ratio of vanadium pentoxide, aluminum, quicklime and iron is 36.4:22.626:13.31:5.1.

[0051] After loading 3.04 tons of the above-mentioned charge into a tilting electric arc furnace with a nominal capacity of 20 tons, heat the above-mentioned charge to 1900°C within 20 minutes after powering on, and maintain it in the temperature range of 1900-2000°C for 25 minutes, and then according to GB / According to the ferrous ammonium sulfate titration method specified in T 8704.5-2007, it is measured that the...

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PUM

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Abstract

The present invention provides a method for smelting vanadium iron, comprising the steps of: (1) contacting a raw material including quick lime, iron and a vanadium oxide and aluminum under the conditions of the first thermite reaction to obtain a first alloy liquid and a first slag; wherein the amount of aluminum used is 0.75-0.9 moles relative to per mole of oxygen in the vanadium oxide, and the total vanadium content is not higher than 0.2 wt% in the first slag resulted from the first thermite reaction conditions; (2) contacting the first alloy liquid and the slag including iron oxides and quick lime and without vanadium oxide under the conditions of the second thermite reaction to obtain a second alloy liquid and a second slag; wherein the aluminum element content in the second alloy liquid is not more than 1.5 wt% and the total vanadium content in the second slag is not more than 0.8 wt% resulted from the second thermite reaction conditions. By the method, the technical solution provided by the present invention effectively improves the recovery rate of vanadium.

Description

technical field [0001] The invention relates to a method for smelting metal, in particular to a method for smelting ferrovanadium. Background technique [0002] Ferro-vanadium is a ferroalloy composed of vanadium and iron. It is mainly used as an alloy additive in steelmaking. High-vanadium ferro-vanadium is also used as an additive for non-ferrous alloys. Commonly used ferrovanadium contains three types of vanadium: 40 mass%, 60 mass% and 80 mass%. [0003] The method for smelting ferrovanadium includes: using quicklime, vanadium oxide, iron and aluminum as raw materials in an electric arc furnace to obtain ferrovanadium through two stages of reduction and refining; wherein, in the reduction stage, under high quicklime slag, The vanadium oxide reacts with aluminum thermite to reduce the vanadium. When the reduction stage has progressed until the total vanadium content in the slag is not higher than 0.2% by weight, the reduced slag is released. Then, vanadium oxide and li...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C35/00C22C33/04C22C38/12C22B5/04
Inventor 周芳刘丰强王永钢戈文逊游本银杜勇向丽
Owner PANZHIHUA IRON AND STEEL
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