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Method for producing medium ferrovanadium by ferrovanadate ferroelectric silicothermal method

An electro-silicothermal method and iron vanadate technology, which is applied in the field of ferrovanadium production to achieve the effects of optimizing the structure of vanadium products, promoting development and innovation, and achieving remarkable environmental protection effects.

Active Publication Date: 2016-05-25
HEBEI IRON AND STEEL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the technology of using ferric vanadate as raw material and ferrosilicon as reducing agent to smelt Chinese ferrovanadium by electrosilicothermal method has not been reported yet.

Method used

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  • Method for producing medium ferrovanadium by ferrovanadate ferroelectric silicothermal method

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Experimental program
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Effect test

Embodiment 1

[0036] Embodiment 1: The processing steps of the method for producing medium ferrovanadium by ferrovanadate ferroelectric silicothermal method are as follows.

[0037]The composition of ferric vanadate in the raw material is 33% iron, 29% vanadium, and 37% oxygen. Ferrosilicon (75% ferrosilicon) needs to be added during reduction, which is 0.49% of the mass of iron vanadate. According to calculation, the vanadium content of ferrovanadium is 39%, the production of FeV50 that meets the national standard needs to add vanadium oxide, the added vanadium pentoxide is 0.195 of iron vanadate, and the added pure aluminum for reduction of added vanadium pentoxide is 0.1 of iron vanadate, because Fe Excessive, no need to add additional scrap. Ferric vanadate, ferrosilicon, vanadium oxide, and calcium oxide are prepared according to the calculated proportions, and then they are divided into four phases and added to the electric silicon heating furnace for smelting. Refining, guarantee th...

Embodiment 2

[0038] Embodiment 2: The processing steps of the method for producing medium ferrovanadium by ferrovanadate ferroelectric silicothermal method are as follows.

[0039] The composition of ferric vanadate in the raw material is 23% iron, 37% vanadium, and 39% oxygen. Ferrosilicon needs to be added during reduction to be 0.52 of the mass of ferric vanadate. When producing FeV50 that meets the national standard, Fe, The V ratio contains 50.6% vanadium, which meets the requirements of the national standard FeV50. Ferric vanadate, ferrosilicon, and calcium oxide can be directly mixed according to the calculated ratio, and then added into the electric silicon heating furnace for smelting in four stages. After adding the furnace materials in the stage IV for smelting, add silicon-aluminum iron or pure aluminum for refining, and ensure the alkalinity in the furnace during the smelting process (CaO%:SiO 2 %) In 2.1, after obtaining the qualified molten vanadium iron, the fine slag is di...

Embodiment 3

[0040] Embodiment 3: The process steps of the method for producing medium ferrovanadium by ferrovanadate ferroelectric silicothermal method are as follows.

[0041] The composition of ferric vanadate in the raw material is 16% iron, 43.3% vanadium, and 39% oxygen. Ferrosilicon needs to be added during reduction, which is 0.52% of the mass of ferric vanadate. When producing medium ferrovanadium containing 50% vanadium, add If Fe is less than 50% of the ferrovanadium iron content, scrap steel needs to be added, and the added scrap steel is 0.15 of ferric vanadate. Because V is too much, no additional vanadium oxide is needed. After the ferric vanadate, ferrosilicon and calcium oxide are prepared according to the calculated ratio, they are divided into four phases and added to the electric silicon heating furnace for smelting. Guarantee the basicity in the furnace during the process (CaO%:SiO 2 %) at 2.5, after obtaining qualified molten vanadium iron, the fine slag is discharge...

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Abstract

The invention discloses a method for producing medium-vanadium iron from ferric vanadate through an electro-silicothermic process. The method comprises the steps of (1) calculating the ratio of materials into a furnace according to the ingredients of the ferric vanadate, mixing the ferric vanadate with silicon iron, calcium oxide and the like in the ratio, and adding vanadium oxide or waste steel according to the requirements in the mixing process to adjust the vanadium content or the iron content in the raw materials, (2) adding the mixed raw materials to an electro-silicothermic furnace by four phases, firstly adding cold slag to a ferro-vanadium electric furnace before feeding, adding the mixed raw material of phase I after electrifying, orderly adding the mixed raw material of phase II after lean slag is obtained through smelting, adding the mixed raw materials of the next phase after the lean slag is obtained through smelting at each phase, and adding ferro-silico aluminum or pure aluminum for refining after the furnace materials of phase IV are added for smelting, and then obtaining fine slag and liquid vanadium iron. The method is capable of producing the vanadium iron from the ferric vanadate instead of vanadium pentoxide, and therefore, the generation and after-treatment of ammonia-nitrogen wastewater in the production of vanadium pentoxide are avoided, the production flow of the vanadium iron raw material is simplified and the step cost is reduced; and besides, the method is quite remarkable in energy saving and environmental protection effects.

Description

technical field [0001] The invention relates to a method for producing ferrovanadium, in particular to a method for producing medium ferrovanadium by ferrovanadate ferroelectric silicon thermal method. Background technique [0002] Ferrovanadium is an important alloy additive for iron and steel products. It is usually produced by electrosilicothermal method, aluminothermic method and electroluminothermic method; the electrosilicon thermal method is used to heat vanadium in an electric arc furnace, and ferrosilicon is used as a reducing agent to reduce vanadium. Compounds to obtain ferrovanadium products. This method is widely used in the industry due to its good production continuity, high product stability, high vanadium yield, good product quality and low cost. The production of ferrovanadium by the conventional electrosilicothermal method is obtained by reducing vanadium oxide (including vanadium pentoxide, vanadium trioxide and their mixtures) with ferrosilicon (part of...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B4/06C22B5/04C22C33/00C22C38/12
Inventor 陈东辉李东明李九江卢永杰朱立杰孟旭光
Owner HEBEI IRON AND STEEL
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