Method for recovering vanadium in vanadium-titanium magnetite ore

A technology of vanadium titanomagnetite and calcium additives, applied in the field of iron and steel metallurgy, can solve problems such as loss, and achieve the effects of low cost of raw materials, recycling and clean utilization, and short process flow

Active Publication Date: 2012-10-03
HEBEI IRON AND STEEL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method still has the disadvantage that a part of the vanadium in the vanadium-titanium magnetite is lost to blast furnace slag, electric furnace slag and steel slag

Method used

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  • Method for recovering vanadium in vanadium-titanium magnetite ore
  • Method for recovering vanadium in vanadium-titanium magnetite ore

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Example 1: figure 1 As shown, the processing steps of the method for recovering vanadium in this vanadium-titanium magnetite are as follows.

[0028] (1) Ingredients: Vanadium titanomagnetite and vanadium titanomagnetite 10% CaCO 3 1. Starch with 1% weight of vanadium-titanium magnetite is pelletized in a disc granulator, and then dried in an oven at 100°C to obtain agglomerate material; wherein, vanadium-titanium magnetite contains V 2 o 5 1.2wt%, Cr 2 o 3 0.4wt%, CaO 2.4wt%, SiO 2 6.5wt%;

[0029] (2) Reaction: Put the agglomerate material into a rotary furnace and heat it to 1200°C for 1 hour. After the reaction, the low-valent vanadium (chromium) is oxidized to pentavalent (hexavalent) and reacts with calcium additives to form calcium vanadate (chromic acid calcium), to obtain roasted clinker;

[0030] (3) Leaching: put the roasted clinker obtained in step (2) in CO 3 2- The mass percentage is 15wt% NaHCO 3 The solution is leached, and 2 kg of CO is injec...

Embodiment 2

[0035] Embodiment 2: The process steps of the method for recovering vanadium in this vanadium-titanium magnetite are as follows.

[0036] (1) Ingredients: high-chromium vanadium-titanium magnetite, CaO with 5% weight of high-chromium vanadium-titanium magnetite, and bentonite with 5% weight of high-chromium vanadium-titanium magnetite are agglomerated in a disc granulator, Then dry it in an oven at 100°C to obtain the agglomeration material; among them, the high chromium vanadium titanomagnetite contains V 2 o 5 0.9wt%, Cr 2 o 3 3.5wt%, CaO 1.4wt%, SiO 2 1.5wt%;

[0037] (2) Reaction: Put the agglomerate material into a tunnel kiln and heat it to 1100°C for 2 hours. During the reaction, oxygen is introduced to obtain roasted clinker;

[0038] (3) Leaching: put the roasted clinker obtained in step (2) in CO 3 2- The mass percentage is 40wt% NaHCO 3 Leaching in the solution, passing 1 kg of CO under pressure during the leaching process 2 ; Then filter to obtain calci...

Embodiment 3

[0043] Embodiment 3: The process steps of the method for recovering vanadium in this vanadium-titanium magnetite are as follows.

[0044] (1) Ingredients: direct reduction slag of vanadium titanomagnetite and 8% CaSO by weight of direct reduction slag 4 1. A metallurgical agglomeration binder with a weight of 3% of the direct reduction slag is used for agglomeration in a disc granulator, and then dried in an oven at 200°C to obtain an agglomeration material; wherein, the direct reduction slag contains V 2 o 5 8.9%, Cr 2 o 3 3.5%, CaO2.4%, SiO 2 17%;

[0045] (2) Reaction: The agglomeration material is put into a shaft furnace and heated to 900°C for 10 hours. During the reaction, oxygen-enriched air is introduced to obtain roasted clinker;

[0046] (3) Leaching: put the roasted clinker obtained in step (2) in CO 3 2- The mass percentage is 20wt% Na 2 CO 3 solution, and 10 kg pressure of CO 2 Afterwards, filter to obtain the eluate containing calcium-iron slag and van...

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Abstract

The invention discloses a method for recovering vanadium in vanadium-titanium magnetite ore. The method comprises the process steps of: (1) mixing, pelletizing or briquetting, vanadium-titanium magnetite ore, a calcium additive and an adhesive, drying and oxidizing roasting to obtain roasting clinker; (2) performing carbonation leaching on the roasting clinker by utilizing leaching solution containing CO3<2->, and performing solid-liquid separation to obtain calcium-contained iron ore slag and chrome-vanadium-contained dissolving solution; and (3) adding a reagent with NH4+ into the dissolving solution for ammonia settlement, so as to obtain ammonia vanadate, or adding acid liquor into the dissolving solution, and directly acidifying to obtain V2O5. By adopting calcified roasting-carbonation leaching, the vanadium in the vanadium-titanium magnetite ore is recovered, obtained sintered pellets containing the calcium-contained iron ore slag can be directly applied to blast furnace smelting; and therefore, the problem of recovering the vanadium in the vanadium-titanium magnetite ore is effectively solved, and subsequent blast furnace smelting is not influenced. After the vanadium is recovered by using the method, chromium can be recovered from obtained crystallizing mother solution; and therefore, the vanadium-titanium magnetite ore is effectively and comprehensively utilized.

Description

technical field [0001] The invention belongs to the technical field of iron and steel metallurgy, in particular to a method for recovering vanadium from vanadium-titanium magnetite. Background technique [0002] The main components of the iron concentrate obtained after vanadium-titanium magnetite separation by magnetic separation are iron and titanium, and the grade of vanadium in the ore is very low, about 0.5% to 0.8%. At present, there are two main methods for extracting vanadium from iron concentrates, one is to extract vanadium directly from iron concentrates; the other is to extract vanadium from slag after ironmaking and steelmaking. The most research on vanadium extraction directly from iron concentrate is the extraction of vanadium by sodium oxidation, and the iron concentrate is subjected to Na 2 SO 4 Roasting and water extraction of vanadium, the recovery rate of vanadium can reach 80%. The outstanding disadvantage is that the pellets after leaching cannot be s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B3/06C22B1/02C22B34/22C22B34/32
CPCY02P10/20
Inventor 李兰杰陈东辉
Owner HEBEI IRON AND STEEL
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