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Method for separating and extracting iron, vanadium and titanium from vanadium-titanium magnetite

A technology for vanadium titanomagnetite and molten iron, which is applied in the field of separation and extraction of iron, vanadium and titanium, can solve the problems of long production process, high consumption of sodiumizing agent, large consumption of acid solution, etc., and achieves fast reaction speed and comprehensive recovery. High utilization effect

Active Publication Date: 2006-08-09
PANZHIHUA IRON AND STEEL
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  • Claims
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Problems solved by technology

The shortcoming of the first kind of method is that production flow is long, the consumption of sodiumizing agent is high, and the recovery rate of iron, vanadium and titanium is low (wherein the recovery rate of iron is about 85%, the rate of recovery of vanadium is about 60%, and the rate of recovery of titanium is about 75%); The disadvantages of the two methods are that the effect of extracting vanadium and titanium is unstable, the flow direction of vanadium and titanium is difficult to control and the consumption of acid solution is large, and the recovery rate of vanadium and titanium is low (wherein the recovery rate of vanadium is about 68%, and the recovery rate of titanium is 80% left and right); although the third method has the advantages of short technological process and low consumption of sodiumizing agent, it has the disadvantages of long reduction time and low production efficiency
[0004] The application number is 200510020117.7, and the title of the invention is "a method for separating and extracting metal elements from vanadium-titanium magnetite". It adopts the process flow of direct reduction→electric furnace melting→melting slag to extract vanadium and titanium. The direct reduction process only The recovery of iron, vanadium and titanium is carried out in slag, which has the disadvantages of high technical difficulty and low quality of vanadium and titanium products.

Method used

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Vanadium titanium magnetite powder (main components are: TFe content is 55.90%, FeO content is 23.28%, TiO 2 The content is 11.84%, V 2 o 5 content of 0.73%), coal powder (the main components are: ash content of 11.25%, volatile matter content of 8.62%, carbon content of 80.19%, the amount of coal powder is 22% of mineral powder), bentonite (amount of mineral powder 3%) to form a 30mm pellet after mixing. Dry at 200°C until the moisture content of the pellets is 1%. Put it into a reduction furnace at 1400°C for 50 minutes and keep the PCO / PCO in the furnace 2 1.0, the metallization rate of iron reaches 94%, and the reduction degree of vanadium reaches 92%. The metallized pellets are put into an electric furnace for melting, and the melting temperature is 1600°C to obtain vanadium-containing molten iron and titanium-containing steel slag. The main components of vanadium-containing molten iron are: C content 0.02%, V content 0.67%, Ti content 0.05%, the main componen...

Embodiment 2

[0023] Vanadium titanium magnetite powder (main components are: TFe content is 54.40%, FeO content is 33.19%, TiO 2 The content is 15.92%, V 2 o 5 content of 0.55%), coal powder (the main components are: ash content of 15.72%, volatile matter of 12.44%, fixed carbon content of 71.84%, the amount of coal powder is 25% of mineral powder), carboxymethyl cellulose (amount of 0.3% of the mineral powder) to form a 3mm pellet after mixing. Dry at 350°C until the moisture content of the pellets is 0.5%. Put it into a reduction furnace at 1500°C for 5 minutes and keep the PCO / PCO in the furnace 2 0.3, the metallization rate of iron reaches 97%, and the reduction degree of vanadium reaches 94%. The metallized pellets are put into an electric furnace for melting, and the melting temperature is 1560°C to obtain vanadium-containing molten iron and titanium-containing steel slag. The main components of vanadium-containing molten iron are: C content of 0.018%, V content of 0.56%, and Ti...

Embodiment 3

[0025] Vanadium titanium magnetite powder (main components are: TFe content is 52.50%, FeO content is 30.72%, TiO 2 The content is 13.14%, V 2 o 5 content of 0.58%), electrode blocks (the main components are: fixed carbon content of 91.88%, the dosage is 15% of the mineral powder), carboxymethyl cellulose (the dosage is 0.3% of the mineral powder) and mixed to form a 15mm pellet . Dry at 280°C until the moisture content of the pellets is 0.7%. Put it into a reduction furnace at 1450°C for 30 minutes and keep the PCO / PCO in the furnace 2 2.0, the metallization rate of iron reaches 95%, and the reduction degree of vanadium reaches 92%. The metallized pellets are put into a submerged arc furnace for melting, and the melting temperature is 1700°C to obtain vanadium-containing molten iron and titanium-containing steel slag. The main components of vanadium-containing molten iron are: C content of 0.033%, V content of 0.48%, and Ti content of 0.035%. The main components of titan...

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Abstract

This invention provides a method for separating and extracting Fe, V and Ti from a VTi magnetite including the following steps: 1, making balls with magnetite powder, reducers and a binder or pressing them to blocks to be dried, 2, putting them into a reducing furnace to be heated to 1400-1500deg.C to process metallic pellets, in which, the ratio of partial pressures of CO2 and CO in the gas phase is not greater than 2.0, 3, puuting the pellets into the furnace to be melt under 1560-1700deg.C to separate irons and slags to get the slags with melten iron and Ti, 4, extracting V with pyrogenic process to get melton iron and V slags, 5, processing the V slags to get V205, 6, processing the steel slags with Ti with H2SO4 or chlorination method to get TiO2.

Description

technical field [0001] The invention relates to a method for separating and extracting iron, vanadium and titanium from vanadium-titanium magnetite. Background technique [0002] Vanadium-titanium magnetite is a compound paragenetic ore, which is mainly distributed in Panzhihua, Xichang, Hebei and Anhui in my country, among which Panxi has the largest reserves, about 10 billion tons. Vanadium-titanium magnetite contains various elements such as iron, vanadium and titanium, and has great comprehensive utilization value. [0003] There are three main methods for the direct reduction, separation and extraction of iron, vanadium and titanium from vanadium-titanium-magnetite: the first method is: oxidation roasting of sodium pellets → water extraction of vanadium → direct reduction in rotary kiln → electric furnace melting; The first is: direct reduction in rotary kiln → electric furnace melting → water extraction of vanadium and titanium; the third is: direct reduction of cold ...

Claims

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Application Information

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IPC IPC(8): C21B3/00C21B15/00C22B7/04C22B5/12C22B1/24C22B34/12C22B34/22
CPCY02P10/20
Inventor 薛逊周家琮汤天宇邓君廖代华何群朱胜友刘功国王晶李桂军何绍刚
Owner PANZHIHUA IRON AND STEEL
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