Method for recovering vanadium, titanium and iron from vanadium titanium magnetite

A technology for vanadium-titanium-magnetite and vanadium-titanium-iron, which is applied in the field of recovering vanadium-titanium-iron, can solve the problems of technical difficulty, large processing capacity, and difficulty in industrialization, and achieves simplified processing technology, reduced environmental pollution, and low realization difficulty. Effect

Active Publication Date: 2010-01-06
SICHUAN LOMON MINING & METALLURGY
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Problems solved by technology

The problem reflected in the industrialization of this process is: first, the titanium in the vanadium-titanium magnetite enters the blast furnace slag (TiO 2 content of about 15% to 22%), and the titanium in it cannot be recycled; secondly, coke must be used in blast furnaces, but coking coal is currently in short supply all over the world, and corresponding coking equipment factories are needed; thirdly, vanadium-titanium magnetite It needs to be sintered to make blocks, and corresponding sintering plants are required; Fourth, a large amount of dust and harmful gases are released during coking, sintering and blast furnace smelting in this process, which seriously pollutes the environment
This process first uses a rotary kiln to pre-reduce vanadium-titanium magnetite, then smelts vanadium-containing molten iron in an electric furnace, and then blows vanadium slag. The semi-steel after vanadium blowing is then smelted into steel by a converter. The main problems of this process are: Titanium in titanomagnetite in electric furnace slag (TiO 2 content of about 30%), it is impossible to recycle titanium in electric furnace slag
[0005] 3. For a long time, my country has studied a variety of treatment processes for the recovery of iron, vanadium and titanium from vanadium-titanium magnetite, mainly including shaft furnace-electric furnace separation process, fluidization-electric furnace separation process, rotary kiln-electric furnace separation process and tunnel kiln -process technologies such as ore dressing and separation, but the main problems of these tr

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  • Method for recovering vanadium, titanium and iron from vanadium titanium magnetite

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Experimental program
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Example Embodiment

[0025] Example 1:

[0026] Vanadium-titanium magnetite composition: TFe56%, TiO 2 12.5%, V 2 O 5 0.64%. Particle size -100 mesh, 100%, with <1mm anthracite coal powder, fixed carbon 80.29%, volatile content 6.96%, ash content 11.62%, and sulfur content 0.54%. The ratio of raw materials is: iron ore: coal powder: syrup=100:24:7. After mixing, press the powder tablet machine into 35×30×25mm block without drying, and put the block material on the rotary hearth furnace pan with a thickness of 5-6cm through a distributor.

[0027] The rotary hearth furnace is heated with coal gas, and the maximum temperature is 1350℃. After 20 minutes, a metallized block with a metallization rate of >90% is obtained. The block is spirally discharged into the duct connected to the electric furnace at about 1200°C and enters the melting electric furnace. The block material is continuously fed into the electric furnace for melting, and the temperature of the electric furnace is controlled at 1500-1600°C....

Example Embodiment

[0028] Example 2:

[0029] Vanadium-titanium magnetite composition: Tfe57.5%, TiO 2 13.5%, V 2 O 5 0.59%. The particle size is below -100 mesh, using <1mm anthracite coal powder. The raw material ratio is: iron ore: coal powder: polyvinyl alcohol aqueous solution (concentration 3%) = 100:24:6. After mixing, it is pressed into a Ф25mm ball shape with a powder tableting machine, dried at 80°C for 1h, the water content of the pellet is less than 1%, and the dried ball is loaded into the rotary hearth furnace pan through a distributor with a thickness of 4 to 5 cm.

[0030] The rotary hearth furnace is heated with coal gas at a maximum temperature of 1350℃. After 15 minutes, a metallized block with a metallization rate of >90% is obtained. The block enters the electric furnace at about 1200°C. The temperature of the electric furnace is controlled at 1550-1650°C and melted quickly. Vanadium-containing molten iron and titanium slag with black titanium stone as the main titanium-containi...

Example Embodiment

[0031] Example 3:

[0032] Vanadium titanium magnetite composition: Tfe54.5%, TiO 2 11.8%, V 2 O 5 0.55%. The particle size is below -100 mesh, using <1mm anthracite coal powder, and the raw material ratio is: iron ore: coal powder: carboxymethyl cellulose aqueous solution (concentration 2%) = 100:24:7. After mixing, press the powder tablet machine into 35×25×25mm block shape, natural curing and drying in the air for 12h, the pellet water content is less than 1%, the drying ball is put into the rotary hearth furnace pan through the cloth machine. The thickness is 4~5cm.

[0033] The rotary hearth furnace is heated with coal gas at a maximum temperature of 1370℃. After 15 minutes, a metallized block with a metallization rate of >90% is obtained. The block enters the electric furnace at about 1200℃, and the temperature of the electric furnace is controlled at 1550~1600℃. The vanadium-containing molten iron and the titanium slag with black titanium stone as the main titanium-contain...

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Abstract

The invention discloses a method for recovering vanadium, titanium and iron from vanadium titanium magnetite, comprising the following steps: using mineral powder, coal dust and binder together for agglomeration, reducting the mineral powder in a rotary hearth furnace to obtain a metallized product, then placing the product in an electric furnace by hot charging for melting and separating and obtaining titanium slag containing more than 50% of vanadium-bearing molten iron and TiO2. Vanadium slag is obtained by blowing vanadium in the vanadium-bearing molten iron, semisteel is used to make steel in a converter and the titanium slag can be used as raw material for extracting titanium directly. The method of the invention has high reduction temperature for vanadium titanium magnetite, short time, environmentally friendly, simple process and high yield of vanadium, titanium and iron so as to reach the aim of the comprehensive recovery and application of vanadium, titanium and iron and have good economic benefit and social benefit.

Description

technical field [0001] The invention relates to a method for recovering vanadium-titanium iron from vanadium-titanium magnetite, in particular to a method for obtaining vanadium-containing molten iron and titanium slag by using coal-based direct reduction-electric furnace melting and separation. Background technique [0002] At present, the traditional industrialized treatment of vanadium-titanium magnetite at home and abroad has the following several processes: [0003] 1. Blast furnace-converter smelting process. Companies that use blast furnaces to smelt vanadium-titanium magnetite include Nizhny Tagil Iron and Steel Company, Qiusov Iron and Steel Works, Panzhihua Iron and Steel Company, and Chengde Iron and Steel Company. In this process, vanadium is reduced into molten iron through blast furnace, and then vanadium is oxidized by converter blowing to obtain vanadium slag. It is then smelted into steel in a converter. The problem reflected in the industrialization of t...

Claims

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Application Information

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IPC IPC(8): C21B13/08C22B1/14C21C5/30C22B34/22
CPCY02P10/20
Inventor 陈厚生秦廷许范先国李家权
Owner SICHUAN LOMON MINING & METALLURGY
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