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
2 Cites 48 Cited by

AI-Extracted Technical Summary

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...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

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.

Application Domain

Technology Topic

Titanium slagSocial benefits +3

Image

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

Examples

  • Experimental program(3)

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. After heating, the molten iron containing vanadium and titanium slag are quickly melted. Titanium slag and vanadium-containing molten iron are periodically discharged into the molten iron ladle and slag pot. The main components of the vanadium-containing molten iron are: carbon [C] 3.8%, vanadium [V] 0.42%, silicon [Si] 0.38%, and titanium [Ti] ] 0.2%, the vanadium-containing molten iron is directly blown into the converter to obtain vanadium pentoxide (V 2 O 5 ) 14.5% vanadium slag. After melting in the electric furnace, TiO containing about 53% titanium dioxide is obtained 2 The titanium slag can be directly used as the raw material for the production of titanium dioxide by the sulfuric acid method.

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-containing phase, titanium slag and vanadium-containing molten iron are periodically discharged into the molten iron ladle and slag pot respectively. The main component of the vanadium-containing molten iron is: carbon [C] 3.7% , Vanadium [V] 0.48%, silicon [Si] 0.30%, titanium [Ti] 0.16%, vanadium-containing molten iron is blown to obtain vanadium pentoxide (V 2 O 5 ) 17.5% vanadium slag, electric furnace smelted to obtain about 58% titanium slag, the titanium slag is finely ground to below 20 microns, and the black titanium stone is phase separated by flotation to obtain titanium dioxide-containing TiO 2 The black titanite titanium-rich material with a content of 89% can be used as the raw material for the chloride method titanium white.

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-containing phase, the titanium slag and the vanadium-containing molten iron are periodically discharged into the molten iron ladle and the slag pot respectively. The main components of the vanadium-containing molten iron are: [C]4.0%, [V] 0.40%, [Si] 0.20%, [Ti] 0.16%, vanadium-containing molten iron is blown to obtain vanadium pentoxide (V 2 O 5 ) 17.0% vanadium slag, after the electric furnace is melted, the titanium slag containing about 52% is obtained. The titanium slag is melted in the electric furnace, and oxygen is blown to oxidize the titanium to the rutile phase, and then finely ground to less than 20 microns. The rutile phase is separated to obtain titanium dioxide TiO 2 The rutile titanium-rich material whose content can reach 85% can be used as the raw material of chlorinated titanium dioxide.
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

no PUM

Description & Claims & Application Information

We can also present the details of the Description, Claims and Application information to help users get a comprehensive understanding of the technical details of the patent, such as background art, summary of invention, brief description of drawings, description of embodiments, and other original content. On the other hand, users can also determine the specific scope of protection of the technology through the list of claims; as well as understand the changes in the life cycle of the technology with the presentation of the patent timeline. Login to view more.
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Similar technology patents

Demodulator device with function of frequency calibration based on adaptive equalization

ActiveCN104821791AReduce the difficulty of implementationImprove reliabilityModulation transference balanced arrangementsIntersymbol interferenceSelf adaptive
Owner:NO 54 INST OF CHINA ELECTRONICS SCI & TECH GRP

Classification and recommendation of technical efficacy words

  • Reduce the difficulty of implementation
  • Simple processing

Broadband terahertz harmonic mixer

ActiveCN105207625AReduce the difficulty of implementationHighly integratedMulti-frequency-changing modulation transferenceRadio frequencyBroadband
Owner:UNIV OF ELECTRONIC SCI & TECH OF CHINA

Heavy Duty Overrunning Clutch

Owner:SOUTHWEST UNIVERSITY
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products