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Method for comprehensive utilization of V-Ti-bearing iron ore concentrate by using tunnel kiln reduction-grinding - separation

A technology of vanadium-titanium iron concentrate and tunnel kiln, which is applied in the field of extracting iron from vanadium-titanium-iron concentrate, comprehensive utilization of vanadium-titanium iron concentrate, vanadium and titanium, and can solve the problem of long reduction time, increased energy consumption, Affect the strength of the pellets and other issues, to achieve the effect of convenient equipment maintenance, high production efficiency, and stable operation of the equipment

Inactive Publication Date: 2008-01-30
攀枝花锐龙冶化材料开发有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The reduction time is longer, resulting in increased energy consumption. In addition, the addition of sodium salt will affect the strength of the pellets

Method used

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  • Method for comprehensive utilization of V-Ti-bearing iron ore concentrate by using tunnel kiln reduction-grinding - separation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] 1. The chemical composition weight percentage of vanadium-titanium iron ore concentrate is: TFe 58.44~59.13%, TiO 2 10.47~12.83%, V 2 o 3 0.61~0.81%, Cr 2 o 3 0.078~0.084%, SiO 2 2.31~2.58%, Al 2 o 3 2.36~2.64%, CaO 1.24~1.40%, MgO 2.37~2.55%, MnO 0.18~0.23%, S 0.03~0.05% and P 0.0014~0.0018%, the rest is ash or other trace components, the total amount is 100%.

[0028] 2. Process conditions: 5000g of vanadium-titanium iron concentrate is crushed to -120+200 mesh, of which -160+200 mesh accounts for 75%, and 20% of the original ore weight is added with a particle size of -160 mesh, accounting for 85% of the coal powder and the original ore weight is added 2% solid calcium lignosulfonate binder and vanadium-titanium ferrite concentrate are lubricated and ground for 0.5h, and pellets with a diameter of 25-30mm are made into pellets with a spherical egg forming machine, dried at 250°C for 4h, and reduced in a tunnel kiln. Control at 1150-1200°C for 12 hours. Aft...

Embodiment 2

[0030] 1. The chemical composition weight percentage of vanadium-titanium iron concentrate is: TFe 57.01~58.82%, TiO 2 11.31~12.14%, V 2 o 3 0.61~0.65%, Cr 2 o 3 0.054~0.067%, SiO 2 2.12~2.45%, Al 2 o 3 2.02~2.49%, CaO 1.14~1.58%, MgO 2.67~2.89%, MnO 0.12~0.20%, S 0.02~0.04% and P 0.0013~0.0016%, the rest is ash or other trace components, the total amount is 100%

[0031] 2. Process conditions: 10,000g of vanadium-titanium iron concentrate is crushed to -160+200 mesh, accounting for 75%, adding 18% of the original ore weight with a particle size of -180 mesh, accounting for 80% of coke, and adding 3% of the original ore weight of solid lignosulfur Calcium acid binder and vanadium-titanium ferrite concentrate are lubricated for 1.0h, and pellets with a diameter of 30-40mm are made into pellets with a spherical egg forming machine, dried at 250°C for 4h, and reduced in a tunnel kiln, with the temperature controlled at 1200-1250°C. Time 12h. After reduction, carry out ...

Embodiment 3

[0033] 1. The chemical composition weight percentage of vanadium-titanium iron concentrate is: TFe 56.54~58.01%, TiO 2 11.39~12.94%, V 2 o 3 0.58~0.62%, Cr 2 o 3 0.081~0.094%, SiO 2 2.71~2.99%, Al 2 o 3 2.64~2.97%, CaO 1.54~1.77%, MgO 2.64~2.98%, MnO 0.17~0.20%, S 0.04~0.06% and P 0.0011~0.0014%, the rest is ash or other trace components, the total amount is 100%.

[0034] 2. Process conditions: 50,000g of vanadium-titanium iron concentrate is ground to -160+200 mesh, accounting for 75%, adding 22% of the original ore weight with a particle size of -200 mesh, accounting for 60% of charcoal and adding 3.5% of the original ore weight of solid lignosulfonic acid Calcium binder and vanadium-titanium ferrite concentrate are lubricated and ground for 0.5h, and pellets with a diameter of 35-40mm are formed by a spherical egg forming machine, dried at 250°C for 4h, and reduced in a tunnel kiln. The temperature is controlled at 1200-1250°C. 12h. After reduction, carry out co...

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Abstract

The invention relates to an iron powder production method by using a tunnel kiln to reduce concentrate pellets containing carbon vanadium ferrotitanium with titanium slag and vanadium pentoxide as combined products. Concentrate pellets are made from vanadium-titanium iron concentrate through crashing and damp milling. The iron powder and tailings are obtained by putting the concentrate pellets into the tunnel kiln to be reduced, crashing, wet-grinding, magnetic separation and gravity separation. The tailings are soaked with titania waste acid to eliminate remnants magnesium and iron. Then the tailings are filtrated and dried to obtain a new material. And then the new material is added with sodium salt to do salt roast and then to be soaked by water, then titanium slag and sodium vanadate are obtained respectively after the water soaking. At last, the vanadium pentoxide is obtained by ammonium vanadate precipitating and calcination deaminase to the sodium vanadate liquid. The invention eliminates the disadvantage of high energy consumption by electric furnace smelting and bad separating effect of vanadium and titanium, difficult control of vanadium and titanium trend and low yield rate of extracting vanadium and titanium through converter blowing iron molten, etc. The invention has the advantages of high yield rate of vanadium, titanium and iron and high resources utilization rate and explores a novel practical way for comprehensive utilization of vanadium, titanium and iron concentrate ore.

Description

[0001] 1. Technical field: The present invention relates to a treatment method for comprehensive utilization of vanadium-titanium iron concentrate, in particular a method for extracting iron, vanadium and titanium from vanadium-titanium iron concentrate, which belongs to the field of metallurgy. 2. Background technology: [0002] my country's Panxi region contains extremely rich vanadium-titanium magnetite resources, and the reserves of vanadium in vanadium-titanium magnetite (according to V 2 o 5 Calculation) has 15.7 million tons, accounting for more than 60% of the country, ranking first in the country; accounting for 11.6% of the world, ranking fourth in the world; titanium resource reserves (in terms of TiO 2 Total) is 870 million tons, accounting for 90.54% of domestic reserves, accounting for 35.17% of the world, ranking first in the world. At present, the utilization of vanadium-titanium-iron concentrate in Panxi is mainly through blast furnace ironmaking to obtain mo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B1/00C22B1/14C22B3/04C22B1/02C21B15/00C22B34/22C22B34/12
CPCY02P10/20
Inventor 汪云华范兴祥何德武
Owner 攀枝花锐龙冶化材料开发有限公司
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