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Method for comprehensive utilization of vanadium titanium and iron ore concentrate by using rotary hearth furnace reduction-grinding - separation

A vanadium-titanium-iron concentrate and rotary hearth furnace technology, applied in the metallurgical field, can solve the problems of increased energy consumption, long reduction time and the like, and achieve the effects of low cost, short reduction time and fast reaction rate

Inactive Publication Date: 2008-02-06
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

Due to the use of tunnel kiln reduction, the temperature is difficult to rise, the reduction time is long, and the energy consumption required for reduction increases

Method used

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  • Method for comprehensive utilization of vanadium titanium and iron ore concentrate by using rotary hearth furnace 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 as follows: TFe 58.44~59.13%, TiO 2 10.47~12.83, TiO 2 0.61~0.65, 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: 10,000g of vanadium-titanium iron concentrate is ground to less than 120 mesh, of which -140+180 mesh accounts for 80%, and 19% of the original ore weight is added with a particle size of -180 mesh, accounting for 70% of coke and 2.5% of the original ore weight. Calcium lignosulfonate binder and vanadium-titanium iron concentrate were lubricated and ground for 0.5h, and pellets with a diameter of 20-30mm were made into pellets with a spherical egg forming machine, dried at 250°C for 4h, and reduced in a rotary hearth furnace, and the temperature was controlled at 13...

Embodiment 2

[0030]1. The chemical composition weight percentage of vanadium-titanium iron concentrate is as follows: 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: 20,000g of vanadium-titanium iron concentrate is ground to -140+180 mesh, accounting for 80%, adding coal powder with a particle size of -180 mesh of 19% of the original ore weight, accounting for 70% of the original ore weight, and adding 4% of the original ore weight of solid lignin Calcium sulfonate binder and vanadium-titanium-iron concentrate were lubricated and ground for 0.5h, and pellets with a diameter of 25-40mm were made into pellets with a spherical egg forming machine, dried at 250°C for 4h, and quickly reduced in a rotary hearth furnace, and the tempera...

Embodiment 3

[0033] 1. The chemical composition weight percentage of vanadium-titanium iron concentrate is as follows: TFe 56.54~58.01%, TiO 2 11.39~12.94%, TiO 2 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 -140+180 mesh, accounting for 80%, adding 22% of the original ore weight with a particle size of -200 mesh, accounting for 60% of charcoal, and adding 5% of the original ore weight of solid lignosulfonic acid Calcium binder and vanadium-titanium-iron concentrate are lubricated for 0.5h, and pellets with a diameter of 30-40mm are made into pellets with a ball forming machine, dried at 250°C for 4h, and reduced in a rotary hearth furnace with the temperature controlled at 1350±50°C. 20min. After reduction, ca...

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Abstract

The present invention relates to a method of using a rotary hearth furnace to deoxidize the ore concentrate pellets containing carbon and vanadium and titanium and iron for producing iron powder and joint titanium slag and vanadic oxide. The vanadium and titanium and iron ore concentrate is made into pellets positioned in the rotary hearth furnace for deoxidizing and then crashing, after the wetmilling, the crashed pellets are dressed by the magnetic separation and reelected to get the iron powder and the mine tailing, which is lixiviated by titanium dioxide waste acid to remove the titanium slag and the sodium vanadate solution, at last, the sodium vanadate solution is added with sodium salt to sink vanadium, and calcinations to remove ammonia, thereby getting the vanadic oxide product. The present invention eliminates the shortcomings that the fusion energy consumption of the electric furnace is high, the separation effect of vanadium and titanium is bad, the run of vanadium and titanium is difficult to control, and the yield of extracting vanadium and titanium from the molten iron blown in the rotary hearth furnace is low. The present invention has the advantages of high yield of vanadium and titanium and iron and high utilization rate of resources, and develops a doable new route for the comprehensive utilization of the vanadium and titanium and iron ore concentrate.

Description

1. Technical field: [0001] The invention relates to a processing method for comprehensive utilization of vanadium-titanium iron concentrate, in particular to a method for extracting iron, vanadium and titanium from vanadium-titanium iron concentrate by reduction-grinding in a rotary hearth furnace, and 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...

Claims

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Application Information

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IPC IPC(8): C22B1/00C22B1/14C22B3/04C22B1/02C21B15/00C22B34/22C22B34/12
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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