Method for preparing ferro-titantium, steel and ferrovanadium from vanadium-titantium iron headings

A technology for vanadium-titanium-iron concentrate and ferro-titanium, which is applied in the metallurgical field, can solve the problems of difficult disposal of pollutants, long process, large consumption of refractory materials, etc., and achieves uncontrolled production scale, low energy consumption, and low environmental pollution. Effect

Inactive Publication Date: 2006-03-08
梅卫东
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Problems solved by technology

[0009] The disadvantages of the first type of blast furnace-converter process mainly include: (1) The vanadium-titanium iron concentrate contains 12% TiO 2 , forming slag in blast furnace smelting, and >20% TiO in blast furnace slag 2 cannot be recycled
(2) The process uses the dual method to extract vanadium and make steel. A batch of molten iron needs to be smelted twice in the converter to complete the process of vanadium extraction and steelmaking, which cannot make full use of the production capacity of the converter.
According to statistics, the loss of molten steel in smelting is 5%, which reduces the iron recovery of vanadium-titanium iron concentrate
(4) The semi-steel after vanadium extraction has insufficient heat during steelmaking, so a large amount of scrap steel cannot be used in the steelmaking process, and the relative cost of steelmaking is relatively high
(5) Vanadium extraction by converter prolongs the smelting process of iron→steel for more than 20 minutes, which brings certain difficulties to the production organization of iron→steel→continuous casting when the continuous casting process is adopted
[0010] The main problems of the second vanadium-first iron flow process are: (1) the same batch of vanadium-titanium-iron concentrate must be roasted at high temperature twice (sodiumization and reduction) to obtain V 2 o 5 Vanadium-containing aqueous solution and iron with a concentration of 10g/L require a large amount of raw material processing, long process and high cost
The amount of residue after the titanium extraction process can be 30%, which is five times that of using titanium concentrate, so that the titanium slag, an in

Method used

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  • Method for preparing ferro-titantium, steel and ferrovanadium from vanadium-titantium iron headings

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] Embodiment 1, single slag method for extracting vanadium

[0051] 1. Mix 94% vanadium-titanium-iron ore concentrate (weight percentage, the same below), 3% sodium carbonate and 3% syrup evenly, pelletize with a pelletizer, and dry in a drying kiln to form ore pellets.

[0052] 2. Mix materials according to the ratio of 75% of ore balls and 25% of coke powder, put them into refractory tanks, and put the refractory tanks on tunnel kiln cars for reduction.

[0053] 3. After the reduction is completed, the kiln is forced to cool by blowing air and then exit the kiln.

[0054] 4. When the carbon content of the pellets is less than 0.6%, the melting requires carbon distribution. The carbon distribution is 5% of the weight of the pellets, and it enters the electric furnace through the feeding system. When the total iron in the slag is less than 3%, put the slag into the slag vat, and then discharge half of the molten steel.

[0055] 5. Add lime and iron scale to the tundish ...

Embodiment 2

[0062] Embodiment 2, single slag method for extracting vanadium

[0063] 1. Mix 91% vanadium-titanium-iron ore concentrate (percentage by weight, the same below), 5% potassium carbonate and 4% syrup evenly, pelletize with a pelletizer, and dry in a drying kiln to form ore pellets.

[0064] 2. Mix materials according to the ratio of 73% of ore balls and 27% of coke powder, put them into a refractory tank, and put the refractory tank on a tunnel kiln car for reduction.

[0065] 3. After the reduction is completed, the kiln is forced to cool by blowing air and then exit the kiln.

[0066] 4. When the carbon content of the pellets is less than 0.6%, the melting requires carbon distribution. The carbon distribution is 6% of the weight of the pellets, and it enters the electric furnace through the feeding system. When the total iron in the slag is less than 3%, put the slag into the slag vat, and then discharge half of the molten steel.

[0067] 5. Add lime and iron scale to the t...

Embodiment 3

[0074] Embodiment 3: Double slag method for extracting vanadium

[0075] 1. Mix the organic matter extracted from 89% vanadium-titanium ferrite concentrate, 6% sodium chloride and 5% humic coal evenly, make pellets with a pelletizer, and dry them in a drying kiln to form ore pellets.

[0076] 2. Mix materials according to the ratio of 70% ore balls and 30% coke powder, put them into refractory tanks, and put the refractory tanks on tunnel kiln cars for reduction.

[0077] 3. After the reduction is completed, it is forced to cool by blowing air and then exits the kiln.

[0078] 4. When the carbon content of the metallized ball is less than 0.6%, the carbon is melted and distributed, and the carbon content is 8% of the weight of the pellet, and it enters the electric furnace through the feeding system. When the total iron in the slag is less than 3%, put the slag into the slag vat, and then discharge half of the molten steel.

[0079] 5. Add lime and iron scale to the tundish ...

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Abstract

This invention provides a method for manufacturing FeTi, steel and FeV with FeVTi mineral concentrate including the following steps: 1, adding alkali metal to recover FeTiV mineral concentrate, 2, smelting and separating recovered Fe, 3, dephosphorizing of iron melt containing V, 4, entering into the steel converter to blow V melting and casting, 5, melting iron melt containing V with steel slag to air-refine V-rich slag with oxygen, 6, melting FeV with the V-rich slag, 7, smelting FeTi by melting slag. The advantages are: 1, avoiding the shortcoming of not recovering Ti in the converter and single-slag return flow and avoiding the shortcoming of low recovery rate of Fe in the Fe first and V second flow, 2, turning slag into the raw material of cement by adjusting composition of the smelted solvent, 3, avoiding complicated V-extraction composition of the technology by immersion.

Description

technical field [0001] The invention relates to the field of metallurgy, in particular to a method for preparing ferro-titanium, steel and ferro-vanadium from ferro-vanadium-titanium concentrate. Background technique [0002] The utilization of vanadium-titanium iron ore concentrate, the methods currently adopted mainly include: [0003] 1. Blast furnace-converter process. The process uses an ordinary blast furnace to smelt molten iron containing 0.4% V under the conditions of large air volume, high humidity and acidic slag, and then uses a top-blown converter to oxidize the V in the molten iron to V 2 o 5 The content is 14% vanadium slag, and the obtained semi-steel is made with another converter, and the vanadium slag is extracted by water method to produce V with a content > 99%. 2 o 5 , and then the V 2 o 5 Smelted into ferrovanadium. [0004] 2. Process of vanadium first and then iron. The process uses a rotary kiln to sodiumize and roast the vanadium-titaniu...

Claims

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Application Information

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IPC IPC(8): C22C33/04C22C38/00C22B5/00C21C7/00
Inventor 梅卫东
Owner 梅卫东
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