Method for comprehensively utilizing vanadium and titanium resources of vanadium titano-magnetite

Abstract

The invention belongs to the field of chemical engineering and metallurgy, and particularly discloses a method for comprehensively utilizing vanadium and titanium resources of vanadium titano-magnetite. Vanadium slag obtained in the vanadium blowing procedure is returned to the electric furnace melting separation procedure, vanadium is opened from titanium slag, the vanadium extraction path is changed, vanadium-titanium co-extraction is achieved, and the vanadium extraction tailing treatment problem is thoroughly solved. The crushing particle size of the vanadium-containing titanium slag is controlled, fine-particle carbon powder and a binder are added for granulation, ore / carbon contact is enhanced, catalytic chlorination is coupled, and therefore the chlorination reaction temperature is reduced, and the utilization problem of high-calcium magnesium and titanium resources is solved. A vanadium-iron alloy is directly smelted by adding a reducing agent and steel scraps into titanium tetrachloride vanadium removing dry slag, and therefore preparation of a vanadium pentoxide intermediate product is omitted, the process is greatly shortened, and the production cost is reduced. The method can realize comprehensive utilization of the vanadium and titanium resources in the vanadium titano-magnetite to respectively obtain titanium tetrachloride and ferrovanadium alloy products, and has the advantages of being high in resource utilization rate, capable of achieving energy conservation and consumption reduction, friendly to environment, high in product added value and the like.

Description

technical field

[0001] The invention belongs to the fields of chemical industry and metallurgy, and particularly relates to a method for comprehensive utilization of vanadium-titanium magnetite, vanadium-titanium resources. Background technique

[0002] my country is a country rich in vanadium and titanium resources, and the reserves of vanadium and titanium mines account for more than 35% of the world's total. Vanadium-titanium magnetite is its main form. Vanadium-titanium magnetite is an important strategic vanadium-titanium resource in my country.

[0003] At present, my country's vanadium-titanium magnetite mainly adopts the blast furnace smelting process. The vanadium-titanium magnetite is mixed with ordinary iron ore and sent to the blast furnace for smelting to obtain vanadium-containing molten iron and titanium-containing blast furnace slag, and the vanadium-containing molten iron is blown to obtain vanadium slag and semi-steel. Vanadium slag undergoes sodiumizati...

Examples

Embodiment 1

[0045] combine figure 1 , a method for comprehensive utilization of vanadium-titanium-magnetite vanadium-titanium resources used in this embodiment, comprising cyclone preheating process 1, fluidized bed pre-reduction process 2, electric furnace melting process 3, vanadium blowing process 4, cooling and crushing Process 5, granulation and screening process 6, fluidized chlorination process 7, refining vanadium removal process 8, oxidation treatment process 9 and ferrovanadium smelting process 10, the method is carried out according to the following steps:

[0046] 1) The vanadium-titanium magnetite is sent to the cyclone preheating process 1 to exchange heat with the high-temperature fluidized bed flue gas from the fluidized bed pre-reduction process 2, and the vanadium-titanium magnetite after heat exchange is sent to the fluidized bed pre-reduction process 2. The tail gas from the cyclone preheating process is sent to environmental protection treatment;

[0047] 2) In the f...

Embodiment 2

[0056] This embodiment adopts the method for the comprehensive utilization of vanadium-titanium-magnetite vanadium-titanium resources described in Example 1. In the fluidized bed pre-reduction process 2, the operating temperature is 600 ° C, the reducing gas is blast furnace gas, and the metallization rate is 10%. . The solid reducing agent in the electric furnace melting process 3 is coal powder, the operating temperature is 1400° C., the amount of solid reducing agent added is 10% of the mass of vanadium titanomagnetite, and the vanadium concentration in titanium slag is 1% of the vanadium concentration in molten iron. times. The vanadium slag obtained in the vanadium blowing step 4 is returned to the electric furnace melting step 3 again. In the cooling and crushing step 5, the average particle size of the vanadium-containing titanium slag after crushing is 0.1 μm. In the granulation and screening step 6, activated carbon with an average particle size of 0.1 μm is used as...

Embodiment 3

[0058] This embodiment adopts the method for comprehensive utilization of vanadium-titanium magnetite vanadium-titanium resources described in Example 1. In the fluidized bed pre-reduction process 2, the operating temperature is 960 ° C, the reducing gas is methane reformed gas, and the metallization rate 60%. The solid reducing agent in the electric furnace melting process 3 is petroleum coke, the operating temperature is 1800° C., the amount of solid reducing agent added is 40% of the mass of vanadium titanomagnetite, and the vanadium concentration in titanium slag is 5% of the vanadium concentration in molten iron. times. The vanadium slag obtained in the vanadium blowing step 4 is returned to the electric furnace melting step 3 again. In the cooling and crushing step 5, the crushed vanadium-containing titanium slag has an average particle size of 50 μm. In the granulation and screening step 6, coal powder with an average particle size of 50 μm is used as the carbon powde...

technical field

[0001] The invention belongs to the fields of chemical industry and metallurgy, and particularly relates to a method for comprehensive utilization of vanadium-titanium magnetite, vanadium-titanium resources. Background technique

[0002] my country is a country rich in vanadium and titanium resources, and the reserves of vanadium and titanium mines account for more than 35% of the world's total. Vanadium-titanium magnetite is its main form. Vanadium-titanium magnetite is an important strategic vanadium-titanium resource in my country.

[0003] At present, my country's vanadium-titanium magnetite mainly adopts the blast furnace smelting process. The vanadium-titanium magnetite is mixed with ordinary iron ore and sent to the blast furnace for smelting to obtain vanadium-containing molten iron and titanium-containing blast furnace slag, and the vanadium-containing molten iron is blown to obtain vanadium slag and semi-steel. Vanadium slag undergoes sodiumizati...

Examples

Embodiment 1

[0045] combine figure 1 , a method for comprehensive utilization of vanadium-titanium-magnetite vanadium-titanium resources used in this embodiment, comprising cyclone preheating process 1, fluidized bed pre-reduction process 2, electric furnace melting process 3, vanadium blowing process 4, cooling and crushing Process 5, granulation and screening process 6, fluidized chlorination process 7, refining vanadium removal process 8, oxidation treatment process 9 and ferrovanadium smelting process 10, the method is carried out according to the following steps:

[0046] 1) The vanadium-titanium magnetite is sent to the cyclone preheating process 1 to exchange heat with the high-temperature fluidized bed flue gas from the fluidized bed pre-reduction process 2, and the vanadium-titanium magnetite after heat exchange is sent to the fluidized bed pre-reduction process 2. The tail gas from the cyclone preheating process is sent to environmental protection treatment;

[0047] 2) In the f...

Embodiment 2

[0056] This embodiment adopts the method for the comprehensive utilization of vanadium-titanium-magnetite vanadium-titanium resources described in Example 1. In the fluidized bed pre-reduction process 2, the operating temperature is 600 ° C, the reducing gas is blast furnace gas, and the metallization rate is 10%. . The solid reducing agent in the electric furnace melting process 3 is coal powder, the operating temperature is 1400° C., the amount of solid reducing agent added is 10% of the mass of vanadium titanomagnetite, and the vanadium concentration in titanium slag is 1% of the vanadium concentration in molten iron. times. The vanadium slag obtained in the vanadium blowing step 4 is returned to the electric furnace melting step 3 again. In the cooling and crushing step 5, the average particle size of the vanadium-containing titanium slag after crushing is 0.1 μm. In the granulation and screening step 6, activated carbon with an average particle size of 0.1 μm is used as...

Embodiment 3

[0058] This embodiment adopts the method for comprehensive utilization of vanadium-titanium magnetite vanadium-titanium resources described in Example 1. In the fluidized bed pre-reduction process 2, the operating temperature is 960 ° C, the reducing gas is methane reformed gas, and the metallization rate 60%. The solid reducing agent in the electric furnace melting process 3 is petroleum coke, the operating temperature is 1800° C., the amount of solid reducing agent added is 40% of the mass of vanadium titanomagnetite, and the vanadium concentration in titanium slag is 5% of the vanadium concentration in molten iron. times. The vanadium slag obtained in the vanadium blowing step 4 is returned to the electric furnace melting step 3 again. In the cooling and crushing step 5, the crushed vanadium-containing titanium slag has an average particle size of 50 μm. In the granulation and screening step 6, coal powder with an average particle size of 50 μm is used as the carbon powde...

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