Method for extracting multi-metallic element from high chromium vanadium titanium octahedral iron ore

A technology for vanadium titanomagnetite and metal elements, applied in the field of metal smelting, can solve the problems of inability to recover titanium resources, waste of resources, complicated procedures, etc., and achieve the effects of reducing water consumption, being difficult to break and rolling, and reducing environmental pollution.

Inactive Publication Date: 2008-10-29
PANGANG GROUP RESEARCH INSTITUTE CO LTD +1
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AI Technical Summary

Problems solved by technology

[0003] The chromium content of Panzhihua vanadium-titanium magnetite that has been developed and utilized is very low. The [Cr] that enters molten iron after blast furnace smelting has no recovery value. The current blast furnace ironmaking-converter vanadium extraction process only recovers iron and vanadium, and a large amount of Titanium enters the blast furnace slag and its content is low (TiO in slag 2 content of about 22%), there is no reasonable and effective economic means to recycle, resulting in a waste of titanium resources
The behaviors of chromium and vanadium in the smelting process are very similar. If high chromium vanadium titanium magnetite adopts blast furnace ironmaking-converter vanadium extraction process, although chromium can be recovered in the process of recovering vanadium, titanium resources cannot be recovered, which will lead to The comprehensive utilization rate of mineral resources is low
[0004] Traditional rotary kilns, tunnel kilns, shaft furnaces and other reduction furnaces combined with electric furnaces have some research and production practice on the comprehensive extraction of multi-metal elements from vanadium-titanium magnetite, but the common problems are low direct reduction temperature and high requirements for reducing atmosphere. The metallization rate is not high, the production capacity is small, and the chromium element cannot be extracted, etc.
The problem that this method exists is: (1) in the pelletizing process, adopt the mode of wrapping reducing agent powder outside pelletizing in the follow-up pelletizing machine, the reducing agent powder adhesion is poor, it is difficult to control to the required level of carbon content required; ( 2) The melting temperature of the electric furna

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  • Method for extracting multi-metallic element from high chromium vanadium titanium octahedral iron ore

Examples

Experimental program
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Example Embodiment

[0030] Example 1

[0031] The high chromium vanadium titanomagnetite concentrate (main components: TFe: 54.01%, FeO: 27.02%, V 2 O 5 : 0.56%, Cr 2 O 3 : 1.58%, TiO 2 : 12.18%) After mixing the ingredients, press them into elliptical carbon pellets with a diameter of 25mm, dry them at 120°C and send them to a rotary hearth furnace, reduce at 1350°C for 60 minutes, and the thickness of the material layer is 100mm. %O 2 =1.0, %CO / %CO 2 =0.9, the metallization rate of pellets after reduction reaches 91.5%, the residual carbon content is 3.7%, and the production capacity reaches 100kg / (m 2 .h), N 2 The metallized pellets discharged from the rotary hearth furnace are protected by gas; then the metallized pellets at a temperature of 300 ° C are loaded into the electric furnace and 8% of the total weight of the pellets is added with coal powder, and after smelting at a temperature of 1560 ° C for a certain period of time 10% of the total weight of the pellets was added with pu...

Example Embodiment

[0032] Embodiment 2

[0033] The high-chromium vanadium titanomagnetite concentrate (the main components are the same as those in Example 1) are mixed and pressed into oval-shaped carbon pellets with a diameter of 38 mm, dried at a temperature of 180 ° C and sent to a rotary hearth furnace, and reduced at 1400 ° C. 50min, the thickness of the material layer is 160mm, the %O in the furnace during the reduction process 2 =1.2, %CO / %CO 2 =1.8, the metallization rate of pellets after reduction reaches 92.1%, the residual carbon content is 3.1%, and the production capacity reaches 125kg / (m 2 .h); then the metallized pellets are directly hot-loaded into an electric furnace and coke powder with 15% of the total pellet weight is added, smelted at a temperature of 1600 ° C for 100 min, and separated to obtain TiO 2 Titanium slag with a content of 51%, after blowing the molten iron obtained by smelting, obtains V 2 O 5 =6.1%, Cr 2 O 3 = 16.3% vanadium-chromium slag and semi-steel;...

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Abstract

The invention discloses a method for extracting various metal elements from high chromium-vanadium titanomagnetite. The method is characterized in that high chromium-vanadium titanomagnetite concentrate is put in a rotary hearth furnace for direct reduction after feeding, briquetting and drying; during the reduction process, metallized pellets are obtained through the adjustment and the control of technological parameters such as reduction temperature, reducing atmosphere, etc., wherein, the metallization rate of the metallized pellets is more than 90 percent, and the carbon residue content thereof is 0.5 to 4.5 percent. The obtained metallized pellets are put in an electric stove, and then carbon-containing reducing agent that is pellets for smelting, wherein, the weight of the carbon-containing reducing agent is 8 to 35 percent of the metallized pellets; therefore, titanium slag and vanadium-chromium hot metal are obtained; the vanadium-chromium hot metal is performed through converting by the control of time and temperature under certain oxygen tension to obtain vanadium-chromium slag and semisteel. The titanium slag is processed through the existing technology of a sulfuric acid method or a chlorination method, the vanadium-chromium slag is processed according to certain working procedures, and then TiO2, V2O5 and Cr2O3 are finally extracted and obtained.

Description

technical field [0001] The invention belongs to the field of metal smelting, and in particular relates to a method for extracting various metal elements from high-chromium vanadium-titanium magnetite Background technique [0002] High-chromium vanadium-titanium magnetite is a compound ore mainly composed of iron, and multi-metal elements such as titanium, vanadium, and chromium are symbiotic. The reserves of high-chromium vanadium-titanium magnetite in Panzhihua Honggenan mining area are huge, and it is currently the largest in my country. One of the vanadium-titanium magnetite deposits. Compared with the vanadium-titanium magnetite in other mining areas in Panxi area, the high-chromium vanadium-titanium magnetite has the same content of iron, vanadium and titanium, but the chromium content is much higher. 2 o 3 up to 1.8%. The deposit is a polymetallic comprehensive utilization deposit with great economic value. [0003] The chromium content of Panzhihua vanadium-titaniu...

Claims

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Application Information

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IPC IPC(8): C22B1/02C22B34/22C22B34/32C22B5/10
Inventor 刘功国薛逊邓君李桂军
Owner PANGANG GROUP RESEARCH INSTITUTE CO LTD
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