Treatment system and method for vanadium extraction tailings

A technology for extracting vanadium tailings and inlet, which is applied in the field of treatment systems for vanadium extraction tailings, and can solve problems such as less research

Pending Publication Date: 2017-05-10
JIANGSU PROVINCE METALLURGICAL DESIGN INST
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, for the extraction of titanium in the tailings of vanadium ex

Method used

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  • Treatment system and method for vanadium extraction tailings
  • Treatment system and method for vanadium extraction tailings

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Experimental program
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Effect test

Embodiment 1

[0054] Vanadium extraction tailings (TFe 38wt%, TiO 2 12wt%), titanium concentrate (TiO 2 45wt%), anthracite and then pelletized in a disc granulator to obtain pellets. Wherein, the mass ratio of each component is: vanadium extraction tailings: titanium concentrate: anthracite = 100:60:20. After the pellets are dried, they are reduced and roasted in a rotary hearth furnace at 1350° C. to obtain metallized pellets. Then, the metallized pellets are subjected to grinding and magnetic separation using a linkage device of a ball mill and a magnetic separator to obtain metallic iron powder and titanium slag. The iron grade in the obtained metal iron powder is 97.8%, and the recovery rate is 97.5%; in the titanium slag, TiO 2 The mass fraction is 55.3%, and the recovery rate is 98.8%.

Embodiment 2

[0056] Vanadium extraction tailings (TFe 30wt%, TiO 2 15wt%), titanium concentrate (TiO 2 47wt%) and coke are mixed evenly, and then briquetting is carried out by a roller briquetting machine to obtain pellets. Wherein, the mass ratio of each component is: vanadium extraction tailings: titanium concentrate: coke = 100:100:25. After the pellets are dried, they are reduced and roasted in a rotary kiln at 1400°C to obtain metallized pellets. Then, the metallized pellets are subjected to grinding and magnetic separation using a linkage device of a ball mill and a magnetic separator to obtain metallic iron powder and titanium slag. The iron grade in the obtained metal iron powder is 98.6%, and the recovery rate is 98.3%; in the titanium slag, TiO 2 The mass fraction is 58.4%, and the recovery rate is 99.3%.

Embodiment 3

[0058] Vanadium extraction tailings (TFe 35wt%, TiO 2 19wt%), titanium concentrate (TiO 2 50wt%) and semi-coke are mixed and pelletized in a disc granulator to obtain pellets. Wherein, the mass ratio of each component is: vanadium extraction tailings: titanium concentrate: semi-coke = 100:150:30. After the pellets are dried, they are reduced and roasted in a tunnel kiln at 1450°C to obtain metallized pellets. Then, the metallized pellets are subjected to grinding and magnetic separation using a linkage device of a ball mill and a magnetic separator to obtain metallic iron powder and titanium slag. The iron grade in the obtained metal iron powder is 99.1%, and the recovery rate is 98.6%; in the titanium slag, TiO 2 The mass fraction is 60.6%, and the recovery rate is 99.8%.

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Abstract

The invention relates to a treatment system and method for vanadium extraction tailings. The system comprises a blending device, a pelletizing device, a reduction device and an ore grinding and magnetic separation device which are sequentially connected. The method comprises the steps that the vanadium extraction tailings, titanium concentrate and a carbonaceous reducing agent are blended in the blending device, so that a blended material is obtained; the blended material is pelletized in the pelletizing device to obtain pellets; the pellets are subjected to reduction treatment in a reduction furnace, so that metalized pellets are obtained; and the metalized pellets are treated through the ore grinding and magnetic separation device, and metallic iron powder and titanium tailings are obtained. By adding the titanium concentrate, the technical problem that the titanium recovery rate of low-titanium-content vanadium extraction tailings is low is solved, the recovery rate can reach 98% or over, and the novel method for comprehensive recycling of the vanadium extraction tailings is provided.

Description

technical field [0001] The invention relates to the field of metal smelting, in particular to a treatment system and method for vanadium extraction tailings. Background technique [0002] Vanadium extraction tailings are solid wastes produced after vanadium oxides are extracted from converter vanadium slag through sodium oxide roasting, acid leaching and other processes. The vanadium-titanium magnetite of Panzhihua Iron and Steel Co., Ltd. can be smelted in a blast furnace to obtain vanadium-containing pig iron, and then the vanadium is oxidized by selective oxidation of molten iron and then enters the slag to obtain vanadium pentoxide with a content of 14-22wt% (wt% is mass percentage). The leaching slag is obtained after sodium oxide roasting and leaching, that is, vanadium extraction tailings. National vanadium extraction enterprises discharge approximately 300,000 tons of vanadium extraction tailings every year, and with the continuous expansion of production capacity o...

Claims

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Application Information

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IPC IPC(8): C22B1/248C21B13/00C22B34/22
CPCC21B13/00C22B1/2406C22B1/248C22B34/22Y02P10/20
Inventor 宋文臣王静静李红科曹志成薛逊吴道洪
Owner JIANGSU PROVINCE METALLURGICAL DESIGN INST
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