Process for comprehensively utilizing vanadium titano-magnetite via prereduction-electric furnace deep reduction-fluorination method

A vanadium-titanium magnetite and vanadium-titanium magnet technology, applied in the direction of titanium dioxide, process efficiency improvement, titanium oxide/hydroxide, etc., can solve problems such as difficult separation, difficult recovery of titanium resources, and difficult control of slag iron, etc., to achieve The effects of high grade titanium slag, great economic advantages, and great environmental protection advantages

Active Publication Date: 2019-11-22
CENT SOUTH UNIV
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Problems solved by technology

[0006] In view of the problems existing in the smelting process of vanadium-titanium magnetite in the prior art that the reduction direction of titanium and vanadium oxides is difficult to control, the slag and iron are difficult to separate, and the titanium resources are difficult to recover, the purpose of the present in

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  • Process for comprehensively utilizing vanadium titano-magnetite via prereduction-electric furnace deep reduction-fluorination method

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Experimental program
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Embodiment 1

[0030] A kind of pre-reduction-electric furnace deep reduction-fluorination method comprehensively utilizes the technology of vanadium-titanium magnetite, comprising the following steps:

[0031] (1) Pre-reduce the vanadium-titanium magnetite oxidized pellets to obtain the main chemical composition content of the vanadium-titanium magnetite pre-reduced pellets: TFe: 71.38%, MFe=64.56%, TiO 2 : 15.53%, V 2 o 5 :0.82%, SiO 2 =3.71%, vanadium-titanium-magnetite pre-reduced pellets with a metallization rate of 90.45%; put the vanadium-titanium-magnetite pre-reduced pellets, limestone, and reducing agent into the electric furnace for deep reduction smelting, and quicklime is added according to the pre-mixed alkali Degree 1.2, smelting temperature 1550°C, smelting time 60min, separated to obtain vanadium-containing pig iron and TiO 2 51.6% titanium-containing slag;

[0032] (2) Gained vanadium-containing molten iron is used for vanadium extraction in converter or separated semi-...

Embodiment 2

[0036] A kind of pre-reduction-electric furnace deep reduction-fluorination method comprehensively utilizes the technology of vanadium-titanium magnetite, comprising the following steps:

[0037] (1) Pre-reduce the vanadium-titanium magnetite oxidized pellets to obtain the main chemical composition content of the vanadium-titanium magnetite pre-reduced pellets: TFe: 71.38%, MFe=64.56%, TiO 2 : 15.53%, V 2 o 5 :0.82%, SiO 2 =3.71%, vanadium-titanium-magnetite pre-reduced pellets with a metallization rate of 90.45%; put the vanadium-titanium-magnetite pre-reduced pellets, limestone, and reducing agent into the electric furnace for deep reduction smelting, and quicklime is added according to the pre-mixed alkali The temperature is 1.4, the smelting temperature is 1600℃, and the smelting time is 40min, and the vanadium-containing pig iron and TiO are separated 2 50.3% titanium-containing slag;

[0038] (2) Gained vanadium-containing molten iron is used for vanadium extraction ...

Embodiment 3

[0042] A kind of pre-reduction-electric furnace deep reduction-fluorination method comprehensively utilizes the technology of vanadium-titanium magnetite, comprising the following steps:

[0043] (1) Pre-reduce the vanadium-titanium magnetite oxidized pellets to obtain the main chemical composition content of the vanadium-titanium magnetite pre-reduced pellets: TFe: 71.38%, MFe=64.56%, TiO 2 : 15.53%, V 2 o 5 :0.82%, SiO 2 =3.71%, vanadium-titanium-magnetite pre-reduced pellets with a metallization rate of 90.45%; put the vanadium-titanium-magnetite pre-reduced pellets, limestone, and reducing agent into the electric furnace for deep reduction smelting, and quicklime is added according to the pre-mixed alkali The temperature is 1.5, the smelting temperature is 1650°C, and the smelting time is 20 minutes, and the vanadium-containing pig iron and TiO are separated 2 49.7% titanium-containing slag;

[0044] (2) Gained vanadium-containing molten iron is used for vanadium extra...

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Abstract

The invention discloses a process for comprehensively utilizing a vanadium titano-magnetite via prereduction-electric furnace deep reduction-fluorination method. According to the process, a vanadium titano-magnetite pellet is firstly prereduced; the prereduced pellet is fed into an electric furnace for deep reduction so as to obtain vanadium-containing pig iron and titanium-containing slags; in the electric furnace smelting process, a calcium-containing flux is added for slag adjustment so as to ensure that the main titanium-containing phase of the slags are of a perovskite phase which is difficult to reduce, so that benefit is brought to restrain the reduction of the titanium oxides; and the titanium-containing slags which take perovskite as the main phase adopts a fluorination method toprepare titanium dioxide, and the vanadium molten iron adopts converter to extract vanadium, so that the comprehensive utilization of the vanadium titano-magnetite can be realized. Compared with the blast furnace process, the process disclosed by the invention is capable of realizing the full-schreyerite smelting, making the produced titanium slag taste high, recycling the titanium resources and decreasing the serious pollution processes such as sintering, coking, blast furnace and the like so as to have a relatively high environment-friendly advantage, and is capable of reducing the investment and production cost so as to have a relatively high economic advantage.

Description

technical field [0001] The invention belongs to the field of comprehensive utilization of vanadium-titanium ore, and relates to a process for comprehensively utilizing vanadium-titanium magnetite by a pre-reduction-electric furnace deep reduction-fluorination method. Background technique [0002] my country has huge reserves of vanadium-titanium magnetite resources, but the overall level of development and utilization is still very low. Taking vanadium-titanium magnetite resources in Panxi area as an example, in the production process dominated by steel, the current recovery and utilization of titanium and vanadium Therefore, improving the comprehensive utilization level of my country's vanadium-titanium magnetite resources is of great significance to the development of my country's steel and vanadium-titanium industries. [0003] Among the current processing methods for vanadium-titanium magnetite, the non-blast furnace method can realize all-vanadium-titanium ore smelting, ...

Claims

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Application Information

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IPC IPC(8): C22B1/00C22B34/12C22B34/22C22B7/04C01G23/047
CPCC01G23/047C22B1/00C22B7/006C22B7/04C22B34/1218C22B34/22Y02P10/20
Inventor 郭宇峰郑富强王帅陈凤杨凌志邱冠周姜涛
Owner CENT SOUTH UNIV
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