A kind of reducing rutile tio in titanium slag 2 Titanium slag rapid cooling system and method

A rutile-type, rapid cooling technology, applied in the field of metallurgy, can solve problems such as large differences in acidolysis effects, unfavorable acidolysis of titanium slag, and changes in crystal structure, so as to ensure the acidolysis rate of titanium slag, protect titanium slag from oxidation, Improve the effect of application effect

Active Publication Date: 2022-07-05
PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP +1
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Problems solved by technology

[0002] At present, most of the domestic titanium dioxide production in China still adopts the method of mixing titanium concentrate and titanium slag. Users generally pay attention to the chemical indicators of raw materials, and there are few studies on the influence of raw material crystal structure on acid hydrolysis.
In addition, at present, there is less attention paid to the oxidation of titanium slag during the cooling process in China; different cooling methods lead to unstable quality of titanium slag, and large differences in subsequent acidolysis effects, which have a negative impact on the stability of titanium dioxide production process
Especially in the process of titanium slag coming out of the furnace, the hot slag is easily oxidized when it is exposed to the air atmosphere, resulting in the change of the crystal structure, and the rutile TiO in the titanium slag 2 High, traditional cooling process generally rutile TiO in titanium slag 2 The mass percentage content is generally 1% to 2%; while the rutile TiO 2 If the content is too high, it will not be conducive to the acidolysis of titanium slag, which will lead to a lower acidolysis rate of titanium slag

Method used

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  • A kind of reducing rutile tio in titanium slag <sub>2</sub> Titanium slag rapid cooling system and method
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  • A kind of reducing rutile tio in titanium slag <sub>2</sub> Titanium slag rapid cooling system and method

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Experimental program
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Effect test

Embodiment 1

[0049] Before adding the slag into the slag bucket 1, feed N 5 minutes in advance 2 Blowing is carried out to cool the empty slag bucket 1; the titanium slag is released at a temperature of 1657 ° C, and the slag bucket 1 is used to load it. When the titanium slag is loaded to 80% of the volume of the slag bucket, it is transferred to the next slag bucket station and is transferred to the corresponding slag bucket station. Bronchial 6 insufflation N 2 , the next slag bucket 1 is loaded in turn; the slag bucket 1 after the slag is loaded 2 The total blowing time is 2.5h, of which the air flow in the main gas pipe 5 is 3500L / min; then the surface temperature of the titanium slag after spraying is measured by an infrared temperature measuring gun to 978°C; After the initial cooling treatment, the titanium slag is transported to the conveying channel 9 of the water cooling section for water-cooling spray treatment; the total time for cooling the titanium slag is 5 hours, and the ...

Embodiment 2

[0051] Before adding the slag into the slag bucket 1, feed N 5 minutes in advance 2 Blowing is carried out to cool the empty slag bucket 1; the titanium slag is discharged at a temperature of 1668 ° C, and the slag bucket 1 is used to load it. When the titanium slag is loaded to 80% of the volume of the slag bucket, it is transferred to the next slag bucket station and is transferred to the corresponding slag bucket station. Bronchial 6 insufflation N 2 , the next slag bucket 1 is loaded in turn; the slag bucket 1 after the slag is loaded 2 The total blowing time is 3h, among which, the air flow in the main gas pipe 5 is 4000L / min; then the surface temperature of the titanium slag after blowing is measured by an infrared temperature measuring gun to 947°C; After the cooling treatment, the titanium slag is transported to the conveying channel 9 of the water cooling section for water-cooling spray treatment; the total time for cooling the titanium slag by water spray is 5.5 hou...

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Abstract

The invention discloses a method for reducing rutile TiO in titanium slag 2 The titanium slag rapid cooling system and method belong to the technical field of metallurgy, and can reduce the amount of rutile TiO in titanium slag. 2 content. The system includes a slag bucket conveying channel, an air-cooled section conveying channel is arranged from the inlet end to the outlet end of the slag bucket conveying channel, and one of the slag bucket stations located in the middle of the air-cooling section conveying channel is set as titanium slag. Feeding station; a main air pipe arranged along the direction of the slag bucket conveying channel in the conveying passage of the air-cooled section, and a plurality of bronchi are arranged at intervals along the direction of the main air pipe, so as to pass the air blowing port of each bronchi to the slag located under the corresponding bronchi. Inert gas is injected into the barrel for air cooling. In the invention, the treatment method of spraying inert gas during and after the titanium slag enters the slag bucket can realize preliminary air-cooling treatment and protect the oxidation of the titanium slag, and can effectively reduce the rutile type TiO in the discharged titanium slag. 2 The content of titanium slag can effectively improve the acid hydrolysis rate of titanium slag.

Description

technical field [0001] The invention relates to the technical field of metallurgy, in particular to a method for reducing rutile-type TiO in titanium slag 2 Titanium slag rapid cooling system and method. Background technique [0002] At present, the production of titanium dioxide in China still mostly adopts the method of mixing titanium concentrate and titanium slag. Users generally pay attention to the chemical indicators of the raw materials, and there are few studies on the influence of the crystal structure of the raw materials on acid hydrolysis. In addition, at present, less attention is paid to the oxidation problem during the cooling process of titanium slag in China; different cooling methods lead to unstable quality of titanium slag, and the effect of subsequent acid hydrolysis is quite different, which has a negative impact on the stability of titanium dioxide production process. In particular, the hot slag is exposed to the air atmosphere during the release of ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01G23/053C04B5/06C04B5/00F25D31/00
CPCC01G23/0532C04B5/06C04B5/00F25D31/00Y02P10/20
Inventor 刘娟黄家旭肖军李凯茂
Owner PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP
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