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converter bottom blowing co 2 The method of extracting vanadium

A converter bottom blowing, CO2 technology, applied in the field of vanadium metallurgy, can solve the problems of incomplete melting, fast rhythm, insufficient kinetic conditions for the melting of bulk coolant, etc. Effect

Active Publication Date: 2022-08-05
PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] However, these block coolants cannot continuously control the temperature of the molten pool, and at the same time, the local molten pool is prone to rapid cooling. In addition, the process of vanadium extraction in the converter is fast, and the melting kinetic conditions of the block coolant are not sufficient, and the melting is not complete. Can not be used effectively, not conducive to vanadium extraction

Method used

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  • converter bottom blowing co <sub>2</sub> The method of extracting vanadium

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Experimental program
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Embodiment 1

[0027] The molten iron with a V content of 0.28-0.34% is mixed into the converter, and the temperature of the molten iron is controlled to be 1260-1320 ° C. The air-permeable bricks are distributed in the bottom zone I, II and III of the converter. The number of permeable bricks matches the furnace capacity, of which zone I The ventilation bricks in zone III are symmetrically distributed, the ventilation bricks in zone II are symmetrically distributed, and the included angle α in zone II is 80°. Blowing CO at the bottom of the converter 2 , CO is blown from the bottom of a single breathable brick in zone Ⅰ 2 Flow is 170Nm 3 / min, CO is blown from the bottom of a single breathable brick in the Ⅱ zone 2 Flow is 100Nm 3 / min, CO is blown from the bottom of a single breathable brick in zone III 2 Flow 170Nm 3 / min, after blowing for 4 minutes, use an oxygen lance to blow O 2 +CO 2 Mixed gas, CO 2 The volume content is 12%, and the oxygen supply intensity is 1.5~3.0Nm 3 / m...

Embodiment 2

[0029] The molten iron with a V content of 0.28-0.34% is mixed into the converter, and the temperature of the molten iron is controlled to be 1260-1320 ° C. The air-permeable bricks are distributed in the bottom zone I, II and III of the converter. The number of permeable bricks matches the furnace capacity, of which zone I The ventilation bricks in zone III are symmetrically distributed, the ventilation bricks in zone II are symmetrically distributed, and the included angle α of zone II is 100°. Blowing CO at the bottom of the converter2 , CO is blown from the bottom of a single breathable brick in zone Ⅰ 2 Flow is 200Nm 3 / min, CO is blown from the bottom of a single breathable brick in the Ⅱ zone 2 Flow is 130Nm 3 / min, CO is blown from the bottom of a single breathable brick in zone III 2 Flow 200Nm 3 / min, after blowing for 4 minutes, use an oxygen lance to blow O 2 +CO 2 Mixed gas, CO 2 The volume content is 25%, and the oxygen supply intensity is 1.5~3.0Nm 3 / mi...

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Abstract

The invention belongs to the metallurgical technical field of vanadium, and in particular relates to bottom blowing CO in a converter 2 The method of vanadium extraction. The technical problem to be solved by the present invention is to provide a converter bottom blowing CO 2 The method for extracting vanadium reduces the residual vanadium content. The bottom blowing CO of the converter provided by the present invention 2 The method for extracting vanadium comprises the following steps: mixing vanadium-containing molten iron into a converter, and blowing CO at the bottom of the converter 2 , using an oxygen lance to blow O 2 and CO 2 Add the coolant within 2 minutes of the oxygen lance opening and blowing, and blow to the end point. The present invention recovers the carbon dioxide gas discharged from iron and steel production, and is used for vanadium extraction in the converter, which can achieve the effect of energy saving and emission reduction; at the same time, the present invention adopts CO 2 Substitute part O 2 or N 2 Extracting vanadium in a converter can restrain the temperature rise of the molten pool, which is beneficial to extracting vanadium and protecting carbon, and can also effectively reduce the residual vanadium content.

Description

technical field [0001] The invention belongs to the metallurgical technical field of vanadium, and in particular relates to bottom blowing CO in a converter 2 The method of vanadium extraction. Background technique [0002] CO 2 is the main gas of the greenhouse effect, China's CO 2 Gas emissions are the largest, accounting for 25%. With global warming and environmental problems becoming more and more serious, reducing CO 2 Emissions are getting more and more attention. Steel industry CO 2 Gas emissions accounted for 6%, ranking fourth, putting the CO generated by steel companies 2 For recycling, used in steelmaking, can replace part of O 2 and Ar, creating economic benefits. [0003] In converter vanadium extraction process, O 2 Oxidation reaction with silicon, manganese, vanadium, titanium and some carbon elements generates a lot of heat, causing the temperature of the molten pool to quickly rise to above 1400 °C, exceeding the transition temperature of C-V oxidat...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C21C5/28C21C5/35C21C7/072C22B34/22
CPCC21C5/28C21C5/35C21C7/072C22B34/22Y02P10/20
Inventor 李龙吴国荣
Owner PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP
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