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Converter vanadium extraction process of high silicon vanadium-containing molten iron

A process and molten iron technology, applied in the manufacture of converters and other directions, can solve the problems of high vanadium content and high vanadium slag grade

Active Publication Date: 2014-09-24
PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there is no high-silicon vanadium-containing molten iron converter vanadium extraction process that can obtain high-grade vanadium slag (that is, high vanadium content), high semi-steel C content, and temperature that can meet the needs of subsequent steelmaking.

Method used

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  • Converter vanadium extraction process of high silicon vanadium-containing molten iron

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Load 140t of high-silicon vanadium-containing molten iron into the vanadium-extracting converter, and the high-silicon vanadium-containing molten iron into the furnace contains 4.55% by weight of C, 0.3% by weight of Si, 0.29% by weight of Mn, 0.26% by weight of Ti, and 0.25% by weight of V, 0.064% by weight of P, 0.005% by weight of S, and the balance being Fe. The temperature of the high-silicon vanadium-containing molten iron entering the furnace is 1280°C. Oxygen is blown into the converter through the oxygen lance (the position of the control lance is 1.7m) for blowing, the total amount of oxygen blowing is 9.6m 3 / t of high-silicon vanadium-containing molten iron, the temperature at the end of blowing is controlled at 1410°C (the blowing time is 5 minutes). When blowing 1min, add coolant (containing 40% by weight of Fe 2 o 3 , 50 wt% FeO, 10 wt% SiO 2 ), the addition amount is 35.7kg / t high-silicon vanadium-containing molten iron. C content and V content in s...

Embodiment 2

[0020] Load 140t of high-silicon vanadium-containing molten iron into the vanadium-extracting converter, and the high-silicon vanadium-containing molten iron into the furnace contains 4.45% by weight of C, 0.2% by weight of Si, 0.26% by weight of Mn, 0.27% by weight of Ti, and 0.28% by weight of V, 0.068% by weight of P, 0.006% by weight of S, and the rest being Fe. The temperature of the high-silicon vanadium-containing molten iron entering the furnace is 1270°C. Oxygen is blown into the converter through the oxygen lance (the control lance position is 1.75m) for blowing, the total amount of oxygen blowing is 8.6m 3 / t of high-silicon vanadium-containing molten iron, the temperature at the end of blowing is controlled at 1390°C (the blowing time is 4.5min). When blowing 1min, add coolant (containing 45% by weight of Fe 2 o 3 , 40 wt% FeO, 15 wt% SiO 2 ), the addition amount is 32.1kg / t high-silicon vanadium-containing molten iron. C content and V content in semi-steel ob...

Embodiment 3

[0022] Load 140t of high-silicon vanadium-containing molten iron into the vanadium-extracting converter, and the high-silicon vanadium-containing molten iron into the furnace contains 4.45% by weight of C, 0.25% by weight of Si, 0.30% by weight of Mn, 0.28% by weight of Ti, and 0.29% by weight of V, 0.069% by weight of P, 0.005% by weight of S, and the rest being Fe. The temperature of the high-silicon vanadium-containing molten iron entering the furnace is 1275°C. Oxygen is blown into the converter through the oxygen lance (the control lance position is 1.65m) for blowing, the total amount of oxygen blowing is 9.1m 3 / t of high-silicon vanadium-containing molten iron, the temperature at the end of blowing is controlled at 1400°C (the blowing time is 4.8min). When blowing 1min, add coolant (containing 40% by weight of Fe 2 o 3 , 40 wt% FeO, 20 wt% SiO 2 ), the addition amount is 33.9kg / t high-silicon vanadium-containing molten iron. C content and V content in semi-steel o...

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Abstract

The invention discloses a converter vanadium extraction process of high silicon vanadium-containing molten iron, and the converter vanadium extraction process is as follows: blowing the high silicon vanadium-containing molten iron in a converter, and adding a coolant in the blowing process; the blowing end point temperature is controlled to be 1380 to 1420 DEG C; the coolant use amount is 30-37kg / t high silicon vanadium-containing molten iron; the gun height of the blowing process is controlled to be 1.5-2m. Through the technical proposal, the obtained vanadium slag is high in grade, namely high in vanadium content and low in TFe content, semi steel obtained by the converter vanadium extraction process is high in C content (in the range of 3.7-4.1 weight%), the goal of ''removing vanadium and holding carbon'' can be better realized, the semi steel temperature can meet the follow-up steelmaking demand.

Description

technical field [0001] The invention belongs to the technical field of vanadium extraction in a converter, and relates to a method for extracting vanadium in a converter with high-silicon vanadium-containing molten iron. Background technique [0002] Vanadium is a precious metal with a wide range of applications and high economic value. It is an extremely important industrial raw material and can be widely used in the fields of steel, chemical industry, aerospace, electronics, biology and agriculture. Vanadium is widely distributed in nature, accounting for about 0.02% of the mass of the earth's crust; but its distribution is extremely scattered, and it often coexists with other metal ores. Therefore, when mining and processing these ores, vanadium is recovered as a symbiotic product or by-product. Vanadium-titanium magnetite is the main mineral resource of vanadium. Vanadium, iron and titanium are symbiotic. Generally, it is smelted into molten iron, and then oxidized and b...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21C1/04C21C5/30C21C5/36C22B34/22
Inventor 陈永梁新腾曾建华李扬洲杨森祥戈文荪陈炼龚洪君喻林
Owner PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP
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