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Technology for processing vanadium extraction semi-steel

A processing technology and a vanadium slag technology, applied in the field of vanadium extraction semi-steel processing technology, can solve the problems of increasing production and maintenance costs of enterprises, increasing the difficulty of maintaining furnace conditions, and decreasing the operation rate of converters, so as to improve the operation rate of converters and reduce the consumption of lime. , the effect is improved

Inactive Publication Date: 2019-01-04
YUNNAN DESHENG STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In view of the existing iron and steel smelting by double slag vanadium extraction, the output of double slag vanadium slag after smelting is low and the quality is poor. Since the double slag vanadium extraction cannot remove all the high vanadium and titanium slag, resulting in too thin final slag, The effect of slag splashing to protect the furnace is poor, the difficulty of furnace maintenance is increased, the number of furnace repairs is increased, and the operating rate of the converter is reduced, thereby reducing production efficiency and increasing the production and maintenance costs of the enterprise. The purpose of the present invention is to provide a vanadium extraction semi-steel processing process, to solve the problems raised in the above-mentioned background technology

Method used

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  • Technology for processing vanadium extraction semi-steel
  • Technology for processing vanadium extraction semi-steel
  • Technology for processing vanadium extraction semi-steel

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Effect test

Embodiment 1

[0027] In an embodiment of the present invention, a vanadium extraction semi-steel processing technology includes the following process flow:

[0028] (1) Feed pig iron; (2) Add iron; (3) blowing; (4) add coolant; (5) end blowing;

[0029] Further, the following steps are included:

[0030] (1) Import pig iron: carry out desulfurization and slag removal of pig iron, and the work of removing slag from molten iron needs to be strengthened. The slag removal rate of molten iron in the mixed iron furnace is 100%. It is strictly forbidden to bring sediment into the pig iron into the furnace. After desulfurization and slag removal, molten pig iron is obtained;

[0031] (2) Add iron: mix the obtained molten pig iron into the converter, the charging amount is based on molten iron: 29.2 tons, pig iron: 1.09 tons, and the temperature of the molten iron into the furnace is set at 1225 degrees, in order to facilitate the control of the temperature process of the converter to extract vanadi...

Embodiment 2

[0045] In an embodiment of the present invention, a vanadium extraction semi-steel processing technology includes the following process flow:

[0046] (2) Feed pig iron; (2) Mix iron; (3) blowing; (4) add coolant; (5) end blowing;

[0047] Further, the following steps are included:

[0048] (1) Import pig iron: carry out desulfurization and slag removal of pig iron, and the work of removing slag from molten iron needs to be strengthened. The slag removal rate of molten iron in the mixed iron furnace is 100%. It is strictly forbidden to bring sediment into the pig iron into the furnace. After desulfurization and slag removal, molten pig iron is obtained;

[0049] (2) Add iron: mix the obtained molten pig iron into the converter, the charging amount is based on molten iron: 29.8 tons, pig iron: 1.47 tons, and the temperature of molten iron entering the furnace is set at 1245 degrees to facilitate the process control of the temperature process of vanadium extraction in the conver...

Embodiment 4

[0080] In an embodiment of the present invention, a vanadium extraction semi-steel processing technology includes the following process flow:

[0081] (4) Feed pig iron; (2) Mix iron; (3) blowing; (4) add coolant; (5) end blowing;

[0082] Further, the following steps are included:

[0083] (1) Import pig iron: carry out desulfurization and slag removal of pig iron, and the work of removing slag from molten iron needs to be strengthened. The slag removal rate of molten iron in the mixed iron furnace is 100%. It is strictly forbidden to bring sediment into the pig iron into the furnace. After desulfurization and slag removal, molten pig iron is obtained;

[0084] (2) Add iron: mix the obtained molten pig iron into the converter, the loading amount is based on molten iron: 29.3 tons, pig iron: 1.37 tons, and the temperature of the molten iron into the furnace is set at 1240 degrees, in order to facilitate the control of the temperature process of the converter to extract vanadiu...

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Abstract

The invention discloses a technology for processing vanadium extraction semi-steel. The technology includes technological processes of (1), feeding pig iron; (2), carrying out iron charging; (3), carrying out blowing; (4), adding coolants; (5), terminating blowing. Molten pig iron added during production according to the technology comprises chemical components including, by weight, 4%-5% of C, 0.08%-0.3% of Si, 0.2%-0.5% of Mn, 0.25%-0.3% of V, less then or equal to 0.25% of P, less than or equal to 0.07% of S and 93.58%-95.47% of Fe. The technology has the advantages that the original double-slag vanadium extraction smelting is replaced with semi-steel vanadium extraction, the yield of double-slag vanadium slag is approximately 30 Kg / t steel, the comprehensive grade is higher than 13%, and good benefits can be created for companies; slag splashing effects of semi-steel smelting converters can be obviously improved after semi-steel vanadium extraction is adopted, the fettling frequencies can be lowered, the operation rate of the converters can be increased, accordingly, the production efficiency can be improved, and the enterprise benefits can be increased.

Description

technical field [0001] The invention relates to the technical field of steelmaking, in particular to a vanadium-extracting semi-steel processing technology. Background technique [0002] Originally, double slag vanadium was used for smelting in the steelmaking and steel processing plants. The output of double slag vanadium slag was low and the quality was poor. V in double slag vanadium slag 2 o 5 The content of CaO is low, the grade is between 7% and 8%, and the output can only reach about 7Kg / t steel, and the CaO content is high, about 30% on average. Furthermore, when the double slag extracts vanadium, it is impossible to remove all the slag with high vanadium and titanium. , causing the final slag to be too thin, the effect of slag splashing to protect the furnace is poor, the difficulty of furnace maintenance is increased, the number of furnace repairs is increased, and the operation rate of the converter is reduced, thereby reducing production efficiency and increasin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21C1/02C21C5/30C21C5/36C21C7/00C22C33/08C22C37/10
CPCC21C1/02C21C5/30C21C5/36C21C7/0025C22C33/08C22C37/10
Inventor 刘德斌张华陈劲松李福林邹建军李华国陈贵富
Owner YUNNAN DESHENG STEEL CO LTD
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