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Low-cost slag splashing protection method of vanadium extraction converter

A low-cost technology for slag splashing to protect the furnace, applied in the manufacture of converters, etc., can solve problems such as slag splashing and protection of the converter not involved in vanadium extraction, achieve the effect of improving the effect of slag hanging, increasing the life of the lining, and solving the effect of serious erosion

Active Publication Date: 2013-02-06
PANGANG GROUP RESEARCH INSTITUTE CO LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] However, the methods disclosed in the above documents are all aimed at the steelmaking converter, and do not involve the slag splashing of the vanadium extracting converter

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0031] After vanadium extraction and blowing are completed, 1 ton of vanadium slag is left in the furnace, and 200kg / (ton of vanadium slag) of waste magnesia-carbon brick particles is added, and the flow rate of bottom blowing nitrogen gas is adjusted to 500Nm 3 / h, adjust the oxygen pressure of the oxygen lance to 0.4MPa, lower the gun to blow oxygen, control the position of the gun at 800mm, and blow oxygen for 3 minutes, lift the oxygen gun after the vanadium slag melts, switch the gas to nitrogen, and lower the gun again for slag splashing For operation, the gun position is controlled to 500mm, the nitrogen pressure is controlled at 1MPa, and the slag splashing time is 3min. Wherein, the waste magnesia-carbon brick particles are composed of 60% magnesia and 40% carbon by weight percentage.

example 2

[0033] After vanadium extraction blowing is completed, 5t of vanadium slag is left in the furnace, and 170kg / (ton of vanadium slag) of waste magnesia-carbon brick particles is added, and the flow rate of bottom blowing nitrogen gas is adjusted to 400Nm 3 / h, adjust the oxygen pressure of the oxygen lance to 0.8MPa, lower the gun to blow oxygen, control the position of the gun at 1000mm, and blow oxygen for 2 minutes, lift the oxygen gun after the vanadium slag melts, switch the gas to nitrogen, and lower the gun again for slag splashing For operation, the gun position is controlled to 300mm, the nitrogen pressure is controlled at 1MPa, and the slag splashing time is 3min. Wherein, the waste magnesia-carbon brick particles are composed of 90% magnesia and 10% carbon by weight percentage.

example 3

[0035] After vanadium extraction and blowing are completed, 3 tons of vanadium slag are left in the furnace, and 100 kg / (ton of vanadium slag) of waste magnesia-carbon brick particles are added, and the flow rate of bottom blowing nitrogen gas is adjusted to 400Nm at the same time 3 / h, adjust the oxygen pressure of the oxygen lance to 0.6MPa, lower the gun for oxygen blowing, control the position of the gun at 800mm, and blow oxygen for 1min. After the vanadium slag melts, raise the oxygen gun, switch the gas to nitrogen, and lower the gun again for slag splashing For operation, the gun position is controlled to 500mm, the nitrogen pressure is controlled at 1.2MPa, and the slag splashing time is 2min. Wherein, the waste magnesia-carbon brick particles are composed of 80% magnesia and 20% carbon by weight percentage.

[0036] The low-cost slag-splashing protection method for the vanadium extraction converter of the present invention can effectively improve the melting point an...

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Abstract

The invention provides a low-cost slag splashing protection method of a vanadium extraction converter. The slag splashing protection method comprises the following steps of: reserving a certain quantity of vanadium slag in the converter after vanadium extraction blowing is finished and semi-steel is tapped; adding 100-200 kg of slag regulating agent into one ton of vanadium slag, and blowing oxygen to melt the vanadium slag via an oxygen gun; and blowing nitrogen for slag splashing protection via the oxygen gun, wherein the slag regulating agent is waste magnesia carbon brick particles. With the slag splashing protection method, the problems of low melting point and difficult adhesion of vanadium slag can be effectively solved, the slag adhering effect can be improved during slag splashing protection, the erosion resistibility of a converter lining is increased, and the service life of the vanadium extraction converter lining is effectively prolonged.

Description

technical field [0001] The invention relates to the technical field of furnace protection by slag splashing of a vanadium extraction converter, in particular to a low-cost method for protection of a vanadium extraction converter by slag splashing. Background technique [0002] The converter is the main equipment produced by iron and steel enterprises, and its life is directly related to the production cost of the converter. In order to improve the service life of the converter, in the mid-1990s, LTV Corporation of the United States first developed and adopted the slag splashing protection technology, which greatly increased the service life of the converter, from 6200 furnaces in 1990 to 15658 furnaces in 1995. After adopting the technology of slag splashing to protect the furnace, the consumption of converter refractories is reduced by about 25% to 50%. The furnace life of Japanese converters is not high, generally between 6000 and 8000 furnaces. Under the condition of pr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21C5/28C21C5/36
Inventor 陈炼陈永戈文荪曾建华王建蒋龙奎卓钧王二军黄正华董克平
Owner PANGANG GROUP RESEARCH INSTITUTE CO LTD
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