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Method for preventing vanadium extraction converter dry dedusting system from vented explosion

A converter dry dust removal and dry dust removal technology, applied in the manufacture of converters, etc., can solve the problems of gas explosion venting, undisclosed, vanadium extraction converter dry dust removal system explosion venting, etc., to prolong the service life and save production time Effect

Active Publication Date: 2014-08-06
PANGANG GROUP RESEARCH INSTITUTE CO LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these patent application publications all mainly focus on the use method of dry dust removal system or how to prevent gas explosion venting (CO, H 2 ), how to prevent the venting of the vanadium extraction converter dry dedusting system is not disclosed

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0026] A company’s 200t vanadium extraction converter adopts a dry dedusting system (DDS) to process flue gas (including CO, extremely small dust particles and some metal iron powder), and explosion venting often occurs during use. Use the following method: before mixing iron, confirm the situation in the furnace, start mixing iron when there is no powdery material in the furnace, and at the same time control the speed of the dry dust removal fan to 550rpm; control the iron mixing speed at 90t / min; put the gun after mixing iron Lighting, using low lance position operation, the oxygen lance lance position is controlled between 1.6 ~ 1.8m; 60% of the total coolant consumption (by weight percentage) is added during vanadium extraction and blowing for 45 seconds; when vanadium extraction and blowing for 3 minutes, Add the remaining coolant; when the volume concentration of CO in the flue gas rises to 23%, stop blowing oxygen and raise the gun. After testing, the vanadium extractio...

example 2

[0028] A company’s 200t vanadium extraction converter adopts a dry dedusting system (DDS) to process flue gas (including CO, extremely small dust particles and some metal iron powder), and explosion venting often occurs during use. Use the following method: before mixing iron, confirm the situation in the furnace, start mixing iron when there is no powdery material in the furnace, and at the same time control the speed of the dry dust removal fan to 600rpm; control the iron mixing speed at 50-55t / min; Then lower the lance and fire, adopt low lance position operation, and control the oxygen lance lance position between 1.5-1.6m; add 70% of the total coolant amount (by weight percentage) when vanadium extraction blowing 30s; vanadium extraction blowing At 2 minutes, add the remaining coolant; when the volume concentration of CO in the flue gas rises to 23%, stop blowing oxygen and raise the gun. After testing, the vanadium extraction converter dry dust removal system in this exa...

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Abstract

The invention provides a method for preventing a vanadium extraction converter dry dedusting system from vented explosion. The method comprises the following steps: controlling the molten iron blending rate within 50-90t / min when blending molten iron into a vanadium extraction converter; after the water blending process is completed, controlling the position of an oxygen lance at 1.5-1.8m for striking the fire, and controlling the rotational speed of a fan of the dry dedusting system within 600-1000rpm; adding the first batch of cooling agent after vanadium extraction blasting for 30-60s, with the amount of the cooling agent accounting for 50%-70% of total use amount of the cooling agent; adding the second batch of the cooling agent after vanadium extraction converting for 1.1-3min; monitoring the volume concentration of CO in smoke in real time; and stopping oxygen blast and taking the lance when the volume concentration of CO reaches to 23%. The method can prevent the vanadium extraction converter dry dedusting system from vented explosion in a long time (such as not less than five months), can protect the electrostatic precipitation equipment, saves the production time, and prolongs the service life of the dry dedusting system.

Description

technical field [0001] The invention relates to the technical field of dry dedusting of a vanadium extraction converter, and more specifically relates to a method capable of preventing explosion venting of a dry dedusting system of a vanadium extraction converter. Background technique [0002] Most of the existing converter gas purification and recovery systems in my country use the traditional wet dedusting technology (OG method). The energy consumption is relatively large, and the energy consumption per ton of steel in the converter steelmaking process is 23.6kg of standard coal. In the early 1960s, the dry dedusting method of the converter developed jointly by the German Lurgi Company and the German Thyssen Steel Works, referred to as the LT method, began to be popularized and applied in the early 1980s; the basic principle of the converter dry dedusting technology is to After passing through the vaporization cooling flue, the high-temperature flue gas is sprayed with wat...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C21C5/38C21C5/30
Inventor 陈炼陈永王建戈文荪曾建华李龙蒋龙奎何为朱鹏
Owner PANGANG GROUP RESEARCH INSTITUTE CO LTD
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