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Method for preventing dry dedusting system of semi-steel steel converter from explosion venting

A technology of dry dust removal and steelmaking converter, which is applied in the manufacture of converters and the improvement of process efficiency. It can solve the problems of undisclosed, gas explosion venting, etc., so as to prolong the service life, reduce the number of explosion venting, and save production time. Effect

Active Publication Date: 2014-07-09
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 mainly focus on the use method of dry dust removal system or how to prevent gas explosion (CO, H 2 ), how to prevent the dust explosion venting in the dry dust removal system of the semi-steel steelmaking converter is not disclosed

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0030] For the 200t semi-steel steelmaking converter in the above Comparative Example 1, the following methods were used for flue gas treatment and recovery. Specifically: control the amount of slag remaining at 400kg / furnace; add iron after the remaining slag in the furnace is dry, and reduce the fan speed to 400rpm at the same time; After the fire is turned on, the feeding operation is carried out. It is forbidden to add the carburizer when the gun is lowered; after the gun is blown, wait for the O 2 After %≤5%, add the first batch of slagging materials with a weight of 500kg. After adding the first batch of slagging materials, add slagging materials in multiple batches, the amount of which is 1000kg, 900kg, 850kg, 1000kg, 700kg, 900kg, 1000kg, 800kg respectively. The slagging material and molten steel of this example are basically the same as those of Comparative Example 1. After adopting the method in this example, the number of dust explosion vents is reduced to 0.5 tim...

example 2

[0034] For the 200t semi-steel steelmaking converter in the above comparative example 2, the following methods were used for flue gas treatment and recovery. Specifically: control the amount of slag remaining at 800kg / furnace; add iron after the remaining slag in the furnace is dry, and reduce the fan speed to 500rpm at the same time; After the fire is turned on, the feeding operation is carried out. It is forbidden to add the carburizer when the gun is lowered; after the gun is blown, wait for the O 2After %≤5%, add the first batch of slagging materials with a weight of 500kg. After adding the first batch of slagging materials, add the slagging materials in batches, and the addition amounts are 900kg, 1000kg, 950kg, 900kg, 800kg, 1000kg, 950kg, 800kg respectively. The slagging material and molten steel of this example are basically the same as those of Comparative Example 2. After adopting the method of this example, the number of dust explosion vents is reduced to 0.4 time...

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Abstract

The invention provides a method for preventing a dry dedusting system of a semi-steel steel converter from explosion venting. The method for preventing the dry dedusting system of the semi-steel steel converter from explosion venting comprises three steps, wherein a first step is that the quantity of residue slag is controlled to be 2 * 10 <-3> to 4 * 10 <-3> times of the furnace volume of the steel converter, a second step is that after the slag in the steel converter is wrapped and dry, molten iron is blended into the slag, and at the same time, the rotating speed of a fan is controlled to be 300-500 revolutions per minute, a third step is that a gun is moved downwards for ignition, no carburant is added when the gun is moved downwards, after the start of converting, the volume content of oxygen in flue gas is detected, and after the volume content of the oxygen is not higher than 5%, slagging materials are added into the steel converter. By means of the method for preventing the dry dedusting system of the semi-steel steel converter from explosion venting, times of explosion venting of the dry dedusting system of the semi-steel steel converter can be reduced, and therefore an electrostatic dust removal device can be protected, the service life of a dry dedusting device can be prolonged, and production time can be saved.

Description

technical field [0001] The invention relates to the technical field of dry dedusting of semi-steel steelmaking converters, and more specifically relates to a method capable of preventing explosion venting of the dry dedusting system of semi-steel steelmaking converters. Background technique [0002] The existing converter gas purification and recovery system in my country mostly adopts the traditional wet dedusting technology (OG method), the automation control level and gas recovery are low, and the dust content of the purified gas still reaches 100mg / m 3 , The recovery system consumes a lot of energy, 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 dr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C21C5/40
CPCY02P10/20
Inventor 陈炼陈永王建戈文荪曾建华李龙蒋龙奎喻林杨晓东
Owner PANGANG GROUP RESEARCH INSTITUTE CO LTD
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