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Material distribution method for blast furnace opening

A blast furnace and cloth technology, applied in blast furnaces, blast furnace details, furnaces, etc., can solve the problems of slag and iron not being discharged smoothly, poor furnace opening, and high slag material.

Inactive Publication Date: 2020-04-21
SHOUGANG CORPORATION +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the problems existing in the prior art, the embodiment of the present invention provides a method for distributing materials for blast furnace start-up, which is used to solve the problem of high slag material and poor formation of the reflow zone in the furnace when the blast furnace is started-up in the prior art , the slag and iron cannot be discharged smoothly, resulting in poor furnace start-up and a technical problem that affects work efficiency

Method used

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  • Material distribution method for blast furnace opening
  • Material distribution method for blast furnace opening

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Embodiment 1

[0028] This embodiment provides a method for distributing materials for blast furnace opening, which is applied in a blast furnace. In order to better understand the technical solution of this application, refer to figure 1 , the blast furnace includes from bottom to top: furnace bottom 1, furnace hearth 2, furnace bosh 3, furnace waist 4, furnace body 5 and furnace throat 6; the center line of blast furnace tuyere is located on the upper edge of furnace hearth 2, as figure 2 As shown, the method includes:

[0029] S110, loading n1 batches of clean coke at the bottom of the furnace, the thickness of the n1 batches of clean coke being 0.3-0.5m;

[0030] Load n1 batches of clean coke into the bottom of the furnace, the thickness of the n1 batches of clean coke is 0.3-0.5m; the function of the clean coke here is to protect the bottom coke, mainly for protecting the castable at the bottom of the furnace. The value of n1 can be determined according to the actual situation.

[00...

Embodiment 2

[0055] In practical application, for 5500m 3 When the blast furnace is opened and the material is distributed, the specific implementation is as follows:

[0056] The first layer: 2 batches of clean coke are loaded into the bottom of the furnace with a thickness of 0.49m.

[0057] The second layer: From the upper end of the first layer of clean coke to the position 1m below the center line of the tuyere in the furnace hearth, n2 batches of carbon-containing charge are loaded, and the charge amount of carbon-containing charge is 20% of the effective volume of the blast furnace. In this embodiment, the carbon-containing charge is hard miscellaneous wood.

[0058] The third layer: 28 batches of clean coke are loaded along the upper end surface of the carbon-containing charge of the second layer, and the charging amount of the 28 batches of clean coke is 30.2% of the effective volume of the blast furnace;

[0059] The fourth layer: 18 batches of empty coke are loaded along the u...

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Abstract

The embodiment of the invention provides a material distribution method for blast furnace opening. The method comprises the following steps: charging n1 batches of clean coke at the bottom of a furnace, wherein the thickness of the n1 batches of clean coke is 0.3-0.5m; loading n2 batches of carbon-containing furnace burden at the position from the upper end face of the clean coke to 0.9-1m below the central line of a tuyere in a furnace cylinder; charging n3 batches of clean coke along the upper end face of the carbon-containing furnace charge; loading n4 batches of empty coke along the upperend face of the n3 batches of clean coke; loading n5 batches of normal materials along the upper end face of the n4 bathes of empty coke, wherein the normal materials comprise pallet ore and sinteredore, and the mass percentage of the pellet ore is more than 90%; charging n6 batches of empty coke along the upper end faces of the n5 batches of normal materials; charging n7 batches of normal materials along the upper end face of the n6 batches of empty coke, wherein the charging height of the n7 batches of normal materials is 9-12% of the height of the furnace body; charging n8 batches of emptycoke along the upper end faces of the n7 batches of normal materials; and loading n9 bathes of normal materials along the upper end face of the n8 batches of empty coke, wherein the slag content of the normal materials is 80-150 kg / t.

Description

technical field [0001] The invention relates to the technical field of blast furnace ironmaking, in particular to a method for distributing materials for blast furnace opening. Background technique [0002] Blast furnaces may be shut down, overhauled, medium repaired and relocated due to external factors during the production process. Therefore, it has become one of the focal issues in this field how to realize safe, efficient and environment-friendly start-up of a blast furnace after medium repair or overhaul or a newly built blast furnace. [0003] Blast furnace start-up is a process in which the entire furnace body transitions from a cold state to a hot state required for normal smelting. Among them, efficient heating of the hearth, formation of refractory belt and obtaining and smooth discharge of slag and iron with certain fluidity are the key points for the success of blast furnace start-up. In the prior art, the blast furnace is generally started by setting differen...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21B5/00
CPCC21B5/008C21B5/007
Inventor 陈辉甄昆泰任立军黄俊杰郭洪烈陈艳波沈海波王喆王伟刘文运武建龙
Owner SHOUGANG CORPORATION
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