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Replacing method of converter tap hole

A replacement method and tapping technology, applied in the direction of manufacturing converters, etc., can solve the problems of long time, poor replacement effect, and reduced success rate of slag blocking.

Inactive Publication Date: 2014-02-26
张家港联峰钢铁研究所有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It takes a long time to adopt this kind of replacement method, and after a period of use, the furnace sand filled around the tapping hole is easy to fall off, resulting in uneven inner opening of the tapping hole, which reduces the success rate of slag blocking, and the replacement effect of furnace conditions becomes worse. Port life is low

Method used

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  • Replacing method of converter tap hole

Examples

Experimental program
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Effect test

Embodiment

[0011] The materials in this example are all commercially available.

[0012] This embodiment is carried out according to the following steps: Step 1, put the whole set of bricks 1 into the channel 2 of the seat brick, and adjust the angle and position;

[0013] Step 2: Fix the overall set of bricks 1 on the furnace body of the converter by welding steel bars, use the gunning machine 4 to spray the tap hole grouting material 3 to the gap between the seat brick and the overall set of bricks, and use the waste heat in the converter to seal the The tapping hole grouting material can be sintered. Tap hole grouting material contains MgO, Cr 2 o 3 magnesium refractory castables.

[0014] The magnesia refractory castable used in this example mainly consists of MgO, Cr 2 o 3 Wait. The sintering strength is higher than that of Martin sand and furnace sand, and the fluidity of the grouting material is better. It can fill and fill the gaps around it. The waste heat in the converter...

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Abstract

The invention relates to a replacing method of a converter tap hole and belongs to the technical field of steel smelting. The replacing method of the converter tap hole provided by the invention comprises the following steps: 1, placing a whole set of brick in a brick cup channel and adjusting the angle and position; and 2, fixing the whole set of brick on the converter body, filling the gap between the brick cup and whole set of brick with a tapping hole grouting material and sintering the tapping hole grouting material by the waste heat in the converter. The invention has the following beneficial effects of the replace time shortened by about 10 minutes compared with an existing method, the service life of the tapping hole prolonged by about 250 furnace compared with the existing method, the success rate for pushing off the slag improved by 10% compared with the existing method and the cost on per ton of steel reduced by about 0.15 yuan, so as to achieve the purposes of shortening replace time for converter tapping hole, prolonging the service life of tapping hole, improving slag pushing-off rate, reducing production mistake, improving product quality and reducing production cost.

Description

technical field [0001] The invention relates to a method for replacing a tap hole of a converter, belonging to the technical field of iron and steel smelting. Background technique [0002] The main method of replacing the original tap hole of the converter is to put the new tap hole bricks in the right position first, and after welding and fixing them, fill the surrounding gaps with Martin sand to keep the furnace body still. After the Martin sand is sintered for 3-5 minutes, replace the converter Shake to a suitable position, fill the furnace sand around the taphole brick at the back of the furnace, beat the surrounding area with a slag rod to form a bowl-shaped pit, and use an oxygen blowing tube to sinter with oxygen for more than 20 minutes. It takes a long time to adopt this kind of replacement method, and after a period of use, the furnace sand filled around the tapping hole is easy to fall off, resulting in uneven inner opening of the tapping hole, which reduces the s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21C5/46
Inventor 柴建铭李春丰郑凯杨彬徐震徐骏富
Owner 张家港联峰钢铁研究所有限公司
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