Converter heat replacement hearth bottom circular seam packing method

A filling method and a technology for annular seams, which are applied in the manufacture of converters, etc., can solve the problems of non-dense filling of annular seams and high accident rate of steel leakage, and achieve the effects of reducing thermal shutdown, weakening erosion rate, and synchronizing life

Inactive Publication Date: 2005-04-27
SHANXI TAIGANG STAINLESS STEEL CO LTD
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Problems solved by technology

Since the annular seam of the furnace bottom is wide at the top and narrow at the bottom, after hot filling with the existing annular seam filling method, the filling material is easy to "bridge" in the annular seam to form many small holes, resulting in the filling of the annular seam is not dense, and the accident rate of steel leakage is high

Method used

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  • Converter heat replacement hearth bottom circular seam packing method
  • Converter heat replacement hearth bottom circular seam packing method
  • Converter heat replacement hearth bottom circular seam packing method

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Embodiment Construction

[0038] The method for filling the annular gap at the bottom of the converter heat replacement furnace of the present invention will be described in detail below in conjunction with the embodiments and accompanying drawings, but the method for filling the annular gap at the bottom of the converter heat replacement furnace of the present invention is not limited to the following embodiments.

[0039] In this embodiment of the method for filling the ring seam of the bottom of the converter heat exchange furnace, two fillings are implemented in four steps.

[0040] The first step of insulation: see figure 1 and figure 2 Before the heat replacement of the furnace bottom, first extend the special coal-oxygen lance 9 for burning gas and oxygen into the converter 15 to heat the furnace lining, mainly the furnace body working layer 13 and the hearth working layer 5, to 800°C, and simultaneously heat the working layer The old hearth, eroded to the limits of the craft, was removed.

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Abstract

The hot converter bottom replacing and ring seam filling process includes the following steps: heating the converter lining with burning gun burning gas and oxygen to 600-1000 deg.c and taking down the old converter bottom; spreading the newly laid converter bottom with ring seam powder, installing the newly laid converter bottom, blowing with nitrogen blowing gun the powder into the seam and roasting and sintering the ring seam powder with the burning gun; heating certain amount of ring seam powder in a barrel to 200-350 deg.c to make it melt and become paste poured into the converter; oscillating the converter for the paste to flow into ring seam and heating to cure. The said process has raised tightness or the ring seam and can avoid accident of leaking molten steel.

Description

technical field [0001] The invention relates to a method for filling annular seams in the bottom of a converter heat replacement furnace. Background technique [0002] In order to increase the service life of the converter, the furnace bottom needs to be replaced after reaching a certain service life, and the furnace bottom ring seam of the converter should be filled after the replacement. The method of filling the ring seam at the bottom of the converter heat replacement furnace is to put all the paste ring seam filling material outside the converter into the trough to preheat it into a paste once and pour it into the converter at one time, tilt the converter back and forth at 40° and shake it back and forth twice. Fill the annular gap by flow. Since the annular seam of the furnace bottom is wide at the top and narrow at the bottom, after hot filling with the existing annular seam filling method, the filling material is easy to "bridge" in the annular seam to form many sma...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21C5/48
Inventor 张增武李建民郝建峰
Owner SHANXI TAIGANG STAINLESS STEEL CO LTD
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