Converter heat replacement hearth bottom circular seam packing method
A filling method and annular seam technology, applied in the direction of manufacturing converters, etc., can solve the problems of incompact filling of annular seams and high accident rate of leakage of molten steel, and achieve the effects of reducing thermal shutdown, weakening erosion rate and reducing consumption.
Inactive Publication Date: 2006-06-21
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 molten steel leakage higher
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[0031] 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.
[0032] 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.
[0033] 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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A method for filling annular gaps in the bottom of a converter heat replacement furnace, which includes the following steps in sequence: first heating the furnace lining in the converter to 600°C-1000°C with a coal-oxygen lance burning gas and oxygen, and removing the old furnace bottom; The second step is to spread the powdery annular joint material on the newly built furnace bottom; then after the furnace bottom is installed on the converter, remove the coal-oxygen lance, and use the top gun blowing nitrogen to remove the powdery ring material on the furnace bottom. Blow and fill the annular seam material into the annular seam, pull out the top lance, then put the coal oxygen gun into the converter, use the coal oxygen gun to bake and sinter the annular seam material; finally put a certain amount of powdery annular seam material into the trough Inside, heat to 200°C-350°C to melt it into a paste, pour it into the furnace, shake the converter back and forth to make the paste-like annular seam material flow into the annular seam and heat it to solidify. The method for filling the ring seam at the bottom of the converter heat replacement furnace of the invention improves the density of the ring seam and eliminates the accident of molten steel leakage caused by the ring seam being not dense.
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 ring seam of the converter bottom 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 material trough, preheat it into a paste and pour it into the converter at one time, tilt the converter back and forth at 40° and shake it back and forth twice. Second, fill the ring seam by the flow of paste material. 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...
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IPC IPC(8): C21C5/48
Inventor 张增武李建民郝建峰
Owner SHANXI TAIGANG STAINLESS STEEL CO LTD