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Converter with replaceable converter bottom and converter bottom replacing method

A replacement method and technology for the bottom of a converter, applied in the direction of manufacturing converters, etc., can solve the problems of short life of the bottom of the converter, and achieve the effect of ensuring the degree of compaction

Active Publication Date: 2020-09-11
SHOUGANG CORPORATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In view of this, the purpose of the present invention is to overcome the deficiencies of the prior art. In the first aspect, a converter with a replaceable furnace bottom is provided to solve the technical problem of the short life of the converter furnace bottom

Method used

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  • Converter with replaceable converter bottom and converter bottom replacing method
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  • Converter with replaceable converter bottom and converter bottom replacing method

Examples

Experimental program
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Effect test

Embodiment 1

[0035] A converter with a replaceable bottom, such as figure 1 As shown, a furnace bottom shell 1 and a furnace body shell 2 are included. Both the bottom shell 1 and the shaft shell 2 are steel shells, and there is an overlapping area between the bottom of the shaft shell 2 and the bottom shell 1, and the bottom shell 1 and the shaft shell 2 are detachably connected by bolts in the overlapping area. Of course, buckles or pins can also be used to detachably connect the furnace bottom shell 1 to the furnace body shell 2 .

[0036] Such as figure 1 As shown, a permanent layer 9 is provided on the furnace bottom shell 1, and a furnace bottom refractory material 3 is built on the permanent layer 9, and a bottom tuyere is run through between the furnace bottom shell 1, the permanent layer 9 and the furnace bottom refractory material 3 11. It is used for bottom blowing process of molten steel in the converter. A ramming material 10 is arranged on the furnace body shell 2 , and a ...

Embodiment 2

[0045] The present invention also provides a method for replacing the furnace bottom of a converter, using the above-mentioned converter in which the furnace bottom shell 1 and the furnace body shell 2 are detachably connected, such as image 3 As shown, when the molten steel is smelted, first observe and judge whether the thickness of the furnace bottom refractory 3 reaches the set value, and the set value can be set to 200-600mm according to the actual use of the converter. If the thickness of the furnace bottom refractory 3 is greater than the set value, the converter can continue to be used; if the thickness of the furnace bottom refractory 3 is less than the set value, the furnace is washed until the thickness of the slag layer covered on the furnace bottom refractory 3 is ≤ 10mm, When the furnace lining temperature is cooled to 0-200°C, remove the furnace bottom shell 1 and the old furnace bottom refractory material 3 on the furnace bottom shell 1 through mechanical equip...

Embodiment 3

[0051] When the furnace lining in the prior art is cooling, the converter generally starts to cool from 1600°C, and the general joint material 12 needs to be cooled to 0-200°C before the joint material 12 can be pumped into the joint material 12, and the cooling time is generally It takes about 24 hours, the cooling cycle is long, and the efficiency of the converter is low when it is put into use.

[0052] The joint compound 12 in this embodiment is configured by including the first component and the second component. Wherein, the first component is by weight percent: magnesia 63-85wt%, pitch 0-10wt%, graphite 0-10wt%, metal powder 2-17wt%; the second component comprises 5% of the weight of the first component - 15% by weight of resin, 5-15% by weight of alcoholic substances and 0.5-1.5% by weight of curing agent.

[0053] Wherein, the magnesia is composed of one or two mixtures in any proportion of fused magnesia and sintered magnesia, and the content of MgO in the magnesia ...

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Abstract

The invention discloses a converter with a replaceable converter bottom and a converter bottom replacing method, relates to the technical field of converter smelting equipment, and solves the technical problem of short service life of the converter bottom. The converter with the replaceable converter bottom comprises a converter bottom shell and a converter body shell which are detachably connected, a converter bottom refractory material is arranged on the converter bottom shell, a converter body refractory material is arranged on the converter body shell, an annular gap is formed between theconverter bottom refractory material and the converter body refractory material, an injection port is formed in the converter bottom shell and / or the converter body shell, a movable floating block refractory material is arranged in the annular gap, and a limiting opening is formed in the top of the annular gap. According to the converter with the replaceable converter bottom, the converter bottomrefractory material on the converter bottom shell can be replaced, a joint material is injected into the annular gap through the injection port in the direction from the converter bottom to the interior of the converter, and then the filling compactness of the joint material can be fully guaranteed through judging whether the floating block refractory material moves to the limiting opening or notand whether a pumping pressure value reaches a set value or not, so that good connection between the converter bottom and the converter body is ensured.

Description

technical field [0001] The invention relates to the technical field of converter smelting equipment, in particular to a converter with a replaceable bottom and a method for replacing the bottom of the converter. Background technique [0002] With the adjustment and upgrading of my country's product structure, the output of high-grade steel sheets such as high-grade automobile sheets, electrical steel sheets, and home appliance sheets is increasing. ), but also requires the oxygen content of molten steel at the end of the converter to be as low as possible to improve the efficiency of RH vacuum decarburization and improve the initial cleanliness of molten steel. [0003] At present, the converters in my country generally use low bottom blowing stirring intensity, that is, the bottom blowing stirring intensity is generally 0.1m 3 Below / t / min, the low bottom blowing stirring intensity has played a huge role in the rapid increase of steel production and the reduction of steelma...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21C5/48C21C5/44
CPCC21C5/48C21C5/44
Inventor 高攀李海波朱国森陈斌崔阳曹勇崔园园尹娜钟凯刘风刚郭玉明赵晓东张勇邵俊宁张延宾贾祥超
Owner SHOUGANG CORPORATION