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Fireproof brick with equal terminal difference for large converter ladle inner wall and masonry method thereof

A technology for large-scale converters and refractory bricks, applied in the manufacture of converters, etc., can solve the problems of broken broken bricks, short service life, falling off, etc., and achieve the effects of reduced production costs, easy identification and differentiation, and long service life

Inactive Publication Date: 2010-04-07
武钢集团有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It is precisely because of the size difference a d -a x Brick number 21 / 0 straight bricks with = 0 are subjected to intermittent operation of cold shrinkage, thermal expansion and tilting rotation during the use of ladles, often causing straight bricks to sink, fall off or fall off residual bricks, resulting in short service life. There are even accidents of molten steel leakage
This is the fatal shortcoming of the "wedge straight" mixed bricklaying design commonly used in large-tonnage ladle walls at home and abroad.

Method used

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  • Fireproof brick with equal terminal difference for large converter ladle inner wall and masonry method thereof
  • Fireproof brick with equal terminal difference for large converter ladle inner wall and masonry method thereof
  • Fireproof brick with equal terminal difference for large converter ladle inner wall and masonry method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] In order to meet the requirement of double-wedge bricks for large-radius ladles, the wedge-shaped bricks in Table 1 are used as a group of relatively small-radius wedge-shaped bricks 1, and another group of relatively large-radius wedge-shaped bricks 2 is added to form a double-wedge brick ring. relatively large end of the brick a d with relatively little endian a x The difference between both ends is 10mm. Relatively large radius wedge brick 2 size features are selected by the following method:

[0030] From the simple calculation formula of the amount of bricks used in each ring or layer "Handbook of Furnace Lining Brick Size Design and Radial Bricklaying Calculation":

[0031] K x =0.314(R pd -R p ) (relatively small radius wedge brick 1)

[0032] K d =0.314(R p -R px ) (relatively large radius wedge brick 2)

[0033] R px and R pd ——respectively, the median radius of the relatively small-radius wedge-shaped brick 1 and the relatively large-radius wedge-s...

Embodiment 2

[0054] Example 2 For a ring or layer of the ladle wall with an outer radius of 2400mm and a working lining thickness of 210mm, calculate the middle radius R of double wedge bricks p 2295mm, the middle radius R in Table 2 p 2142.0mm~2562.0mm application range, when adopting the "equal end difference" double wedge brick of the present invention to lay bricks, use the above formula to calculate the relatively small radius (R p 2142.0mm) wedge-shaped brick 1 that is 21 / 10 quantity K 21 / 10 and a relatively large radius (R p 2562.0mm) wedge-shaped brick 21 / 10d quantity K 21 / 10d .

[0055] K 21 / 10 =0.314(2562-2295)=83.838 pieces (relatively small radius wedge-shaped brick 1)

[0056] K 21 / 10d =0.314(2295-2142.0)=48.042 pieces (relatively large radius wedge brick 2)

[0057] Therefore, this outer radius ladle wall ring or layer can be staggered by 84 brick numbers 21 / 10 relatively small radius wedge bricks 1 and 48 21 / 10d relatively large radius wedge bricks 2 to form an "equal...

Embodiment 3

[0059] Example 3 For a ring or layer of the ladle wall with an outer radius of 2600mm and a working lining thickness of 230mm, calculate the middle radius R of double-wedge-shaped brickwork p 2485mm, the middle radius R in Table 2 p 2346.0mm~2806.0mm application range, when using the "equal end difference" double wedge bricks of the present invention to lay bricks, use the above formula to calculate the relatively small radius (R p 2346.0mm) wedge-shaped brick 1 that is 23 / 10 quantity K 23 / 10 and a relatively large radius (R p 2806.0mm) wedge-shaped brick 2 is 23 / 10d quantity K 23 / 10d .

[0060] K 23 / 10 =0.314(2806-2485)=100.794 pieces (relatively small radius wedge brick 1)

[0061] K 23 / 10d =0.314(2485-2346.0)=43.646 pieces (relatively large radius wedge brick 2)

[0062] Therefore, this outer radius ladle wall ring or layer can be formed by staggered masonry of 101 brick numbers 23 / 10 relatively small-radius wedge-shaped bricks 1 and 44 23 / 10d relatively large-radius...

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Abstract

The invention relates to a firebrick for the inner wall of a ladle of a converter with outer radius of over 2,000 millimeters and a bricking method thereof. The method overcomes the disadvantages thatthe prior wedgy and straight mixed brick often has the phenomena that a straight brick is sunken by extraction and breaks down or a residual brick falls off, or needs multi-breed to cause excessive modules and increases cost and the like. The measure for solving the problems is to use the isometric end difference firebrick for the inner wall of the ladle of the large-scale converter and the bricking method thereof; the end faces of the firebrick are totally of a wedgy shape; the difference between the relatively large end ad and the relatively small end ax of each wedgy block is 10 millimeters; and the bricking method comprises the following steps: each circle or each layer of the inner wall of the ladle is bricked by two different kinds of the wedgy firebrick 1 with relatively small radius and the wedgy firebrick 2 with relative large radius alternately. The firebrick can be used with a module of the prior wedgy brick with the end difference of 10 millimeters together; the radiatingvertical seam in the radius direction of a brick body is inosculated with the radioactive ray of the radius so as to produce a staggered platform uneasily; and the brick body has smooth surface, can notproduce the phenomena of extractive sinking, breaking and the like, and the firebrick is safe, reliable and low in cost and only uses two kinds of wedgy bricks.

Description

technical field [0001] The invention relates to a refractory brick and a masonry method, and more belongs to a refractory brick and a masonry method for the inner wall of a large-scale (generally, the outer radius is more than 2000mm) converter ladle whose diameter changes along the height direction. It can also be used for refractory bricks on the inner wall of large-scale rotary kilns and their masonry methods. Background technique [0002] The outer radius of the upper mouth of the steelmaking ladle in my country is less than 2000mm, and the working lining of the small and medium tonnage ladle has a thickness of 150mm-190mm (dimension b in Table 1). , or brick No. 17 / 20 and brick No. 17 / 10, or brick No. 19 / 20 and brick No. 19 / 10 two kinds of wedge-shaped bricks are matched to the double-wedge brick brick design (without straight bricks). At present, the large-tonnage steel ladle (thickness of the working lining of the cladding wall is more than 210mm (dimension b in Table...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C21C5/44
Inventor 万小平薛启文莫瑛
Owner 武钢集团有限公司