Ladle brick cup hot repairing material and preparation method thereof

A technology of hot repairing and ladle seat, applied in the field of steel-making ladle refractory materials, can solve the problems of low service life, easy corrosion and damage of ventilation seat and nozzle seat bricks, etc. The effect of inconsistent material life

Inactive Publication Date: 2020-04-10
GANGCHENG GRP LIANGSHAN RUIHAI IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is: the ventilation seat and nozzle seat bricks are easy to corrode, and the service life is lower than that of other ladle seat bricks

Method used

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  • Ladle brick cup hot repairing material and preparation method thereof
  • Ladle brick cup hot repairing material and preparation method thereof
  • Ladle brick cup hot repairing material and preparation method thereof

Examples

Experimental program
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preparation example Construction

[0047] The present invention also provides a method for preparing the above-mentioned hot-state repair material for ladle seat bricks, comprising the following steps:

[0048] Weigh each raw material according to the weight ratio, stir and mix evenly.

[0049] Wherein, in the preparation method of the above-mentioned hot-state repair material for ladle seat bricks, the stirring time is ≥5 minutes.

[0050] The repairing material of the present invention is repaired in a water-combined manner. When in use, 4-5% of water needs to be added to satisfy self-flow. It is added through a catheter, which is similar to the way some steel plants add drainage sand, and is similar to the current organic dry method. Compared with the combination, it can reduce the smoke generated by the combustion of its organic binder, which is more friendly to the environment. After the mending material of the present invention is repaired, the moisture is heated and evaporated, and the water vapor forms p...

Embodiment 1

[0059] Embodiment 1 prepares the ladle seat brick thermal repair material of the present invention

[0060] The raw materials of the repair material are shown in Table 3 below:

[0061] Table 3 raw material formula 1

[0062]

[0063] After batching, stirring and packaging, the hot-state repair material for ladle block bricks was sampled and tested according to the sampling procedures, and the physical and chemical test results are shown in Table 4:

[0064] Table 4 Example 1 Physical and chemical detection indicators of hot repair of ladle seat bricks

[0065] project Test results% Al 2 o 3 ,%

86.07 CaO, % 0.5 ZrO2,% 6.6 Bulk density (110℃×24h), g / cm 3

3.07 Flexural strength (1000℃×3h), MPa 7.24 Flexural strength (1550℃×3h), MPa 10.13 Linear change rate (1550℃×3h), % -0.2

[0066] Embodiment 1 sent 5 tons of ladle seat brick thermal repair material to the hot repair operation area, and collected data from...

Embodiment 2

[0070] Embodiment 2 prepares the ladle seat brick hot-state repair material of the present invention

[0071] The raw materials of the repair material are shown in Table 6 below:

[0072] Table 6 Implementation Recipe 2

[0073]

[0074]

[0075] After batching, mixing and packaging, the hot-state repair material for ladle block bricks was sampled and tested according to the sampling procedures, and the physical and chemical test results are shown in Table 7:

[0076] Table 7 Physical and chemical detection indicators of hot repair of ladle block brick in Example 2

[0077] project Test results% Al 2 o 3 ,%

85.74 CaO, % 0.5 ZrO2,% 6.3 Bulk density (110℃×24h), g / cm 3

2.95 Flexural strength (1000℃×3h), MPa 7.11 Flexural strength (1550℃×3h), MPa 9.5 Linear change rate (1550℃×3h), % 0.2

[0078] Embodiment 2 sent 5 tons of ladle block brick hot repair material to the hot repair operation area, collected dat...

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Abstract

The invention belongs to the technical field of steelmaking ladle refractory materials, and particularly relates to a ladle brick cup hot repairing material and a preparation method thereof. The ladlebrick cup hot repairing material is provided to solve the problems that a ventilation seat and a nozzle brick cup are prone to being corroded and damaged and the service life is shorter than that ofother ladle brick cups. The ladle brick cup hot repairing material is prepared from 39-43 wt% of carbon-free ladle brick particles, 19-23 wt% of fused alumina zirconia particles, 15-20 wt% of white corundum powder, 8-10 wt% of fine spinel powder, 8-10 wt% of alpha-alumina micro-powder, 0.5-1 wt% of silicon dust powder, 2-3 wt% of pure calcium aluminate cement, 0.1 wt% of a high-efficiency water reducing agent and 0.05-0.1 wt% of an explosion-proof fiber. The hot repairing material has the advantages of good self-flowing performance, excellent sintering performance, small linear change rate, good air permeability, certain medium and high temperature breaking strength and slag corrosion resistance, can effectively solve the phenomenon that the service life of the steel ladle brick cup blockis inconsistent with the service life of refractory materials at other parts and reduce the minor repair frequency and the labor intensity of workers, and has great practical significance.

Description

technical field [0001] The invention belongs to the technical field of steel-making ladle refractory materials, and in particular relates to a hot-state repair material for ladle seat bricks and a preparation method thereof. Background technique [0002] The maintenance of steel-making ladle cold repair refractory materials is currently more commonly used as a semi-casting and semi-masonry process. The permanent layer of the wall, the permanent layer of the bottom, and the working layer of the bottom are pouring, while the nozzle seat bricks, breathable The prefabricated bricks and slag line bricks of the transfer and cladding walls are all of the masonry type. According to the different service life of the refractory materials in each part, the maintenance and repair of the ladle is divided into three types: major repair, minor repair, and overall major repair. Minor repair usually refers to the replacement and repair of nozzle seat bricks, Air-permeable seat bricks, disman...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/106C04B35/622B22D41/02
CPCC04B35/106C04B35/62204B22D41/02C04B2235/3244C04B2235/3222C04B2235/3206C04B2235/3208C04B2235/3418C04B2235/5427C04B2235/5436C04B2235/5208C04B2235/77C04B2235/96C04B2235/9615C04B2235/9669
Inventor 青光红罗天军陈超赵杰边程军高同昌高亮邓小兵胡志豪蒋发燕
Owner GANGCHENG GRP LIANGSHAN RUIHAI IND
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