Combined type steel ladle permanent layer casting body

A pouring body and permanent layer technology, which is used in casting molten material containers, manufacturing tools, metal processing equipment, etc., can solve the problems of undiscovered composite ladle permanent layer technical reports, waste of resources, etc., and achieve excellent slag corrosion resistance. The effect of reducing manufacturing costs and alleviating resource shortages

Active Publication Date: 2015-10-14
WUGANG REFRACTORY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

According to statistics, the residual bricks of the ladle working layer discarded in my country every year are as high as more than one million tons, resulting in a huge waste of resources
[0005] No technical reports have been found on the permanent layer of the composite ladle using different refractory materials for the upper and lower parts

Method used

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  • Combined type steel ladle permanent layer casting body
  • Combined type steel ladle permanent layer casting body
  • Combined type steel ladle permanent layer casting body

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Such as figure 1 Shown: a composite ladle permanent layer pouring body, which includes the upper part 4 of the pouring body and the lower part 5 of the pouring body. position, the height difference of which is H=500-600mm; the upper part 4 of the castable body is casted with magnesium-chromium castable; the lower part 5 of the castable body is casted with aluminum-magnesium castable prepared from corundum recycled materials;

[0029] The weight and number ratio of each component in the magnesium chromium refractory castable is:

[0030]

[0031] Wherein, the fine powder is composed of component A and component B, component A is fused white corundum, component B is aluminum-magnesium spinel, and the weight ratio is 1-2:1. The micropowder A is SiO 2 The mixture of fine powder and active MgO fine powder has a weight ratio of 1:10.

[0032] The fused magnesia aggregate is classified according to particle size: 12mm2 Micropowder, SiO 2 Content ≥ 92%, particle size ≤ 5...

Embodiment 2

[0038] Such as figure 1 Shown: a composite ladle permanent layer pouring body, which includes the upper part 4 of the pouring body and the lower part 5 of the pouring body. position, the height difference of which is H=500-600mm; the upper part 4 of the castable body is casted with magnesium-chromium castable; the lower part 5 of the castable body is casted with aluminum-magnesium castable prepared from corundum recycled materials;

[0039] The weight and number ratio of each component in the magnesium chromium refractory castable is:

[0040]

[0041] Wherein, the fine powder is composed of component A and component B, component A is sintered tabular alumina, component B is aluminum magnesium spinel, and the weight ratio is 1-2:1. The micropowder is SiO 2 The mixture of fine powder and active MgO fine powder, the mixing ratio is 1:20.

[0042] Fused magnesia aggregate is divided into five grades according to particle size: 12mm2 Micropowder, SiO 2 Content ≥ 92%, partic...

Embodiment 3

[0048] Such as figure 1 Shown: a composite ladle permanent layer pouring body, which includes the upper part 4 of the pouring body and the lower part 5 of the pouring body. position, the height difference of which is H=500-600mm; the upper part 4 of the castable body is casted with magnesium-chromium castable; the lower part 5 of the castable body is casted with aluminum-magnesium castable prepared from corundum recycled materials;

[0049] The parts by weight of each component in the magnesium-chromium refractory castable are:

[0050]

[0051] Wherein, the fine powder is composed of A component and B component, the A component is sintered tabular corundum, and the B component is fused magnesia with MgO content ≥ 97%, and the weight ratio is 1-2: 1. The A micropowder is SiO 2 The mixture of fine powder and active MgO fine powder has a weight ratio of 1:15. The binder A is a mixture of pure calcium aluminate cement and hydrated magnesium oxide.

[0052] The fused magne...

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Abstract

The invention discloses a combined type steel ladle permanent layer casting body which comprises an upper casting body portion and a lower casting body portion. The combination position of the upper casting body portion and the lower casting body portion is lower than that of a work layer of a slag line and a work layer of a molten pool, and the height difference H of the combination positions is equal to 500 mm to 600 mm. The upper casting body portion is formed by casting magnesium-chromium castable. The lower casting body portion is formed by casting alumina-magnesia castable prepared from corundum reclaimed materials. The upper portion and the lower portion of a steel ladle permanent layer are formed by casting castable of different materials in a combined mode, and the magnesium-chromium fireproof castable is adopted in the upper portion; the excellent scouring preventing performance, molten steel washing preventing performance and high-temperature use strength are achieved; slag corrosion and washing of molten steel can be effectively resisted, and then the use safety coefficient of a steel ladle is improved by 5-8 times. The alumina-magnesia castable prepared from the corundum reclaimed materials is adopted in the lower portion; the service life is long, and meanwhile manufacturing cost is greatly lowered, and cost performance is improved; the problem that fireproof material resources are in short supply is effectively solved.

Description

technical field [0001] The invention relates to the technical field of refractory materials for steelmaking, in particular to a composite ladle permanent layer cast body. Background technique [0002] The refractory structure used for smelting ladle lining is mainly divided into two layers, namely permanent layer and working layer. The permanent layer is usually not in direct contact with the molten steel, and its thickness is about 80-150mm. Its main function is heat insulation, preventing the temperature of the ladle from dropping too fast and affecting the quality of pouring steel. In special cases, such as LF, RH and other out-of-furnace refining processes, due to high smelting temperature, more serious erosion and erosion and other harsh service conditions, the working layer may be damaged by accident, which will cause the permanent layer to directly contact the molten steel , because the erosion of the slag line is the most serious, the probability of steel leakage is...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22D41/02C04B35/66
Inventor 洪学勤王志强田先明雷中兴彭肖仟周芬徐炎明
Owner WUGANG REFRACTORY CO LTD
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