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Castable for ladle and preparation method thereof

A technology of ladle casting and castable, applied in the field of ladle, can solve the problems of poor corrosion resistance and permeability, low strength of non-refined ladle castables, etc., and achieves good high temperature mechanical properties, superior erosion resistance and erosion resistance, and tight bonding. Effect

Active Publication Date: 2015-04-08
TONGDA REFRACTORY TECH CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to provide a ladle castable and its preparation method to solve the problems of low strength and poor corrosion resistance and permeability of non-refined ladle castable

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Prepare according to the following raw materials and proportions:

[0029] Sintered corundum mullite: 30mm ≥ particle size > 10mm, mass percentage is 25%; 10mm ≥ particle size > 5mm, mass percentage is 13%; 5mm ≥ particle size > 3mm, mass percentage is 12%; 3mm ≥ particle size > 1mm, mass percentage 15%. Super high bauxite: 1mm ≥ particle size > 0.088mm, 5% by mass. Corundum powder: 0.088mm ≥ particle size, the mass percentage is 12.5%. 95 sintered magnesia: 1mm ≥ particle size > 0.088mm, the mass percentage is 3%; 0.088mm ≥ particle size, the mass percentage is 8%. Spinel cement: 4% by mass. Micro silica fume: 2.5% by mass. Admixture: 0.16% by mass.

[0030] The performance of a new type of ladle castable obtained is as follows:

[0031] The bulk density after curing at 110°C for 24 hours is 2.91g.cm -3 , the flexural strength is 8.3MPa, the compressive strength is 101MP; the bulk density after firing at 1500°C for 3 hours is 3.03g.cm -3 , The flexural strength...

Embodiment 2

[0033] Prepare according to the following raw materials and proportions:

[0034] Sintered corundum mullite: 30mm ≥ particle size > 10mm, the mass percentage is 33; 10mm ≥ particle size > 5mm, the mass percentage is 11%; 5mm ≥ particle size > 3mm, the mass percentage is 8%; 3mm ≥ particle size > 1mm, the mass percentage is 11%. Super high bauxite: 1mm ≥ particle size > 0.088mm, the mass percentage is 8%; 0.088mm ≥ particle size, the mass percentage is 4.5%. Corundum powder: 0.088mm ≥ particle size, 8% by mass. 95 sintered magnesia: 1mm ≥ particle size > 0.088mm, the mass percentage is 4%; 0.088mm ≥ particle size, the mass percentage is 7%. Spinel cement: the mass percentage is 3%. Micro silica fume: 2.5% by mass. Admixture: 0.16% by mass.

[0035] The performance of a new type of ladle castable obtained is as follows:

[0036] The bulk density after curing at 110°C for 24 hours is 2.89g.cm -3 , the flexural strength is 8MPa, the compressive strength is 98MP; the bulk de...

Embodiment 3

[0038] Prepare according to the following raw materials and proportions:

[0039] Sintered corundum mullite: 30mm ≥ particle size > 10mm, the mass percentage is 33; 10mm ≥ particle size > 5mm, the mass percentage is 12%; 5mm ≥ particle size > 3mm, the mass percentage is 8%; 3mm ≥ particle size > 1mm, the mass percentage is 10%. Super high bauxite: 1mm ≥ particle size > 0.088mm, the mass percentage is 8%; 0.088mm ≥ particle size, the mass percentage is 6.5%. Corundum powder: 0.088mm ≥ particle size, the mass percentage is 6%. 95 sintered magnesia: 1mm ≥ particle size > 0.088mm, the mass percentage is 3%; 0.088mm ≥ particle size, the mass percentage is 8%. Spinel cement: the mass percentage is 3%. Micro silica fume: 2.5% by mass. Admixture: 0.16% by mass.

[0040] The performance of a new type of ladle castable obtained is as follows:

[0041] The bulk density after curing at 110°C for 24 hours is 2.88g.cm -3 , the flexural strength is 8.2MPa, the compressive strength is 96...

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Abstract

The invention relates to castable for ladle and a preparation method thereof, and belongs to the technical field of ladle. The castable for the ladle comprises the following raw materials by weight percent: 48 to 77 percent of sintered corundum mullite, 13 to 27 percent of high-aluminum auxiliary materials, 9 to 15 percent of 95 sintered magnesia, 2 to 5 percent of spinel cement, 1.5 to 3.5 percent of silica fume and 0.1 to 0.25 percent of additives. The castable for the ladle has advantages that compared with the traditional ladle castable, the anti-scouring performance and anti-erosion capacity are excellent, the running period of the ladle tends to be fixed, and the schedulability of the ladle repairing time can be improved.

Description

technical field [0001] The invention belongs to the field of ladle technology, in particular to a ladle castable and a preparation method thereof. In particular, a new type of ladle castable for non-refined ladles. Background technique [0002] After entering this century, China's iron and steel industry has developed by leaps and bounds, and the output of iron and steel has increased sharply year after year. In 2013 alone, crude steel output reached 779 million tons, ranking first in the world. The rapid development of the steel industry also puts forward new requirements for the technological progress of the refractory industry. The development of refined steel technology represents the development direction of steelmaking technology, but the supporting technologies related to non-refined ladles, which account for the vast majority of output, have not attracted enough attention. At present, refractory materials for non-refined steel ladles in my country are still at the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/66
Inventor 安建成王林俊王亚利陈超群赵春燕朱明明
Owner TONGDA REFRACTORY TECH CO LTD
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