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Self flow type pumping wet spray high aluminum refractory material for steel ladle permanent lining

A technology of wet spraying and refractory materials, which is applied in the field of ladle refractory materials, and can solve the problems of low and unsuitable medium temperature strength

Inactive Publication Date: 2006-01-04
BAOSHAN IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Japanese Patent JP-269399 / 96 describes "a castable refractory composition for producing dense castable refractories and its wet spraying method", the refractory is a cement-free refractory, after drying Low strength and medium temperature strength within 1000℃, not suitable for integral refractory material for permanent lining of ladle

Method used

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  • Self flow type pumping wet spray high aluminum refractory material for steel ladle permanent lining
  • Self flow type pumping wet spray high aluminum refractory material for steel ladle permanent lining
  • Self flow type pumping wet spray high aluminum refractory material for steel ladle permanent lining

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0038] Examples are shown in Table 3.

[0039] Ingredients (wt%)

Example

comparative example

1

2

3

4

1

High alumina bauxite

8~5mm

12

12

12

12

12

5~3mm

13

13

13

13

12

3~1mm

20

20

20

20

20

1~0.1mm

18

18

18

18

18

-0.088mm

6

16

12

12

8

Kyanite

-0.1mm

7

1

3

6

7

Aluminum oxide powder

D. 50 ≤2.5μ

15

High alumina powder

D. 50 ≤4μ

18

14.5

15

11

Silica ultrafine powder

D. 50 ≤1μ

1

1.5

2

3

2

[0040] calcium aluminate cement

Secar71

5

4

5

5

5

Hexametaphosphate

plus

0.15

Naphthalenesulfonic acid formal

...

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Abstract

The flowing pumped wet sprayed high aluminum refractory material for permanent lining of steel ladle consists of high alumina bauxite 68-83 wt%, high alumina fine powder of average diameter smaller than 4 micron 10-18 wt%, cyanite powder 1-7 wt%, superfine silica powder of average diameter smaller than 1 micron 1-4 wt%, calcium aluminate cement 4-6 wt%, and high efficiency water reducing agent 0.3-0.6 wt%. The flowing pumped wet sprayed high aluminum refractory material of the present invention has excellent flowing performance and high fire resisting performance.

Description

technical field [0001] The invention relates to ladle refractories Background technique [0002] Wet spraying technology for refractory materials is one of the major technological advances in the field of refractory materials in the world in recent years. Wet spraying technology can be applied not only to the lining of various metallurgical furnace linings, but also to the repair and maintenance of old furnace linings. In this method, the refractory material mixed with a certain amount of water is pumped to the nozzle, and the compressed air is used at the rear of the nozzle to add the coagulant to the mixture to quickly condense and spray it onto the construction surface to form a refractory lining. or patch layers. This process can form a refractory material layer with a required thickness without any mold; the density of the sprayed layer is close to that of the pouring forming layer; the construction investment is less manpower, the construction time is short (about ha...

Claims

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Application Information

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IPC IPC(8): C04B35/66C04B28/06C04B14/04
Inventor 陈荣荣赵明何平显
Owner BAOSHAN IRON & STEEL CO LTD
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