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Steel ladle gunning material added with calcium boride and preparation method thereof

A technology of calcium boride and gunning material, applied in the field of refractory materials, can solve the problems of refractory material damage expansion, prolonged retention time, harsh service conditions, etc., achieve good oxidation resistance and peeling resistance, simple preparation method, The effect of long service life

Inactive Publication Date: 2018-03-16
海城利尔麦格西塔材料有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

First, in order to improve production efficiency, ladles are developing toward large-scale, and the number of ladles over 90 tons is increasing rapidly; second, higher quality requirements are put forward for high-purity and high-cleanness steel, and the secondary use of molten steel in the ladle Refining treatment rates are also increasing, which leads to higher tapping temperatures and longer residence times in the ladle
These changes have made the service conditions of the ladle more severe, and the damage of refractory materials has continued to expand, especially the uneven corrosion

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0019] A preparation method of a ladle gunning material added with calcium boride, comprising the steps of:

[0020] 3) each component is weighed in proportion by weight for subsequent use;

[0021] 4) First add magnesia with a particle size of 0>1mm and magnesia with a particle size of 1mm>3mm into the mixer, dry mix for 3 to 5 minutes, and then add calcium boride, CA-50 cement, bentonite, sodium silicate and Modified asphalt, mixed for 3-5 minutes, finally added 200-mesh magnesia, mixed for 4-6 minutes, and discharged to obtain ladle gunning material.

[0022] Calcium boride is a boron-containing additive used as an anti-oxidation, anti-corrosion and thermal strength improvement for dolomite and magnesia dolomite refractories. Its structure is the structure shared by hexaboron compounds such as AB6 and RB6 (A represents alkaline earth, R represents rare earth), and it is a CsCl structure. The difference is that the B6 octahedron replaces the position of Cs. Due to the stron...

Embodiment 1-3

[0025] In embodiment 1-3, the composition formula of described a kind of ladle gunning material that adds calcium boride is as shown in table 1:

[0026] Table 1 (unit: parts by weight)

[0027] ingredients

Example 1

Example 2

Example 3

1~3mm magnesia

25

35

50

0~1mm magnesia

30

45

52

200 mesh magnesia

18

22

26

calcium boride

2

1.5

1

Sodium silicate

1

4

8

Bentonite

1.5

3

4.5

CA-50 cement

0.5

1.5

3.5

Modified asphalt

1

3

7

[0028] A kind of preparation method of adding the ladle gunning material of calcium boride described in embodiment 1-3, comprises the following steps:

[0029] 1) each component is weighed for subsequent use according to the above parts by weight;

[0030] 2) Add magnesia with particle size of 1~3mm and 0~1mm to the mixer first, dry mix for 3 minutes, then add calcium boride, CA-50 cement, bentonite, sodiu...

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Abstract

The invention relates to a steel ladle gunning material added with calcium boride and a preparation method thereof. The steel ladle gunning material comprises the following components in parts by weight: 25-52 parts of magnesia with a particle size of less than 0 but more than or equal to 1 mm, 25-52 parts of magnesia with a particle size of less than 1 mm but more than or equal to 3 mm, 18-28 parts of magnesia with a particle size of 200 meshes, 1-2 parts of calcium boride, 0.5-5 parts of CA-50 cement, 0.5-5 parts of bentonite, 1-8 parts of sodium silicate and 0.5-7 parts of modified asphalt.The steel ladle gunning material prepared through the preparation method provided by the invention is good in oxidation resistance and stripping resistance, good in fluidity, long in service life andmore suitable for large-sized steel ladles.

Description

technical field [0001] The invention relates to the technical field of refractory materials, in particular to a ladle gunning material added with calcium boride and a preparation method thereof. Background technique [0002] In recent years, my country's steelmaking technology has made new developments. First, in order to improve production efficiency, ladles are developing toward large-scale, and the number of ladles over 90 tons is increasing rapidly; second, higher quality requirements are put forward for high-purity and high-cleanness steel, and the secondary use of molten steel in the ladle Refining treatment rates are also increasing, which leads to higher tapping temperatures and longer residence times in the ladle. These changes have made the service conditions of the ladle more severe, and the damage of refractory materials has continued to expand, especially the uneven corrosion. In order to increase the service life of the ladle, reduce the cost and reduce the l...

Claims

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Application Information

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IPC IPC(8): C04B35/043
CPCC04B35/043C04B2235/3427C04B2235/349C04B2235/3804
Inventor 刘强王新杰张义先金钊尹斌王健骁袁青峰高振升
Owner 海城利尔麦格西塔材料有限公司