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High basicity tundish cover agent and its production method

A covering agent and tundish technology, applied in the field of metallurgy, can solve the problems of slow melting speed of the covering agent and fast melting speed of the covering agent, and achieve the effects of rapid and uniform slag forming ability, good environmental protection effect and good spreadability.

Inactive Publication Date: 2007-05-30
上海盛宝冶金科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In addition, some people think that the melting speed of the covering agent is slow enough to prevent crusting on the upper layer of slag, but the ability of the slag to absorb impurities will decrease; thick crust

Method used

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  • High basicity tundish cover agent and its production method

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Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0020] The features of the present invention and other relevant features are described in further detail below through the embodiments, so as to facilitate the understanding of those skilled in the art:

[0021] Reality

apply

example

Covering agent composition (weight percent %)

Bulk specific gravity

(g / cm 3

)

CaO

SiO 2

al 2 o 3

MgO

CaF 2

B 2 o 3

Na 2 o

burning

Additives

one

30.55

10.18

28.56

15.13

4.10

1.51

7.47

2.5 (yellow dextrin)

0.82

two

32.67

9.33

25.78

16.21

3.55

1.82

7.64

3.0 (801 glue)

1.09

three

36.21

9.12

27.32

12.88

3.62

1.65

6.20

2.0 (yellow dextrin)+

1.0 (801 glue)

0.87

Four

38.16

12.74 ...

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PUM

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Abstract

A high PH value ball type hollow coating agent comprises burnt lime, silica dioxide, and alumind, with the former two taking 40%-70% of the total weight and their rate 2.8:5, alunind taking 15%-40% of the total weight, with pre smelt, high PH value, carbon free material and spraying grain making process, enjoying fine heat preserving capacity, retaining three layer structure, without crustization, with improved capability in avoiding secondary oxidization of steel liquid and impurities adhesion.

Description

technical field [0001] The invention relates to metallurgy, in particular to a high-alkalinity spherical hollow tundish covering agent. Background technique [0002] The tundish covering agent is used to cover the surface of the molten steel in the tundish during the continuous casting process. Its basic requirements are not to have adverse reactions with the molten steel to avoid contamination of the molten steel; it does not corrode the alkaline tundish lining. Its main function is to keep the molten steel warm, to avoid the excessive temperature drop of the molten steel in the tundish during the pouring process and to form cold steel on the surface of the molten steel; to form a liquid slag layer covering the surface of the molten steel to isolate the air and prevent the secondary oxidation of the molten steel; to absorb the floating inclusions in the molten steel objects, clean molten steel; prevent molten steel from resulfurization, etc. [0003] With the continuous de...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22D11/111B01J2/04
Inventor 刘欣隆孙树森刘成刚王金潮
Owner 上海盛宝冶金科技有限公司
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