Tundish composite magnesium calcium coating material for clean steel and preparation method of tundish composite magnesium calcium coating material

A tundish, magnesium-calcium technology, applied in the field of refractory materials, can solve the problems of poor construction performance, poor hydration resistance, and affecting the life of the tundish, and achieve the effect of excellent waterproof performance and good construction performance

Active Publication Date: 2017-09-01
MAANSHAN IRON & STEEL CO LTD
View PDF2 Cites 5 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, the magnesium-calcium spread mainly has the following problems: (1) the magnesium-calcium spread has poor hydration resistance and

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Tundish composite magnesium calcium coating material for clean steel and preparation method of tundish composite magnesium calcium coating material
  • Tundish composite magnesium calcium coating material for clean steel and preparation method of tundish composite magnesium calcium coating material
  • Tundish composite magnesium calcium coating material for clean steel and preparation method of tundish composite magnesium calcium coating material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] A tundish composite magnesium-calcium smear for clean steel, comprising the raw materials by weight percentage as shown in Example 1 in Table 1:

[0043] The raw material ratio table of the magnesium-calcium spread of each embodiment of table 1

[0044] raw material Example 1 Example 2 Example 3 Example 4 Example 5 Comparative Example 1 Comparative Example 2 magnesia 42.0％ 50.0％ 49.0％ 33.0％ 21.0％ 55.0％ 15.0％ Magnesium calcium sand 40.0％ 20.0％ 30.0％ 23.0％ 14.0％ - 30.0％ limestone 8.0％ 18.0％ 10.0％ 24.0％ 30.0％ 30.0％ 18.0％ Calcium hydroxide 4.0％ 6.0％ 4.0％ 8.0％ 10.0％ 10.0％ 20.0％ Microsilica 2.0％ 2.0％ 2.0％ 1.2％ 3.0％ 2.0％ 2.0％ paper fiber 1.0％ 1.0％ 0.5％ 1.4％ 2.0％ 2.0％ 3.0％ clay mud 1.0％ 1.0％ 3.0％ 2.1％ 5.0％ - 3.0％ calcium chloride 1.0％ 1.0％ 0.5％ 1.7％ 2.8％ - 5.0％ trimeric 0.5％ 0.5％ 0.5％ 0.7％ 1.0％ 0.5％ 2.0％ Six partial 0.5％ 0.5％ 0.5％ 0.7％ 1.0％ ...

Embodiment 2

[0050] A tundish composite magnesia-calcium spread for clean steel includes raw materials in weight percentage as shown in Example 2 in Table 1.

[0051] Its preparation method is as follows:

[0052] (1) the magnesia-calcium sand, limestone, calcium hydroxide and magnesia sand of formula amount are mixed uniformly, and mixed material A is obtained;

[0053] (2) uniformly mix other remaining formula materials to make mixed material B;

[0054] (3) After mixing the mixture material A obtained in step (1) and the mixture material B obtained in step (2), the tundish composite magnesium-calcium coating material for clean steel can be obtained by testing and packaging. Table 2.

Embodiment 3

[0056]A tundish composite magnesia-calcium spread for clean steel includes raw materials in weight percentages as shown in Example 3 in Table 1.

[0057] Its preparation method is as follows:

[0058] (1) the magnesia-calcium sand, limestone, calcium hydroxide and magnesia sand of formula amount are mixed uniformly, and mixed material A is obtained;

[0059] (2) uniformly mix other remaining formula materials to make mixed material B;

[0060] (3) After mixing the mixture material A obtained in step (1) and the mixture material B obtained in step (2), the tundish composite magnesium-calcium coating material for clean steel can be obtained by testing and packaging. Table 2.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention discloses a tundish composite magnesium calcium coating material for clean steel and a preparation method of the tundish composite magnesium calcium coating material. The tundish composite magnesium calcium coating material for the clean steel is prepared from the following raw materials by weight percent: 10 to 40 percent of magnesia-calcium clinker, 8.0 to 30.0 percent of limestone, 20 to 55 percent of magnesia, 1 to 10 percent of slaked lime powder, 0.5 to 2 percent of paper fibers, 0.5 to 5 percent of clay, 0.5 to 3 percent of calcium chloride, 0.5 to 3 percent of silica powder, 0.1 to 1.0 percent of sodium tripolyphosphate and 0.1 to 1.0 percent of sodium hexametaphosphate. At a high temperature, CaO in the magnesium calcium coating material mainly exists in a free state, nonmetal impurities such as S, P, Si, Al and the like in the molten steel can be effectively absorbed, the content of impurities and the particle size of the impurities in the steel can be greatly reduced, the waterproof performance is excellent, and the tundish composite magnesium calcium coating material can be suitable for the sudden change of temperature in tundish; and the tundish composite magnesium calcium coating material has appropriate normal-temperature strength, mid-temperature strength and high-temperature strength, has high damage resistance to the high-temperature molten steel, has good construction performance and is convenient to smear and construct.

Description

technical field [0001] The invention belongs to the field of refractory materials, and particularly relates to a tundish compound magnesium-calcium smear for clean steel and a preparation method thereof. Background technique [0002] With the development of the iron and steel industry and the increase in the demand for clean steel, the quality requirements for refractory materials are getting higher and higher, and the cleanliness of steel is closely related to the material, variety, quality and use of refractory materials. At present, there are two kinds of coating materials used in continuous casting tundish working lining: magnesium and magnesium-calcium. Compared with magnesium smear, magnesia-calcium has better deoxidation and denitrification effect of molten steel. Si, Al and other non-metallic inclusions can greatly reduce the inclusion content and inclusion particle size in the steel. [0003] But magnesia-calcium spreads mainly have the following problems: (1) Mag...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): C04B35/043B22D41/02
CPCB22D41/02C04B35/043C04B2235/3208C04B2235/3418C04B2235/349C04B2235/5212
Inventor 齐书祥刘自民饶磊张丽丽王洛舒翔冯顺华何云峰
Owner MAANSHAN IRON & STEEL CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap