Preparation process for refractory brick on ladle slag line

A preparation process and ladle slag line technology, applied in the field of iron and steel metallurgy, can solve the problems of intensified erosion, high cost, and insignificant performance improvement, and achieve the effects of preventing oxidation, excellent performance, and saving raw materials

Inactive Publication Date: 2015-03-25
徐州鑫汇耐火材料有限公司
View PDF8 Cites 5 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, the total carbon content of ordinary magnesia-carbon bricks for ladle slag line is generally 10-18wt%, and one of the main reasons for the damage of magnesia-carbon bricks is due to the oxidation of carbon in the bricks, so that steel slag is easy to penetrate, which makes the erosion intensified, but it has been The research carried out on low-carbon magnesia-carbon bricks mainly focuses on the research of binders and carbon raw materials, such as: "Magnesia-carbon bricks containing antioxidant C-TiN composite powder and its production method" disclosed in the Chinese patent application number 200610046434.0 "C-TiN composite powder is used as antioxidant and graphite, fused magnesia, and binder respectively after mixing, molding, and heat treatment to improve the slag resistance and prolong the service life. However, due to the high cost of titanium raw materials High, it is difficult to popularize and use, and the carbon content of the magnesia-carbon brick is high, it will add carbon to the molten steel; the application number is 200710019767.9 Chinese patent "a

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] A process for preparing refractory bricks from a ladle slag line. The refractory bricks are composed of the following raw materials in parts by weight: 24 parts of waste magnesia bricks, 50% of which have a particle size of -20-+40 mesh, and -40-+100 mesh. 25%, -100-+200 mesh accounted for 25%; 48 parts of fused magnesia, of which -5-+18 mesh accounted for 35%, -18-+80 mesh accounted for 35%, -80-+150 mesh accounted for 30% , 1 part of -20 mesh graphite powder, 5 parts of -100 mesh silicon carbide, 15 parts of -100 mesh zirconia, 8 parts of -150 mesh fused mullite, 8 parts of magnesite powder, 3 parts of asbestos fiber, Suzhou bentonite 4 parts, 12 parts of zirconium boride, 1.5 parts of -200 mesh boron nitride, 3.5 parts of -200 mesh cerium oxide, 2 parts of asphalt powder, 2 parts of phenolic resin, 3 parts of sodium hexametaphosphate; 18 parts of water, the preparation The process includes the following steps:

[0019] 1) Put waste magnesia bricks, fused magnesia, s...

Embodiment 2

[0026] A process for preparing refractory bricks from a ladle slag line. The refractory bricks are composed of the following raw materials in parts by weight: 26 parts of waste magnesia bricks, 50% of which have a particle size of -20-+40 mesh, and -40-+100 mesh. 25%, -100-+200 mesh accounted for 25%; 46 parts of fused magnesia, of which -5-+18 mesh accounted for 35%, -18-+80 mesh accounted for 35%, -80-+150 mesh accounted for 30% , 2 parts of -20 mesh graphite powder, 3 parts of -100 mesh silicon carbide, 17 parts of -100 mesh zirconia, 6 parts of -150 mesh fused mullite, 10 parts of magnesite powder, 2 parts of asbestos fiber, Suzhou bentonite 6 parts, 10 parts of zirconium boride, 2.5 parts of -200 mesh boron nitride, 2.5 parts of -200 mesh cerium oxide, 3 parts of asphalt powder, 1 part of phenolic resin, 5 parts of sodium hexametaphosphate; 16 parts of water, the preparation The process includes the following steps:

[0027] 1) Put waste magnesia bricks, fused magnesia, ...

Embodiment 3

[0034] A process for preparing refractory bricks from a ladle slag line. The refractory bricks are composed of the following raw materials in parts by weight: 25 parts of waste magnesia bricks, 50% of which have a particle size of -20-+40 mesh, and -40-+100 mesh. 25%, -100-+200 mesh accounted for 25%; 47 parts of fused magnesia, of which -5-+18 mesh accounted for 35%, -18-+80 mesh accounted for 35%, -80-+150 mesh accounted for 30% , 1.5 parts of -20 mesh graphite powder, 4 parts of -100 mesh silicon carbide, 16 parts of -100 mesh zirconia, 7 parts of -150 mesh fused mullite, 9 parts of magnesite powder, 2.5 parts of asbestos fiber, Suzhou bentonite 5 parts, 11 parts of zirconium boride, 2 parts of -200 mesh boron nitride, 3 parts of -200 mesh cerium oxide, 2.5 parts of asphalt powder, 1.5 parts of phenolic resin, 4 parts of sodium hexametaphosphate; 17 parts of water, the preparation The process includes the following steps:

[0035] 1) Put waste magnesia bricks, fused magnes...

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

PropertyMeasurementUnit
Bulk densityaaaaaaaaaa
Normal temperature compressive strengthaaaaaaaaaa
High temperature flexural strengthaaaaaaaaaa
Login to view more

Abstract

The invention discloses a preparation process for a refractory brick on a ladle slag line. The preparation process comprises the following steps of (1) placing waste magnesia bricks, fused magnesia, silicon carbide, zirconia, fused millite and magnesite powder into a mixer to be mixed for about 45-60 minutes; (2) adding graphite powder, asbestos fibers, Suzhou bentonite, zirconium boride, boron nitride and cerium oxide, and mixing for about 120-135 minutes; (3) adding asphalt powder, phenol formaldehyde resin, sodium hexametaphosphate and water, and further mixing for about 150-180 minutes; (4) molding by using a press machine, and drying a green brick at the temperature of 200 DEG C for 24 hours; and (5) calcining at the temperature of about 1800-1840 DEG C, and preserving the heat for about 16-18 hours. The refractory brick prepared by using the preparation method has the following excellent performances: molten steel is recarburized by at most 2.3ppm, the volume density is 3.05-3.15g/cm<3>, the apparent porosity is 1.5-2.5%, the normal-temperature compressive strength is larger than or equal to 45MPa, the 1400-DEG C high-temperature bending strength of buried carbon is larger than or equal to 33Mpa, and the 1400-DEG C linear expansion coefficient is 1.35-1.45%. Through measuring the thermal shock resistance of the refractory brick prepared by using the preparation process disclosed by the invention by using an air quenching method comprising the step of carrying out air cooling once at the temperature 1100 DEG C, the residual strength retention rate is measured to be 74-76%.

Description

technical field [0001] The invention relates to the technical field of iron and steel metallurgy, in particular to a preparation process of a ladle slag line refractory brick. Background technique [0002] At present, the total carbon content of ordinary magnesia-carbon bricks for ladle slag line is generally 10-18wt%, and one of the main reasons for the damage of magnesia-carbon bricks is due to the oxidation of carbon in the bricks, so that steel slag is easy to penetrate, which makes the erosion intensified, but it has been The research carried out on low-carbon magnesia-carbon bricks mainly focuses on the research of binders and carbon raw materials, such as: "Magnesia-carbon bricks containing antioxidant C-TiN composite powder and its production method" disclosed in the Chinese patent application number 200610046434.0 "C-TiN composite powder is used as antioxidant and graphite, fused magnesia, and binder respectively after mixing, molding, and heat treatment to improve ...

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): C04B35/66
Inventor 朱小英
Owner 徐州鑫汇耐火材料有限公司
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