Rapid baking type tundish dry material and preparation method thereof

A rapid and raw material technology, applied in the field of refractory materials, can solve the problems that the baking effect cannot meet the use requirements, affect the service life of refractory materials, poor compactness and bonding strength, etc., achieve good application prospects, improve thermal conductivity and cost low effect

Active Publication Date: 2018-09-14
NORTHEASTERN UNIV
View PDF9 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Tundish dry material is a widely used refractory material for working lining of tundish; the masonry tundish is usually required to be quickly baked to 950-1100°C before use in order to increase the temperature of the refractory lining inside the tundish and remove it. If the baking time is too short, the baking effect will not meet the requirements of use; if the baking time is too long, it will easily lead to the deterioration of the performance of functional components such as nozzles and stoppers assembled; The layer thickness of the dry tundish is usually 50-100mm. In order to achieve a good baking effect, the baking time is generally required to be about 2-4 hours; very important
[0003] The current tundish dry material mainly uses magnesia of different grades and different particle sizes as the main raw material; according to different bonding methods, it can be divided into several types such as carbon bonding, inorganic salt bonding and oxide powder bonding; among them, carbon bonding magnesium Dry-type materials are widely used because of their good high temperature resistance and corrosion resistance; in this type of magnesia-carbon refractory materials, the matrix part mainly composed of binder and magnesia fine powder has poor compactness and bonding strength. Once the carbonaceous material used as the bi

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

Example Embodiment

[0023] Example 1

[0024] The raw material components of the quick-baking tundish dry material account for 66% by weight of sintered magnesia particles, 17% of sintered magnesia fine powder, 10% of metal iron powder, 5% of carbonaceous binder, and 2% of additives. %; the carbonaceous binder is phenolic resin, and the weight content of its fixed carbon is 46.2%; the additive is alumina powder, and its Al 2 O 3 The weight content is 98.5%, and the particle size is less than or equal to 325 meshes;

[0025] Among them, the sintered magnesia particles are the part of the sintered magnesia with a particle size of ≤3mm and >200 mesh, and the sintered magnesia fine powder is the part of the sintered magnesia with a particle size of ≤200 mesh; the weight percentage of MgO in the sintered magnesia particles and the sintered magnesia fine powder ≥90%; Fe weight percentage in metal iron powder ≥95%, particle size ≤180 mesh;

[0026] The preparation method is:

[0027] Premix sintered...

Example Embodiment

[0031] Example 2

[0032] The raw material components of the quick-baking tundish dry material account for 64% of sintered magnesia particles, 24% of sintered magnesia fine powder, 5% of metal iron powder, 4% of carbonaceous binder, and 3% of additives. %; the carbonaceous binder is industrial sucrose; the additive is silicon powder, the weight purity is ≥98%, and the particle size is ≤200 mesh; the rest are the same as in Example 1;

[0033] The method is the same as in Example 1, except that:

[0034] The pre-mixing time is 23 minutes, and the sintered magnesia particles are added and mixed for 20 minutes;

[0035] After the tundish dry material is formed by vibration construction, it is baked at 1000℃ for 1.0h to make a tundish working lining with a thickness of 100mm, and its bulk density is 2.72g / cm 3 , the apparent porosity is 21.5%, the compressive strength at room temperature is 42.3MPa; the service life of the tundish working lining is 28 hours.

Example Embodiment

[0036] Example 3

[0037] The raw material components of the quick-baking tundish dry material account for 65% by weight of sintered magnesia particles, 20% of sintered magnesia fine powder, 8% of metal iron powder, 4.5% of carbonaceous binder, and 2.5% of additives. %; the carbonaceous binder is an equal quality mixture of phenolic resin and industrial sucrose; the additive is B 4 C powder, weight purity ≥98%, particle size ≤200 mesh; the rest are the same as in Example 1;

[0038] The method is the same as in Example 1, except that:

[0039] The pre-mixing time is 25 minutes, and the sintered magnesia particles are added and mixed for 18 minutes;

[0040] After the tundish dry material is formed by vibration construction, it is baked at 950℃ for 1.5h to make a tundish working lining with a thickness of 80mm, and its bulk density is 2.76g / cm 3 , the apparent porosity is 20.8%, the compressive strength at room temperature is 35.2MPa; the service life of the tundish working ...

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
Granularityaaaaaaaaaa
Granularityaaaaaaaaaa
Granularityaaaaaaaaaa
Login to view more

Abstract

The invention discloses a rapid baking type tundish dry material and a preparation method thereof. The rapid baking type tundish dry material is prepared from the following raw material components inpercentage by weight: 61-66% of sintered magnesia particles, 17-24% of sintered magnesia fine powder, 5-10% of metal iron powder, 4-5% of a carbon binding agent, and 2-3% of an additive. The preparation method for the rapid baking type tundish dry material comprises the following steps of: (1) pre-mixing the sintered magnesia fine powder, the metal iron powder, the carbon binding agent and the additive in a sand mixer; and (2) adding the sintered magnesia particles to continuously mix. The rapid baking type tundish dry material provided by the invention can remarkably improve heat conduction ability of a dry type material layer, effectively shortens roasting time, reduces dosage of oxide micro powder, and reduces production cost. The method is simple in production cost, is low in cost, islong in product service life and has a good application prospect.

Description

technical field [0001] The invention belongs to the technical field of refractory materials, in particular to a quick-baking tundish dry material and a preparation method thereof. Background technique [0002] Tundish dry material is a widely used refractory material for working lining of tundish; the masonry tundish is usually required to be quickly baked to 950-1100°C before use in order to increase the temperature of the refractory lining inside the tundish and remove it. If the baking time is too short, the baking effect will not meet the requirements of use; if the baking time is too long, it will easily lead to the deterioration of the performance of functional components such as nozzles and stoppers assembled; The layer thickness of the dry tundish is usually 50-100mm. In order to achieve a good baking effect, the baking time is generally required to be about 2-4 hours; very important. [0003] The current tundish dry material mainly uses magnesia of different grade...

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): B22D41/02C22C29/12C22C1/05
CPCB22D41/02B22D41/023C22C1/051C22C29/12
Inventor 陈敏高嵩王楠徐磊叶振川
Owner NORTHEASTERN UNIV
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