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A kind of breathable material for ladle and preparation method thereof

A technology of breathable material and ladle, applied in application, casting equipment, household appliances, etc., can solve the problems of insufficient high temperature strength and breathability stability of breathable material, unstable breathability, poor corrosion resistance, etc. Ingenious performance, high mechanical strength and stable breathability

Active Publication Date: 2021-12-17
WUHAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the actual use process, there are mainly problems such as unstable air permeability, poor corrosion resistance and low high temperature strength of breathable materials.
[0004] In the existing technical solutions, the introduction of additives to promote the sintering of the breathable material and adjust the structure has played a certain role in improving the mechanical strength and corrosion resistance of the breathable material, but the high temperature strength and breathability stability of the breathable material There are still some deficiencies

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0055] A breathable material for ladle and a preparation method thereof. The preparation method described in this embodiment is:

[0056] In the first step, 40-45wt% corundum fine powder, 1-10wt% α-Al 2 o 3 Micro powder, 45-50wt% quartz sand fine powder, 1-10wt% aluminum hydroxide, 1-10wt% aluminum fluoride, 1-5wt% additive, 1-5wt% foaming agent, 1-5wt% The foam stabilizer, 0.1-1wt% water reducer and 1-5wt% calcium aluminate cement are mixed to obtain a mixture; then 10-15wt% of water is added to the mixture, stirred evenly, poured and solidified for 15 After ~20 hours, a solidified green body is obtained.

[0057] The second step is to dry the cured body at 90-110°C for 12-16 hours, and then heat-treat at 1500-1600°C for 5-7 hours to obtain pre-fired material; then crush the pre-fired material and screen To obtain the granular material A with a particle size of less than 0.25 mm and the granular material B with a particle size of 0.25 to 1 mm.

[0058] The 3rd step, with...

Embodiment 2

[0070] A breathable material for ladle and a preparation method thereof. The preparation method described in this embodiment is:

[0071] In the first step, 45-50wt% corundum fine powder, 1-10wt% α-Al 2 o 3 Fine powder, 40-45wt% quartz sand fine powder, 1-10wt% aluminum hydroxide, 1-10wt% aluminum fluoride, 1-5wt% additive, 1-5wt% foaming agent, 1-5wt% Foam stabilizer, 0.1-1wt% water reducing agent and 1-5wt% calcium aluminate cement are mixed to obtain a mixture; then 14-20wt% of water is added to the mixture, stirred evenly, poured and solidified for 10 After ~16 hours, a solidified green body was obtained.

[0072] The second step is to dry the cured green body at 100-120°C for 15-20 hours, and then heat-treat at 1400-1500°C for 5-7 hours to obtain pre-fired material; then crush the pre-fired material and screen To obtain the granular material A with a particle size of less than 0.25 mm and the granular material B with a particle size of 0.25 to 1 mm.

[0073] The thir...

Embodiment 3

[0085] A breathable material for ladle and a preparation method thereof. The preparation method described in this embodiment is:

[0086] In the first step, 50-55wt% corundum fine powder, 1-10wt% α-Al 2 o 3 Fine powder, 35-40wt% quartz sand fine powder, 1-10wt% aluminum hydroxide, 1-10wt% aluminum fluoride, 1-5wt% additive, 1-5wt% foaming agent, 1-5wt% Foam stabilizer, 0.1-1wt% water reducing agent and 1-5wt% calcium aluminate cement are mixed to obtain a mixture; then 15-18wt% of water is added to the mixture, stirred evenly, poured and solidified for 12 After ~17 hours, a solidified green body was obtained.

[0087] The second step is to dry the solidified body at 90-110°C for 18-24 hours, and then heat-treat at 1450-1550°C for 5-7 hours to obtain pre-fired material; then crush the pre-fired material and screen To obtain the granular material A with a particle size of less than 0.25 mm and the granular material B with a particle size of 0.25 to 1 mm.

[0088] In the thi...

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Abstract

The invention relates to a breathable material for ladle and a preparation method thereof. Its technical scheme is: corundum fine powder, α‑Al 2 o 3 Mix fine powder, quartz sand fine powder, aluminum hydroxide, aluminum fluoride, additives, foaming agent, foam stabilizer, water reducer and calcium aluminate cement, add water, stir, form, solidify, dry, at 1400~1600℃ Heat treatment, crushing, and sieving to obtain granular material A and granular material B with different particle sizes. Then mix the thermosetting phenolic resin, surface active agent, elemental silicon powder, silicon carbide powder, copper powder and ammonium metavanadate, and stir evenly to obtain the modified resin. Then corundum particles, granular material A, granular material B, graphite flakes, silicon carbide powder and modified resin are uniformly mixed, pressed and molded, and heat-treated at 100-300° C. to obtain a breathable material for ladle. The invention has low production cost, and the prepared air-permeable material for ladles has the characteristics of high high-temperature flexural strength, stable air-permeability, excellent erosion resistance and long service life.

Description

technical field [0001] The invention belongs to the technical field of breathable materials. Specifically relates to a breathable material for ladle and a preparation method thereof. Background technique [0002] Hot metal pretreatment desulfurization process is an important metallurgical process for smelting low-sulfur or ultra-low-sulfur steel. Aiming at the problems of low slag removal efficiency, large iron loss and residual slag in molten iron after desulfurization of molten iron, ventilating bricks are installed on the side or bottom of the ladle. Remarkable results have been achieved in improving slag discharge and slag accumulation and improving molten iron pretreatment process. [0003] The current materials of breathable materials include clay, corundum, and spinel. According to actual working conditions, the types mainly include diffuse type, through-hole type, and slit type. In the actual use process, the main problems of air permeable materials are unstable a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/103C04B35/622C04B35/626C04B38/08C04B38/00B22D41/02C21C7/064
CPCC21C7/064C04B35/1015C04B35/103C04B35/622C04B35/62605C04B38/0041C04B38/08B22D41/02C04B2235/3222C04B2235/3218C04B2235/3208C04B2235/3232C04B2235/3239C04B2235/3826C04B2235/3284C04B2235/3418C04B2235/445C04B2235/428C04B2235/407C04B2235/425C04B2235/96C04B2235/77C04B38/0067C04B38/0074
Inventor 王周福熊鑫刘浩王玺堂马妍
Owner WUHAN UNIV OF SCI & TECH
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