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Preparation method of tundish nozzle

A technology of tundish and nozzle, which is applied in the field of preparation of tundish nozzle, can solve the problem of no tundish nozzle being found, and achieve the effect of dense product, improved performance and uniform structure

Active Publication Date: 2012-06-20
SINOSTEEL LUOYANG INST OF REFRACTORIES RES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the existing research on gel injection molding, the process of preparing porous ceramics and ceramic cylinder liners by gel injection molding, as well as the research on improving the gel injection molding process, did not find that gel injection molding Research on application of the method to the nozzle of the tundish

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] 1.1. Preparation of slurry: Dissolve 54 grams of acrylamide and 3 grams of N'N-methylenebisacrylamide in a beaker containing 350 grams of deionized water to obtain a premixed solution, and pour it into a ball mill tank; weigh 1722.5 grams of zircon (325 mesh), 265 grams of calcia partially stabilized zirconia (325 mesh), 662.5 grams of monoclinic zirconia (4000 mesh), 25 grams of titanium oxide, 20 grams of dispersant ammonium polyacrylate and 5 grams of defoaming Add n-octanol to the ball mill tank, use zirconia balls as the grinding balls, and mix for 20 minutes after ball milling, then add ammonia water to adjust the pH value of the slurry to 10, and make a slurry after 20 hours of ball milling.

[0030] 1.2. Forming and drying. Add 2.0 grams of initiator ammonium persulfate and 0.15 grams of catalyst tetramethylethylenediamine to the slurry in step 1 respectively, degas and vacuumize the slurry and stir evenly. Inject into the forming mold, and gel curing and moldi...

Embodiment 2

[0033] 2.1. Slurry preparation: Dissolve 30 grams of acrylamide, 45 grams of hydroxymethyl acrylamide, and 7 grams of N'N-methylenebisacrylamide in a beaker filled with 250 grams of deionized water to obtain a premixed liquid, pour In a ball mill jar; weigh 1625 grams of zircon (325 mesh), 125 grams of monoclinic zirconia (325 mesh), 500 grams of zircon powder (600 mesh), 250 grams of monoclinic zirconia (4000 mesh), 25 Put 1 gram of polyacrylic acid ammonia and 4 grams of defoamer n-octanol into the ball mill tank, use zirconia balls as grinding balls for ball milling and mix for 30 minutes, add ammonia water to adjust the pH value of the slurry to 10, and make a slurry after 36 hours of ball milling .

[0034] 2.2. Forming and drying. Add 3.2 grams of initiator ammonium persulfate and 0.10 grams of catalyst tetramethylethylenediamine to the slurry in step 1 respectively, degas and vacuumize the slurry and stir evenly. Inject into the forming mold, and gel curing and moldin...

Embodiment 3

[0037] 3.1. Slurry preparation: Dissolve 167.37 grams of methacrylic acid amine and 20.92 grams of polyethylene glycol dimethacrylate in a beaker containing 418.43 grams of deionized water to obtain a premixed liquid, pour it into a ball mill tank; 2040 grams of zircon (325 mesh), 360 grams of monoclinic zirconia (4000), 24.24 grams of titanium oxide, 2.42 grams of polyacrylic acid ammonia and 0.24 grams of antifoaming agent polyether-siloxane copolymer into the ball mill jar, Use zirconia balls as grinding balls. After ball milling and mixing for 20 minutes, add ammonia water to adjust the pH value of the slurry to 10. After ball milling for 24 hours, the slurry is made.

[0038]3.2. Forming and drying: 16.73 grams of initiator potassium persulfate and 3.34 grams of catalyst tetramethylethylenediamine were added to the slurry in step 1, and the slurry was degassed and vacuumized and stirred evenly. Inject into the forming mold, and gel curing and molding at 15°C and 95%RH hum...

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PUM

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Abstract

The invention relates to the field of inorganic non-metal materials, discloses a preparation method of a gelcasting tundish nozzle and particularly relates to a forming method during the preparation process of the tundish nozzle. The preparation method is characterized by comprising the steps of mixing raw materials, namely deionized water, organic monomers, a cross-linking agent and powder, and adding an initiator and a catalyst for realizing in-situ solidification forming. Compared with a traditional machine pressing forming method, the preparation method has the advantages of convenience in operation, low labor intensity and net forming, the formed product has a uniform organizational structure and the blank strength of the dried product is high and the blank quality of the product is improved greatly.

Description

technical field [0001] The invention relates to the field of inorganic non-metallic materials, in particular to a method for preparing a tundish nozzle. Background technique [0002] The nozzle is one of the functional refractory materials, which can control the flow and velocity of molten steel, and its performance can directly affect the continuous casting time. Therefore, the nozzle must have good thermal stability and corrosion resistance, which determines that the nozzle product has the characteristics of low porosity and high density. [0003] Zircon material is an acidic material with high refractoriness, low linear expansion coefficient, good thermal stability, erosion resistance, and corrosion resistance. The nozzle made of zirconium material has a long service life. At present, most of the nozzles produced in China are machine-pressed, and a small amount are casted. However, most of the nozzles that are machine-pressed are unevenly mixed, resulting in inc...

Claims

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Application Information

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IPC IPC(8): C04B35/66C04B35/622
Inventor 姜欣王刚刘国齐王来稳申西杰王传运
Owner SINOSTEEL LUOYANG INST OF REFRACTORIES RES
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