Preparation for material resistant to aluminum water corrosion and having nonstick aluminum characteristics

A technology of water erosion and non-stick aluminum, which is applied in the field of preparation of casting nozzle materials, can solve the problems that the corrosion resistance and non-sticking aluminum characteristics of casting nozzle materials are not reflected, and increase the fluidity of aluminum water, so as to improve the resistance to aluminum water erosion With the characteristics of not hanging on aluminum, the effect of increasing corrosion resistance and good processing performance

Active Publication Date: 2016-05-04
SINOSTEEL LUOYANG INST OF REFRACTORIES RES
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Chinese invention patent CN202845724U adds aluminum titanate at the outlet of the nozzle to increase the fluidity of aluminum water in the cavity of the nozzle, and attaches a thermal insulation layer on the surface of the nozzle material to increase the thermal insulation performance of the nozzle and resist the nozzle material. Corrosion properties and non-stick aluminum properties are not reflected

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Take 40% Al 2 o 3 , 60%SiO2 2 100kg of ceramic fiber, 15kg of alumina powder, 1kg of silicon nitride whisker, 3kg of mullite whisker, 1kg of fumed silica powder, 2kg of barium chloride, 15kg of silica sol (12kg of water), 0.2kg of carboxymethyl cellulose , 1.3kg of starch, 600kg of water, put the materials into a dispersing machine, stir and disperse fully, and prepare a uniform water-based dispersion.

[0027] Put the above-mentioned homogeneously mixed aqueous dispersion into a multi-directional self-priming press, set the vacuum degree to -0.075Mpa, and the pressure to 2Mpa for molding. Dry the formed nozzle material at room temperature for 5 hours, put it in a drying oven, and raise the temperature to 150°C at a heating rate of 0.5°C / min, and the drying time is 6 hours.

[0028] Send the dried nozzle material into the sintering equipment for calcination. The temperature rise rate is controlled at 1°C / min, and the temperature is raised to 850°C. It is kept for 10 ...

Embodiment 2

[0030] Take 55% Al 2 o 3 , 45%SiO2 2 150kg of ceramic fiber, 25kg of alumina powder, 4kg of silicon nitride whisker, 6kg of mullite whisker, 0.8kg of fumed silica powder, 1kg of barium chloride, 1kg of barium nitrate, 20kg of aluminum sol (water content 15kg), hydroxypropyl Grade methyl cellulose 0.1kg, starch 2kg, water 1000kg, put the materials into a disperser, stir and disperse fully, and prepare a uniform water-based dispersion.

[0031] Put the above-mentioned homogeneously mixed aqueous dispersion into a multi-directional self-priming press, set the vacuum degree to -0.079Mpa, and the pressure to 5Mpa for molding. Dry the molded nozzle material at room temperature for 12 hours, put it in a drying oven, raise the temperature to 125°C at a rate of 2°C / min, and dry for 16 hours.

[0032] Send the dried nozzle material into the sintering equipment for calcination. The temperature rise rate is controlled at 2°C / min, and the temperature is raised to 950°C, kept for 5 hours...

Embodiment 3

[0034] Take 65% Al 2 o 3 , 35%SiO2 2 120kg of ceramic fiber, 18kg of alumina powder, 5kg of silicon nitride whisker, 3kg of mullite whisker, 1kg of fumed silica powder, 1.5kg of barium carbonate, 15kg of silica-alumina sol (containing 10kg of water), carboxymethyl cellulose 0.8kg, 0.5kg of starch, and 800kg of water, put the materials into a dispersing machine, stir and disperse fully, and prepare a uniform water-based dispersion.

[0035] Put the above-mentioned homogeneously mixed aqueous dispersion into a multi-directional self-priming press, set the vacuum degree to -0.082Mpa, and the pressure to 7.2Mpa for molding. Dry the molded nozzle material at room temperature for 16 hours, put it in a drying oven, raise the temperature to 120°C at a heating rate of 1.5°C / min, and dry for 15 hours.

[0036] Send the dried nozzle material into the sintering equipment for calcination. The temperature rise rate is controlled at 3°C / min, and the temperature is raised to 850°C, kept fo...

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PUM

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Abstract

The invention relates to a preparation method for a casting nozzle material and discloses preparation for a casting nozzle material resistant to aluminum water corrosion and having nonstick aluminum characteristics. During the preparation for the casting nozzle material resistant to aluminum water corrosion and having the nonstick aluminum characteristics, ceramic fibers serve as main raw materials of the casting nozzle material, and a filler, an organic adhesive, barium salt and an inorganic binding agent are added; the ceramic fibers, the filler, the barium salt, the organic adhesive and the inorganic binding agent are mixed in a certain proportion and put into a stirrer, a solvent is added to perform stirring, and a uniformly-mixed water soluble dispersant is prepared; redundant water is discharged from a multi-directional vacuum self-suction type press, and compression molding is performed; a compression-molded blank is dried and then sintered; the sintered casting nozzle material is put into a hexagonal boron nitride solution, soaked, taken out, dried and then prepared into an aluminum-free casting nozzle material resistant to aluminum water corrosion. By virtue of the preparation method, the casting nozzle material has the characteristic of aluminum water corrosion resistance from the surface to the interior.

Description

technical field [0001] The invention relates to a preparation method of a nozzle material, in particular to a preparation method of a nozzle material which is corrosion-resistant to aluminum water and has the property of not sticking to aluminum. Background technique [0002] The casting nozzle device is the key refractory material for aluminum alloy continuous casting and rolling. It is located at the key position where the metal aluminum liquid flows from the front box into the roll, and directly affects the quality and output of the casting and rolling slab. At present, the casting nozzle material is usually made of ceramic fiber as the main raw material, a certain amount of binder is added, it is formed by vacuum suction filtration molding method, and then the casting nozzle material is obtained by high temperature sintering. The nozzle material should have excellent thermal insulation performance, good service strength, and low bulk density. At the same time, the nozzle...

Claims

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Application Information

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IPC IPC(8): C04B35/66C04B35/14C04B35/101C04B41/85
CPCC04B35/101C04B35/14C04B35/66C04B41/009C04B41/5006C04B41/85C04B2235/5276C04B2235/9676
Inventor 王刚王自强王冬冬
Owner SINOSTEEL LUOYANG INST OF REFRACTORIES RES
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