Aluminum alloy melting covering agent
A covering agent and aluminum alloy technology, which is applied in the field of aluminum smelting, can solve the problems of reducing aluminum conductivity, poor boron deoxidation effect, magnesium inclusions, etc., achieves strong chemical stability and thermal stability, ensures composition and performance, and promotes flotation flow effect
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[0015] Example 1
[0016] The aluminum alloy smelting covering agent in this embodiment is composed of the following parts by mass: 8 parts of boron carbide, 5 parts of silica sand, 12 parts of nano-ceramics, 12 parts of aluminum oxide, 15 parts of chaff ash, modified 10 parts of sexually expanded perlite and 8 parts of wollastonite.
[0017] The above aluminum alloy smelting covering agent includes the following preparation steps:
[0018] (1) Soak the above weight parts of wollastonite and aluminum oxide with 8% sulfuric acid for 8 hours, wash with deionized water, and then soak with 12% sodium hydroxide solution for 5 hours, and then wash with deionized water until neutral , Then calcined at 550°C for 2 hours, broken into pieces with a particle size of 1~3mm;
[0019] (2) Add the above mass parts of boron carbide, silica sand and nano-ceramics to 1.2g / L potassium permanganate solution to soak to remove impurities, then filter and wash to neutral, calcined at 400℃ for 2 hours, and ...
Example Embodiment
[0023] Example 2
[0024] The aluminum alloy smelting covering agent in this embodiment is composed of the following components by mass: 16 parts of boron carbide, 10 parts of silicon sand, 25 parts of nano-ceramics, 20 parts of aluminum oxide, 26 parts of chaff ash, modified 30 parts of sexually expanded perlite and 20 parts of wollastonite.
[0025] The above aluminum alloy smelting covering agent includes the following preparation steps:
[0026] (1) Soak the above weight parts of wollastonite and aluminum oxide with 12% sulfuric acid for 5 hours, wash with deionized water, and then soak with 10% sodium hydroxide solution for 8 hours, and then wash with deionized water until neutral , Then calcined at 800°C for 2 hours, broken into pieces with a particle size of 1~3mm;
[0027] (2) Add the above mass parts of boron carbide, silica sand and nano-ceramics to 1.2g / L potassium permanganate solution to soak to remove impurities, then filter and wash to neutral, calcined at 400℃ for 2 h...
Example Embodiment
[0031] Example 3
[0032] The aluminum alloy smelting covering agent in this embodiment is composed of the following parts by mass: 12 parts of boron carbide, 8 parts of silica sand, 18 parts of nano-ceramics, 16 parts of aluminum oxide, 20 parts of chaff ash, modified 20 parts of sexually expanded perlite and 14 parts of wollastonite.
[0033] The above aluminum alloy smelting covering agent includes the following preparation steps:
[0034] (1) Soak the above weight parts of wollastonite and aluminum oxide with 10% sulfuric acid for 6 hours, wash with deionized water, then soak with 11% sodium hydroxide solution for 7 hours, and then wash with deionized water until neutral , Then calcined at 700℃ for 2 hours, broken into pieces with a particle size of 1~3mm;
[0035] (2) Add the above mass parts of boron carbide, silica sand, and nano-ceramics to 1.2g / L potassium permanganate solution to soak to remove impurities, then filter and wash to neutral, calcined at 400~450℃ for 2 hours ,...
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