Preparation method of aluminum-scandium intermediate alloy, aluminum-scandium intermediate alloy and aluminum-scandium alloy
An intermediate alloy and aluminum alloy technology, applied in the field of aluminum alloy, can solve the problems of slow reaction speed, lower scandium yield, prolong production cycle, etc., achieve semi-continuous production, rapid reduction reaction, and improve production efficiency
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[0031] It can be seen from the background technology that the production cycle of the existing aluminum-scandium master alloy is long and the production efficiency is low. The inventors of the present invention conducted research on the above problems and proposed a method for preparing an aluminum-scandium master alloy. The preparation method comprises the following steps: adding a scandium-containing compound and an aluminum-containing raw material into a first reactor for thermal reduction reaction to form a liquid aluminum-scandium master alloy, the aluminum-containing raw material comprising aluminum and / or an aluminum alloy; adding the liquid aluminum-scandium The master alloy is added to the second reactor filled with molten salt for extracting slag treatment, and the density of the molten salt is lower than the density of the liquid aluminum-scandium master alloy; and the liquid aluminum-scandium master alloy obtained after the slag extraction is cooled and solidified to ...
Embodiment 1
[0047] This embodiment provides a method for preparing an aluminum-scandium master alloy comprising the following steps:
[0048] First, 35g of Sc 2 o 3 , the Ca of 20g and the Al of 980g are placed in the first tungsten crucible; Then, adopt electric frequency induction heating to 950 ℃ of insulations and react for 10 minutes; KF, CaCl 2 and AlF 3 ) of the second tungsten crucible for slag extraction, and the NaF+KF in the molten salt: CaCl 2 : AlF 3 The mass ratio of the molten salt is 13:11:8, the temperature of the molten salt is 1200°C, mechanical stirring is applied during the slag extraction process, and the liquid aluminum-scandium master alloy is deposited on the bottom of the crucible after 10 minutes of extraction slag separation; finally, The liquid aluminum-scandium master alloy was produced by siphon method, and 974g of aluminum-scandium master alloy was obtained after cooling, and the Sc content of the aluminum-scandium master alloy was 2.17%, the yield of ...
Embodiment 2
[0050] This embodiment provides a method for preparing an aluminum-scandium master alloy comprising the following steps:
[0051] First, 35g of Sc 2 o 3 , 1000g of Al is placed in the first tungsten crucible; then, adopt electric frequency induction to heat to 950 ℃ for 10 minutes and react; 2 and AlF 3 ) of the second tungsten crucible for slag extraction, and the NaF+KCl in the molten salt: CaCl 2 : AlF 3 The mass ratio of the molten salt is 13:2:10, the temperature of the molten salt is 1200°C, mechanical stirring is applied during the slag extraction process, and the liquid aluminum-scandium master alloy is deposited on the bottom of the crucible after the slag is separated for 10 minutes; finally, The liquid aluminum-scandium master alloy was produced by siphon method, and 972g of aluminum-scandium master alloy was obtained after cooling, and the Sc content of the aluminum-scandium master alloy was 2.18%, the yield of Sc was 92.9%, and the mass fraction of Al+Sc was 9...
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