Preparation technique of aluminum-silicon alloy
A technology of aluminum-silicon alloy and aluminum liquid is applied in the field of preparation of aluminum-silicon alloy, which can solve the problems of partial silicon segregation, easy growth, and long melting time.
Inactive Publication Date: 2011-08-24
CITIC DICASTAL
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Problems solved by technology
For the aluminum liquid produced in this way, the temperature of the aluminum liquid is higher than 850°C, and the melting time is long. After the silicon is dissolved in the aluminum liquid, it is easy to grow up, resulting in a coarse silicon phase; because the stirring is not sufficiently uniform, the distribution of silicon dissolved in the aluminum liquid Uneven, easy to cause local silicon segregation
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[0011] The bottom of the furnace is equipped with air-permeable bricks or an electromagnetic stirrer under the furnace. The temperature of the aluminum liquid to be added with silicon is controlled at 760~770°C, and then the bulk silicon is calculated and weighed before adding the aluminum liquid. The air-permeable bricks are fed with high-purity nitrogen or Argon gas (or electromagnetic stirring) dissolves the silicon block in the molten aluminum. The aluminum liquid prepared in this way has a fine and uniform silicon phase and is evenly distributed. Especially the degassing and stirring effect of the breathable brick makes the aluminum liquid more pure.
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The invention discloses a preparation method of aluminum-silicon alloy. The bottom of a smelting furnace is provided with gas permeable bricks or an electromagnetic stirrer is installed under the furnace; and while the temperature of the liquid aluminum in need of silicon is controlled at 760-770 DEG C, high-purity nitrogen gas or argon gas is introduced into the gas permeable bricks (or electromagnetic stirring is carried out). Silicon blocks are dissolved in the liquid aluminum, so that the silicon phase is fine, and uniformly distributed in the liquid aluminum; and especially due to the degassing stirring action of the gas permeable bricks, the liquid aluminum is more pure.
Description
technical field [0001] The invention relates to a metal smelting process, and specifically designs a method for preparing an aluminum-silicon alloy. Background technique [0002] In the traditional aluminum-silicon alloy production, block silicon is usually placed at the bottom of the furnace, and aluminum ingots are piled on top of it, then heated and melted, and stirred to fully dissolve the silicon into the molten aluminum to achieve the required composition. For the aluminum liquid produced in this way, the temperature of the aluminum liquid is high, greater than 850 ° C, and the melting time is long. After the silicon is dissolved in the aluminum liquid, it is easy to grow up, resulting in a coarse silicon phase; because the stirring is not sufficient and uniform, the silicon dissolved in the aluminum liquid is distributed. Uneven, easy to cause local silicon segregation. Contents of the invention [0003] The object of the present invention is to provide an aluminum...
Claims
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IPC IPC(8): C22C21/02C22C1/02
Inventor 吴群虎
Owner CITIC DICASTAL