FIELD: metallurgy.
SUBSTANCE: invention relates to a method for producing silumins using amorphous silica as a source of silicon. The method includes using amorphous silica produced from the dust of the gas purification systems of electrothermal furnaces as a silicon component, introducing a silicon-containing charge directly into the aluminum melt, wherein preliminary preparation of the silicon-containing charge is first conducted, including the transfer of the amorphous silica to the crystalline phase by reactions in solid phases at a temperature of 800°C using finely dispersed aluminium powder as a recovering agent, then the prepared charge is introduced into the aluminium melt under a layer of a low-modulus cryolite subsequently drained for reuse.
EFFECT: production of hypoeutectic, eutectic and hupereutectic silumins complying with the requirements of GOST 1583–93, with a fine grain structure and increased mechanical properties is provided due to the use of micro- and nanodispersed particles of recovered silica as raw materials for producing silumins in an electrolyser or in a casting ladle immediately prior to pouring into a mixer with minimal power consumption.
1 cl, 2 tbl, 1 dwg, 4 ex
Title | Year | Author | Number |
---|---|---|---|
METHOD OF PRODUCING SILUMINS IN ELECTROLYSIS CELL FOR PRODUCING ALUMINIUM | 2020 |
|
RU2736996C1 |
METHOD OF PRODUCTION OF ALUMINIUM-SILICON ALLOY IN ELECTROLYTIC CELL FOR PRODUCTION OF ALUMINIUM | 2008 |
|
RU2383662C2 |
METHOD FOR PRODUCTION OF ALUMINIUM-SILICON ALLOY IN ELECTROLYZER FOR ALUMINIUM PRODUCTION | 1992 |
|
RU2037569C1 |
METHOD FOR MODIFICATION OF ALUMINIUM ALLOYS | 1992 |
|
RU2016112C1 |
METHOD FOR PRODUCING ALUMINIUM FROM ITS OXIDE | 2000 |
|
RU2163268C1 |
METHOD OF OBTAINING SILUMIN | 2018 |
|
RU2683176C1 |
METHOD OF PREPARING OF ALUMINIUM-SILICON ALLOY IN ELECTROLYZER FOR ALUMINIUM PRODUCTION | 0 |
|
SU1826998A3 |
MODIFICATION METHOD OF ALUMINIUM AND ALUMINIUM-SILICONE ALLOYS (SILUMINS) BY CARBON | 2013 |
|
RU2538850C2 |
METHOD OF PROCESSING SILUMINE SLAGS | 0 |
|
SU885310A1 |
METHOD FOR PRODUCTION OF SILUMIN | 1993 |
|
RU2065510C1 |
Authors
Dates
2021-09-08—Published
2020-10-20—Filed