Sodium-free flux and process for treatment of molten aluminum alloy with the same
A technology of aluminum alloy and molten metal, which is applied in the field of processing molten aluminum by injecting flux into a rotary degassing device to achieve uniform dispersion, high slag removal effect, and maintenance of slag removal effect
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[0042] 〔Evaluation test of flux adhesion and deposition〕
[0043] Using fluxes within and outside the composition range of the present invention to process molten aluminum alloys through flux injection into a rotary degasser to evaluate flux adhesion and deposition at the bottom of the rotor.
[0044] The components of the fluxes used are shown in Table 1. Fluxes A and B are inventive examples with components within the scope of the present invention, and fluxes C to I are comparative examples with components outside the scope of the present invention.
[0045] The composition (mass %) of each flux of table 1
[0046]
[0047] 230 kg of molten AC4C alloy was placed in a holding furnace at 740 °C. In this state, the molten metal was processed by injecting the rotary degasser with a flux rotating in one direction at a speed of 300 rpm. In the first stage, a flux of a predetermined composition at a feed rate of 40 g / min and nitrogen at a flow rate of 30 L / min were simultane...
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