What is the chemical composition of the admixture of cast aluminum, the refining agent (slag, degassing) and so on?
Aluminum alloy cover and scouring, so that the metal liquid and furnace gas isolation, to prevent oxidation, evaporation, suction. Remove the metal liquid impurities, with the role of thermal desulfurization. Refining principle reaction is as follows: the use of the main components NaNO3, graphite The reaction is as follows: NaNO3 + C → NaCO3 + N2 ↑ + CO2 ↑ 380 (2) The reaction is carried out under the following conditions: NaNO3 + C → NaCO3 + N2 ↑ + CO2 ↑ 380 ℃, NaNO3 → Na2O + NO ↑ after the reaction of N2, NO, CO2 gas on the human body and the environment are no corrosion stimulating effect, the refining effect is also good, refining temperature of 690-720 ℃, refining time is 5-12min rest time 5-8 min.
