... reduce surface oxidation of liquid zinc dross, so we must use small thermal conductivity, high melting point, specific ... addition to iron function and antioxidant function and use react not only reduce heat separated and ... 480 ~ 510 °C. zinc pot material possible use of carbon-containing, low silicon content of the ... allow more than 4g / l, PH value is always maintained at 4.5-5.5. heating, heating ...