Oxidative refining example

After addition of copper bismuth solution heated to 680 ~ 750 ℃, bubbling air, arsenic, antimony oxide volatilization, the operating time according to the crude arsenic, bismuth, antimony content may be, typically 4 to 12 hours, until thin white smoke When the lead oxide residue appears on the surface of the sputum, it is the end point of arsenic and antimony. In the operation, if the slag covers the liquid surface, it can be taken out as appropriate to avoid affecting the volatilization of the gas. When the slag is diluted, a small amount of solid alkali or chaff or wood chips can be added to make the slag dry and facilitate the slag. In addition to the amount of arsenic and antimony oxide slag, it is about 4% to 8% of the weight of the material. The oxidized slag composition is listed in the table below.

Table Oxidation refining slag composition (%)

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