Flat Iron Hair,Heat Styling Brush,Blow Dryer Brush,Hair Brush Blow Dryer Shenzhen Unitepin Tech Co.Ltd , https://www.rifnylife.comSome crude gold produced by mines or factories is no longer purified and sold directly, so it is necessary to smelt the ingots. The operation is basically the same as that of the finished gold spindle, but the amount of flux and oxidant added should be greatly increased. After the slag is formed, the ingot is generally cast in a horizontal mold. After the ingot was poured condensed asbestos board, excluding storage flash burr.