The invention relates to an upcast method for producing a high-purity bright
copper rod. The method comprises the following steps of:
drying smelting copper raw materials needed by
smelting, mixing, adding the mixture into a
smelting furnace, and covering firing
charcoal with the thickness of between 100 and 150mm on starting molten
copper until red copper is entirely molten, wherein molten copper constantly flows toward a heat preservation furnace under the action of fluid force; boiling the high-temperature molten copper and degassing before
ingot guiding, adding prepared high-purity
graphite carbon
powder onto the liquid level of the molten red copper in the heat preservation furnace, and aerating high-purity
nitrogen at the position which is 50 to 100mm lower than the liquid level of the heat preservation furnace; covering the firing
charcoal after boiling and degassing, covering a furnace cover, performing draw
casting operation, drawing a draw
casting machine for draw
casting bythe upcast method, cooling in a
graphite crystallizer by the upcast method to obtain a qualified high-purity
oxygen-free copper rod blank, and winding on a drawn cast
ingot passive
winding machine; and performing multi-pass rolling and fine-drawing on the high-purity
oxygen-free high-brightness copper rod blank by an eight-rack rod cold
rolling mill, and drawing the blank until the copper rod is obtained by a
wire drawing machine, namely obtaining a finished product after the copper rod passes the inspection.