Upcast method for producing high-purity bright copper rod

Abstract

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.

Description

technical field [0001] The invention relates to a method for producing high-purity bright copper rods by an up-drawing method, which is applied in the field of non-ferrous metal processing, is suitable for producing bright copper rods by the up-drawing method, and is also applicable to the oxygen removal process in other metal up-drawing methods. Background technique [0002] Oxygen-free copper (generally copper products with an oxygen content below 20PPm) is widely used in the production and manufacture of electronics, electrical engineering, and electrical devices due to its good electrical and thermal conductivity. Oxygen-free copper materials are used for high-frequency launch tubes, transition tubes, magnetrons, vacuum switch tubes and other products of electric vacuum devices. Since electric vacuum devices are sealed in hydrogen during the manufacturing process, there are very strict regulations on the control of oxygen content in copper. Zhongtian Alloy Technology Co...

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Problems solved by technology

[0012] 1: The requirements for raw materials are very high, and the quality of the electrolytic copper used is extremely high. Except for the imported intellectual CCC copper, the domestic Yunye, and the cathode copper of Guiye, the quality of the electrolytic copper of other manufacturers is unstable, and it is difficult to control from the raw materials. Oxygen content

[0013] 2: Electrolytic copper needs to be removed from the copper bean and trimmed. The labor intensity of the workers is high, there are many safety hazards, and the labor efficiency is low.

[0014] 3: The process waste in the workshop cannot be smelted again, and can only be exported at a low price, resulting in capital loss

[0015] 4: The process of inserting and restoring wood used in the old process consumes a large amount of pine wood, which deteriorates the working environment and pollutes the environment

[0016] 5: The holding furnace is covered with graphite flakes. Although it can prevent secondary oxygen absorption, the deoxygenation effect is not good

[0018] 6: The most important point is that the oxygen content cannot meet the international standard below 10PPM. The copper rods produced can only be ordinary anaerobic rods, and high-purity bright anaerobic rods cannot be produced.

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