A kind of method for preparing oxygen-free copper rod
An oxygen-free copper rod and copper bean technology, which is applied in manufacturing tools, heat treatment equipment, cable/conductor manufacturing, etc., can solve the problems of poor product grade, low yield rate, low comprehensive performance, etc., achieve low oxygen content and improve electrical conductivity , the effect of high conductivity
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Embodiment 1
[0035] Example 1: An oxygen-free copper rod with a diameter of 10 mm was prepared.
[0036] Step 1, raw material preparation
[0037] The raw material is high-purity cathode copper, and the surface is required to be smooth and copper-free. Ultrasonic (frequency 1-5MHz, time 30 minutes) is used to clean the surface patina and other attachments. At the same time, heat the cathode copper at 100°C for at least 2 hours for preheating and drying treatment, so as to eliminate the impurities that may be brought in by the cathode copper.
[0038] The auxiliary raw material is flake graphite (60-100 mesh). Specifically, commercially available graphite powder and calcium carbide block with a size of no more than 3 cm are placed in a drying oven at 200°C, kept for 12 hours, and then dried. To eliminate moisture and dehumidification on the surface, ready for use.
[0039] Step two, smelting,
[0040] Put the cathode copper processed in step 1 into the smelting furnace, and cover it with...
Embodiment 2
[0047] Example 2: An oxygen-free copper rod with a diameter of 30 mm was prepared.
[0048] Step 1, raw material preparation
[0049] The raw material is high-purity cathode copper, and the surface is required to be smooth and copper-free. Ultrasonic (frequency 1-5MHz, time 30 minutes) is used to clean the surface patina and other attachments. At the same time, heat the cathode copper at 150°C for at least 3 hours for preheating and drying treatment, so as to eliminate the impurities that may be brought in by the cathode copper.
[0050] The auxiliary raw material is flake graphite (60-100 mesh), specifically put the commercially available graphite powder and the pure aluminum block and titanium block with a size of no more than 3 cm into a drying oven at 250°C, keep it warm for 20 hours, and then dry it. Dry treatment to eliminate moisture and dehumidification on the surface, ready for use.
[0051] Step two, smelting,
[0052] Put the cathode copper processed in step 1 in...
Embodiment 3
[0059] Example 3: An oxygen-free copper rod with a diameter of 50 mm was prepared.
[0060] Step 1, raw material preparation
[0061] The raw material is high-purity cathode copper, and the surface is required to be smooth and copper-free. Ultrasonic (frequency 1-5MHz, time 30 minutes) is used to clean the surface patina and other attachments. At the same time, heat the cathode copper at 200°C for at least 4 hours for preheating and drying treatment, so as to eliminate the impurities that may be brought in by the cathode copper.
[0062] The auxiliary raw material is flake graphite (60-100 mesh), specifically put commercially available graphite powder and manganese-silicon alloy with a size of no more than 3 cm into a drying oven at 300°C, keep it warm for 24 hours, and then dry it. To eliminate moisture and dehumidification on the surface, ready for use.
[0063] Step two, smelting,
[0064] Put the cathode copper treated in step 1 into the smelting furnace, and cover it w...
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