Copper-plating-free air-gouging carbon bar and process method thereof
A process method and technology of carbon rods, which are applied in the field of non-copper-coated gouging carbon rods and the improvement of the process method, can solve the problems of easy cutting of the end face of the tail, unstable quality of the cut part, and large contact area of the head end face, etc. problems, to avoid pollution and damage to the human body, improve antioxidant performance, and improve the effect of surface finish
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[0017] A kind of non-copper-coated gouging carbon rod process method, the materials are as follows by weight: 45% pitch coke, 20% artificial graphite powder, 5% anti-oxidation additive, and 30% pitch;
[0018] (1) After stirring and kneading the above materials, enter the extruder to extrude into a rod shape with a central hole 2; the diameter of the rod is 8mm, and the diameter of the central hole is 2mm; one piece is extruded in 1 / 2 second; each piece is 300mm long;
[0019] (2) Enter the roasting furnace and roast at a temperature of 1200-1300 °C for 7-8 days;
[0020] (3) Turn off the power to the roaster and keep it warm in the roaster for 6-7 days; open the roaster and cool down naturally for 5-7 days; the specific gravity of the bar is 1.56-1.62;
[0021] (4) Machining the formed rod, the head is a cone 3, the taper is 1:50, and the end face of the tail is chamfered 45°×1.5; after machining, it becomes a non-copper-plated gouging carbon rod 1, The diameter accuracy of ...
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