Oxygen-free copper rod mold

Abstract

The invention relates to an oxygen-free copper rod mold. The oxygen-free copper rod mold comprises an integrated graphite die, the integrated graphite die comprises a large-diameter cylindrical section, a conical section and a small-diameter cylindrical section which are sequentially arranged, a cavity is formed in the large-diameter cylindrical section, a boss is arranged in the cavity, an external thread is arranged at the top of the boss, a through hole is formed in the boss, and the through hole extends downwards to communicate the conical section with the small-diameter cylindrical section. According to the oxygen-free copper rod mold, the large-diameter cylindrical section, the conical section and the small-diameter cylindrical section are integrally formed without gaps, refractory mortar is not used for filling the gaps, long-time baking does not need, slagging is not likely to happen in molten copper, and meanwhile cracks and gaps are prevented from being generated in a primarycooling area, namely an external thread connector, of a mold body, Due to arrangement of the conical section, when the mold is inserted into the heat preservation furnace, a copper liquid surface covering agent graphite phosphorus sheet cannot be brought into the furnace, and meanwhile furnace slag in the furnace is not prone to gathering and slagging below the large-diameter cylindrical section,and the double-row liquid flow holes greatly improve the yield and the production efficiency, and the quality of the copper rod is ensured.

Description

technical field [0001] The invention relates to the technical field of continuous casting of copper alloys, in particular to an oxygen-free copper rod crystallizer. Background technique [0002] Oxygen-free copper rods are mainly produced by upward continuous casting. At present, when copper alloy continuous casting is upward, such as Figure 6-8 As shown, the crystallizer is assembled with a cylindrical graphite protective sleeve and a graphite mold. The upper end of the graphite mold is inserted into the cylindrical graphite protective sleeve. The cylindrical graphite protective sleeve and the graphite mold are matched. The gap between the two is filled with resistant cement 6. The following defects: 1. The crystallizer is not evenly baked and cannot be completely baked and dried; 2. When the copper liquid is inserted into the furnace body, the copper liquid splashes and hurts people, which is not safe; 3. The cylindrical graphite protective cover has a round flat bottom an...

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Problems solved by technology

[0002] Oxygen-free copper rods are mainly produced by upward continuous casting. At present, when copper alloy continuous casting is upward, such as Figure 6-8 As shown, the crystallizer is assembled with a cylindrical graphite protective sleeve and a graphite mold. The upper end of the graphite mold is inserted into the cylindrical graphite protective sleeve. The cylindrical graphite protective sleeve and the graphite mold are matched. The gap between the two is filled with resistant cement 6. The following defects: 1. The crystallizer is unevenly baked and cannot be completely baked and dried; 2. When the copper liquid is inserted into the furnace body, the copper liquid splashes and hurts people, which is unsafe; 3. The cylindrical graphite protective cover has a round flat bottom and is easy to cover the surface 4. The rubbish brought to the lower copper liquid will be filled with the mold and the protective cover, and the refractory mud will react quickly, slagging, and gather at the bottom of the protective cover; 5. Cause cracks and cracks in the primary cooling zone of the crystallizer, that is, the external thread interface of the graphite mold, which seriously affects the internal quality of the upper guide rod; 6. Reduce the life of the upper guide mold; to the inside of the copper rod; 8. The single row of liquid flow holes on the graphite cap reduces the flow of copper liquid, lowers the drawing speed, reduces output, and lowers production efficiency; The copper liquid is viscous and the flow rate is slow, so it cannot completely fill the primary cooling zone of the graphite mold of the crystallizer, which affects the quality of the copper rod

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