Copper and copper alloy casting equipment under protection of nitrogen

Abstract

The invention discloses copper and copper alloy casting equipment under the protection of nitrogen. The equipment comprises a crystallizer assembly, and a secondary water cooling device and a casting well which are positioned below the crystallizer assembly. The equipment is characterized in that: an airtight protective cover is arranged between the crystallizer assembly and the casting well; the secondary water cooling device is connected to a secondary water cooling-deoxidizing device through a secondary cooling water pipe which is connected with a nitrogen injection pipe and a valve; and the bottom of the casting well is provided with a cooling water return pipe. Under the sealing protection of the nitrogen, outside air is prevented from entering the casting well so as not to contact high-temperature copper ingots in the casting process, the copper ingots are prevented from being oxidized by the air, the surface non-oxidation casting of industrial pure copper, high copper and a white copper alloy is realized, and the aims of reducing the oxidation loss of copper metal and production cost are fulfilled.

Description

technical field [0001] The invention belongs to the technical field of metallurgy, and relates to a copper and copper alloy ingot casting equipment with nitrogen protection, which is mainly suitable for ingot casting of copper and copper alloys with a diameter of Φ150mm (or an ingot with an equivalent section) and above. Background technique [0002] The melting temperature of red copper, phosphorus deoxidized copper, oxygen-free copper, silver copper, high copper and white copper alloy is generally between 1120-1350 °C. At high temperatures, the surface of this type of alloy cannot form a dense protective film, and is easily oxidized to form a thick oxide scale, which affects the quality of the ingot and subsequent processing. When producing oxygen-free copper, oxygen can also penetrate into the ingot, affecting the performance of subsequent processed products. At present, basically no protection measures are taken for the outer surface of the ingot during the casting ...

AI Technical Summary

Problems solved by technology

The fifth is that the secondary cooling cannot effectively cool the ingot with a diameter above Φ250mm (or a slab ingot with an equivalent cross-section) to below 185°C (the temperature at which copper begins to oxidize), and the core of the large-scale ingot after secondary cooling The temperature is still high, and the copper ingots exposed to the air will continue to oxidize

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