Method for protecting crystallizer by nitrogen to reduce loss

Abstract

A method for protecting a crystallizer through nitrogen to reduce loss comprises the following steps that a, nitrogen circulation supply preparation is conducted, specifically, a nitrogen circulation groove is formed in the position, away from an end opening, of the crystallizer, nitrogen inlet holes are evenly distributed in the nitrogen circulation groove, and the nitrogen circulation groove is communicated with the nitrogen inlet holes so that nitrogen can be supplied in a circulation mode; b, cooling water supply preparation: transforming a plurality of water inlets and water outlets of the water jacket into smooth water inlets and water outlets with inclination of 45 degrees and rotating shapes, so that the cooling water flows smoothly and uniformly for cooling; c, the copper sleeve is formed in a liquid-to-solid state, high-pressure cooling water is arranged outside the copper sleeve, and high-temperature copper water is arranged inside the copper sleeve; the inner hole of the high-temperature-resistant graphite gasket of the mold body is reduced, so that the heat insulation area of the copper sleeve at the heat insulation end is increased, the sealing and heat insulation effects are realized, and the copper sleeve is effectively protected to reduce the loss of the crystallizer. The method is high in work efficiency, effectively enlarges the heat insulation area of the copper sleeve at the heat preservation end and effectively protects the copper sleeve; and the cooling is smooth and uniform, the surface of the pipe blank is smooth, the cost is saved, and the quality and casting efficiency are improved.

Description

technical field [0001] The invention relates to a method for protecting a crystallizer with nitrogen to reduce losses. Background technique [0002] During the production of copper liquid crystallization process, the open-draw furnace often replaces the graphite crystallizer, resulting in high cost of use of the crystallizer, short life, low production efficiency, the mold is easily broken and the assembly sealing is not good, the copper sleeve is easy to melt, deform, and cool. There will be a small amount of water leakage and gasification, which will shorten the life of the mold; the angle of the nozzle is not too straight, resulting in the blocking of the cooling water when casting the tube blank, the cooling is not complete, and the tube blank is prone to quality problems such as cracks, roughness, and scarring. The cooling water inside is not smooth and uneven; therefore, we have developed a method to protect the crystallizer with nitrogen to reduce losses. SUMMARY OF...

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Problems solved by technology

[0002] During the production of the copper liquid crystallization process, the graphite crystallizer is often replaced in the flat induction furnace, resulting in high cost of use, short life, low production efficiency, easy breakage of the mold, poor assembly and sealing, and easy melting and deformation of the copper sleeve. There will be a small amount of water leakage and gasification, which will shorten the life of the crystallizer; the angle of the nozzle is not too straight, causing the cooling water to be blocked when casting the billet, the cooling is not complete, and the billet is prone to quality problems such as cracks, roughness, and scarring. The flow of cooling water inside is not smooth and uneven; therefore, we have developed a method to protect the crystallizer with nitrogen to reduce loss

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