Continuous liquid supply device and application method for preparing large-size long slabs of magnesium alloy

Abstract

The invention discloses a continuous liquid supply device for manufacturing a magnesium alloy long flat ingot with a large specification and a using method. The continuous liquid supply device comprise a power device, an electricity control box, liquid guide pipes, a standing furnace and a crucible, wherein the liquid guide pipes are of a single body structure or a T-shaped structure, a fixing lifting hook is arranged above a material discharging port of the liquid guide pipes, the fixing lifting hook is hung on a cross beam through claw hooks, and the cross beam is fixed on supporting frames;the two electrodes of a power supply of the electricity control box are correspondingly connected with the upper portion of the material discharging port of the liquid guide pipes and an electrode plate; the using method comprises the following steps that the electricity control box is started to control the electrifying of the opposite direction electrode plate and the material discharge port ofliquid guide pipes to heat the liquid guide pipes; the power device is started, an alloy melt is conveyed to a crystallizer through the liquid guide pipes; casting is started; and when the liquid level of the alloy melt leaves a graphite carbon rod, the power device is turned off. According to the device and the method, the continuous liquid supply device for manufacturing the magnesium alloy long flat ingot with large specification and the using method can meet production and manufacturing of magnesium alloy cast ingots with different specifications, the continuous liquid supply of a large-volume melt can be realized.

Description

technical field [0001] The invention belongs to the technical field of magnesium alloy casting, and in particular relates to a continuous liquid supply device and a use method for preparing large-size long slabs of magnesium alloy. Background technique [0002] DC (Direct Chilling) casting, that is, semi-continuous casting, has a series of advantages such as low production cost and high productivity, and is currently the main method for producing magnesium alloy round ingots and flat ingots in industry; The body is continuously and stably solidified into an ingot; with the continuous improvement of the quality requirements of the ingot in the industry, on the basis of DC casting, people have developed a series of improved DC casting methods, such as hot top casting to improve surface quality, gas casting Membrane casting, steam slip casting, low liquid level casting and more. [0003] In order to ensure the size and mechanical properties of large-scale deformed material com...

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Problems solved by technology

[0004] In addition, whether it is the traditional DC casting method or the improved DC casting method, it is inevitable that there will be solidification of the melt in an unsteady state at the beginning and end of casting, and the metallurgical quality at both ends of the ingot is poor. It must be removed by machining before processing, and then it can only be treated as waste, which not only greatly reduces the yield of the ingot, but also wastes resources; Improve the yield of qualified products; for slab casting for wide-width coil rolling, due to the difficulty in realizing strip connection through online welding, the re-rolling of large coils depends on the length of the slab; for the melting furnace capacity ( Generally speaking, for large aluminum alloy melting and casting (20-50 tons), it can fully meet the requirements of continuous liquid supply for long ingot casting of deformed blanks with large cross-sections, but only smaller melting furnaces can be used for process safety. (The capacity is less than 3 tons) for the semi-continuous casting of magnesium alloys for smelting, the continuity and stability of liquid supply for large-scale long ingot casting are the main technical obstacles that must be overcome

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