Magnesium alloy furnace material fluxless remelting refining method and device

A magnesium alloy and flux-free technology is applied to the field of a flux-free remelting refining method for magnesium alloy charge and its device, which can solve problems such as clogging of a filter device and achieve the effect of improving refining efficiency.

Active Publication Date: 2007-09-19
重庆硕龙科技有限公司
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Problems solved by technology

[0005] The purpose of the present invention is to address the deficiencies in the prior art, and provide a magnesium alloy furnace charge flux-free remelting refining method and its device. The equipment / device developed by this method can realize the compound multi-stage refining and continuous refining of magnesium melt. Casting / production, and solve the clogging problem of the filter device in the filtration, improve the refining quality and purification efficiency of the magnesium alloy charge, and for the magnesium alloy waste, also make the performance of the regenerated magnesium alloy reach the standard of the new magnesium alloy material

Method used

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  • Magnesium alloy furnace material fluxless remelting refining method and device

Examples

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Embodiment 1

[0034] Put the preheated and dried die-casting AD91 magnesium alloy scrap into a crucible with a temperature of 680-800°C to melt, seal the crucible and use CO 2 and SF 6 Mixed gas protection, after the melting is complete, use mechanical stirring and blowing gas to refine the magnesium melt for 10 minutes, and the flow rate of argon gas is controlled at 0.15m 3 / h, the gas purity is 99.9%, the distance from the stirring head for stirring and refining to the bottom of the crucible is about 400mm, then stop stirring and blowing for refining, continue to feed the material to the forward processing chamber, stop the feeding, wait for the melting to complete, stir and blow Refining for 10 minutes, this cycle is carried out; there are 2 filter chambers in the crucible, each filter chamber is equipped with a first-level filter mechanism, the apertures are 3mm and 1.5mm, and the corresponding filter orifice is clamped with the direction of the melt flowing into the filter orifice. T...

Embodiment 2

[0036] Put the preheated and dried AM50 magnesium alloy waste into the refining device of Example 1, and its corresponding technical parameters are: use mechanical stirring and refining, the distance from the stirring head for stirring and refining to the bottom of the crucible is about 100 mm, and the stirring and refining time is about 100 mm. 30min, the melt was left in the pouring chamber for 80min and then came out of the furnace for continuous pouring, and its technical parameters were the same as in Example 1. The analysis result of the sample shows that the tensile strength of the sample reaches above 191MPa, and the elongation reaches 8.5%, reaching the standard of new magnesium alloy material.

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Abstract

The invention relates to a method of refusion refining for magnesium alloy furnace charge without the fluxing agent and its apparatus. Magnesia fused mass is refined using complex multi-refining method after preheating and drying magnesium alloy furnace charge, including the steps of: fusing furnace charge, stirring refining or (and blowing refining), forced sedimentating, filter refining, static refining, discharging and casting, accordingly the high-quality purification of fusing body is performed by efficiently eliminating all kinds of impurity and gas in the magnesium alloy furnace charge. The apparatus mostly includes crucibles, pretreatment chambers in order fixed in the crucibles, one or more filter chamber and casting chambers, each adjacent two chambers communicated by fused mass flowing channels, stirring units or (and blowing units) in the pretreatment chambers, first-order filter unit airproofed and fixed in each filter chamber. The apparatus can perform continuous complex multi-refining and casting / producing of magnesia fused mass, with greatly-improved refining quality and purified effect of magnesium alloy fused mass, while the problem that the filter apparatus is easy to be blocked in the process of filtering is solved.

Description

technical field [0001] The invention relates to a magnesium alloy charge remelting and refining method and a device thereof, in particular to a magnesium alloy charge remelting and refining method without flux and a device thereof, belonging to the field of light metal smelting and processing thereof. technical background [0002] In recent years, with the rapid development of the magnesium alloy industry and the wide application of magnesium alloy products, higher and higher requirements have been put forward for the purity of magnesium and magnesium alloys. At the same time, the types and quantities of magnesium alloy scraps are also increasing rapidly. How to improve Magnesium alloy refining effect and treatment, recycling of magnesium alloy waste has become an important issue for the sustainable development of the magnesium industry. broad attention to. [0003] In terms of magnesium alloy waste recycling, Hydro company has developed a "magnesium alloy charging regenera...

Claims

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Application Information

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IPC IPC(8): C22C1/02C22C23/00
Inventor 龙思远孙继云查吉利
Owner 重庆硕龙科技有限公司
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