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Magnesium alloy twin-roll continuous casting method and device for manufacturing magnesium alloy plate

A technology for plate production and casting equipment, which is applied in the field of magnesium alloy continuous casting methods and equipment, and can solve the problems of inability to use magnesium alloys for smelting and transportation, inapplicability, and harshness.

Inactive Publication Date: 2006-09-20
FUJIAN HUAMEI NEW TECH DEV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The basic problem is that the magnesium alloy liquid is extremely active, easy to oxidize and burn, and it is easy to have violent chemical reactions with almost all refractories used for aluminum alloys. The melting and conveying methods of aluminum alloys cannot be used for melting and conveying magnesium alloys. Casting rolls Lubricants are also not suitable for magnesium alloys, especially for the casting and rolling of magnesium alloys, which have very strict requirements on the material of the feed nozzle. It should have the ability to prevent magnesium alloy liquid from burning, and the existing materials cannot meet the requirements
The heat capacity and latent heat of magnesium alloy are also smaller than that of aluminum alloy, so the control of continuous casting process is relatively difficult

Method used

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  • Magnesium alloy twin-roll continuous casting method and device for manufacturing magnesium alloy plate
  • Magnesium alloy twin-roll continuous casting method and device for manufacturing magnesium alloy plate
  • Magnesium alloy twin-roll continuous casting method and device for manufacturing magnesium alloy plate

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Effect test

Embodiment 1

[0016] The magnesium alloy smelting and heat preservation system adopts double furnaces. The melting furnace 1 uses a resistance furnace or a power frequency furnace to melt the magnesium alloy. The melting temperature can be 740°C. The resistance heat preservation furnace is used to process the magnesium alloy liquid, and the heat preservation temperature can be 720°C. The magnesium alloy liquid is automatically conveyed by a siphon or a pump. The magnesium alloy liquid level control of the front box nozzle adopts automatic and manual dual control devices. As long as the constant height is maintained, the magnesium alloy liquid can be kept at a constant temperature in the front box nozzle, and the constant temperature can be adjusted. It is 720°C.

Embodiment 2

[0018] In the case that the magnesium alloy smelting and heat preservation system adopts a double furnace, a plate-shaped magnesia foam ceramic filter can be used in the heat preservation furnace to divide the magnesium alloy liquid into two parts. The ceramic foam filter is made of pure MgO fired at high temperature, its thickness is 20-40 mm, the porosity is about 85%, and the pore size is 20-40 mesh. The foam ceramic filter can filter the magnesium alloy liquid when it flows through, and can greatly reduce the content of non-metallic impurities in the magnesium alloy liquid. If the ceramic foam filter is expected to have the ability to filter metal impurities at the same time, its composition can be adjusted or the surface of the fired product can be modified.

Embodiment 3

[0020] Under the conditions of Embodiment 1 or / and Embodiment 2, an internal thermoelectric heater or an external heating device with a power of 2 to 5 kilowatts can also be placed in the front box nozzle, and the internal thermoelectric heater can be set according to the required temperature. On-line monitoring with thermocouples, adjusting the temperature of the magnesium alloy liquid through thermocouple sensors and automatic equipment can keep the magnesium alloy liquid at a constant temperature, and the constant temperature can be 720°C to meet the temperature requirements of the casting and rolling process for the magnesium alloy liquid.

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Abstract

A conticasting system with dual Mg-alloy rollers for producing Mg-alloy plate is disclosed. Its technology includes such steps as smelting Mg-alloy, holding temp. delivering to front box with constant temp and level and protecting gas, and flowing in casting-rolling mill. Its apparatus is composed of smelting furnace, temp-keeping heater, delivering system, front box, flowing outlet, casting-rolling mill and shear mechanism. Its advantages are high productivity and high safety.

Description

Technical field: [0001] The invention relates to a magnesium alloy continuous casting method and equipment, in particular to a twin-roll continuous casting method and equipment for producing magnesium alloy plates with various thicknesses. Background technique: [0002] At present, magnesium alloy sheets are basically manufactured by extrusion and rolling. The production process of magnesium alloy plates produced by extrusion and rolling is complicated, the productivity is low, and the production cost is high, which cannot meet the needs of the development of the magnesium industry. It is of great significance to develop the continuous casting technology of magnesium alloy plates with high productivity and low production cost. At present, there is no technology to produce magnesium alloy plates by continuous casting at home and abroad. This type of technology is currently a frontier research and development topic in the world's magnesium industry. [0003] The twin-roll co...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22D11/06B22D21/04
Inventor 李华伦黄育宏
Owner FUJIAN HUAMEI NEW TECH DEV
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