Flux used for recycling magnesium alloy cuttings, and preparation method and application method thereof

An application method and technology of magnesium alloy, applied in the field of magnesium alloy metallurgy, can solve the problems of low recovery rate of magnesium scraps, poor effect, lack of safety and economy, etc., to improve recovery safety, prevent oxidative combustion, combustion and other problems. The effect of reducing the risk of explosion

Active Publication Date: 2012-09-26
有研金属复材技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Although measures such as briquetting magnesium chips, spraying flux during remelting, and using flame-retardant gas protection can improve the combustion of waste chips, the effect is not good in actual use, resulting in a low recovery rate of magnesium chips, lack of safety and economy. sex

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0011] The main composition and mass fraction of the flux are: 10% anhydrous carnallite, 40% magnesium chloride, 40% potassium chloride, 3% magnesium carbonate, and 7% calcium chloride. Mix the above-mentioned ingredients in the form of powder according to the stated ratio, so that several ingredients are completely mixed together to obtain a flux.

[0012] The application method is as follows: mix 2Kg of flux with 200Kg of magnesium-manganese alloy sacrificial anode chips evenly, and then put 1.5 tons into a furnace heated to 985-1020K to heat up with the furnace. After the chips are melted, add raw magnesium ingots to the furnace capacity, and refine according to the normal process And alloying, and then semi-continuous casting of magnesium-manganese alloy ingots. The prepared magnesium-manganese alloy ingot is hot-extruded by a normal process to make a magnesium-manganese alloy sacrificial anode. After weighing and measuring, the recovery rate of magnesium shavings was cal...

Embodiment 2

[0016] The main components and mass fractions of the flux are: 80% anhydrous carnallite, 5% potassium chloride, 0.5% magnesium carbonate, 2% calcium carbonate, 10% sodium chloride, and 2.5% calcium chloride. Grind the above-mentioned ingredients according to the stated ratio and stir them thoroughly, so that several ingredients are completely mixed together to obtain a flux.

[0017] The application method is as follows: mix 1.5Kg of flux with 200Kg of AZ91D magnesium alloy chips evenly, and then put it into a furnace with a capacity of 1.5 tons heated to 973-993K. After the chips are melted, add magnesium ingot raw materials to the capacity of the furnace, and refine according to the normal process And alloying, and then cast into magnesium alloy parts. The recovery rate of magnesium shavings is measured to reach 93%, and the mechanical properties of the obtained parts meet the requirements of the AZ91D magnesium alloy standard, as shown in Table 2.

[0018] Table 2 Properti...

Embodiment 3

[0021] The flux composition and its mass fraction are: 50% anhydrous carnallite, 3% calcium chloride, 10% magnesium chloride, 20% potassium chloride, 1.5% magnesium carbonate, 0.5% calcium carbonate, and 15% sodium chloride. Mix the above-mentioned ingredients in the form of powder according to the stated ratio, so that several ingredients are completely mixed together to obtain a flux.

[0022] The application method is as follows: mix 6Kg of flux with 200Kg of magnesium-manganese alloy sacrificial anode chips, and then put 1.5 tons into a furnace heated to 773-873K to heat up with the furnace. After the chips are melted, add magnesium ingot raw materials to the capacity of the furnace for refining and alloying. Magnesium-manganese alloy ingots are produced by chemical and other follow-up processes.

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PUM

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Abstract

The invention discloses a flux used for recycling magnesium alloy cuttings, and a preparation method and application method of the flux, belonging to the technical field of magnesium alloy metallurgy. The flux mainly comprises anhydrous carnallite, magnesium chloride, potassium chloride, magnesium carbonate and calcium carbonate, the mass percentages of the components are respectively 10-80%, 0-40%, 5-40%, 0.5-3% and 0-2%, and not more than 40% of other components such as sodium chorlode, calcium chloride and the like can be added according to thickness of magnesium cuttings and a heating condition. According to the invention, before the magnesium cuttings enter into a furnace, the magnesium cuttings and the flux are fully mixed, and then are added into a smelting furnace, the flux is smelted and attached on the surface of the magnesium cuttings along with a temperature rise of the furnace, the contact of the surface of the magnesium with gas and oxidization of the surface can be blocked, meanwhile, oxidization and combustion of the magnesium cuttings can be effectively prevented by inflaming retarding gas generated by the flux, and the recovery rate and the production safety of the magnesium cuttings are improved.

Description

technical field [0001] The invention belongs to the technical field of magnesium alloy metallurgy, and in particular relates to a flux for recovering magnesium alloy chips and a preparation and application method thereof. Background technique [0002] Due to the characteristics of low density, high specific strength and specific stiffness, good damping and vibration reduction effect, and excellent machining performance, magnesium alloys are rapidly expanding in the fields of aviation, aerospace, automobiles, home appliances, and communications, and gradually become popular civilian materials. Magnesium alloys will produce a lot of waste chips (magnesium chips) during the machining process. The traditional method of recycling magnesium chips is to directly add magnesium chips to the furnace for remelting. During remelting and refining, due to the high activity of magnesium chips, a large amount of fine particles Oxidative combustion of magnesium chips produces a large amount ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C1/02C22C23/00
Inventor 郑弃非
Owner 有研金属复材技术有限公司
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