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Device for trapping hydrogen

A technology of degassing device and circulation device, which is applied in the field of quantitative devices

Pending Publication Date: 2022-01-28
CONSTELLIUM ISSOIRE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

It also requires bulky and expensive equipment to maintain (poche d’aluminium liquide, injection rotors, pressurized gas equipment, etc.)

Method used

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  • Device for trapping hydrogen
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  • Device for trapping hydrogen

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0056] For the study of liquid metals with passage through ceramic exchangers such as figure 2 The exchange kinetics between the cycle gases used in the configuration of ), the following experiments were carried out.

[0057] 10 kg of an aluminum alloy of type AG5 - consisting of 5% magnesium and 95% aluminum and 5 ppm beryllium - was melted in a graphite clay crucible at a temperature of about 700°C. With the help of a pressure regulator, the industrial argon gas can be used at a flow rate of D Ar Circulation through an exchanger submerged in liquid metal at a regulated pressure of 1.2 bar.

[0058] The exchanger is a porous material made of SiC ceramic foam. Two geometries were tested; the first exchanger had dimensions 50x50x25mm and an apparent exchange surface area of ​​87.5cm 2 , while the second exchanger has dimensions of 100x100x25mm and an apparent exchange surface area of ​​275cm 2 . The SiC ceramic foam is drilled to introduce stainless steel tubes for argon ...

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PUM

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Abstract

Device for degassing liquid metal comprising an enclosure containing a bath of liquid metal, a device for circulating a gas through a purification chamber and in that the purification chamber comprises a getter material configured to trap the dihyrogen of the circulating gas. Method for degassing a bath of liquid metal in order to reduce the hydrogen concentration of the liquid metal, comprising the following steps a) producing a bath of liquid metal, preferably an aluminum alloy, b) circulating a gas, c) exchanging hydrogen from the circulating gas with the liquid metal so that the hydrogen dissolved in the bath of liquid metal diffuses into the circulating gas and enriches the circulating gas in dihydrogen, d) purifying the circulating gas enriched in dihydrogen in a purification chamber comprising a getter material configured to trap the dihydrogen of the circulating gas.

Description

technical field [0001] The present invention relates to a device allowing to reduce the amount of dissolved hydrogen in a liquid metal bath by using a hydrogen trap. It also discloses a method that allows reducing the amount of dissolved hydrogen in the liquid metal bath. The invention also relates to the use of such a device in a device for casting liquid metals, especially aluminum alloys. Background technique [0002] Hydrogen is a gas that is soluble in metals, especially iron, titanium and aluminum. [0003] In aluminum, hydrogen is the only soluble gas. The maximum dissolved hydrogen concentrations of liquid aluminum and solid aluminum differ by an order of magnitude. Therefore, too much hydrogen dissolved in the liquid aluminum alloy can lead to the formation of pores during solidification. [0004] In order to reduce the hydrogen content in the liquid metal, metal casting is usually carried out under a protective atmosphere, for example under argon, and / or the li...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F27D3/16C21C7/072C22B9/05C22B21/06C22B34/12
CPCF27D3/16C22B9/05C21C7/072C22B34/1295C22B21/064
Inventor J·普里哲P·扎瑞P·勒布龙
Owner CONSTELLIUM ISSOIRE
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