Sampling method of liquid metal and device thereof

Abstract

This invention discloses one method and device to extract metal sample in different parts of capacitor, which comprises the following steps: setting sample gas path, sample take chamber and filter device in the system; sample take gas path down end is connected to filter device and sample take sample with top end connected to inertia gas and vacuum system; injecting inertia gas in the path to generate micro pressure; then through switching sample gas pressure as negative one and to absorb sample liquid to materials chamber; the sample chamber is to extract analysis device interface with otherend injected to the inertia gas to flow out the liquid sample.

Description

technical field

[0001] The invention relates to a liquid metal sampling method and an application device thereof, more specifically a method suitable for accurately extracting liquid metal samples from different parts of a container and an application device thereof. Background technique

[0002] In scientific research and actual production, it is often necessary to extract samples from different depths or positions in containers such as crucibles containing liquid metal for composition, inclusion or gas content analysis. The usual practice is to use a spoon or other sampler to reach into the crucible and sample directly in that part. The disadvantage of this method is that during the scooping process, oxygen is directly brought into the crucible by the spoon or other samplers, causing metal oxidation, and it may also cause other parts of the liquid to mix with the liquid in the spoon, which cannot guarantee the quality of the scooped. In addition, because the density of th...

Examples

specific Embodiment example 1

[0027] A specific implementation example 1 is given below: sampling of liquid aluminum alloy in a crucible.

[0028] Iron is an impurity in cast aluminum alloys. In order to find out the content of iron in the depth direction of the crucible, it is necessary to take samples at different depths of the crucible. In this example, the depth of the liquid aluminum alloy in the crucible is 800 mm, and the alloy composition is Si: 7%, Mg: 0.3%, and the rest is Al. It is desired to measure the content (percentage by weight) of iron along the depth direction after being kept at 730° C. for 10 hours.

[0029] Sampling is carried out according to the following steps (refer to figure 1 ):

[0030] 1. Heat the sampling chamber 1 to 750°C. (Reason: In order to prevent the liquid aluminum alloy from being affected after the sampling chamber is immersed in the crucible.)

[0031] 2. Open the inert gas valve 4 and adjust the flow rate so that a small amount of nitrogen gas is blown out fro...

Embodiment example 2

[0039] Implementation Case 2: Sampling of density distribution of coatings for precision casting.

[0040] Coatings for precision casting are made by mixing powdery refractory materials, silica sol solution and a small amount of defoamer. The prepared coating should have uniform density. However, in the process of use, powder settlement will inevitably occur, so the coating on the upper part of the container is thinner and less dense; while the coating on the lower part of the container is thicker and denser. As a result, the process is unstable and affects product quality. In order to control the process, it is necessary to know the change of the coating density of each part of the container with time, and it is necessary to take samples for testing. The formula of coating is as follows (percentage by weight):

[0041] Silica sol: 22%; zircon powder: 78% plus a small amount of wetting agent and defoamer according to the situation.

[0042] Sampling is carried out accordin...

technical field

[0001] The invention relates to a liquid metal sampling method and an application device thereof, more specifically a method suitable for accurately extracting liquid metal samples from different parts of a container and an application device thereof. Background technique

[0002] In scientific research and actual production, it is often necessary to extract samples from different depths or positions in containers such as crucibles containing liquid metal for composition, inclusion or gas content analysis. The usual practice is to use a spoon or other sampler to reach into the crucible and sample directly in that part. The disadvantage of this method is that during the scooping process, oxygen is directly brought into the crucible by the spoon or other samplers, causing metal oxidation, and it may also cause other parts of the liquid to mix with the liquid in the spoon, which cannot guarantee the quality of the scooped. In addition, because the density of th...

Examples

specific Embodiment example 1

[0027] A specific implementation example 1 is given below: sampling of liquid aluminum alloy in a crucible.

[0028] Iron is an impurity in cast aluminum alloys. In order to find out the content of iron in the depth direction of the crucible, it is necessary to take samples at different depths of the crucible. In this example, the depth of the liquid aluminum alloy in the crucible is 800 mm, and the alloy composition is Si: 7%, Mg: 0.3%, and the rest is Al. It is desired to measure the content (percentage by weight) of iron along the depth direction after being kept at 730° C. for 10 hours.

[0029] Sampling is carried out according to the following steps (refer to figure 1 ):

[0030] 1. Heat the sampling chamber 1 to 750°C. (Reason: In order to prevent the liquid aluminum alloy from being affected after the sampling chamber is immersed in the crucible.)

[0031] 2. Open the inert gas valve 4 and adjust the flow rate so that a small amount of nitrogen gas is blown out fro...

Embodiment example 2

[0039] Implementation Case 2: Sampling of density distribution of coatings for precision casting.

[0040] Coatings for precision casting are made by mixing powdery refractory materials, silica sol solution and a small amount of defoamer. The prepared coating should have uniform density. However, in the process of use, powder settlement will inevitably occur, so the coating on the upper part of the container is thinner and less dense; while the coating on the lower part of the container is thicker and denser. As a result, the process is unstable and affects product quality. In order to control the process, it is necessary to know the change of the coating density of each part of the container with time, and it is necessary to take samples for testing. The formula of coating is as follows (percentage by weight):

[0041] Silica sol: 22%; zircon powder: 78% plus a small amount of wetting agent and defoamer according to the situation.

[0042] Sampling is carried out accordin...

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