Molten Metal Samplers for High and Low Oxygen Applications

Patent metadata

Field	Value
Publication number	US-2019376876-A1
Application number	US-201916434901-A
Country	US
Kind code	A1
Filing date	Jun 7, 2019
Priority date	Jun 12, 2018
Publication date	Dec 12, 2019
Grant date	—

Abstract

The present invention relates to a sampler for taking samples from a molten metal bath, particularly a molten steel bath, the sampler comprising:
a carrier tube having an immersion end; a sample chamber assembly arranged on the immersion end of the carrier tube, the sample chamber assembly comprising a cover plate and a housing, wherein the housing comprises an immersion end having an opening; an inflow conduit having a first end for receiving molten metal and a second end, opposite the first end, wherein the second end is in communication with the opening, wherein the opening is configured to receive the molten metal from the inflow conduit; a measuring head, wherein the sample chamber and the second end of the inflow conduit are at least partly arranged in the measuring head; and a de-oxidant material arranged along a central axis of the inflow conduit, wherein at least part of the de-oxidant material is arranged near the second end of the inflow conduit inside the measuring head, and wherein the inflow conduit comprises first coupling means, arranged on the second end of the inflow conduit, wherein the de-oxidant material comprises second coupling means, to interact with the first coupling means on the inflow conduit to anchor the de-oxidant material in a position along the central axis of the inflow conduit. The invention also relates to a sampler for taking samples from a molten metal bath, particularly a molten steel bath, the sampler comprising: a carrier tube having an immersion end; a sample chamber assembly arranged on the immersion end of the carrier tube, the sample chamber assembly comprising a cover plate and a housing, wherein the housing comprises an immersion end having an opening; an inflow conduit having a first end for receiving molten metal and a second end, opposite the first end, wherein the second end is in communication with the opening, wherein the opening is configured to receive the molten metal from the inflow conduit; a measuring head, wherein the sample chamber and the second end of the inflow conduit are at least partly arranged in the measuring head; and a metal bushing, wherein the metal bushing coupling the inflow conduit to the sample chamber.

First claim

1 . A sampler for taking samples from a molten metal bath, particularly a molten steel bath, the sampler comprising:
a carrier tube having an immersion end; a sample chamber assembly arranged on the immersion end of the carrier tube, the sample chamber assembly comprising a cover plate and a housing, wherein the housing comprises an immersion end having an opening; an inflow conduit having a first end for receiving molten metal and a second end, opposite the first end, wherein the second end is in communication with the opening, wherein the opening is configured to receive the molten metal from the inflow conduit; a measuring head, wherein the sample chamber and the second end of the inflow conduit are at least partly arranged in the measuring head; and a de-oxidant material arranged along a central axis of the inflow conduit, wherein at least part of the de-oxidant material is arranged near the second end of the inflow conduit inside the measuring head, and wherein the inflow conduit comprises first coupling means, arranged on the second end of the inflow conduit, wherein the de-oxidant material comprises second coupling means, to interact with the first coupling means on the inflow conduit to anchor the de-oxidant material in a position along the central axis of the inflow conduit.

2 . The sampler of claim 1 , wherein the de-oxidant material comprises an aluminum material.

3 . The sampler of claim 1 or 2 , wherein the de-oxidant material is shaped as a flat sheet having a thickness of 0.05 to 0.2 mm, more preferably 0.1 to 0.15 mm, most preferred 0.125 mm.

4 . The sampler of claim 1 , wherein the amount of the de-oxidant material corresponds to 0.1% to 0.5%, preferably 0.2% to 0.3% of the sample mass.

5 . The sampler of claim 1 , wherein the inflow conduit comprises a quartz material, preferably a fused quartz material.

6 . The sampler of claim 1 , wherein the first coupling means is realized by at least one recess, preferably two recesses, in the material of the inflow conduit, arranged towards the second end of the inflow conduit, and wherein the second coupling means is realized by at least one projection, preferably two projections, to interact with the first coupling means on the inflow conduit to anchor the de-oxidant material in the position along the central axis of the inflow conduit.

7 . The sampler of claim 1 , wherein the first coupling means is realized by at least one projection, preferably two projections, in the material of the inflow conduit, arranged towards the second end of the inflow conduit, and wherein the second coupling means is realized at least one recess, preferably two recesses, to interact with the first coupling means on the inflow conduit to anchor the de-oxidant material in the position along the central axis of the inflow conduit.

8 . A sampler for taking samples from a molten metal bath, particularly a molten steel bath, the sampler comprising:
a carrier tube having an immersion end; a sample chamber assembly arranged on the immersion end of the carrier tube, the sample chamber assembly comprising a cover plate and a housing, wherein the housing comprises an immersion end having an opening; an inflow conduit having a first end for receiving molten metal and a second end, opposite the first end, wherein the second end is in communication with the opening, wherein the opening is configured to receive the molten metal from the inflow conduit; a measuring head, wherein the sample chamber and the second end of the inflow conduit are at least partly arranged in the measuring head; and a metal bushing, wherein the metal bushing couples the inflow conduit to the sample chamber.

9 . The sampler of claim 8 , wherein the metal bushing is adapted to reach from the sample chamber assembly to the first end of the inflow conduit.

10 . The sampler of claim 8 , wherein the metal bushing has at least two different wall thicknesses and/or diameters along its length.

11 . The sampler of claim 8 , wherein the metal bushing comprises an aluminum material, and/or wherein the inflow conduit comprises a quartz material, preferably a fused quartz material.

12 . The sampler of claim 8 , wherein the metal bushing has a length of 10 to 40 mm, an inner diameter of 4 mm, and an outer diameter of 6 mm.

13 . The sampler of claim 8 , wherein the metal bushing is pressed into the sample chamber for coupling the inflow conduit to the sample chamber.

14 . The sampler of claim 8 , wherein the sampler comprises a protection cap attached to the first end of the inflow conduit.

15 . The sampler of claim 8 , wherein the bushing comprises grooves on an outer surface of the bushing to minimize heat transfer to the sample chamber assembly.

Assignees

• Heraeus Electro Nite Int

Inventors

• Doets Jan
• Neyens Guy
• Vaes Hilaire
• Mingneau Frank
• Beyens Dries

Classifications

• G01N2001/1031

  Sampling from special places · CPC title

• G01N1/1409

  adapted for sampling molten metals · CPC title

• G01N33/20

  Metals · CPC title

• G01N33/204

  Structure thereof, e.g. crystal structure · CPC title

• G01N33/2028

  Metallic constituents · CPC title