Gas purging system comprising a gas purging plug (10) and gas purging plug (10) for metallurgic applications and a gas supply pipe (30) connected to the gas purging plug (10), the gas purging plug (10) with a ceramic refractory body (10k) with a first end (10u) and a second end (100); the second end (100) is in the mounted position of the gas purging plug (10) in contact with a metal melt (41); the first end (10u) is at least partially covered with a metal cover (12.1), the metal cover (12.1) comprises an opening (16) to which optionally a gas supply adapter (20) is connected; the gas purging plug (10) is designed in such a way, that a purging gas which is supplied via the gas supply pipe (30) to the opening (16) flows through the body (10k) and exits the body (10k) at the second end (100); and wherein at least one electronic sensor (70, 70.1, 70.2, 70.3, 70.4) is in contact with the gas purging plug (10), to detect an oscillation waveform of a mechanical vibration (81). The gas purging system further comprises a data processing unit (80) for acquiring the oscillation waveform of a mechanical vibration (81) detected by the electronic sensor (70, 70.1, 70.2, 70.3, 70.4) of the gas purging plug (10) and for calculating a bubble index-signal (83) from the oscillation waveform of a mechanical vibration (81) detected; a control unit (100); wherein the control unit (100) is configured to: displaying the bubble index-signal (83) and/or varying the volume flow (102) through the gas supply pipe (30) depending on the bubble index signal (83) and/or -generating a warning signal (101) when the bubble index signal (83) lies outside a defined range.

The invention relates to a refractory ceramic gas purging element featuring an insert which was cast into a blind hole within a refractory gas permeable body, which insert is made of a refractory ceramic material and has a density different to that of the body.

A diffusion component for impregnating molten steel with a gas includes a barrier having a first side and a second side, a through-hole formed within the barrier, the through-hole connecting the first side to the second side, and a porous element arranged within the through-hole such that the flow of molten steel passes over the porous element. At least one flow disrupter is arranged relative to the porous element and configured to promote non-laminar flow of molten steel passing through the through-hole.

The invention relates to a refractory ceramic gas purging element featuring an insert which was cast into a blind hole within a refractory gas permeable body, which insert is made of a refractory ceramic material and has a density different to that of the body.

Refractory ceramic gas purging element, comprising: a refractory ceramic body, a chamber is arranged at the first end (10u) of the refractory ceramic body (10), which chamber extends over at least 50% of the cross section of the refractory ceramic body at its first end, a gas feeding line enters into said chamber, at a distance to said refractory ceramic body, at a section towards the refractory ceramic body the chamber is at least partially permeable to gas, the chamber comprises at least one plate, which is freely moveable in an axial direction of the gas purging element between a first end position and a second end position, the plate is dimensioned, shaped and placed in the chamber such that a gas flow from the gas feeding line through said chamber up to the first end is even secured when the plate is in its second end position.