Eibel, Anna

Slag detection unit (10) configured to detect the occurrence of slag (6a) in a molten metal stream (6) guided in a direction (60) through a passageway (1) of a refractory part (50, 50a, 51a), such as a casting channel (2) of a well block (51a), the slag detection unit (10) comprising: a refractory part (50, 50a, 51a) with a passageway (1), preferably a well block (51a) with a casting channel (2); a transmitter (20) positioned at a first side of the passageway (1), preferably at a first side of the casting channel (2); a receiver (30) positioned at a second side of the passageway (1), preferably at a second side of the casting channel (2); wherein the second side is different from the first side, preferably the second side is opposite from the first side with respect to the passageway (1), more preferably the second side is opposite from the first side with respect to the casting channel (2); the transmitter (20) being configured to direct a magnetic field (B) at least partially though the passageway (1), preferably through the casting channel (2); the receiver (30) being configured to receive at least a part of the magnetic field (B) emanating from the transmitter (20) and passing through the passageway (1), preferably passing through the casting channel (2) and method for detecting the occurrence of slag.

Slag detection unit (10) configured to detect the occurrence of slag (6a) in a molten metal stream (6) guided in a direction (60) through a casting channel (2) of an eccentric bottom taphole (50'), the slag detection unit (10) comprising: an eccentric bottom taphole (50') with a casting channel (2); a transmitter (20) positioned at a first side of the casting channel (2) of the eccentric bottom taphole (50') and preferably in contact with the eccentric bottom taphole (50'), more preferably in contact with an outer surface of the eccentric bottom taphole (50'); a receiver (30) positioned at a second side of the casting channel (2) of the eccentric bottom taphole (50') and preferably in contact with the eccentric bottom taphole (50'), more preferably in contact with an outer surface of the eccentric bottom taphole (50'); wherein the second side is different from the first side, preferably the second side is opposite from the first side with respect to the casting channel (2); the transmitter (20) being configured to direct a magnetic field (B) at least partially though the casting channel (2); the receiver (30) being configured to receive at least a part of the magnetic field (B) emanating from the transmitter (20) and passing through the casting channel (2) and an electric arc furnace (5.1).

The present invention discloses a gas purging plug configured to transport gas from a bottom end of the gas purging plug to a top end of the gas purging plug, the gas purging plug comprising a first refractory body, the first refractory body comprising a first end, a second end and a lateral surface, the first end being arranged at the top end of the gas purging plug and the second end being arranged closer to the bottom end of the gas purging plug than the first end; the first refractory body further comprising at least two refractory plates, wherein each refractory plate extends from the first end to the second end of the first refractory body and each refractory plate is adjacent to at least one further refractory plate; the first refractory body further comprising at least one gas channel being arranged between adjacent refractory plates, the at least one gas channel extending from the first end to the second end of the first refractory body; the gas purging plug further comprising a second refractory body, wherein the second refractory body extends from the top end to the bottom end of the gas purging plug, and surrounds the lateral surface of the first refractory body, and is impermeable to gas; wherein each refractory plate is provided in the form of a pressed and sintered refractory plate comprising pores, wherein said pores are at least partly filled with a carbonaceous material.

The present invention discloses a method for obtaining a secondary refractory raw material comprising the following steps: 1.1. Providing a used refractory product; 1.2. Providing a comminution device comprising a comminution chamber, wherein a vertical axis is defined ranging from the top end to the bottom end of the comminution chamber, the comminution chamber comprising a supply opening located at the top end of the comminution chamber, and a discharge opening located at the bottom end of the comminution chamber, the comminution chamber further comprising at least two rotors being arranged at different heights along the vertical axis of the comminution chamber, each rotor comprising a rotor shaft, each rotor shaft being arranged coaxially with the vertical axis of the comminution chamber, and each rotor comprising a number of impact tools extending into the comminution chamber, wherein the impact tools preferably extend into the comminution chamber in a direction perpendicular to the vertical axis; 1.3. Supplying the used refractory product to the comminution chamber of the comminution device via the supply opening and directing the used refractory product through the comminution chamber; 1.4. Rotating at least two of said rotors in opposite directions of rotation around the vertical axis while the used refractory product is directed through the comminution chamber; 1.5. Impacting the used refractory product with the impact tools of the rotors to crush the used refractory product into grains, 1.6. Directing the grains of the used refractory product out of the comminution chamber via the discharge opening; and 1.7. Obtaining a secondary refractory raw material in the form of grains of the used refractory product.

Refractory inlay (1) for a refractory checker brick (2, 2.1, 2.2, 2.3) of a vertical regenerator (3), the refractory inlay (1) comprising a refractory inlay body (10), the refractory inlay body (10) comprising a refractory inlay body top surface (10t) and a refractory inlay body bottom surface (10b); a refractory inlay body front surface (10f) and a refractory inlay body rear surface (10r); a refractory inlay body first side surface (10.1) and a refractory inlay body second side surface (10.2); at least two refractory inlay shafts (11,12), namely a first refractory inlay shaft (11) and a second refractory inlay shaft (12), each refractory inlay shaft (11,12) comprising a refractory inlay shaft top surface (11t, 12t) and a refractory inlay shaft bottom surface (11b, 12b); a refractory inlay shaft front surface (11f, 12f) and a refractory inlay shaft rear surface (11r, 12r); a refractory inlay shaft first side surface (11.1, 12.1) and a refractory inlay shaft second side surface (11.2, 12.2); wherein the refractory inlay shaft second side surface (11.2) of the first refractory inlay shaft (11) is connected to the refractory inlay body first side surface (10.1); wherein the refractory inlay shaft first side surface (12.1) of the second refractory inlay shaft (12) is connected to the refractory inlay body second side surface (10.2); wherein the refractory inlay shaft bottom surfaces (11b, 12b) of the first refractory inlay shaft (11) and the second refractory inlay shaft (12) are configured to be suspended on a refractory checker brick top surface (2t) of a refractory checker brick (2).

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Zusammenfassung wird geladen …

Zusammenfassung wird geladen …

Zusammenfassung wird geladen …

Zusammenfassung wird geladen …