Precision Renewal of BOF Tap Holes - Without Damaging the Mother Block

The taphole in an LD/BOF converter allows molten steel to flow out. Over time, it wears out and must be drilled and replaced quickly to avoid production loss.
Machines Used:

🔹 Converter Taphole Renewal Machine (CTRM)

• Performs taphole drilling and sleeve renewal in 5–10 minutes.
• Self-aligning drilling system maintains drill axis accuracy.
• Works with cylindrical, conical, and monolithic sleeve types.

🔹CTRM-A (Attachment)

• Cost-effective solution for plants that already own a TBWM or EBTRM.
• Uses Zetko’s Mechanical Quick Coupler for fast tool change.
• Offers solid, TC, and fine cutter drill bits for different applications.

🔹 Sundrila Attachment

• Budget-friendly option for converter taphole drilling.
• Operates through an independent hydraulic motor — no need for boom hydraulics.
• Typical drilling time: 15–20 minutes.
These solutions keep converter tapholes functional and minimize converter downtime.

BOF/LD Converter Taphole sleeve replacement technology:
Our CTRM machine is suitable for drilling the worn-out Taphole sleeve and inserting a new Taphole sleeve. It works with all types of Taphole sleeves in the market -Cylindrical, segmental, cylindrical monolithic, conical with block, conical monolithic and many more.
• Accordingly, machine can be customized based on customer’s requirements.
• Taphole drilling operation can be performed within 5 to 10 minutes (Depending on site conditions).
• CTRM has twin drill head technology which maintains the drill axis during Converter Taphole drilling operation.
• Zetko has created an economical solution to perform taphole drilling operation: Sundrila.

This attachment can be used with new or existing Telescopic Boom Wrecking Machine.
• Taphole drilling time: 15 to 20 minutes (Based on site conditions).
• This attachment is run by a hydraulic motor and does not need Telescopic boom’s rotation for drilling.
• It can be interchanged quickly with the use of our Mechanical quick coupler which will reduce the machine downtime and increase its productivity.
• Drill bits are provided based on the application needs: Solid drill bit, TC drill bits, fine cutter drills and many more.