I. Core Functions & Working Process
Drilling out the old lining:Under high temperature (approx. 1000℃), the impact-rotary carbide drill crushes and removes the eroded and slag-built old refractory bricks in the tap hole caused by molten steel and slag.
Trimming to standard hole profile:Precisely reams the hole to the designed inner diameter and coaxiality, ensuring tight installation of new thimble bricks and a regular tapping channel.
Rapid replacement of thimble bricks:After reaming, new tap hole thimble bricks are installed immediately to complete tap hole repair.
II. Key Functions (Core Problems Solved)
Ensuring production continuity:Replacing manual/oxygen lance cleaning, it completes reaming and brick replacement within 10 minutes, greatly reducing converter downtime for maintenance and improving operating rate.
Stabilizing tapping quality:Ensures consistent tap hole diameter, angle and coaxiality, stabilizes tapping flow rate and duration, reduces re-oxidation and slag entrapment of molten steel, and improves steel purity.
Extending converter service life:Avoids mechanical damage to the tap hole seat bricks and converter body caused by manual cleaning, protecting the furnace structure.
Reducing safety risks:Realizes remote/mechanical operation, keeping operators away from high temperature, dust and molten steel splashing, thus improving operational safety.
Improving economic benefits:Reduces refractory consumption and labor costs, increases converter efficiency, with remarkable comprehensive benefits.
III. Application Scope
Routine maintenance and thimble brick replacement for tap holes of medium and large converters (60–300 t).
Emergency repair when the tap hole has irregular diameter or poor tapping due to erosion and slag buildup.
| Parameter | LBD400 |
| Weight | 25T |
| Telescopic stroke | 3000mm |
| Hole diameter | Φ180-Φ400mm(L=1600mm)
|
| Boom rotation torque | ≥45000N.m |
| Boom swing angle | 360° |
| Drive Modes | Diesel or Electric
|
Operation options
| Cabin or Remote or Both
|
Attachments
| Reamer、Boom Extension |
