Therefore, a study was carried out to develop a monolithic taphole made of unburnt low-carbon MgO-C in combination with Al 2O 3-SiC-C.

Study on Clause 421 of USA Trade Law to China’s Steel Export;

Development and Application of Magnesia-Carbon Taphole Brick for a 60 t Ultra-High Power Electric arc Furnace;

Using of selfflowing mending material to mend taphole of 25t converter in Laiwu iron and steel general works,it can overcome the defects which are consisted of mending material on taphole to be corroded easily and difficulty to control the tapping time,etc,.

Operating practice of tapping hole maintenance and repair in 150 t EAF in Baosteel

The main low life causes of tapping hole are found after analyzing damaged mechanism of tapping hole of 30T converter.

Through taking whole magnesia carbon tap hole brick which is shaped in isostatic pressing condition and taking reaming machine to ream for it,the application of heat exchange technology of tap hole on 25t oxygen top blown converter can stabilize tap operation and increas productivity and quality of liquid steel.

After reformation of the tap hole of converter,steel no longer gets into the tap hole,qualified slag-blocking ratio reaches up to 95 percent.