Rebuild of hydro system of tapping machine of No.4 BF at Baotou Steel;

The cause of abnormal BF production pre-keeper tapping machine modification of 2000m3 BF at Tianjin Iron & Steel Co.

1 blast furnace has been overhauled in 2008,high-level domestic manufactured casthouse equipments were applied for the first time,which included full-hydraulic clay gun,taphole opener,cover mover,hydraulic system and control system.

The transformation of remote control of hydraulic clay guns and taphole openers were summarized in this paper.

Improving on the pneumatic system of DDS tapping machine;

Tapping machine is one of the main equipments of blast furnace.

Due to the design disadvantage of DDS pneumatic tapping machine for 3# blast furnace in Meishan Ironworks,the tapping machine bogie has to stay for five seconds when it switches from the advance to retreat.

Pansteel Blast Furnace used simply electric taphole drill for a long time,which cannot apply to higher smelting intensity and the new clay gun.

The axial force and torque of taphole drill are analysed.

Mechanical model of the drill carriage with rotation and vibrating hammer for the new type taphole drill is established.

Analysis of return harness of negative cam shedding mechanism;

Principles analysis and discussion of TOYOTA electronic shedding mechanism;

Analyses made on the stability of heald frame motion and the bearing force of shedding device show that a positive shedding mechanism is superior to a negative one,while electronic revolving dobby represents a development trend in the future due to its application to a wide range variety.