Longevity discussion of valve plank of hot blast valve;

Structures and application of hot blast valve cooling cavity;

The main damage reason of the valve disc of blast furnace hot blast valve was analyzed.

Cooling principle of traditional paddle is making the paddle be cooled by increase water volume and heat transfer area,while cooling principle of micro water valve is increasing the heat transfer coefficient through designing special channel.

Application of SKT - 14 numerically - controlled air valve jig;

The paper redesigns the control of numerical control air valve of jigging machine for coal cleaning equipment by using LG PLC controller and touching screen.

To counter the difficulty in lubricant addition into the jig's air valve system with triple air sources and the disadvantage of frequent stoppage and large volume of maintenance work required, and taking consideration of advantage and disadvantage of similar facility, both domestic and aboard, developed was a new automatic lubrication facility composed of home made elements.

This paper mainly introduces how to control jigger air-valve fuzzily based on a way to monitor the loose condition of bed layer, so the air-valve parameters are self-modified, and the wind volume is controlled, as a result we can optimize the layer of jigging bed.

As the key device of jigger, the reliability of electromagnetic air-valve affects the function of the whole machine, and the automatic control of air-valve is the important part of the automatic control of the jigger.

The auto -control of air-valve is a difficult problem in the jigger control project, the capability of the auto-control of air-valve affects the delamination of the coal bed directly.