What characteristics should blast furnace gunning material have?

 

What characteristics should blast furnace gunning material have?

1 The original furnace refractory material of blast furnace is fully utilized, and the consumption of refractory material is reduced.

2. The gunning operation time is short, the intermediate repair time is saved, and the blast furnace operation rate is improved.

) significantly reduces the heat that needs to be taken away by cooling during major and medium repairs of the blast furnace, thereby reducing energy consumption.

4) The construction of gunning operation is convenient. After gunning, it is beneficial to maintain a reasonable furnace type, improve the distribution of charge and gas flow, improve the utilization of gas energy, and play a role in increasing production and consumption.

What are the main methods of blast furnace gunning and gunning materials?

Blast furnace gunning method gunning materials can generally be divided into the following three ways:

(1) Ordinary cold gunning. Generally, scaffolding or hanging baskets are set up in the blast furnace, and workers enter the blast furnace to carry out gunning. This gunning technology is mostly used for areas below 1000m3.

The blast furnace gunning operation is characterized by simple gunning equipment, flexible cleaning of slag skin and loose residual lining, convenient welding of exposed steel plate anchors and installation of small water cooling parts or replacement of coolers, and easy control of gunning position and thickness. The disadvantage is that the working conditions of workers are poor, and attention should be paid to gas and heat insulation.

(2) Long gun spraying. Long gun gunning is that the operator stands outside the furnace and uses a long gun to carry out the gunning operation on the damaged part of the furnace lining. Its characteristic is that personnel do not enter the furnace,

The construction is simple, and the gunning can be carried out under the condition of temperature regulation. The disadvantage is that the furnace wall must be opened or the original manhole must be used, and only the partially damaged brick lining can be gunned. If the furnace lining is mostly

The score is relatively complete, but it is only partially damaged or the cooler is replaced, and small water-cooling parts are installed. Using this method can save time and money, and is more suitable.

(3) Remote control hot spraying. Remote control hot gunning is to put the robot into the furnace through the opening (or manhole) of the furnace wall, hang it on the bridge, and the operator observes and adjusts the gunning operation through the TV screen outside the furnace.