Hot Blast Stove Refractories Performance Requirements
1) Refractory material for hot blast stove has good volume stability, that is, it does not cause permanent excessive expansion and contraction due to internal crystal phase structure changes during high temperature use, so that the heat storage bricks and masonry bodies have good body stability.
2) Refractory material for hot blast stove have good resistance to high temperature load creep.
Hot blast furnace refractory has high heat storage performance, which requires high density and high specific heat capacity.
3) Hot blast stove refractories has a high thermal conductivity, so that the heat storage masonry can absorb and release heat at the highest speed and efficiency in the heat exchanger cycle.
Refractory Material for Hot Blast stove
1) Hot blast stove refractory material application in high temperature area of vault and large wall: silicon brick, mullite brick, sillimanite, andalusite brick or low creep high alumina brick.
2) Hot blast stove refractory material used in regenerator: the upper part of the regenerator is made of siliceous brick, the middle of the regenerator is made of low creep high alumina brick, mullite brick, sillimanite, andalusite brick. The lower part of the regenerator is usually made of fire clay brick. .
3) Hot blast furnace refractory is suitable in combustion chamber: silica brick, mullite brick, or low creep high alumina brick, clay brick.
4) Hot blast stove refractories is suitable in ceramic burner: mullite brick or cordierite mullite brick
The hot air sent by the hot blast stove is sent to the blast furnace through the hot air main pipe, and then the hot air pipe and the air supply branch pipe are distributed to the air vents evenly, so that the coke and the fuel injected in the furnace are burned. This is the common process of the general blast furnace.
With the widespread application of large blast furnaces such as high air temperature and high wind pressure, how to solve problems such as heat insulation, sealing and thermal expansion is the key to these devices.
The hot air surrounding pipe is composed of a steel structure body, a refractory lining, a hanging device and a lower electric hoist monorail beam. The tuyere device is mainly composed of a large tuyere, a middle sleeve and a small tuyere. According to the relevant technical data, when the flow rate of the cooling water in the tuyere reaches 8m/s, if a part of the steam generated by the boiling of the cooling water is heated, it can be quickly taken away without local burning due to poor heat transfer.
