Blast furnace hot blast stoves can be divided into two types of regenerative hot blast stoves: regenerative type and heat exchange type according to their working principles. According to the combustion method, it can be divided into top combustion type, internal combustion type, and external combustion type. Increasing the hot blast temperature of the hot blast stove is the key technology of blast furnace strengthening smelting. How to improve the wind temperature is the direction of the long-term research of the industry insiders. The common method is to co-fire high-calorific value gas, or increase the heat exchange area of ​​the grid bricks of the hot blast stove, or change the material and density of the grid bricks, or change the shape of the heat storage body (such as heat storage balls), and use various methods. and combustion air preheating. Regenerative lattice brick hot blast stove is the most commonly used form of hot blast stove in modern blast furnaces, especially large blast furnaces. Advantages: high heat exchange temperature, high heat utilization rate, large working air volume, suitable for large blast furnace production needs. Disadvantages: large volume, large floor space, high purchase cost. The heat exchange hot blast stove mainly uses the high temperature resistant heat exchanger as the core component. This component cannot use the metal heat exchanger, but only the high temperature resistant ceramic heat exchanger. The blast furnace gas is fully burned in the combustion chamber. The hot air passes through the heat exchanger to exchange the heat for the fresh cold air, which can make the fresh air temperature reach more than 1000 degrees. Advantages: high heat exchange temperature, high heat utilization rate, small size and low purchase cost. Modern hot blast stove with combustion air preheating using a preheating stove Disadvantages: The heat exchange temperature is not as high as that of the regenerative type, and the scale of use is small