High-temperature constant-temperature blast furnace hot blast stove and preparing method thereof

Abstract

The invention relates to a high-temperature constant-temperature blast furnace hot blast stove and a preparing method thereof, and belongs to the technical field of hot blast stoves. The high-temperature constant-temperature blast furnace hot blast stove is mainly made of raw materials including, by weight, 45 parts to 60 parts of black silicon carbide, 20 parts to 30 parts of green silicon carbide, 5 parts to 15 parts of mullite, 8 parts to 12 parts of knar clay and 8 parts to 12 parts of Soochow white mud. According to the hot blast stove, black SiC and green SiC are used as main raw materials, the beneficial effects of being resistant to high temperature and corrosion and good in heat conduction are achieved, constant-temperature control over the high-temperature hot blast stove is achieved, heat exchange efficiency is improved, and energy is saved.

Description

technical field [0001] The invention relates to a high-temperature and constant-temperature blast furnace hot blast stove and a preparation method thereof, belonging to the technical field of hot blast stoves. Background technique [0002] For a long time, in the field of ironmaking, the most used hot blast stove is the reversing type (refractory heat storage ball) hot blast stove. This kind of hot blast stove is durable and can exchange heat at a higher temperature. However, this kind of hot blast stove also has many disadvantages, such as huge equipment and high cost; heat storage balls have high packing density, small gaps, slow exchange air velocity, easy to block, large resistance, and high energy consumption; more importantly, The air temperature of this kind of hot blast stove is unstable. At the beginning of reversing, the air temperature is high, which exceeds the process requirements. It needs to be manually mixed with cold air to cool down. Later, the temperature ...

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Problems solved by technology

However, this kind of hot blast stove also has many disadvantages, such as huge equipment and high cost; heat storage balls have high packing density, small gaps, slow exchange air velocity, easy to block, large resistance, and high energy consumption; more importantly, The air temperature of this kind of hot blast stove is unstable. At the beginning of reversing, the air temperature is high, which exceeds the process requirements. It needs to be manually mixed with cold air to cool down. Later, the temperature gradually decreases, and the temperature difference is about 150-200°C. The difference is large, and it cannot be operated at a constant temperature. , it is easy to cause heating to cause unstable product quality, and has a great impact on the quality and output of molten iron during ironmaking

The one-time investment of this kind of hot blast stove is large, and there are many auxiliary equipment, which wastes labor and increases maintenance costs and energy consumption.

[0003] Therefore, conventional hot blast stoves can no longer meet the development requirements of technological development and energy saving, and there is an urgent need to replace the above hot blast stoves with a hot blast stove with high heating temperature, stable wind temperature and energy saving.

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