Bracket Brick

The main reason for the low thermal efficiency of large energy-saving magnesium reduction furnaces is the high exhaust temperature. The exhaust temperature is as high as 1150~C or above, close to the furnace temperature. To improve the thermal efficiency of the reduction furnace, the waste heat of the flue gas must be fully recovered and utilized.

Thermal storage combustion technology utilizes the heat absorption and heat release of high-efficiency heat storage bodies to recover the physical heat of high-temperature flue gas to the maximum extent, preheat the air and coal gas, and reduce the exhaust temperature of the flue gas from 1150~C to about 150~C. The temperature of the air and coal gas entering the furnace increases from room temperature to about 1000℃, which can recover more than 80% of the energy taken away by the flue gas, greatly improving the thermal efficiency of the reduction furnace. The air and coal gas preheated at high temperature can burn at a low oxygen concentration. The low oxygen concentration reduces the average combustion speed, expands the combustion boundary, forms a uniform temperature field, and reduces the NO concentration. The uniformity of furnace temperature is the first factor to ensure the magnesium production rate and magnesium reduction quality of the reduction furnace. Only when the furnace temperature is uniform can the magnesium reduction furnace develop towards large-scale.