According to the new Pidgeon magnesium smelting process and the actual conditions of Meijin Energy ore, raw fuels used, production capacity, etc., Zheng Mining Machinery and technical personnel conducted on-site exploration and inspection to reserve raw materials, dolomite calcination, and high-temperature flue gas from rotary kilns in the production process of magnesium metal. Dust removal provides a solution that satisfies the other party.

1) Raw material reserve

Considering the half-month production and usage, the dolomite storage site is planned, and the ferrosilicon and fluorite storage warehouses are reasonably arranged. The dolomite is crushed to the required particle size in the mine and stored in the yard after entering the factory. Ferrosilicon and fluorite are directly stored in warehouses after entering the factory.

2) Dolomite calcination

The project consists of two dolomite calcination production lines, using 2 sets of energy-saving and environmentally friendly Ф2.5x40m rotary kilns and 2 sets of 6-tap vertical preheaters. Dolomite with qualified particle size is transported by the belt to the top silo of the vertical preheater and enters the preheater through the material pipe. After the chute enters the rotary kiln, it is calcined at a high temperature of 1250°C into active calcined white, and then unloaded into the cooler, where the high-temperature calcined white exchanges heat with the cold air blown by the fan to cool the active calcined white to below 100 °C, and the air is preheated Above 600℃, it is used as combustion-supporting air into the kiln to support combustion.

3) Kiln tail dust removal

Choose 2 large bag filter. The high-temperature flue gas generated by the combustion of the rotary kiln, after heat exchange with the dolomite in the preheater, the temperature drops below 250~280 ℃, enters the bag filter for dust removal, and is discharged into the atmosphere through the high-temperature fan, and the dust-containing gas is discharged. The concentration is less than 30mg/m3.