Qualified dolomite is transported into the rotary kiln for calcination. Then calcined dolomite is mixed with fluorite and ferrosilicon and pressed into briquette. After that,the briquette is put into retorts where there is vacuum, and then deoxidized into crystallized magnesium, which is called crude Mg. Crude Mg is smelted and refined to get pure Mg.
The complete production line is divided into several systems including raw material storage, dolomite calcination, grinding & briquetting, reduction and refining. We can provide one stop service for dolomite & magnesite calcination, such as plant design, equipment/spare parts manufacturing, free consultation and technical design etc.
Our Technical Advantages:
1. Energy Saving: The refractory lining of the rotary kiln consists of the outer insulation made of light refractory brick and inner compound refractory bricks, which will reduce the heat emission on the shell surface of the rotary kiln. The preheater at the end of the rotary kiln will recycle the heat to preheat the material and save fuel by 40% and increase the output by 30%.
2. Low Consumption: The vertical cooler at the discharge end of rotary kiln recycles the heat of the calcined dolomite which is discharged from the rotary kiln, and will preheat the secondary air up to 600℃. The vertical cooler is integrated with kiln hood to prevent the waste caused by heat emission from the discharged calcined dolomite.
3. Environmental Protection: Two phases of dust collection including cyclone filter and bag filter, will control the dust emission below the limitation of the national standard. The exhaust gas is recycled and dust emission can be controlled under 50mg/m3. This kind of new pre-heater takes up more than 85% in the market share.
4. High Degree of Automation: PLC control system improve the working efficiency.
