Metal Magnesium Rotary Kiln
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  • Metal Magnesium Rotary Kiln

Product Introduction

The metal magnesium rotary kiln is a specialized rotary kiln developed according to the calcination characteristics of dolomite and the process requirements of the Pijiang method for magnesium refining. It is a key piece of equipment in the dolomite calcination system. The calcined dolomite produced by the rotary kiln features stable and uniform quality, high activity, and low loss on ignition, fully meeting the process requirements of the Pijiang method for magnesium refining. This results in a higher extraction rate of magnesium and better utilization of silicon, reducing the production cost of metal magnesium. It is an ideal equipment for calcining dolomite in the magnesium industry.

Application Fields

Dolomite Calcination in Metal Magnesium Production Line

Outstanding Advantages

1. The rotary kiln consists of the cylinder, support device, transmission device, kiln tail, and kiln head sealing, etc.

2. The length-to-diameter ratio is reduced; shortening the length not only decreases heat loss from the rotary kiln surface to the surroundings but also reduces the equipment footprint.

3. The cooler and kiln head cover adopt an integrated vertical design, occupying a small area; good sealing prevents unorganized discharge of hot waste gas.

4. A vertical preheater is installed at the kiln tail, allowing the waste heat from the kiln tail flue gas to be directly transferred to the dolomite, effectively recovering the heat carried away by the tail gas emissions.

Working Principle

Dolomite is fed into the kiln through the kiln tail (high end) chute. Due to the inclination and slow rotation of the cylinder, the dolomite rolls circumferentially while moving axially from the kiln tail (high end) to the kiln head (low end). Fuel is injected into the kiln from the kiln head end through burners for combustion. Heat is transferred to the dolomite by radiation, convection, conduction, and other methods. Inside the kiln, the dolomite undergoes preheating, decomposition, and firing processes, being calcined into calcined dolomite, which is then discharged from the kiln head device.

Technical Parameters

Specifications Basic Parameters Reducer Motor Number of Supports (units) Machine Weight (t)
Rotational Speed (r/min) Inclination (%) Output (t/h) Model Model Power (kW)
Ø1.6×32m 0.24-2.4 4 2 ZS110-7 YVF2-180L-4 22 3 62
Ø1.6/1.9×36m 0.24-2.4 4 2.5-3 ZQ110-7 YVF2-225S-4 30 3 68
Ø1.9×39m 0.25-2.5 4 3-3.4 ZQ125-7 YVF2-225S-4 37 3 73
Ø2.2×45m 0.27-2.7 3.5 45752 Main ZS125-4 YVF2-225M-4 45 3 110
Ø2.2×45m 0.27-2.7 3.5 45752 Auxiliary: ZQ40-40 YE4-112M-4 4 3 110
Ø2.5×50m 0.21-2.1 3.5 45783 Main: ZS165-5 YVF2-250M-4 55 3 164
Ø2.5×50m 0.21-2.1 3.5 45783 Auxiliary: ZQ40-25 YE4-132M-4 7.5 3 164
Ø2.5×55m 0.21-2.1 3.5 45783 Main ZS165-5 YVF2-250M-4 55 3 170
Ø2.5×55m 0.21-2.1 3.5 45783 Auxiliary: ZQ40-25 YE4-132M-4 7.5 3 170
Ø2.8×55m 0.22-2.2 3.5 45815 Main ZS165-5 YVF2-280S-4 75 3 198
Ø2.8×55m 0.22-2.2 3.5 45815 Auxiliary: ZQ40-25 YE4-160M-4 11 3 198
Ø3.0×60m 0.18-1.8 3.5 45847 Main: ZS165-3 YVF2-355L2-6 132 3 226
Ø3.0×60m 0.18-1.8 3.5 45847 Auxiliary: ZQ40-25 YE4-160M-4 11 3 226
Ø3.2×64m 0.2-2 3.5 45879 Main: ZSY500-50 YVF2-355M1-6 160 3 327
Ø3.2×64m 0.2-2 3.5 45879 Auxiliary: ZSY180-25 YE4-160L-4 15 3 327
Ø3.5×70m 0.2-2 3.5 46005 Main: ZSY560-50 YVF2-355L1-6 220 3 375
Ø3.5×70m 0.2-2 3.5 46005 Auxiliary: ZSY200-25 YE4-180L-4 22 3 375
Ø4.0×80m 0.2-2 3.5 16-20 Main: ZSY630-50 YVF2-3553-6 315 4 564.8
Ø4.0×80m 0.2-2 3.5 16-20 Auxiliary: ZSY200-25 YE4-200L-4 30 4 564.8

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Metal Magnesium Rotary Kiln
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  • Metal Magnesium Rotary Kiln

Metal Magnesium Rotary Kiln

The magnesium metal rotary kiln is the core equipment for magnesium metal production, mainly used for the high-temperature calcination and reduction process of magnesium ores (such as dolomite and magnesite). Its main body is a closed steel cylinder lined with magnesia-chrome refractory materials to withstand high temperatures and chemical corrosion. The cylinder is supported at a 3°–5° inclination by roller devices and driven to rotate slowly (1–4 r/min) by a transmission system. Materials are added from the high end, and reducing gas is introduced from the low end. Utilizing the inclination and rotational movement, a counter-current operation is achieved to complete preheating, calcination, reduction, and other processes, ultimately producing metallic magnesium.

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