Energy Saving Rotary Kiln for Converting Magnesium Carbonate (MgCO₃) to Magnesium Oxide (MgO)

Product Description:

Magnesite rotary kiln of ZK produced has 11 models according to the specifications and dimensions of the cyclinder, ranging from Ø1.6×32m-Ø4×80m. The diameter of the cyclinder is above 2.2m (including 2.2m) with auxiliary transmission, and the support is changed from three groups to four groups when the diameter of cyclinder is above 3.0m (including 3.0m). The kiln speed is 0.58-2.85r/min, the slope is 3.5-4.0%, and the supporting main motor power is 18.5KW-355KW, which can meet the calcination demand of 2t/h-20t/h magnesite products.

Magnesite is a carbonate mineral of magnesium. It is the main raw material for making basic magnesia refractories and extracting metallic magnesium. Magnesite ore is mainly used for calcining refractories such as light burnt magnesia, sintered magnesia, and fused magnesia. At present, light-burned magnesite mainly uses rotary kiln equipment.

Equipped with a state-of-the-art PLC control system, this Calcination Equipment offers precise and automated operation, enhancing efficiency and control over the calcination process. The advanced control system ensures consistent and accurate results, making it an ideal choice for industries requiring high precision and reliability.

Magnesium Oxide Production Process:

The calcination of magnesite to produce magnesia requires MgO>45%, SiO2<1.2 and CaO<1.5% for the ores used for calcination. The essence of magnesite calcination is the decomposition of carbonate: MgCO;=MgO+CO2.

① Light Burnt Magnesium Oxide

When magnesite is heated to above 640°C, it begins to decompose into magnesium oxide and carbon dioxide. When calcined at 100~1000C, carbon dioxide does not completely escape. The product is a powdery substance called light burnt magnesia (also called caustic magnesium, calcined magnesium, a.-magnesium). Its chemical activity is very strong, has a high degree of adhesiveness, easy to react with water to generate magnesium hydroxide.

② Dead Burned Magnesium Oxide

When calcined at 1400~1800°C, carbon dioxide completely escapes. Due to the occurrence of recrystallization and sintering, magnesium oxide forms a dense mass of periclase, which is called dead burned magnesia (hard burned magnesia, dead burned magnesia, β-magnesium) , This kind of heavy burned magnesia has high refractoriness.

③ Re-burned Magnesia

Re-burned magnesia is melted at 2500~3000°C, and after cooling and solidification, it develops into a perfect periclase crystal, called fused magnesia, called fused magnesia or molten magnesia. High-temperature calcined magnesia is not easy to mix with water Combination of carbonic acid has the characteristics of high hardness, strong chemical resistance and high resistivity.

Features:

1. Good product quality and high output;

2. Stable production operation and high safety;

3. The rotary kiln has a simple structure and strong controllability, which is conducive to operation and maintenance;

Technical Parameters:

Applications:

Henan Zhengzhou Mining Machinery Co., Ltd. has rich experience in magnesite calcination projects, providing customers with a complete set of solutions. The process flow mainly includes raw material storage, magnesite calcination, grinding and pressing, reduction and refining, etc..

Packing and Shipping:

We understand that the safe and timely delivery of your large machinery is paramount to your project's success. Our comprehensive packing and shipping process is meticulously designed to ensure your equipment arrives in perfect condition, anywhere in the world, via sea freight.

Our Packing Process:

Robust, Customized Crating: Each machine is securely mounted onto a custom-built, heavy-duty wooden skid or crate. The framework is constructed to provide maximum structural integrity during transit and handling.

Advanced Weatherproofing: All crates are lined with high-quality waterproof plastic or wax paper. For extra protection against harsh marine environments, we offer fully sealed, air-tight wrapping.

Comprehensive Surface Protection: All exposed surfaces, precision guides, and functional parts are carefully protected with anti-rust VCI (Vapor Corrosion Inhibitor) paper and shock-absorbing materials like foam and bubble wrap to prevent scratches, corrosion, and impact damage.

Clear & Secure Marking: Every package is clearly marked with handling icons, the center of gravity, and your unique identification details for easy recognition and proper handling at the port and final destination.

Our Shipping:

Primary Mode - Sea Freight: As the most efficient and cost-effective solution for heavy and oversized equipment, sea freight is our standard shipping method. We handle all aspects of FCL (Full Container Load) or LCL (Less than Container Load) shipments, as well as specialized Ro-Ro (Roll-on/Roll-off) or flat-rack containers for unusually sized machinery.

End-to-End Coordination: Our experienced logistics team manages the entire process—from our factory floor to your designated port. This includes inland transportation, customs clearance, and all necessary export documentation.

Global Reach: We ship to all major international ports worldwide. Our partnerships with leading global freight forwarders ensure reliable scheduling and competitive freight rates.

Full Documentation: You will receive a complete set of shipping documents, including the Bill of Lading, Commercial Invoice, Packing List, and Certificate of Origin, ensuring a smooth import process for you.