The main task of the magnesium oxide rotary kiln designed and manufactured by Tongli is to calcine the raw materials (such as Dolomite or Magnesite) at high temperature (sometimes some flux or modifier is added) to convert it into magnesium oxide. The equipment can reduce the moisture content of the material from 20% to below 5%, and the drying time is about 2 to 2.5 hours. The total weight of the equipment is about 30 tons, the external area is about 60 square meters, and the outside of the cylinder is equipped with a 100 mm thick insulation layer.
Efficient Magnesium Oxide Calcination Solution
A MACHINE YOU CAN DEPEND ON!
The diameter of the magnesium oxide rotary kiln produced by Tongli is usually between 3 meters and 5 meters, the length is usually between 30 meters and 100 meters, and the working temperature is usually between 1500°C and 2000°C. Our high temperature kilns create stable profits for customers in the long term due to their durability, efficiency and service life.
The CNC machine tool has an accuracy of ±0.01mm and a laser cutting tolerance of ±0.05mm, which improves component assembly accuracy, reduces mechanical errors, and improves overall performance and stability.
Automated welding technology increases welding strength by 30%, using international standard welding materials. The tensile strength of welded joints is 450MPa, reducing deformation at high temperatures and ensuring long-term stable operation.
Using high-chromium cast iron with a hardness of HB500 and refractory bricks with a temperature resistance of 1500°C, the wear resistance is increased by 60%, significantly extending the life of the equipment and reducing the frequency of maintenance.
xxxxxxx | Capacity (t/h) | Motor Model: | Gearbox Model | Input Moisture (%) | Fuel Coal Calorific Value (kcal) | Output Moisture (%) |
φ1.2x10 | 2.5-3 | M160M-6 → 7.5 | ZQ350Ⅱ-25 | 25±5 | ≥5500 | ≤13 |
φ1.5x14 | 7-9 | Y180L-6 → 15 | ZQ400Ⅱ-31.5 | 25±5 | ≥5500 | ≤13 |
φ1.5x18 | 9.5-12 | Y180L-6 → 15 | ZQ400Ⅱ-31.5 | 27±5 | ≥5500 | ≤13 |
φ1.8x14 | 12-15 | Y200L-6 → 18.5 | ZQ400Ⅱ-31.5 | 25±5 | ≥5500 | ≤13 |
φ1.8x18 | 14-18 | Y200L1-6 → 18.5 | ZQ400Ⅱ-31.5 | 27±5 | ≥5500 | ≤13 |
φ2.0x18 | 18-22 | Y200L2-6 → 22 | ZQ50Ⅱ-31.5 | 25±5 | ≥5500 | ≤13 |
φ2.0x20 | 18-23 | Y200L2-6 → 22 | ZQ50Ⅱ-31.5 | 30±5 | ≥5500 | ≤13 |
φ2.2x18 | 21-25 | Y200L2-6 → 22 | ZQ65Ⅱ-31.5 | 27±5 | ≥5500 | ≤13 |
φ2.2x20 | 22-25 | Y225M-6 → 30 | ZQ65Ⅱ-31.5 | 30±5 | ≥5500 | ≤13 |
φ2.4x20 | 25-29 | Y225M-6 → 30 | ZQ75Ⅱ-31.5 | 27±5 | ≥5500 | ≤13 |
φ2.4x22 | 26-30 | Y225M-6 → 30 | ZQ75Ⅱ-31.5 | 30±5 | ≥5500 | ≤13 |
φ2.6x20 | 28-33 | Y250M-6 → 37 | ZQ85Ⅱ-31.5 | 25±5 | ≥5500 | ≤13 |
φ2.6x24 | 29-35 | Y250M-6 → 37 | ZQ85Ⅱ-31.5 | 30±5 | ≥5500 | ≤13 |
φ3.0x20 | 45-50 | Y280S-6 → 45 | ZQ100Ⅱ-31.5 | 25±5 | ≥5500 | ≤13 |
The magnesium oxide rotary kiln is a device used to produce high-purity magnesium oxide. The basic principle is to heat the magnesium-containing ore (such as magnesite or electric magnesium ore) to the decomposition temperature through the high temperature environment in the rotary kiln to convert it into magnesium oxide.
The structure of the rotary kiln includes an inclined cylindrical kiln body, which rotates slowly at a certain speed and is equipped with a fuel nozzle and a fan system. The raw materials enter the kiln through the feed end, and after heating and reaction, the final magnesium oxide product is discharged from the discharge end. The temperature range of the whole process is usually between 1500°C and 2000°C, and the speed of the kiln body is generally 0.2 to 1.0 rpm.
The main technical parameters of the magnesium oxide rotary kiln include: kiln diameter (usually 2-4 meters), kiln length (commonly 30-100 meters), rotary kiln speed (0.2-1.0 rpm), heating temperature (1500°C-2000°C), feed particle size (usually 5-20 mm), and air flow velocity (0.5-2.0 m/s). In addition, the choice of fuel (such as natural gas, coal powder or oil) will also affect the efficiency of the production process and the quality of magnesium oxide.
Common heat sources for magnesium oxide rotary kilns include natural gas, coal powder, heavy oil and electricity. Natural gas is often preferred because it burns cleaner and more stably. Coal powder, as a traditional fuel, has a lower cost, but produces more ash during combustion. Heavy oil is suitable for situations where higher heat is required, while electric heating can achieve more precise temperature control, but the cost is higher. The choice of different heat sources will directly affect the energy efficiency, production cost and product quality of the kiln.
The temperature control of the magnesium oxide rotary kiln is achieved through the supply of fuel and the air flow. The temperature in the kiln body is usually monitored by multiple temperature sensors and adjusted by an automated control system. Common control methods include adjusting the fuel amount of the fuel nozzle and the air volume of the fan to ensure that the temperature in the kiln is maintained between 1500°C and 2000°C. In addition, thermocouples and infrared thermometers can be used to monitor the temperature changes in the kiln in real time.
In order to reduce heat loss and improve energy efficiency, magnesium oxide rotary kilns often adopt a variety of insulation and heat insulation measures. Common measures include installing high-temperature resistant insulation materials such as ceramic fibers, refractory bricks and heat insulation coatings on the outside of the kiln body. In addition, the design of the kiln body also takes into account the optimization of the insulation effect, such as the use of double-layer structures and gas circulation systems to improve the overall thermal efficiency and reduce heat loss.
The magnesium oxide rotary kiln will produce certain waste gas and dust during the production process, and these emissions need to be treated to meet environmental protection standards. Common treatment methods include: using bag filters or electrostatic precipitators to remove dust, using wet or dry desulfurization devices to reduce sulfide emissions, and installing waste gas recovery systems to reduce heat loss. Depending on regional environmental regulations, nitrogen oxides and other harmful gases may also need to be treated.
Magnesite ore, primarily composed of magnesium carbonate (MgCO3), is the primary raw material used in magnesium oxide production, heated to high temperatures for calcination.
Dolomite, a carbonate mineral containing magnesium and calcium, is used to produce magnesium oxide by calcining at elevated temperatures in a rotary kiln.
Brucite (Mg(OH)2) is another magnesium-rich mineral used in rotary kilns to produce high-purity magnesium oxide by dehydration and calcination processes.
Magnesium sulfate, derived from magnesium salts, can be processed in a rotary kiln to obtain magnesium oxide for various industrial applications, such as refractory production.
Sea water, rich in magnesium salts, can be processed to extract magnesium hydroxide, which is then calcined in a rotary kiln to produce magnesium oxide for chemical and environmental industries.
Magnesium chloride, typically extracted from brine or seawater, undergoes a thermal decomposition process in rotary kilns to produce magnesium oxide, essential for refractory and chemical uses.
Serpentine, a magnesium silicate mineral, can be used in a rotary kiln to produce magnesium oxide by heating, which is important for high-temperature applications in various industries.
Asbestos-containing materials, rich in magnesium silicates, can be processed in rotary kilns to recover magnesium oxide, an environmentally sustainable method of waste disposal and resource recovery.
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AddressNo. 2289 Huancheng South Road, Tongxiang, Jiaxing, Zhejiang Province, China. Zip code:314500
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