Magnesium oxide rotary kiln

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Magnesium Oxide rotary kiln

Rotary kiln for magnesium oxide

Materials: magnesium oxide

Magnesium oxide

Capacity: 100-10000t/h

Application: metallurgy, chemical industry, building refractory materials, environmental protection, steel plant, etc

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Magnesium oxide rotary kiln refers to a rotary kiln for magnesium oxide manufacture. The manufacturing process of magnesium oxide mainly includes beneficiation, sintering, drying, screening, crushing, finished products, and other sections. The magnesium oxide rotary kiln is the core equipment for the sintering process, our rotary kiln has high calcining temperature, high calcining intensity, and strong processing capacity, which can bring effective benefits to users, maximize the quality of semi-finished magnesium oxide products and ensure the full utilization of its raw materials.

About magnesium oxide

Magnesium oxide belongs to the category of cementitious materials. It is a white powder with a melting point of 2852℃ and a boiling point of 3600℃. It has highly refractory and insulating properties. With the upgrading of industrialization and the demand and development of the high-tech functional materials market, the application fields of magnesium oxide are becoming more and more extensive.

Currently, magnesium oxide is mainly used in chemical products such as magnesium sulfate and heptahydrate magnesium sulfate, and in refractory materials, it is the main raw material for making magnesia furnace bottom materials for steelmaking. In the field of construction, it is widely used in the production of shipping containers, fire-resistant boards, decorative arts, vegetable greenhouses, wall insulation boards, activity boards, asbestos tiles, etc. It is used to increase wear resistance, good adsorption, lower melting point, and can change the metal lattice structure (finer). Therefore, it is used in kiln refractory brick for paint coatings, magnetic materials, ceramics, rubber tires, and so on.

Factory direct supply

quality assurance

24h service

convenient operation

magnesium oxide rotary kiln working principle

The process flow of the magnesium oxide rotary kiln can be divided into nine steps: beneficiation – entry into the rotary kiln – sintering – manual selection – inspection – blending – crushing – inspection – packaging and storage.

The raw materials for the magnesium metal process are crushed by a crusher into qualified materials (30-40mm), which are then sintered in a magnesia rotary kiln, calcined into calcined white, cooled by a cooling machine, and then ground into powder by a ball mill. The powder is then pressed into balls by a ball press, mixed uniformly with ferrosilicon powder (containing 75% silicon) and fluorite powder (containing 95% GaF2), loaded into a heat-resistant stainless steel reduction tank, and placed in a reduction furnace. Coarse magnesium is produced by reduction at 1200-1250℃ and a vacuum degree of 1.33Pa. The crude magnesium is then refined with a flux, cast into ingots, and surface treated to obtain the final product, magnesium ingots.


superior performance

Our magnesia rotary kiln has features of stable performance, simple operation, simple structure, reliable production process control, less wearing parts, high operation rate.

advanced technology

We adopt an advanced hydraulic wheel stop device, high-precision metering plunger pump, speed regulating valve and contact graphite block sealing device and other domestic advanced technology.


Compared with equipment of the same specifications, the operation rate has increased by 10%, the output has increased by 5%-10%, and the heat consumption has decreased by 15%.

environmentally friendly

Our system effectively reduces the damage of mine dust to the human body, and improves the work efficiency slowed down by dust, to meet the requirements of environmental protection production.

Our equipment

Our service

1. Raw Material Test

2. Program Design

3. Device Manufacturing

4. installation

5. debugging

6. Technical Training

7. delivery on time

8. after-sales service

Our cases

Specifications of Magnesium oxide rotary kiln

Size(m)Kiln dimensionsMotorpower(kw)Total weight(t)

FAQ of Magnesium oxide rotary kiln

1. There is a phenomenon of ringing.

Solution: When the ringing is far from the discharge port, there is no need to turn off the exhaust and reduce the feeding amount. Just pull out the coal injection pipe to burn it off. When the kiln skin grows long and thick or there is mild ring root, the coal injection pipe should be pulled outwards and the combustion zone position should be moved to lower the temperature at the ringing area, change the position of coal ash settling, and gradually collapse the thick and long kiln skin.

2. Explosion in the magnesia rotary kiln.

Solution: Before ignition, try to reduce the hot air supply or not supply hot air to the kiln, reduce the settling of coal powder. If hot air is needed, the exhaust fan can be turned on, and the kiln body can be rotated at low speed to discharge the coal powder outside the kiln.

3. Ash discharge from the tail of the kiln.

Solution: Timely block the leaks in the preheater, flip valve, pipeline, and door, reduce the impact of air leakage on the kiln operation, and ensure that the temperature and pressure return to normal. Re-weld the anchor bolts and casting material between the sloping ramp of the kiln tail smoke chamber and the feeding chamber according to the design requirements.

4. Temperature rise in the trunnion bearing.

Solution: Drain the circulating water outside, increase the cooling water volume, and strengthen the lubrication of the contact surface between each gear and the supporting wheel. If the temperature of the entire supporting wheel is high, water can be added to the water tank under the supporting wheel to reduce the temperature. If the temperature at the shaft shoulder or thrust ring is high, the operating state of the hydraulic gear can be changed.

5. Wear or cracks in the trunnion bearing socket ball.

Solution: The trunnion bearing socket and ball are cast with high-polymer composite material, which has strong adhesion, excellent comprehensive mechanical properties, and good resistance to water, oil, and chemical media, which can reduce maintenance time and create greater economic value.

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