What is Magnesite? And What is Magnesite Grinding Mill?

Date:2023-08-11 15:46:58 From: Click:

Magnesite is a mineral composed of magnesium carbonate, serving as the primary source for extracting magnesium. When a solution containing magnesium reacts with calcite, it undergoes transformation into magnesite, thus classifying magnesite under the calcite group. The formation of magnesite also occurs in magnesium-rich rocks. Furthermore, iron or manganese can be found in magnesite due to the substitution of magnesium atoms. Magnesite typically appears white or off-white with a glassy luster; however, iron-containing magnesite exhibits yellow to brown coloration. If crystals are present, they appear granular; otherwise, the texture is blocky. Apart from its application in extracting magnesium, magnesite can also serve as refractory material and find utility in manufacturing various compounds of magnesium.

About Magnesite

The composition of magnesite often involves the substitution of magnesium with iron and manganese, although the natural occurrence of iron in magnesite is generally minimal. Magnesite crystals are trigonal carbonate minerals, typically found as crystalline grains or dense blocks with a cryptocrystalline structure. The latter is also referred to as porcelain magnesite, which exhibits a white or grayish-white coloration. Iron impurities impart a yellow to brown tint and a glassy sheen. It demonstrates complete rhombohedral cleavage, while porcelain magnesite displays shell fracture characteristics. Morse hardness ranges from 3.5 to 4.5, with a specific gravity ranging between 2.9 and 3.1.

The Distribution of Magnesite

The global distribution of magnesite is uneven, with the main concentrations found in Russia, China, North Korea, Australia, and Brazil. China possesses the largest reserves of magnesite globally, ranking first in the world with a total ore reserve of 3 billion tons. Magnesite deposits in China are primarily located in Liaoning Province and are renowned for their high quality and large-scale formation through hydrothermal metasomatism. The important characteristics of magnesite include its limited regional distribution, relatively concentrated reserves, and large deposits.

Application of Magnesite

Use in Refractory

The field of magnesite that has witnessed the earliest development and application is magnesium refractories, which account for approximately 80 to 90% of the total. Through extensive calcination, magnesium undergoes crushing into fine sand or grinding into a fine powder, resulting in metallurgical magnesia or metallurgical magnesium powder. Possessing exceptional fire resistance and adhesion properties, it finds widespread usage in welding metallurgical furnace bottoms, furnaces, and furnace linings. Additionally, it serves as a crucial component in the production of magnesia bricks, chrome-magnesia bricks, and aluminum-magnesia bricks. Its remarkable refractoriness can reach temperatures up to 2000℃ or even higher; thus establishing its status as a high-grade refractory material.

Use in Building Materials

Magnesite is utilized as a binder in the construction materials industry. It can be transformed into magnesia cement, also known as Sorel cement, which exhibits exceptional bonding and plasticity properties. The setting time is brief, and it forms a robust bond with organic matter. Upon hardening, it acquires remarkable hardness and showcases an aesthetically pleasing color, rendering it suitable for architectural embellishment. As a building material, it offers commendable thermal insulation, soundproofing capabilities, heat preservation attributes, and grinding characteristics. Its hardness and elasticity surpass those of conventional cement. Lightly calcined magnesium can be blended with sawdust, wood chips or sand to produce floors, stair treads, particleboard panels, foamed cement structures as well as magnesium-containing plaster; additionally employed in applications such as artificial grinding stones and grinding wheel cements; stone chips; slate; stone walls; stone columns; artificial marble etc., widely applied in residential construction.

Use in Magnesium Smelting

Magnesite has always been one of the primary raw materials utilized in the extraction process of magnesium metal. The production of magnesium metal can be achieved through various methods, including oxidation or chlorination electrolysis, chlorination, roasting, Pidgeon method (external heat method), or direct reduction using solid carbon and ferrosilicon alloy. Approximately 2.5 to 3.2 tons of magnesite are required to yield 1 ton of magnesium metal.

Use In Insulating Materials and Ceramics

The magnesite is subjected to calcination at temperatures ranging from 1400 to 1800℃, resulting in the production of hard-burned magnesium. Subsequently, it undergoes further calcination at temperatures between 2500 and 3000℃ to obtain molten or electric melt magnesium oxide. This material demonstrates exceptional stability, high hardness, robust resistance against chemical corrosion, elevated resistivity, and negligible reactivity with water. It finds widespread application as insulation and advanced refractory materials for manufacturing magnesium crucibles and refractory furnace pipes. Moreover, light-burned magnesium possessing a low thermal expansion coefficient is employed in the ceramic industry as a composite material for firing ceramic products. Furthermore, it serves as a crucial component in the fabrication of cutting-edge industries' high-temperature resistant and high-strength ceramic parts such as jet aircrafts and rocket combustion chamber nozzles.

Magnesite Grinding Mill

Most individuals opt for Raymond mill due to its suitability for refractory materials and lack of high fineness requirements, rendering it a cost-effective choice. However, if there is a need to process finer magnesite powder, Clirik also provides the HGM ultrafine mill as an alternative.

YGM Raymond Mill

Capacity: 1-50 t/h
Feed Size: 35 mm
Powder Fineness: 80-325 mesh

The Magnesite Raymond mill consists of the main machine, forced turbine classifier, pipeline device, high-pressure blower, finished cyclone separator, electromagnetic vibration feeder, electric control motor, jaw crusher, bucket elevator and other components. After grinding, the material is conveyed to the storage hopper by the elevator. Subsequently, the adjustable speed feeder transports it from the hopper to the main engine cavity through the feed port of the cover cylinder. Driven by a transmission device, rotation generates a significant centrifugal force that brings together the grinding roller and grinding ring closely. The shovel blade continuously feeds material onto the grinding ring and roller for rolling extrusion and impact until it is pulverized and refined. The pulverized powder is separated from gas by means of a turbine classifier with qualified powder being sent to double cyclone collection through a pipeline. Any unqualified powder is recycled for further crushing in order to achieve qualification.

HGM Ultrafine Grinding Mill

Capacity: 0.2-45 t/h
Feed Size: ≤20 mm
Powder Fineness: 325-3000 mesh

The complete configuration of the HGM series ultrafine mill includes a hammer crusher, bucket elevator, storage bin, vibration feeder, micro-grinding machine, frequency conversion classifier, double cyclone collector, pulse dust removal system, high-pressure fan, air compressor and electrical control system. When in operation, the main motor drives the spindle turntable to rotate through the reducer. The roller pin at the edge of the turntable drives dozens of grinding rollers to roll in the grinding ring raceway. The bulk material is broken into small particles by the hammer crusher and sent to the storage bin by an elevator. Then through a vibration feeder and inclined feed pipe it is evenly distributed onto a bulk tray on top of the turntable. Under centrifugal force action material scatters around in a circle before falling into raceways where it is impacted by ring rollers then rolled and ground becoming powder after processing three layers of ring paths. A high-pressure fan inhales external air into machine via suction effect bringing crushed material into powder separator where rotating impeller makes coarse material fall back for re-grinding while fine powder meeting requirements enters cyclone powder collector with airflow discharged via lower product discharge valve; meanwhile airflow containing small amount of fine dust purified by pulse dust collector before being discharged via fan and muffler.

Clirik is a reputable manufacturer of mining machinery and equipment, renowned for their global popularity. If you have any interest in our top-notch equipment, please feel free to contact us using the information provided on this page. Moreover, we boast a team of highly skilled engineers and technicians who are capable of tailoring machinery and equipment to meet your specific requirements, ensuring that they perfectly suit your needs. We eagerly await your call!

Hot Products

Pyrophyllite Powder
Pyrophyllite Powder Making Machine Stone Grinding Mill
F ...
CLUM Ultrafine Stone
CLUM Ultrafine Stone Powder Making Machine is the specia ...
Stone Powder Packing
Automatic powder packing is also called valve packing; p ...

Hot news