Pyrophyllites Uses And Processing Technology

2021-09-07

Summary:The name of pyrophyllite: pyrophyllite, also known as Shoushan stone, Qingtian stone, and Balin stone.Pyrophyllite composition: Pyrophyllit

What Is Pyrophyllites

The name of pyrophyllite: pyrophyllite, also known as Shoushan stone, Qingtian stone, and Balin stone.

Pyrophyllite composition: Pyrophyllite is a hydrous aluminosilicate, the main associated minerals are quartz, kaolin, sericite, and contain iron oxide, calcium oxide, magnesium oxide, potassium oxide and other impurities. The chemical formula of pyrophyllite is Al2[Si4O10](OH)2 and the structural formula is Al2[Si4O10(OH)2]. The theoretical chemical composition contains 28.3% Al2O3, 66.7% SiO2, and 5.0% H2O.

The properties of pyrophyllite: pyrophyllite is generally white, gray, light blue, light yellow, light green and greenish brown; transparent to translucent; pearly luster on fresh surface; oily feeling when touched; hardness 1.5; specific gravity 2.65 ~2.90g/cm3; melting point 1700°C.

Usage Of Pyrophyllite

Pyrophyllite is mainly used as raw materials for ceramics, refractory materials and carving craft stones, fillers, sealing materials, etc.

1. Ceramic Raw Materials

During the firing of the ceramic body, the pyrophyllite transforms into cristobalite at about 1200°C, and the volume expands greatly, while the kaolin shrinks significantly at the same temperature. The two compensate each other, but the volume of the body basically remains unchanged. Change. The fading effect of pyrophyllite at high temperature makes the magnet have particularly white and high brightness characteristics. Pyrophyllite can be used as a raw material for the production of microporous ceramics for batteries, and can also be combined with silica sand, kaolin, chromic acid, magnesium oxide, and aluminum sulfate to produce heat-resistant insulating ceramics. Pyrophyllite can also be used as a raw material for white Portland cement.

2. Refractory Materials

Pyrophyllite refractory bricks are excellent refractory materials. They are mainly used for steel cylinder lining bricks and glazed bricks of steel casting systems, as well as for casting iron furnace lining bricks, various furnace bottoms and flue ducts. This refractory has a high melting point, is stable in volume at high temperatures, and is not easily broken when the temperature changes drastically. There is no need to calcinate in advance, but pyrophyllite of specified particle size can be directly mixed into refractory ingredients. On the contact surface of the pyrophyllite refractory brick and the molten slag, a protective layer of high toughness material can be formed, which can effectively reduce the damage rate of the refractory brick and extend the life of the refractory brick.

3. Glass Fiber Raw Materials

Pyrophyllite is one of the raw materials of alkali-free glass balls. Alkali-free glass balls are used to draw glass fibers, which are used to produce electrical insulation devices, glass fiber reinforced plastics, rubber products and glass cloth.

4. Filler And Carrier

In the papermaking, rubber, paint, chemical, pesticide and other industries, pyrophyllite is used as a filler and carrier for its excellent properties such as low hardness, slippery, stable chemical properties, good covering power and adsorption, and high whiteness.

5. Sealing Material And Reaction Chamber

High-quality pyrophyllite is a high-quality sealing material for aerospace engine nozzles. Pyrophyllite has a small expansion coefficient at high temperatures, high thermal stability, low thermal emissivity, excellent thermal insulation, ablation resistance, lubricity and sealing. It can be used as a sealing putty material for high-temperature and high-speed airflow impact components Aerospace industry. Utilizing the high melting point and chemical stability of pyrophyllite, the reaction chamber, pressure transmission medium and high temperature and high pressure sealing insulating material for synthetic diamond can be made.

6. Carved Colored Stones, Ornamental Stones, Seal Stones

The translucent pyrophyllite with beautiful color and pattern, waxy or pearly luster, is a valuable raw material for carving crafts, such as Shoushan stone, Qingtian stone, blood stone, frozen stone, etc.

Pyrophyllite Powder Processing Technological Process

Phase one: raw material crushing pyrophyllite blocks will be crushed to 15mm-50mm fineness by crusher.

Phase two: grinding pyrophyllite material will be sent to the storage hopper by the elevator, and than the feeder will send the material to the main mill for grinding.

Phase three: classifying Ground material will be classified, coarse powder will fall back to the main mill to be ground again.

Phase four: production collecting Qualified powder will flow with the air and be collected in the dust catcher, then the finished powder will be transported to the product storage bin through discharge port. Lastly, the powder will be loaded by tank car or packed by packing machine.

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