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Cenosphere/Microsphere

Commodity: Cenosphere /Microsphere

Size: 20mesh, 40mesh, 60mesh, 80mesh, 100mesh, 150mesh

Density: 0.35-0.46g/cm3

True Density: 0.85-1.0

Floating ratio: 90-95%

Melting Point: 1500-1650℃


Detailed Introduction

Cenosphere is a lightweight, hollow sphere made largely of silica and alumina and filled with air or inert gas, typically produced as a coal combustion byproduct at thermal power plants. The color of cenospheres varies from gray to almost white and their density is about 0.4–0.8 g/cm3 (0.014–0.029 lb/cu in), which gives them a great buoyancy.

 

Cenospheres are hard and rigid, light, waterproof, innoxious, and insulative. This makes them highly useful in a variety of products, notably fillers.

Cenospheres are now used as fillers in cement to produce low-density concrete. Some manufacturers have begun filling metals and polymers with cenospheres to make lightweight composite materials with higher strength than other types of foam materials. Such composite materials are called syntactic foam. Aluminum-based syntactic foams are finding applications in the automotive sector. Cenospheres are used in conductive coatings, tiles and fabrics. Another use is in conductive paints for antistatic coatings and electromagnetic shielding.

 

Cenospheres Production

The process of burning coal in thermal power plants produces fly ash containing ceramic particles made largely of alumina and silica. They are produced at temperatures of 1,500 to 1,750 °C (2,730 to 3,180 °F) through complicated chemical and physical transformation. Their chemical composition and structure varies considerably depending on the composition of coal that generated them.

The ceramic particles in fly ash have three types of structures. The first type of particles are solid and are called precipitator. The second type of particles are hollow and are called cenospheres. The third type of particles are called plerospheres, which are hollow particles of large diameter filled with smaller size precipitator and cenospheres.

Chemical Analysis

Element% by weight
SiO257 – 60 %
Al2O330 – 33 %
CaO0.88 – 1.2 %
K2O1.1 – 1.3 %
Fe2O32.4– 3.2 %
TiO20.8 – 1.15 %
H2O0.35 – 0.5 %
LOI0.85 – 1.15 %

A cenosphere is a lightweight, inert, hollow sphere filled with inert air or gas, typically produced as a byproduct of coal combustion at thermal power plants. Cenospheres are alumina silicate hollow ceramic particles formed during the production of electricity by coal burning power stations. Also referred to as microspheres, hollow spheres, microballoons, hollow ceramic microspheres or glass beads, they are separated from fly ash by electrostatic and floatation methods and were once thought of as unwanted and difficult waste. Their buoyancy meant they could not be buried as landfill as ground water would push them to the surface, once on the surface and dry they would become persistent airborne dust. Cenospheres are now sought after as an inexpensive, lightweight filler for building products, their spherical shape lends cohesive strength to concrete and polymers, their ceramic composition provides excellent insulation and flame resistance and their lightweight reduces transportation costs.Cenosphere (Expanded Mineral Materials Containing Alumina and Silica) are a by-product of coal burning power plants and are lightweight, inert, hollow sphere filled With air or inert gas. the colour of Cenosphere varies from grey to almost white and their density is about 0.4 – 0.8 g/cm3 (0.014 – 0.029 lb./cu in), which provides them with buoyancy.


Cenospheres are hard and rigid, light, waterproof, innoxious, and insulative. This makes them highly useful in a variety of products, notably fillers. Cenospheres are now used as fillers in cement to produce low density concrete. Recently, some manufacturers have begun filling metals and polymers with cenospheres to make lightweight composite materials with higher strength than other types of foam materials. Such composite materials are called syntactic foam. Aluminum based syntactic foams are finding applications in the automotive sector.

Silver-coated cenospheres are used in conductive coatings, tiles and fabrics. Another use is in conductive paints for antistatic coatings and electromagnetic shielding.Cenosphere behaves like tiny ball bearings to improve workability, flow under pressure, reduce shrinkage, enhance isotropic properties and reduce resin, binder or water demand due to their low oil absorption level and high packing factor. Physically, Cenosphere is hard, rigid, light, waterproof, innoxious, and insulative. By utilizing these characteristics of Cenosphere it is possible to produce materials witd excellent heat insulating properties. Cenosphere combine all the advantages of spherical shape with the additional benefits of low density at an economic cost. with low densities Cenosphere reduces tde weight of formulated products.

The process of burning coal in thermal power plants produces fly ash containing ceramic particles made largely of alumina and silica. These particles form a part of the fly ash produced in the burning process. They are produced at the high temperature of 1,500 to 1,750 degrees Celsius through complicated chemical and physical transformation. Their chemical composition and structure varies considerably depending on the composition of coal that generated them.

The ceramic particles in fly ash have three types of structures. The first type of particles are solid and are called precipitator. The second type of particles are hollow and are called cenospheres. The third type of particles are called plerospheres, which are hollow particles of large diameter filled with smaller size precipitator and cenospheres. Due to the hollow structure cenospheres have low density.

The definition of cenosphere has changed over the last 30 years. Up until the 1990s it was limited to a largely carbonaceous sphere caused by the oxygen-deficient combustion of a liquid fuel droplet that was cooled below 200 degrees Celsius before it was consumed. These fuel cenospheres indicated a combustion source using injected droplets of fuel or the open burning of heavy liquid fuels such as asphalt or a thermoplastic material that were bubbling as they burned; the bursting of the bubbles created airborne droplets of fuel.

This is still a common definition used in environmental microscopy to differentiate between the inefficient combustion of liquid fuels and the high temperature fly ash resulting from the efficient combustion of fuels with inorganic contaminants. Fuel cenospheres are always black.

It can also be used in plastics and composite materials such as kayaks, surfboards, bowling balls and for automotive components it can be used in floor tiles, fire bricks, and other industrial materials.


Cenospheres Benefits

The spherical shape of Cenospheres improves flowability in most applications and provides a more even distribution of the filler material.

This cenosphere is highly used in oil drilling, paints, fillers industries etc. Our products are used in oil field cementing to decrease the slurry density.Like sphered products, the properties of these are same. Therefore, to 3,180 °F) through complicated chemical and physical transformation. Their chemical composition and structure varies considerably depending on the composition of coal that generated them.

The ceramic particles in fly ash have three types of structures. The first type of particles are solid and are called precipitator. The second type of particles are hollow and are called cenospheres. The third type of particles are called plerospheres


Packing: 25kg, 500kg, 550kg or 600kg bags.

Quantity: 10-12Mt/20’GP, 22-24Mt/40’HQ


Characteristics: Fine particles, hollow, light weight, high strength, wear resistance, high temperature resistance, thermal insulation.


Application: Refractory insulation materials, Lightweight castable materials, High-grade paving materials, Oil drilling industry, High temperature and high voltage insulators, Surface composite materials, Plastic additive, Powder metallurgy etc.

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