It is derived from rocks containing large crystals of the minerals biotite and iron-bearing phlogopit. As these rocks are exposed to the weather, they start to decompose, allowing water to enter and react with the various chemicals present. As the decomposition and chemical reactions proceed, vermiculite is formed. A typical chemical analysis of commercial vermiculite shows it contains 38-46% silicon oxide (SiO2), 16-35% magnesium oxide (MgO), 10-16% aluminum oxide (Al2O3), 8-16% water, plus…
The Vermiculite that we use in our product and the Micalite Boards is checked by an independent laboratory for the presence of Asbestos. Asbestos has never been detected in our product. Vermiculite is sometimes associated with Asbestos because of an incident that took place in Montana, USA. This particular mine has been closed now for many years and we has never used vermiculite from this source.
Vermiculite is a naturally occurring silver-gold to gray-brown mineral that is mined throughout the world. When heated, the vermiculite ore expands into a light, fluffy material, that is fire resistant, chemically inert, absorbent, light weight and odorless. The absorbent properties of the expanded vermiculite make it useful in lawn and garden, agricultural, and horticultural products. It is commonly used as an ingredient in potting soil, thermal and sound insulation, construction material…
The White Knight Minerals is a company that operates Vermiculite processing and exfoliation, which was established in 2009. Underlying the success of the company is an ethos of commitment to the values of Quality, Service and Reliability. Continuous innovation and close customer interaction have enabled the Company to consolidate its position at the leading edge of the various commercial activities, safeguarding market supply and offering greater flexibility in service to an extensive…
Vermiculite, coated with a bituminous binder, can be used as a dry, lightweight roof screed. This type of screed has the advantages of low thermal conductivity, low moisture content and ease of placement.
Vermiculite plasters can be made with either gypsum or Portland cement. Vermiculite plasters, whether gypsum or cement based, can be applied by hand or by spraying machine. Being a non-abrasive aggregate, vermiculite is well suited to spray application and the sprayed plasters can have an attractive decorative appearance.
Exfoliated vermiculite is a useful packaging medium. Not only is it lightweight, clean and easily poured around irregular shaped objects, it also provides a good baffle against shocks caused by impact and improper handling. Being highly absorbent, it safely retains leaks from packed materials such as hazardous chemicals.
Pressed vermiculite block insulation can be used in high temperature kilns, furnaces, combustion plants, boilers, wood burning stoves and night storage heaters. It is becoming more widely accepted as an alternative for asbestos or man-made mineral fibre insulation. The units can vary from simple blocks to very intricate shapes designed to accommodate electrical elements, fixing screws, etc.
Vermiculite may be milled before or after exfoilation acording to the range of particle sizes required. Such milled or ground material may be used for the production of anti-drumming coatings, condensation control paints, high performance gaskets and seals and for upgrading the fire resistance of organic foams and other polymer based systems. Exfoliated vermiculite can be coloured to suit its end use (eg. retail display).
Vermiculite For Filtration Media and Effluent Treatments Adsorbent vermiculite appointed for filtration of effluent treatment Power Plants and enterprises (industries with domestic), as well as elimination oil spills, organic and toxic liquids from the solid surface and surface waters.
This high temperature, heat and flame resistant vermiculite coated fiberglass fabric will withstand temperatures of 1500°F / 815°C continuous exposure. The base High Temperature fiberglass fabric is fabricated from high quality type E fiberglass that will not burn. The fabric is then coated with a vermiculite dispersant.
Bulk expanded vermiculite is used to fill the inter-wall and other building cavities, ceilings, insulation. The effectiveness of vermiculite filling characterized by the following figures: 20 cm layer of expanded vermiculite insulation properties of masonry is equivalent thickness of 1.5 meters and virtually eliminates heat loss through the attic floor.
When constructing floors, intermediate floors and attic insulating layer of organizing expanded vermiculite with a minimum thickness of 5 cm if both issues are resolved, and insulation (expanded vermiculite is also an excellent thermal insulator), the thickness of the layer must be increased to 8 cm
Loosefill vermiculite can be used between joists in lofts for home insulation. The free flowing properties of exfoliated vermiculite make installation very simple. The insulating properties of vermiculite significantly reduce the loss of heat in cold weather and keep the interior cool in hot weather. It also functions as a sound absorbent material.
Vermiculite is basically a hydrated phlogopite mica which has the remarkable ability to expand to many times its original volume when heated, a property known as exfoliation. Various chemical formulae are given for vermiculite.