Vermiculite                    

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Information @ a Glance

General

  • Vermiculite is a natural mineral that expands with the application of heat.
  • Vermiculite is formed by hydration of certain basaltic minerals.
  • Vermiculite is a 2:1 clay, meaning it has 2 tetrahedral sheets for every one octahedral sheet.
  • vermiculite is a member of the phyllosilicate group of minerals, resembling mica in appearance

Application

  • Pressed vermiculite block insulation can be used in high temperature kilns, furnaces, combustion plants, boilers, wood burning stoves and night storage heaters.
  • Vermiculite for refractory and high temperature insulation is normally bonded with alumina cements, fire clays and silicates to produce a wide range of vermiculite products which, depending on type and application can withstand hot face temperatures of up to 1100ºC.
  • Vermiculite is now used extensively in the friction lining industry as a safe alternative to asbestos, and plays an important role in this field.
  • Vermiculite has found its application as an ingredient of fodder at limited foddering of poultry.
  • In agriculture, vermiculite is used as a sorbent, meliorant, fertilizer, radioprotector, and mulch.
    Process
  • During the manufacturing process, vermiculite is “popped” or “exfoliated” at high temperatures so that it expands, releases water and forms a lightweight, fire–resistant material.
  • The dehydration process has been shown to occur through different interstratified states in each vermiculite.
  • The manufacturing process used to produce commercial expanded vermiculite consists of two separate operations.The mining and concentrating operations that produce raw vermiculite flakes are conducted at one location. The exfoliation and classifying operations that produce various sizes of lightweight, expanded vermiculite granules for use in other products are conducted in another location

Market

  • New U.S.Customer Due to a combination of the market's need for stable supplies of quality coarse grade vermiculite and IBI's increasing reputation as a reliable supplier of such material, a number of new prospective customers have contacted the Company and are now trying out the Company's...
  • One way to illustrate the growth-enhancing properties of vermiculite to potential customers is to demonstrate it with plants grown in trial pots, some using soil enriched with vermiculite and some using plain soil as a control.
  • IBI’s customers reports that our coarse grade Namekara vermiculite exfoliates well in the furnace when processed at temperatures as low as 400 Degrees C compared with the usual 800 Degrees C recommended for regular vermiculite.
     

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