• Vermiculite Northwest Fact Sheet, 2009 Update

    vermiculite ore from the 1940s until it closed in 1974. The ore used at the former Vermiculite Northwest facility was obtained from a mine in Libby, Montana, which was last owned and operated by the W.R. Grace Company. The ore that came from Libby was contaminated with asbestos. After it arrived at Vermiculite

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  • VCX · Dicalite Management Group

    VCX vermiculite ore concentrate has an impressive combination of properties that make it an ideal insulator, flame-resistant additive, and additive in coatings, plastics, and a variety construction-related and industrial materials. It is available in three product grades, each having a different particle size range.

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  • Vermiculite

    Crude vermiculite ore produces the basic material used in the manufacture of fire protection and industrial insulation products. The process equipment consists of three rotary furnaces for heating and reaction. Torftech Ltd. (UK) replaced these with a single toroidal fluidized bed (Torbed) furnace of 1-m diameter with a capacity of 2 ton/hr. ...

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  • What is vermiculite used for?

    What is vermiculite and what is it used for? In this article you will read more about the properties and applications of this mineral. Pure nature. Vermiculite is an ore, a pure and natural product. In order to make the raw vermiculite suitable for use, the coarse …

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  • State of Oregon: Department of Environmental Quality

    The facility was used as a processing plant for vermiculite ore mined in Libby, Montana. W. R. Grace shipped raw vermiculite ore via rail to processing plants throughout the country, including this facility in Portland. At the facility, the raw vermiculite ore was processed for use in consumer and building products, by mixing it with hot air ...

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  • 5 Things You Need to Know About Vermiculite | Family Handyman

     · Vermiculite is a mineral that was used for insulation. If your home was built before 1990, you might have vermiculite insulation in your walls or attic. Up to 85 percent of all vermiculite insulation in the U.S. came from a mine in Libby, Montana, sold under the name Zonolite.

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  • Vermiculite and Libby

    Most vermiculite is not contaminated with asbestos. However, the vermiculite ore taken from a mining operation in Libby, Montana, was contaminated with asbestos amphibole minerals, including tremolite and actinolite. Learn more about the history of asbestos in Libby below.

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  • Hazardous Substance Tools: What about vermiculite?

    Vermiculite is a mineral ore that has been expanded to produce the familiar light granules that are sometimes used as loose fill insulation. Only a few vermiculite ores contain asbestos. However, between 1960 and 1990, 70 percent of the world''s vermiculite ore came from a mine in Libby, MT, and was marketed as Zonolite.

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  • Vermiculite

    Vermiculite is a mica-like silver-gold to gray-brown mineral that is mined around the world. In its natural state Vermiculite is flat and shiny. When heated to around 1000 degrees C, it puffs up creating pockets of air. This expanded form is used in a variety of commercial and consumer products, because it is fire-resistant and has good ...

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  • Vermiculite

    Vermiculite ore is invariably an alteration product of a variety of mafic minerals: biotite, phlogopite, rarely muscovite, diopside, tremolite, augite, hornblende, olivine, chlorite, and serpentine. All known deposits have formed in the zone of circulating groundwater above the water table. The alteration may include an intermediate biotite or ...

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  • Vermiculite | Encyclopedia

     · None of the ore bodies currently used by major vermiculite producers pose an asbestos health risk to workers when the material is processed in accordance with the applicable MSDS. In August 2000, the United States Environmental Protection Agency (EPA) issued a report regarding vermiculite sold as a soil amendment.

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  • 4 cu. ft./29.9 Gal./113 l Horticultural Vermiculite

    It can be used both indoor or outdoor to improve the water retention of the soil or potting soil and can also be used with other combinations for a total soilless plant media for hydroponic gardening. I used it to repot some house plants that were getting root bound and need repotting. I mixed the vermiculite at a 1 to 4 ratio with potting soil.

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  • EPA/Asbestos/Vermiculite Fact Sheet

    Vermiculite is produced from ore mined throughout the world. In the United States, mines are located in Montana, South Carolina, and ia. When heated, the ore expands into a light, rather fluffy material, that is fire resistant, chemically inert, absorbent, light weight, and …

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  • Exposure to Asbestos-Containing Vermiculite Ore and ...

     · It is estimated that between 1924 and 1990, when the mine was closed, a total of 5.8 million tons of vermiculite ore was mined and distributed (Kuntz et al. 2009), making Zonolite Mountain the largest vermiculite ore mine in the United States. In addition to the mine, processing, exfoliation, and shipping preparations were performed in Libby.

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  • Horticultural Vermiculite for Gardening, Soil Amendment ...

    Vermiculite is commonly used by those in the gardening trade to root cuttings. It can be used in various ways, either used alone, mixed with soil, or combined with bark for a soilless potting mixture. Whether used alone, or in a mix, propagating a cutting with vermiculite will promote anchorage for new roots, and speed up root growth.

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  • What is Vermiculite?

    Lump of vermiculite ore, screened vermiculite, exfoliated vermiculite (Picture courtesy of Palabora Europe) Vermiculite is a hydrated magnesium aluminum silicate mineral which resembles mica in appearance. It is found in various parts of the world including Australia, Brazil, Bulgaria, Kenya, Russia, South Africa, Uganda, USA and Zimbabwe.

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  • What is Vermiculite | How to Use Vermiculite in Gardening

    Vermiculite is silicate material which is used in horticulture as growing medium. The name originates from the word vermiculture which means to breed worms. Vermiculite can hold potassium, Calcium, Magnesium, Ammonium which are needed for plant growth. The color, composition, and pH of vermiculite vary from mine to mine.

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  • Tremolite Asbestos | Danger of Tremolite and Where It''s Found

    Tremolite Asbestos. By now many people are familiar with the story of the W.R. Grace vermiculite mine in Libby, Montana. Grace owned and operated the mine from 1960 to 1993, mining an ore that is heated, crushed and then used for insulation products. The vermiculite in the Libby mine is contaminated with tremolite asbestos.

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  • Vermiculite is a porous mineral used as insulation, and to ...

     · identified facilities in the country that received vermiculite ore from Libby, Montana (3). Some of these facilities were involved in the manufacturing of construction materials and agricultural products (1,3). Vermiculite is commonly used in building insulation and as an additive for potting soil (1).

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  • Perlite vs Vermiculite, Fully Explained

    Perlite and vermiculite are both lightweight sand substitutes for soilless potting mixes which are often used to improve aeration and texture in potting soil and garden soil mixtures. Both are odorless, sterile, disease-free, insect-free, and seed-free.

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  • Perlite vs. Vermiculite: How and Why to Use Them – Garden ...

     · Like perlite, vermiculite is an effective soil conditioner that can loosen compacted soil, provide drainage, and hold three to four times its weight in water. But—and this is an important but —vermiculite is more compressible and less porous than perlite, giving vermiculite higher water-holding capacity when it''s used as a planting medium.

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  • What is Vermiculite? What is it used for? | Trees

     · Vermiculite is commonly used by those in the gardening trade to root cuttings. It can be used in various ways, either used alone, mixed with soil, or combined with bark for a soilless potting mixture. Whether used alone, or in a mix, propagating a cutting with vermiculite …

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  • Vermiculite

    Vermiculite - Wikipedia

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  • Average band-depth-ratio values of expanded vermiculite ore.

     · Figure 16. Average 1.40/1.42 – 1.38/2.32-μm band-depth-ratio values of commercial expanded vermiculite ore samples used to determine their mine sources. Details. Image Dimensions: 1892 x 2775. Date Taken: Monday, November 6, 2017. Location Taken: US. Source:

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  • Vermiculite Insulation

    For more than 60 years, W.R. Grace & Co. dug vermiculite ore out of the Zonolite Mountain in Libby. Vermiculite is a volcanic mineral compound that expands when wet. It is used in agricultural, construction, horticultural and industrial applications, including pesticides, insulation, potting mixes, brake pads, sound deadening materials, fire ...

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  • STRATEGY FOR FURTHER ASSESSMENT OF VERMICULITE …

    vermiculite ore shipped from the Libby mine. The non-exfoliation sites also had fewer material handling and processing steps (e.g., receiving shipments as bagged product vs. in bulk via railcar). o For instance, at gypsum wallboard manufacturing facilities (the largest grouping of non-exfoliation sites), the vermiculite ore was commonly

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  • Multipurpose ore raw vermiculite In Industrial Grade ...

    Vermiculite has been an established commercial commodity for well over 50 years, and is currently used throughout the world. Vermiculite ore mined near Libby, Montana, which accounted for more than half the worldwide production of vermiculite from 1925 to 1990, was contaminated with asbestos and asbestos-like fibers.

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  • (DOC) RESEARCH ON VERMICULITE ORE USED IN TUNDISH …

    The native vermiculite deposit in Orsova area was used in casting powder technologies and experimental tests were performed in the laboratory but also in steelwork. Physical and chemical characteristics of experimental tundish powder created the

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  • Vermiculite

    Vermiculite is a hydrous phyllosilicate mineral which undergoes significant expansion when heated. Exfoliation occurs when the mineral is heated sufficiently, and commercial furnaces can routinely produce this effect. Vermiculite forms by the weathering or hydrothermal alteration of biotite or phlogopite. Large commercial vermiculite …

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  • Vermiculite Health, Safety and Environmental Aspects

    Vermiculite, in ore concentrate and exfoliated state, may contain small quantities of crystalline silica, as quartz. This is usually only present as non-respirable particles but mechanical action such as milling may reduce any quartz that may be present to a respirable particle size. Silica is a very abundant material in a variety of forms and

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  • Raw Vermiculite Flake, Unexpanded Vermiculite, Cude ...

    Premium golden color expanded vermiculite for horticulture soil amendment, construction insulation, and animal feed. Raw gold vermiculite ore is bulkily supplied at direct factory price! Golden exfoliated vermiculite is classified into a wide variety of sizes, which includes 20-40mesh, 40-60mesh, 60-80mesh, 80-120mesh, 1-3mm, 2-4mm, 3-6mm, 4-8mm.

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  • Vermiculite is a porous mineral used as insulation, and to ...

    identified facilities in the country that received vermiculite ore from Libby, Montana (3). Some of these facilities were involved in the manufacturing of construction materials and agricultural products (1,3). Vermiculite is commonly used in building insulation and as an additive for potting soil (1).

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  • Mineral Resource of the Month: Vermiculite

    Mineral Resource of the Month: Vermiculite. by U.S. Geological Survey . Tuesday, September 2, 2014. Arnold O. Tanner, a mineral commodity specialist for the U.S. Geological Survey, compiled the following information on vermiculite, which is used in construction and horticulture.. Vermiculite comprises a group of hydrated, laminar magnesium-aluminum-iron silicate minerals resembling mica.

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  • Vermiculite: Uses for growing plants, safety, and ...

     · After mining, the ore is separated from other minerals and screened to classify it into different particle sizes. Like perlite, these different sizes comprise the different grades of vermiculite: large, medium, fine, superfine and micron. The most commonly used …

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  • DEPARTMENT OF HEALTH & HUMAN SERVICES

     · Vermiculite ore is a micaceous mineral used as insulation, in cements, and in horticultural mixes.1 Some vermiculite has been documented to be contaminated with asbestos. In the 1980s, NIOSH found significant asbestos exposures and excess asbestos-

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  • What is Vermiculite? What is it used for? | Trees

     · Vermiculite is commonly used by those in the gardening trade to root cuttings. It can be used in various ways, either used alone, mixed with soil, or combined with bark for a soilless potting mixture. Whether used alone, or in a mix, propagating a cutting with vermiculite will promote anchorage for new roots, and speed up root growth.

    Get price