Vermiculite Ore Containing

  • US5079280A - Low temperature expandable vermiculite and ...

    A method of decreasing the expansion temperature and improving the expansion characteristics of vermiculite ore comprising subjecting vermiculite ore containing interlamellar cations to a potassium nitrate solution for a time interval sufficient to ion-exchange interlamellar cations within said ore with potassium ions. Subsequent to this ion exchange the low temperature expandable vermiculite ...

  • Incidental Vermiculite Building Insulation Exposure Hazards

    Vermiculite insulation exposure levels in residential buildings: What are reasonable risk assessments for people exposed to vermiculite insulation in residential buildings. Most research on health hazards from asbestos-containing vermiculite insulation has focused on workers at vermiculite mining or processing sites or at communities close to those locations.

  • Vermiculite Health, Safety and Environmental Aspects

    Vermiculite and other ore bodies can contain a variety of associated minerals such as mica, quartz, feldspar, etc. ... Vermiculite, in ore concentrate and exfoliated state, may contain small quantities of ... Information given in this booklet is only intended as an introduction to health, safety and environmental aspects of vermiculite. It does ...

  • Study of Asbestos Contamination of Former Vermiculite ...

    Historically, vermiculite has been used for a variety of products including loose-fill insulation, as a carrier for agricultural chemicals, and as an additive in potting soils.12 The vermiculite ore from Libby was mined from an open pit and beneficiated, crushed, sized, and sorted at the mine site into vermiculite …

  • Asbestos in Vermiculite Insulation | Wisconsin Department ...

    Over 70% of vermiculite ore mined worldwide came from the Libby, Montana mine. The ore from this mine also included a natural deposit of amphibole/tremolite asbestos. Much of the vermiculite from Libby was contaminated with asbestos. Asbestos fibers are invisible to …

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

    Jul 01, 2010· Exposure to Asbestos-Containing Vermiculite Ore and Respiratory Symptoms among Individuals Who Were Children While the Mine Was Active in Libby, Montana. Lisa C. Vinikoor, Theodore C. Larson, Thomas F. Bateson, and ; Linda Birnbaum

  • Asbestos in Vermiculite and Vermiculite Containing Products

    Asbestos in Vermiculite - History Libby, Montana • The Libby mine was the source of estimated 70-90% of all vermiculite sold in the U.S. from 1919 to 1990 • W. R. Grace bought the mine and processing facility in 1963 and operated it until 1990. Vermiculite expands or "pops" when heated. This creats pockets of air that

  • Vermiculite Insulation Asbestos Hazards

    Aug 15, 2000· All vermiculite ores contain a range of other minerals that were formed along with the vermiculite in the rock. Vermiculite ores from some sources have been found to contain asbestos minerals but asbestos is not intrinsic to vermiculite and only a few ore bodies have been found to contain more than tiny trace amounts.

  • Asbestos Used in Potting Mixtures - Discover Where ...

    Asbestos in Potting Mixtures Explained. Most people consider gardening a safe activity, but the Environmental Protection Agency (EPA) found that some potting soil mixtures are contaminated with vermiculite, which is often mixed with soil for its ability to hold water and fertilizer for longer periods of time than soil alone.

  • Vermiculite - Wikipedia

    Impure vermiculite may contain, apart from asbestos, also minor diopside or remnants of the precursor minerals biotite or phlogopite. Controversy over health risks. The largest and oldest vermiculite mine in the United States was started in the 1920s, at Libby, Montana, and the vermiculite was sold under the commercial name Zonolite.

  • Schundler Company Vermiculite Technical Information ...

    Dec 07, 2014· Further studies were done with scanning electron microscopy (SEM) of the crude, unexpanded vermiculite. The conclusion: "The results of our analysis program confirm that the sample of crude vermiculite ore provided by American Vermiculite Corporation is composed of high grade vermiculite containing only minor traces of impurities.

  • How vermiculite is made - material, history, used ...

    Vermiculite ore deposits may also contain a variety of other materials such as mica, quartz, and feldspar. These deposits vary from one mining location to another. During the manufacturing process, some of these materials may pose potential health hazards to workers.

  • STRATEGY FOR FURTHER ASSESSMENT OF VERMICULITE …

    Strategy for Further Assessment of Vermiculite Ore Asbestos Sites September 30, 2008 I. Background : The Agency is committed to developing a strategy by the end of FY08 for conducting further assessments of vermiculite ore asbestos sites: "We agree it would be prudent to take another look at the completed site assessments

  • What is Vermiculite? – Pollution Prevention and Toxics

    All vermiculite ores contain a range of other minerals that were formed along with the vermiculite in the rock. Vermiculite ores from some sources have been found to contain asbestos minerals but asbestos is not intrinsic to vermiculite and only a few ore bodies have been found to contain more than tiny trace amounts.

  • EPA/Asbestos/Vermiculite Fact Sheet - University of …

    Vermiculite ores often contain a range of other minerals including, in some cases, asbestos. Asbestos is not a major contaminant, and only a few ore deposits have been found to contain more than trace amounts of asbestos minerals. However, exposure to airborne asbestos particles has been linked to respiratory ailments in-

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

    Jul 01, 2010· Libby is a small community located in the Kootenai River Valley of northwestern Montana approximately 6 miles southwest of Zonolite Mountain, a mountain containing high concentrations of vermiculite ore. The ore was mined beginning in the 1920s by the Zonolite Company and then later by W.R. Grace, which bought the mine in 1963.

  • Vermiculite - EMSL Analytical, Inc.

    Vermiculite ores from some sources have been found to contain asbestos minerals but asbestos is not intrinsic to vermiculite and only a few ore bodies have been found to contain more than tiny trace amounts. Vermiculite mines are surface operations where ore is separated from other minerals, and then screened or classified into several basic ...

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

    Libby is a small community located in the Kootenai River Valley of northwestern Montana approximately 6 miles southwest of Zonolite Mountain, a mountain containing high concentrations of vermiculite ore. The ore was mined beginning in the 1920s by the Zonolite Company and then later by W.R. Grace, which bought the mine in 1963.

  • A risk assessment for exposure to grunerite asbestos ...

    Vermiculite Ore Containing Tremolite Asbestos. The mineral vermiculite has the generalized chemical formula (Mg, Ca) 0.35 (Mg, Fe, Al) 3 (Al, Si) 4 O 10 (OH) 2 nH 2 O. On heating, the mineral loses water rapidly and expands to form a lightweight aggregate used for various purposes, e.g., insulation, soil conditioning, and filter medium.

  • Brazilian Vermiculite Manufacturers | Suppliers of ...

    Brazilian manufacturers and suppliers of vermiculite from around the world. Panjiva uses over 30 international data sources to help you find qualified vendors of Brazilian vermiculite.

  • Asbestos Analysis of Vermiculite and Vermiculite ...

    vermiculite attic insulation (VAI) which may contain asbestos. • People who have homes with vermiculite attic insulation should become informed, not alarmed,” said Stephen L. Johnson, EPA’s Assistant Administrator for the Office of Prevention, Pesticides, and Toxic Substances.

  • 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 …

  • Perlite vs Vermiculite, What's the Difference + what you ...

    There are 19 different varieties of micaceous minerals that form vermiculite and its ores contain silica, iron oxides, magnesium oxide and alumina. The Differences Between the Two. Physical Properties. Perlite is composed of white and porous granules, which is often mistaken as Styrofoam balls. Not only that, it also has sharp edges.

  • YOUR HOME; Removing Asbestos in Vermiculite

    Jan 21, 2001· So when vermiculite is mined, the ore often contains asbestos. And while all asbestos is harmful and can cause lung cancer and other diseases, he said, the asbestos fiber usually found in ...

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

    Oct 08, 2012· Vermiculite is a mineral ore that is composed of hydrated laminar magnesium-aluminum-iron silicate (1). Vermiculite ores may also contain a range of other minerals including asbestos (1). All vermiculite does not necessarily contain asbestos, however, much of the vermiculite from Libby

  • Vermiculite Insulation - www.TheHomeInspector.com - The ...

    All vermiculite ores contain a range of other minerals that were formed along with the vermiculite in the rock. Vermiculite ores from some sources have been found to contain asbestos minerals but asbestos is not intrinsic to vermiculite and only a few ore bodies have been found to contain more than tiny trace amounts.

  • (PDF) Exposure to Asbestos-Containing Vermiculite Ore and ...

    Exposure to Asbestos-Containing Vermiculite Ore and Respiratory Symptoms among Individuals Who Were Children While the Mine Was Active in Libby, Montana

  • VERMICULITE IS NOT ASBESTOS

    • All vermiculite ores contain a range of other minerals that were formed along with the vermiculite in the rock. Vermiculite ores from some sources were even found to contain asbestos minerals but asbestos is not intrinsic to vermiculite and only a few ore bodies have been found to contain more than tiny trace amounts.

  • USGS Scientists Develop New Tool to Determine if ...

    Apr 05, 2018· “The goal of this USGS study was to find an onsite way to test for asbestos by determining if near-infrared reflectance measurements, using portable spectrometers, could be used to reliably identify the source of vermiculite ore and therefore its potential to contain asbestos,” said Denver-based USGS scientist and first author Gregg Swayze.

  • Western Mineral Products: Vermiculite Processing ...

    Vermiculite is a naturally occurring mineral used in insulation (brand name, “Zonolite”), construction, and gardening products. From 1924 -1990, most of the world’s supply of raw vermiculite ore came from Libby, Montana. This ore is now known to contain a group of mineral fibers called ...

  • Workers Exposed To Libby Vermiculite Ore ... - ScienceDaily

    More than one-quarter of tested workers at an Ohio manufacturing plant historically exposed to asbestos-containing vermiculite ore exhibited signs of scarring of the chest wall lining, or pleural ...

  • Libby vermiculite exposure and risk of developing asbestos ...

    The vermiculite ore formerly mined in Libby, Montana, contains asbestiform amphibole fibers of winchite, richterite, and tremolite asbestos. Because of the public health impact of widespread occupational and nonoccupational exposure to amphiboles in Libby vermiculite…

  • Vermiculite - an overview | ScienceDirect Topics

    Attic insulation produced using vermiculite ore, particularly ore that originated from the Libby mine, may contain asbestos fibers. Today, vermiculite is mined at three U.S. facilities and in other countries that have low levels of contamination in the finished material. Health Problems. Asbestos can cause health problems when inhaled into the ...

  • Difference Between Perlite & Vermiculite | Home Guides ...

    Dec 27, 2018· It consists mostly of silica and has water molecules trapped within it. Vermiculite comes from 19 varieties of micaceous minerals and the ores contain silica, alumina, iron oxides and magnesium oxide.

  • Products Containing Asbestos: Home Products, Appliances ...

    However, this mica ore may contain asbestos. In a study of gardening products containing vermiculite, the Environmental Protection Agency (EPA) found trace amounts of asbestos in 17 of 38 products tested (Sampling and Analysis of Consumer Garden Products that Contain Vermiculite, EPA, August 2000).

  • Vermiculite FAQs | Dudley Services, Inc.

    When vermiculite (Zonolite ore) is disturbed it can release asbestos fibers into the air which increases the risk of lung cancer, mesothelioma, asbestosis and other asbestos related diseases. If the area containing the vermiculite is avoided and left undisturbed, then risk of …