vermiculite ore samples

Research Method for Sampling and Analysis of Fibrous Amphibole in Vermiculite

vermiculite ore, the vermiculite is also segregated into different size fractions for different applications. this to the analyst is that non-vermiculitefragments may be common in some samples but relatively rare in others. 2 1.2 Required Characteristics for an Get price

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Rationale: From 1921 to 1990, vermiculite ore from Libby, Montana, was shipped worldwide for commercial and residential use. A 1980 study of a manufacturing facility using Libby vermiculite was the first to demonstrate a small but significant prevalence of pleural chest radiographic changes associated with amphibole fibers contained in the ore. Get price

Mine sources of expanded vermiculite ore samples

2017/11/6Detailed Description Figure A15. Same as Figure 21 with 2.24/2.38-μm band depth ratio and 2.24-μm absorption wavelength position values of a few expanded vermiculite ore samples derived from spectra measured at finer spectral resolution (6 nm) then convolved to Get price

Sampling and Analysis of Crude Vermiculite Samples For Possible

samples and the result obtained from the Medium grade vermiculite after digestion 0.1% quartz, there should not be any health hazard, specifically related to crystalline silica, when the materials are used in a controlled environment. Get price

Sampling and Analysis of Crude Vermiculite Samples For Possible

silica in any of the samples of vermiculite. 4.3. For the samples subjected to chemical digestion prior to analysis by XRD, no cristobalite was detected in any of the samples and quartz was detected in all four samples as follows: Micron PPV (2004) 0.12% Get price

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Rationale: From 1921 to 1990, vermiculite ore from Libby, Montana, was shipped worldwide for commercial and residential use. A 1980 study of a manufacturing facility using Libby vermiculite was the first to demonstrate a small but significant prevalence of pleural chest radiographic changes associated with amphibole fibers contained in the ore. Get price

Vermiculite Analysis Guidance Update

• Ore is up to 20% asbestos, airborne particles up to 40% asbestos (Grace insisted ore was 1% asbestos) Samples Vermiculite Containing Materials (VCM) • April 8, 2011 – ELAP releases frequently asked questions (FAQs) regarding asbestos/fibers Get price

DEPARTMENT OF HEALTH HUMAN SERVICES

2004/12/7the vermiculite ore used by these facilities came from three domestic sources and one international source. HETA 2002-0407: Vermiculite Technical Assistance to OSHA - Close-out Report Page 2 NIOSH collected bulk and air samples (personal breathing zone Get price

U.S. Government Accountability Office

EPA found historical data collected by the Mine Safety and Health Administration (MSHA) indicating that vermiculite ore from ia Vermiculite did not contain detectable levels of asbestos. However, EPA found that air and soil samples collected by MSHA at the ia Vermiculite mine in August and December 2000 did contain asbestos. Get price

Incidental Vermiculite Building Insulation Exposure FAQs

Exfoliated vermiculite was sold for use in fertilizer and in fire proof doors. Some of the exfoliated vermiculite waste had been placed in a local landfill. An IMC official said Koos purchased vermiculite ore from American Vermiculite (a South African mine) and from Get price

Technique to Detect Vermiculite

US Geological Survey Scientists Develop Technique to Detect Vermiculite Scientists from the United States Geological Survey (USGS) announced this week that they have developed an onsite technique that will allow building inspectors to determine whether vermiculite insulation contains amphibole asbestos. An article about the novel technique was published this week in the periodical American Get price

Mss spectral parameters for vermiculite ore.

2019/2/13Reflectance spectra of the insulation samples show vibrational overtone and combination absorptions that vary in wavelength position and relative intensity depending on elemental composition and proportions of their constituent micas (i.e., vermiculite ore usually Get price

Gregg Swayze

This dataset contains results from electron microprobe analyses for expanded and unexpanded vermiculite samples. These data are provide for samples of vermiculite ore, expanded vermiculite insulation, horticultural products, aggregate, and packing materials derived from mines near Enoree, South Carolina; Libby, Montana; Louisa, ia; Palabora, South Africa; Jiangsu, China; and Llano, Get price

Asbestos Vermiculite Building Insulation FAQs

The ore was shipped to the facility by truck and rail and the exfoliation process was performed indoors. EPA did not see any evidence of vermiculite on the site. On April 3, 2001, EPA collected five soil samples at the site and analyzed them using polarized light Get price

Spectroscopy of Expanded Vermiculite Products and

This dataset contains descriptions and analytical data (i.e., electron microprobe, X-ray diffraction, spectral reflectance, and scanning electron microprobe analyses) for unexpanded and expanded vermiculite samples. These data are provided for 52 samples of Get price

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.[2] Large commercial vermiculite mines Get price

U.S. Government Accountability Office

samples taken? Results of evaluation 6 2651 Manila Road, Dallas, Texas Former exfoliation facility 396,910 Yes-February 15, 2000; March 8, 2000 Yes According to an EPA database compiled from W.R. Grace shipping invoices, 396,910 tons of vermiculite ore Get price

Vermiculite on eBay catches EPA eye

Vermiculite on eBay catches EPA eye by Brent Shrum, Kootenai Valley Record October 15, 2008 The Environmental Protection Agency is intervening to stop the sale of potentially hazardous samples of Libby vermiculite ore on eBay. A local citizen called me up Get price