asbestos tailings calcium

asbestos tailings calcium 1 asbestos tailings calcium 2


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US4604140A - Foundry sands derived from serpentine and ,

There is disclosed a granular product suitable for use as foundry sands and obtained from asbestos tailings calcined at a temperature of from 1250° to 1450° C, said asbestos tailings having an MgO:SiO 2 ratio greater than 10, the granules constituting the granular product being characterized by having a thermal expansion at 1000° C of not more than 10% and a particle size of between -20 ....

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Effects of weathering on the surface and chemical ,

effects of weathering on the surface and chemical properties of chrysotile asbestos: implications for management of naturally occurring asbestos and carbon dioxide sequestration in ultramafic mine tailings by emma holmes bsc....

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102 MAGNESIUM METAL1

A company in Quebec, Canada, produced a limited amount of magnesium from serpentine contained in asbestos tailings at its 200-ton-per-year pilot plant and was planning to construct a 50,000-ton-per-year plant Another company was testing its process for producing magnesium from serpentine-bearing asbestos tailings in the same region of Quebec...

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Characterization and Control of Asbestos Emissions from ,

EPA-650/2-74-090 CHARACTERIZATION AND CONTROL OF ASBESTOS EMISSIONS FROM OPEN SOURCES by C F Harwood and T P Blaszak IIT Research Institute 10 West 35th Street Chicago, Illinois 60616 Contract No 68-02-1348 ROAP No 21AFA-004 Program Element No IAB015 EPA Project Officer: D K, Oestreich Control Systems Laboratory National Environmental Research Center ,...

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ASBESTOS (CHRYSOTILE, AMOSITE, CROCIDOLITE, TREMOLITE ,

Asbestos was considered by previous IARC Working Groups in 1972, 1976, and 1987 (IARC, 1973, 1977, 1987a) Since that time, new data have become available, these have been incorporated in the Monograph, and have been taken into consideration in the present evaluation...

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Sustainability | Free Full-Text | Opportunities for ,

This paper discusses using alkaline mine and coal-fired power station waste (fly ash, red mud, and ultramafic mine tailings, ie, nickel, diamond, PGE (platinum group elements), and legacy asbestos mine tailings) as the feedstock for CCUS to produce environmentally benign materials, which can be used in mine reclamation...

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Canadian Perspective on SF Management from Magnesium ,

(magnesium/calcium carbonate) is crushed, calcined, and reduced by ferrosilicon in a vacuum retort Magnesium is condensed from the vapour phase producing high purity metal The technology used by Noranda involves production of magnesium from asbestos tailings using a proprietary electrolytic process Energy Use...

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US4434239A - Process for manufacturing cordierite ,

A process for the manufacture of industrial cordierite ceramic units containing from 45 to 68% by weight of silica 16 to 37% by weight of magnesia and 12 to 45% by weight of alumina which comprises (a) mixing from 15 to 60% by weight of the non-magnetic fraction of asbestos tailings having a MgO:SiO 2 of from 08 to 125 with 40 to 85% of a kaolin clay by weight and 0 to 10% of alumina; (b ....

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Asbestos tailings become a resource - Canadian Consulting ,

Asbestos tailings become a resource MININGThe discarded serpentine tailings from decades of asbestos mining have created a "lunar landscape" that stretches for eight miles near the town named after the mineral north of Sherbrooke, Quebe....

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102 MAGNESIUM METAL1

A company in Quebec, Canada, produced a limited amount of magnesium from serpentine contained in asbestos tailings at its 200-ton-per-year pilot plant and was planning to construct a 50,000-ton-per-year plant Another company was testing its process for producing magnesium from serpentine-bearing asbestos tailings in the same region of Quebec...

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EP0038467A2 - Shaped structure made by molding a calcined ,

There is provided a molded shaped structure made by molding the reaction product of an organic resin and a modified magnesium silicate obtained by calcining chrysotile asbestos tailings The new product is characterized by the absence of any fibers...

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Introduction: History, Production, Applications, and Markets

tained in the tailings from asbestos mines (Ref 9) The tailings are leached with a strong hydro­ chloric acid in a novel process to produce MgClz solution, which is purified by pH adjustment and ion exchange techniques to generate a concen­ trated ultra-high-purity brine for dehydration and electrolysis...

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(PDF) Complex Processing of Wastes Generated in Chrysotile ,

In the Magnola process, magnesium metal is produced by the electrolysis of anhydrous MgCl2 derived from the leaching of serpentine, which is the major constituent (>90%) of asbestos tailings...

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EP0038467A2 - Shaped structure made by molding a calcined ,

There is provided a molded shaped structure made by molding the reaction product of an organic resin and a modified magnesium silicate obtained by calcining chrysotile asbestos tailings The new product is characterized by the absence of any fibers...

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Mining and Mineral Processing Sites - US EPA

The main asbestos tailings pile is located in the east fork of Pine Canyon Creek Erosion has created gullies 15 feet wide and 10 feet deep in the down slope of the tailings pile despite the presence of a small dam below the tailings pile The main contaminant of concern is chrysotile asbestos...

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Asbestos MSDS datasheet & applicatoin notes - Datasheet ,

Asbestos Asbestos is a collective term for a specific group of natural silicate minerals with a , Germany's Gefahrstoffverordnung from 15 November 1999 bans the use and manufacture of asbestos ,...

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US4434239A - Process for manufacturing cordierite ,

A process for the manufacture of industrial cordierite ceramic units containing from 45 to 68% by weight of silica 16 to 37% by weight of magnesia and 12 to 45% by weight of alumina which comprises (a) mixing from 15 to 60% by weight of the non-magnetic fraction of asbestos tailings having a MgO:SiO 2 of from 08 to 125 with 40 to 85% of a kaolin clay by weight and 0 to 10% of alumina; (b ....

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Characterization and Control of Asbestos Emissions from ,

----- SECTION 8 THE SIGNIFICANCE OF ASBESTOS EMISSIONS ' ' FROM OPEN SOURCES INTRODUCTION The preliminary asbestos emission data obtained at the Coalinga, Waukegan, and Denison sites, and the data from Ambler supplied by the EPA, gave information on the concen- tration of fibers to be found in the ambient air at or near to these sites, To ....

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Introduction: History, Production, Applications, and Markets

tained in the tailings from asbestos mines (Ref 9) The tailings are leached with a strong hydro­ chloric acid in a novel process to produce MgClz solution, which is purified by pH adjustment and ion exchange techniques to generate a concen­ trated ultra-high-purity brine for dehydration and electrolysis...

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104 MAGNESIUM METAL1

produce magnesium and magnesium compounds from asbestos tailings in Quebec, Canada One of the companies proposed to build a 50,000-ton-per-year plant if its pilot-plant tests proved economically feasible A company in Australia was conducting a feasibility study for a 5,000-ton-per-year plant to recover magnesium from coal fly ash...

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Mining and Mineral Processing Sites - US EPA

The main asbestos tailings pile is located in the east fork of Pine Canyon Creek Erosion has created gullies 15 feet wide and 10 feet deep in the down slope of the tailings pile despite the presence of a small dam below the tailings pile The main contaminant of concern is chrysotile asbestos...

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Thermal process and mechanism of phase transition and ,

Aug 01, 2019· The phase compositions of the raw material asbestos tailings and pre-fired material were shown in Fig 1 The asbestos tailings sample mainly contained serpentine and a small amount of dolomite, brucite and magnetite The pre-fired material mainly contained forsterite and a small amount of periclase, hematite and calcium oxide...

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Effects of weathering on the surface and chemical ,

effects of weathering on the surface and chemical properties of chrysotile asbestos: implications for management of naturally occurring asbestos and carbon dioxide sequestration in ultramafic mine tailings by emma holmes bsc....

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Light colored and low density mineral filler from ,

Oct 30, 1984· Another method comprises leaching a slurry of asbestos tailings and a source of calcium such as calcium carbonate, calcium oxide or calcium hydroxide with an excess of carbon dioxide whereby calcium carbonate is precipitated on the surface of the asbestos tailings and after separating the thus coated asbestos tailings subjecting same to ....

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102 MAGNESIUM METAL1

company in Quebec, Canada, started production of magnesium from serpentine contained in asbestos tailings at its 200-ton-per-year pilot plant and was planning to construct a 50,000-ton-per-year plant Another company was testing its process for producing magnesium from serpentine-bearing asbestos tailings in the same region of Quebec A...

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US4430157A - Calcined serpentine as inorganic charge in ,

The procedure of Example I was repeated except that in one case the calcined asbestos tailings were replaced by the same amount of untreated asbestos tailings having a mesh size of from -200 to +325 mesh, and, in another case, by calcium carbonate also having a mesh size of from -200 to +325 mesh...

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Growth characteristics of selected plant species on ,

asbestos tailings from Msauli Mine, eastern Transvaal Karen S Ellery and BH Walker Department of Botany, University of the Witwatersrand, Johannesburg Natural revegetation on the asbestos tailings at Msauli Mine is negligible Lack of available phosphorus, potassium and calcium, extremely alkaline conditions and surface crusting...

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(PDF) Complex Processing of Wastes Generated in Chrysotile ,

In the Magnola process, magnesium metal is produced by the electrolysis of anhydrous MgCl2 derived from the leaching of serpentine, which is the major constituent (>90%) of asbestos tailings...

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Sustainability | Free Full-Text | Opportunities for ,

This paper discusses using alkaline mine and coal-fired power station waste (fly ash, red mud, and ultramafic mine tailings, ie, nickel, diamond, PGE (platinum group elements), and legacy asbestos mine tailings) as the feedstock for CCUS to produce environmentally benign materials, which can be used in mine reclamation...

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Recycling of asbestos tailings used as reinforcing fillers ,

In this work, asbestos tailings were recycled and used as reinforcing fillers to enhance the mechanical properties of polypropylene (PP) A silane coupling agent was used to chemically modify the ....

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