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Thursday, July 23, 2020 | History

2 edition of Reactivity of AN-FO with pyrite containing weathering products found in the catalog.

Reactivity of AN-FO with pyrite containing weathering products

Yael Miron

Reactivity of AN-FO with pyrite containing weathering products

by Yael Miron

  • 147 Want to read
  • 11 Currently reading

Published by Dept. of the Interior, Bureau of Mines in [Washington] .
Written in English

    Subjects:
  • Ammonium compounds.,
  • Nitrates.,
  • Pyrites.,
  • Chemical reactions.

  • Edition Notes

    Includes bibliographical references.

    Statementby Yael Miron, Thomas C. Ruhe, and Richard W. Watson.
    SeriesReport of investigations - Bureau of Mines ; 8373, Report of investigations (United States. Bureau of Mines) -- 8373.
    ContributionsRuhe, Thomas C., Watson, Richard William, 1927-, United States. Bureau of Mines.
    The Physical Object
    Pagination24 p. :
    Number of Pages24
    ID Numbers
    Open LibraryOL15233186M

    Pyrite is commonly found to contain minor nickel, and forms a series with Vaesite; Bravoite is a nickeloan variety of pyrite. It usually contains minor cobalt too and forms a series with Cattierite. Many pyrites contain minor As, see Arsenian Pyrite. Pb-bearing pyrite has . Pyrite, also called iron pyrite or fool’s gold, a naturally occurring iron disulfide mineral. The name comes from the Greek word pyr, “fire,” because pyrite emits sparks when struck by metal. Pyrite is called fool’s gold; to the novice its colour is deceptively similar to that of a gold nugget.

    The porous/spongy pyrite contains more gold grains locked within it (% locked in sulphide), compact pyrite is the second gold host (associated with poly-mineral boundary) and euhedral pyrite the least (gold occurring in boundary between it and silicates and to some extent occluded on it). Oct 03,  · FIG. 3 is a graph illustrating data obtained from testing of emulsion explosives of the present invention and of the prior art. FIG. 4 is a graph illustrating the effectiveness of a range of zinc oxide concentrations as an inhibitor of the reactivity of ammonium nitrate .

    Acid mine drainage (AMD) has been the subject of intensive research since the 's. Research removes constraints on pyrite weathering and allows the reactions to proceed rapidly. The role of provides optimal conditions for the oxidation and subsequent leaching of pyrite and associated weathering products. Ground-water flow paths and. Pyrite cubes with similar size (approximately × × cm 3) were selected for the mineral-solution contact experiment. Pyrite surfaces are readily reactive when exposed to air. Pyrite oxidation products are expected to be present on the surfaces of any naturally occurring pyrite saltybreezeandpinetrees.com by:


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Reactivity of AN-FO with pyrite containing weathering products by Yael Miron Download PDF EPUB FB2

Get this from a library. Reactivity of AN-FO with pyrite containing weathering products. [Yael Miron; Thomas C Ruhe; Richard William Watson; United States. Bureau of Mines.]. Reactivity of AN-FO with pyrite containing weathering products / by Yael Miron, Thomas C.

Ruhe, and Richard W. Watson. The results of tests in a heated vessel simulating a hot borehole demonstrate that small amounts of ferrous sulfate, a major product of pyrite weathering, initiate a self-sustained exothermic reaction with AN-FO at 80 deg c.

Five percent by weight of urea was found sufficient to prevent a reaction among the three ingredients, at least within the limits of the test, which reached deg c.

Smaller amounts of. Reactivity of AN-FO with pyrite containing weathering products. by Yael Miron Reactivity of ANFO with pyrite containing weathering products-evaluation of additional inhibitors Get it as soon as Thu, Jul FREE Shipping on orders over $25 shipped by Amazon. The reactivity of aluminized AN-FO with pyrite-bearing ores.

by Yeal. Miron. Reactivity of AN-FO with pyrite containing weathering products / By Yael. Miron, joint author. Richard William Watson and joint author. Thomas C. Ruhe. Abstract. Includes bibliographical saltybreezeandpinetrees.com of access: Internet.

Reactivity of ANFO with pyrite containing weathering products: evaluation of additional inhibitors. Reactivity of ANFO with pyrite Reactivity of AN-FO with pyrite containing weathering products book weathering products. [Avondale, Md.]: U.S.

Dept. of the Interior, Bureau of Mines, (OCoLC) Material Type: Government publication, National government publication: Document Type: Book. Based on the analysis of the results from the present study, it is proposed that the overall exothermic reaction at about ∘ C is a reaction between melted ammonium nitrate and pyrite, as both NO and SO 2 were produced in the initial stage of the reactions followed by the other products of ammonium nitrate decomposition, namely, NH 3, H 2 O and N 2 O, at higher temperatures, as shown in Fig.

saltybreezeandpinetrees.com by: Dec 20,  · As NH 4 NO 3, contains nitrogen in both oxidizable and reducible form, and FeS 2 contains oxidizable and reducible species, it was predicted that the reactive ground reaction mechanism would be redox-based, and so electrochemical techniques such as cyclic voltammetry could be used to examine these reactions and deduce the interactions between saltybreezeandpinetrees.com: Gregory Conroy, Kelly Robinson, Fiona Beach, Scott W.

Donne. generated from arsenopyrite and pyrite weathering, and to assess the potential environmental risk of such wastes. (OH) found as the main weathering minerals MATERIALS AND METHODS. of the orange Samples of vein fragments containing quartz, muscovite, sulfides (arsenopyrite, the most abundant, and pyrite) and weathering products.

There are four commonly accepted chemical reactions that represent the chemistry of pyrite weathering to form AMD.

An overall summary reaction is as follows: 4 FeS 2 + 15 O 2 + 14 H 2 O => 4 Fe(OH) 3 ¯+ 8 H 2 SO 4 Pyrite + Oxygen + Water => "Yellowboy" + Sulfuric Acid. Sep 01,  · The Products of Weathering and Erosion The products of weathering and erosion are the unconsolidated materials that we find around us on slopes, beneath glaciers, in stream valleys, on beaches, and in saltybreezeandpinetrees.com: Steven Earle.

Wherever pyrite can come into contact with oxygen and water a potential problem exists. This trio of pyrite, oxygen and water gets the ball rolling in the formation of AMD.

Let's examine how. When pyrite is initially exposed to oxygen and water the following reaction can occur 4FeS 2(s) +. Dec 22,  · The temperature of these ores can increased by the continuous, though are times, oxidation weathering of the pyrite and the reaction becomes self-sustained at ±10O C.

Sep 01,  · Oxidation is another very important chemical weathering process. The oxidation of the iron in a ferromagnesian silicate starts with the dissolution of the iron.

For olivine, the process looks like this, where olivine in the presence of carbonic acid is converted to dissolved iron, carbonate, Author: Steven Earle. Reactivity of AN-FO with pyrite containing weathering products Yael Miron Read.

Liquid-liquid contact in vapor explosion4 books A. Borisov, 3 books Jones, G2 books International Colloquium on Gasdynamics of Explosions and Reactive Systems (8th Minsk, Byelorussian S.S.R.), 2 books Centre national de la recherche. Weathering of pyrite is particularly destructive because of the attendant volume and stress increases that occur with oxidation and the chemical reactions that follow between the oxidation products and other components of pyrite bearing strata.

Pyrite oxidation reactions also produce sulphuric acid. Pyrite is a common accessory mineral in sedimentary rocks, particularly in limestone, sandstone and carbonaceous siltstones or shales.

Some times we wonder who and why it got there; and what does it mean for petroleum exploration. Originally the iron came from the weathering of older igneous or metamorphic rocks. pyrite to act as a source of sulphide for canister corrosion during this latter long­term anaerobic phase, although it is important to understand that the original pyrite phase may have been exten­ sively altered during the intervening periods.

Pyrite is an Fe(II) polysulphide with a cubic crystal structure and exhibits semiconducting properties.

Pyrite and marcasite are minerals common in mine environments that cause acid generation. Many other sulfide minerals are present in mining environments which may or may not form acid upon weathering. Pyrite is considered the most common of the sulfide minerals. Pyrite's metallic luster and pale brass-yellow hue give it a superficial resemblance to gold, hence the well-known nickname of fool's gold.

The color has also led to the nicknames brass, brazzle, and Brazil, primarily used to Crystal class: Diploidal (m3), H-M symbol: (2/m 3). Oct 19,  · As neither inorganic pyrite oxidation nor CO 2-driven weathering can produce levels of acidity below pH ∼ (see Supplementary Information section 4), Cr Cited by: Variations in pyrite reactivity are known to exist within samples collected from different areas.

Using samples collected from acid and nonacid sites, the relationship between the factors affecting pyrite oxidation and observed variations in pyrite reactivity was studied.The products of pyrite oxidation, including solution phase Fe2+, Fe3+, S2O, S4O, SO and SO and solid phase Fe(OH)3, were measured under controlled conditions in order to investigate the behavior of pyrite in calcareous and alkaline soils.

The distribution of sulfur oxidation products is pH dependent and can be interpreted in terms of metastable equilibrium among thiosulfate Cited by: 1.