Last edited by Vogis
Thursday, May 14, 2020 | History

2 edition of Electric smelting of Montana chromite concentrates found in the catalog.

Electric smelting of Montana chromite concentrates

Willard L. Hunter

Electric smelting of Montana chromite concentrates

by Willard L. Hunter

  • 43 Want to read
  • 18 Currently reading

Published by U.S. Dept. of the Interior. Bureau of Mines in Washington, DC .
Written in English

    Subjects:
  • Chromite ores -- Montana.,
  • Chromite -- Electrometallurgy.

  • Edition Notes

    1

    Statementby W.L. Hunter and Lloyd H. Banning.
    SeriesReport of investigations (United States. Bureau of Mines) -- 5775
    ContributionsBanning, Lloyd Harold, 1909-, United States. Bureau of Mines.
    The Physical Object
    Paginationii, 30 p. :
    Number of Pages30
    ID Numbers
    Open LibraryOL21743704M

    well as the burning of external fuel. The reverberatory furnace smelting operation is a continuous process. Electric arc smelting furnaces generate heat with carbon electrodes that are lowered through the furnace roof and submerged in the slag layer of the molten bath. . concentrates from its own mines as well as feeds from third parties which includes concentrates and other materials bearing nickel and cobalt as well as other pay metals. These feeds are blended into the process at various stages depending on composition. One of the entry points is the Calciner, which.

    As mentioned earlier, chromite ores contain iron oxides and gangue which have significant effects on the reduction reactions in submerged are smelting. Studies on solid-state reduction of chromite have shown that the iron oxides get reduced more readily than the chromite oxides Under such conditions, iron. The U.S. Bureau of Mines compared column flotation using either fine or coarse bubbles with conventional flotation on a Montana chromite ore. On deslimed ore, fine-bubble column flotation produced a % Cr2O3-grade rougher concentrate with 87% recovery, compared with % and % Cr2O3-grade rougher concentrates with 85% and 77% recovery for coarse-bubble column flotation and .

      The US Bureau of Mines compared column flotation using either fine or coarse bubbles with conventional flotation on a Montana chromite ore. On deslimed ore, fine-bubble column flotation produced a % Cr2O3-grade rougher concentrate with 87% recovery, compared with % and % Cr2O3-grade rougher concentrates with 85% and 77% recovery for coarse-bubble column Cited by: 8. Chromite, the principle ore of the element chromium, is a commercially valuable mineral. However, due to mining restrictions and the fact that Chromite is not commonly found in crystallized form, it is not well-represented in mineral collections.


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His Grace John Duke of Roxburgh, appellant. James Wauchope of Edmonstoun Esq; respondent. Et é contra. The case of James Wauchope of Edmonstoun respondent in the original, and appellant in the cross-appeal

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Electric smelting of Montana chromite concentrates by Willard L. Hunter Download PDF EPUB FB2

Electric smelting of Montana chromite concentrates (OCoLC) Material Type: Government publication, National government publication: Document Type: Book: All Authors / Contributors: W L Hunter; Lloyd Harold Banning; United States.

Bureau of Mines. Electric smelting of low-grade chromite concentrates (OCoLC) Material Type: Government publication, National government publication: Document Type: Book: All Authors / Contributors: John P Walsted; United States.

Bureau of Mines. The Wile electric furnace is adapted to, and in many instances has been used successfully for, the smelting of gold and silver ores, concentrates, cyanide precipitates, tin concentrates, soft-metal drosses, lead and lead-silver ores, battery plates, copper scale, copper ores, manganese copper, and for the recovery of metallic values remaining.

Even though the book is a little outdated, many smelting operations in the world still operate very old equipment with processing techniques that have not changed in decades.

This makes Robiette still relevant and indeed essential today. I was very lucky to find a copy. If you own one - hold on to it.5/5(1). The bulk chemical composition of the chromite concentrates examined were determined by Induction Coupled Plasma Optical Emission Spectrometry (ICP-OES) and are shown in Table 1 together with some typical South African examples for comparison.

ferrochromium – Pretreatment for Size: 1MB. The Electric Smelting and Aluminum Company, founded as Cowles Electric Smelting and Aluminum Company, and Cowles Syndicate Company, Limited, formed in the United States and England during the mids to extract and supply valuable metals.

Founded by two brothers from Ohio, the Cowles companies are remembered for producing alloys in quantity sufficient for ry: Aluminum, bronze, carborundum, copper, alloys. The advantages of flash smelting over roasting/electric furnace melting are that flash smelting: (1) requires much less energy than electric smelting and (2) avoids the electric furnace’s emission of weak SO 2 gas [31].

It is also a high production rate process, perfectly matched to the 50–μm particles in froth flotation concentrates. ri / electric smelting of montana chromite concentrates, pb, $ 10 ri / oil-well logging with model equipment: tests on noninvaded thin beds with shielded electrodes, pb, $ 18 ri / experimental extraction of gold and silver ores from california and nevada ores, pb, $ Roasting and Electric Furnace Smelting.

Roasting/ electric furnace smelting accounts for about 1/4 of Ni sulfide smelting [28]. It entails (1) partially oxidizing Ni concentrate in a fluid bed roaster and (2) melting the resulting calcine plus silica flux in an electric furnace to.

Conventional Smelting Process The traditional chromite smelting technology involves charging the chromite ore into a submerged AC Electric Arc. ferroalloys with the expressed objective of smelting ore fines. Chromite smelting slag processing line is mainly to recover the chromite alloy from the chrome smelting slag.

For this processing line, not only the smelting alloy can be recovered, but also the. Smelting is a process of applying heat to ore in order to extract a base is a form of extractive is used to extract many metals from their ores, including silver, iron, copper, and other base ng uses heat and a chemical reducing agent to decompose the ore, driving off other elements as gases or slag and leaving the metal base behind.

The Montana Department of Environmental Quality is charged with protecting a clean and healthy environment as guaranteed to our citizens by our State Constitution. Our ultimate goal is to protect public health and to maintain Montana's high quality of life for current and future generations.

Electric smelting and refining: the extraction and treatment of metals by means of the electric current by Borchers, Wilhelm, ; McMillan, Walter G. (Walter George),tr. Smelting. Propane Gas Furnaces; Electric Furnaces; Pulverizing; Smelting Refining Melting Equipment. Showing all 14 results.

Sort by Default Order. Sort by Default Order; Sort by Name; Sort by Price; Sort by Date; Sort by Popularity; Show 50 Products. Chromite is a mineral that contains chromium. It is considered a strategic mineral, which generally means that it is necessary for military and industrial use during periods of national emergency.

The strategic mineral concept was created during World War I and became law just prior to World War II with the passage of the Strategic Minerals Act. Technology Innovations in the Smelting of Chromite Ore Chima Ugwuegbu Department of Materials and Metallurgical Engineering Federal University of Technology, P.M.B.Owerri, Nigeria E-mail: [email protected] Abstract The increasing costs of electric energy and thus the need to reduce the energy required to produce ferrochrome fromAuthor: Chima Ugwuegbu.

• In chromite and slag smelting an alloy is the target, whereas in ilmenite smelting the slag is the main pr oduct and pig iron a by-product.

• In all cases iron oxides are reduced, but. Smelting gold and silver is an important procedure. Once gold and silver precipitate is smelted, gold and silver ingots can be recovered.

These Silver and gold ore – precipitate (concentrate) is the product of Merrill-Crowe process or other similar process. The smelting process involves the use of an induction smelting furnace. Chromite boulders and sand are therefore, as a rule, more abundant in the surface soil than in the solid serpentine beneath.

Many pros­ pectors who find boulders of chromite on the surface feel confident that there is a large body of chromite beneath, but a few shallowAuthor: J.S. Diller.First of all, you must have gold or silver in your concentrates to begin with and the more of it the better.

The microwave gold smelting kiln is a tool for smelting only. It does not separate out the precious metals that are in your concentrates. You still need to have your end product called "buttons" assayed to determine its purity and content.Case Study: Chromite mining and health concerns 5 Chromium mining and processing In nature, chromium is found as chromite ore, composed of elemental iron, oxygen and chromium (FeOCr 2 O 3).

1,2 heavily in about a m vicinity around the Countries with commercially significant chromite mines include Russia, South Africa, Zimbabwe, Turkey, theFile Size: KB.