File:AluminumFromClay 006.jpg
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Captions
Summary
[edit]DescriptionAluminumFromClay 006.jpg | Preliminary roasting at a moderate temperature is the first step in the hydrochloric acid process developed at the National Bureau of Standards for the production of aluminum from clay. The powdered clay is stirred by rabble arms (visible within the furnace door) as it passes downward in the triple-hearth Wedge furnace. Roasting increases the solubility of the alumina content so that it may be dissolved out with dilute hydrochloric acid and thus separated from the silicon, which remains as silica, insoluble in acid. | ||||
Date | 5/1/1947 | ||||
Source | National Institute of Standards and Technology | ||||
Author | National Institute of Standards and Technology | ||||
Permission (Reusing this file) |
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Licensing
[edit]Public domainPublic domainfalsefalse |
This image is in the public domain in the United States because it is a work of the United States Federal Government, specifically an employee of the National Institute of Standards and Technology, under the terms of Title 17, Chapter 1, Section 105 of the US Code.
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current | 19:02, 6 March 2014 | 4,776 × 6,027 (2.05 MB) | NISTResearchLibrary (talk | contribs) |
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Metadata
This file contains additional information such as Exif metadata which may have been added by the digital camera, scanner, or software program used to create or digitize it. If the file has been modified from its original state, some details such as the timestamp may not fully reflect those of the original file. The timestamp is only as accurate as the clock in the camera, and it may be completely wrong.
Image title |
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Author | National Institute of Standards and Technology |
Copyright holder |
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Credit/Provider | National Institute of Standards and Technology |
Source | Aluminum from Clay Photograph Collection |
Short title |
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Date and time of data generation | 1 May 1947 |
Width | 4,776 px |
Height | 6,027 px |
Bits per component |
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Compression scheme | Uncompressed |
Pixel composition | RGB |
Orientation | Normal |
Number of components | 3 |
Horizontal resolution | 600 dpi |
Vertical resolution | 600 dpi |
Data arrangement | chunky format |
Software used | Adobe Photoshop CS5 Windows |
File change date and time | 15:54, 12 February 2013 |
Exif version | 2.21 |
Color space | Uncalibrated |
Image width | 4,776 px |
Image height | 6,027 px |
Original transmission location code | 16233-1 |
Copyright status | Copyright status not set |
Date metadata was last modified | 11:00, 12 February 2013 |
Date and time of digitizing | 02:41, 29 January 2013 |
Unique ID of original document | xmp.did:913A136B5675E21197A3CF50644ABE3E |
Keywords |
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Contact information | library@nist.gov
100 Bureau Dr, MS 2500 Gaithersburg, MD, 20899 |
IIM version | 2 |