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Limestone

Author: Films for the Humanities & Sciences (Firm); Films Media Group.; Granada Media (Firm)
Publisher: New York, N.Y. : Films Media Group, [2007], ©1987.
Series: Chemistry in action.; Films on Demand.
Edition/Format:   eVideo : Clipart/images/graphics : EnglishView all editions and formats
Summary:
Limestone, or calcium carbonate-made of the skeletons of billions of sea creatures-is mined in large quantities. Carefully blasted out of the ground, it is first crushed with huge pestles to eliminate large boulders, then passed through a series of sieves to separate large chunks for further crushing. When sufficiently small, it is washed to remove clay, dust, and sand. The grades are separated: some for  Read more...
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Details

Genre/Form: Videorecording
Educational films
Internet videos
Additional Physical Format: Originally produced:
Granada Media (Firm), 1987
Material Type: Clipart/images/graphics, Internet resource, Videorecording
Document Type: Internet Resource, Computer File, Visual material
All Authors / Contributors: Films for the Humanities & Sciences (Firm); Films Media Group.; Granada Media (Firm)
OCLC Number: 707964387
Notes: Films on Demand is distributed by Films Media Group for Films for the Humanities & Sciences, Cambridge Educational, Meridian Education, and Shopware.
Encoded with permission for digital streaming by Films Media Group on Feb. 21, 2007.
Title from distributor's description.
Target Audience: 11 & up.
Description: 1 streaming video file (20 min.) : sound, color, digital file.
Details: System requirements: FOD playback platform.; Mode of access: Internet.
Contents: Mining Limestone (4:53) --
Processing Limestone (4:27) --
Calcium Oxide: Quicklime (4:34) --
Calcium Hydroxide: Slaked Lime (2:28) --
Making Cement Powder (2:29).
Series Title: Chemistry in action.; Films on Demand.
Responsibility: Granada Media (Firm).

Abstract:

Limestone, or calcium carbonate-made of the skeletons of billions of sea creatures-is mined in large quantities. Carefully blasted out of the ground, it is first crushed with huge pestles to eliminate large boulders, then passed through a series of sieves to separate large chunks for further crushing. When sufficiently small, it is washed to remove clay, dust, and sand. The grades are separated: some for road-building, others for processing into sodium carbonate for glass-making. The sand from the wash is separated out and can be made into quicklime and subsequently into slacked lime; the remainder is processed to make cement powder.

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Primary Entity

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