File:Explosives (1917) (14777354474).jpg

Identifier: explosives01mars (find matches)
Title: Explosives
Year: 1917 (1910s)
Authors: Marshall, Arthur, 1873-
Subjects: Explosives
Publisher: Philadelphia, P. Blakiston, 1917
Contributing Library: NCSU Libraries
Digitizing Sponsor: NCSU Libraries

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mi waste acid-, tanks, pipes and otherappliances of either iron or lead can be used and last for a very long time.Iron i- cheaper in first cost, but lead can be sold for a good price after it hasbeen u-ed : iron ha- the further advantage that it can be fitted up by anyskilled workman, whereas lead can only be joined by a lead burner. Specialsorts of iron are made, such as tantiron. duriron and eorrosiron. which resistacids particularly well, so that they can even be used for concentratingsulphuric acid and condensing nitric acid. These metals are very rich insilicon and are consequently more brittle than ordinary cast iron. OrdinaryL-hi-h wrought-iron steam piping fulfils most of the purposes of an acid factory.Storage tanks can also be made of iron or steel boiler -plates. Strong nitricacid ha- little action upon iron, but the dilute acid dissolves it rapidly. Thevapour that rises from the surface of the acid is much more dilute than the 1 .So /. .. woL vii.. L894, j». 91.
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w/////////y/////////y///////^ VOL. I. Fig. 26. Keetner Automatic Elevator or Egg 129 130 EXPLOSIVES acid itself, and where this condenses it is liable to attack iron strongly.Consequently it is better to use vessels and pipes of lead for this acid.Stone-ware is also used very largely withnitric acid. Posed silica ware, such asvitreosil, i> however better, especially wherehot acids are dealt with, as its coefficient ofexpansion is very small and consequentlythere is very little tendency to crack. Foruse at high temperatures a proportion ofzirconium or titanium oxide is added toprevent devitrification of the silica. Con-densers for nitric acid, basins of cascadeplants for the concentration of sulphuricacid, caps for Kessler plants and manyother articles are made of this material.Aluminium is also sometimes used a- amaterial of construction for acid plant, butin most cases possess-no advantage over ironor lead.Raising acid. Where acid i> running in a continuous streamone of the bes

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