Book Description

Excerpt from Dr. Edward Kirk's System of Foundry Practice: Cupola Practice The word "Cupola" covers such a variety of objects that another word should be used in conjunction with it to indicate the object referred to. such as cupola furnace or foundry cupola, but to men familiar with foundry practice the word cupola is sufficient. The cupola, in the melting of iron, has many advantages over any other melting furnace for foundry work. It melts iron with less fuel and more cheaply than any other furnace, and can be run intermittently without any great damage due to expansion and contraction in heating and cooling. Large or small quantities of iron may be melted in the same cupola, and the longer it is kept in blast the smaller the per cent, of fuel required in melting. These advantages have made it the melting furnace almost exclusively used in gray iron foundry practice. Theoretically, a ton of iron can be melted in a cupola with 172 pounds of coke, but in practice 250 pounds are required in long heats, and in short heats 300 pounds. This is due to the same amount of fuel being required for the bed for a short heat as for a long heat. The reverberatory furnace, a limited number of which are used in grey iron foundries in melting for special castings, requires from ten to twenty hundredweight of fuel to melt a ton of iron. The pot furnace, in which the metal is melted in crucibles, requires a ton of fuel to melt a ton of iron. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.