Chapter I: Preface

This book is a reprint of various articles pertaining especially to the smelting and refining of lead, together with a few articles relating to the mining of lead ore, which have appeared in the _Engineering and Mining Journal_, chiefly during the last three years; in a few cases articles from earlier issues have been inserted, in view of their special importance in rounding out certain of the subjects treated. For the same reason, several articles from the _Transactions_ of the American Institute of Mining Engineers have been incorporated, permission to republish them in this way having been courteously granted by the Secretary of the Institute. Certain of the other articles comprised in this book are abstracts of papers originally presented before engineering societies, or published in other technical periodicals, subsequently republished in the _Engineering and Mining Journal_, as to which proper acknowledgment has been made in all cases.

The articles comprised in this book relate to a variety of subjects, which are of importance in the practical metallurgy of lead, and especially in connection with the desulphurization of galena, which is now accomplished by a new class of processes known as “Lime Roasting” processes. The successful introduction of these processes into the metallurgy of lead has been one of the most important features in the history of the latter during the last twenty-five years. Their development is so recent that they are not elsewhere treated in technical literature, outside of the pages of the periodicals and the transactions of engineering societies. The theory and practice of these processes are not yet by any means well understood, and a year or two hence we shall doubtless possess much more knowledge concerning them than we have now. Prompt information respecting such new developments is, however, more desirable than delay with a view to saying the last word on the subject, which never can be said by any of us, even if we should wait to the end of the lifetime. For this reason it has appeared useful to collect and republish in convenient form the articles of this character which have appeared during the last few years.

W. R. INGALLS.

AUGUST 1, 1906.

CONTENTS

PART I

NOTES ON LEAD MINING
PAGE

SOURCES OF LEAD PRODUCTION IN THE UNITED STATES (WALTER
RENTON INGALLS) 3

NOTES ON THE SOURCE OF THE SOUTHEAST MISSOURI LEAD (H. A.
WHEELER) 10

MINING IN SOUTHEASTERN MISSOURI (WALTER RENTON INGALLS) 16

LEAD MINING IN SOUTHEASTERN MISSOURI (R. D. O. JOHNSON) 18

THE LEAD ORES OF SOUTHWESTERN MISSOURI (C. V. PETRAEUS AND
W. GEO. WARING) 24

PART II

ROAST-REACTION SMELTING

SCOTCH HEARTHS AND REVERBERATORY FURNACES

LEAD SMELTING IN THE SCOTCH HEARTH (KENNETH W. M. MIDDLETON) 31

THE FEDERAL SMELTING WORKS, NEAR ALTON, ILL. (O. PUFAHL) 38

LEAD SMELTING AT TARNOWITZ (EDITORIAL) 41

LEAD SMELTING IN REVERBERATORY FURNACES AT DESLOGE, MO.
(WALTER RENTON INGALLS) 42

PART III

SINTERING AND BRIQUETTING

THE DESULPHURIZATION OF SLIMES BY HEAP ROASTING AT BROKEN
HILL (E. J. HORWOOD) 51

THE PREPARATION OF FINE MATERIAL FOR SMELTING (T. J. GREENWAY) 59

THE BRIQUETTING OF MINERALS (ROBERT SCHORR) 63

A BRICKING PLANT FOR FLUE DUST AND FINE ORES (JAS. C. BENNETT) 66

PART IV

SMELTING IN THE BLAST FURNACE

MODERN SILVER-LEAD SMELTING (ARTHUR S. DWIGHT) 73

MECHANICAL FEEDING OF SILVER-LEAD BLAST FURNACES (ARTHUR S.
DWIGHT) 81

COST OF SMELTING AND REFINING (MALVERN W. ILES) 96

SMELTING ZINC RETORT RESIDUES (E. M. JOHNSON) 104

ZINC OXIDE IN SLAGS (W. MAYNARD HUTCHINGS) 108