A. R. Taylor

Robert C. Johnson

James S. Browning

Carl Rampacek

Paul Watson Johnson

Theodora Estelle Gardner

Frank A. Peters

Ralph C. Kirby

Haskiel Roy Shell

Albert W. Deurbrouck

Robert M. Doerr

Howard E. Powell

Julius Bruce Clemmer

R. S. Lang

Leo W. Higley

Hillary W. St. Clair

Robert S. Warfield

Richard D. Berkenkotter

P. L. Placek

Carl H. Schack

John S. Berber

Allan F. Smith

Fernando B. Petermann

John L. Miller (Jr.)

Stuart J. Hussey

Arthur L. Hiser

C. K. Miller

Henry P. Barthe

I. L. Turner

D. F. Smith

Samuel P. Polack

Model of Ideal Furnace at Equilibrium

Developing a Thermochemical Model for the Iron Blast Furnace

Henry Dolezal

Edward C. Perkins

Trap for Removing Ferric Chloride from Titanium Tetrachloride

Mark I. Copeland

John Ward Smith

Donald W. Frommer

David E. Wolfson

George W. Birge

Raynard V. Lundquist

Lloyd Harold Banning

Gerald V. Gibbs

Arthur F. Colombo

Eben L. Singleton

C. A. Stone

Karl Clyde Dean

Francis Harold Gibson

William Harlan Ode

Vernal E. Edlund

Thomas T. Campbell

Joe B. Rosenbaum

A. A. Berk

A. C. Rice

C. S. Tout

Carl J. Chindgren

Donald William Scott

G. W. Elger

Gene Asai

Wesley T. Holmes

Ralph V. Higgins

G. L. Hopps

Irving L. Turner

Ivan L. Nichols

J. P. McCullough

L. Carpenter

Lester C. Bauerle

W. Floyd Holbrook

Alan J. Leighton

F. Donald Bloss

Carbonizing Properties of Butler County, Pa., Coals

Pyrometallurgical studies by the Bureau of Mines demonstrated the feasibllity of sintering and smelting a low-grade flotation concentrate made by pilot-plant processing 10-percent manganese ore from the Maggie Canyon deposit, Mohave County, Ariz. Under optimum conditions 85 percent of the manganese in a flotation concentrate that assayed 36 percent manganese was recovered as standard ferromanganese. A blend of this flotation concentrate with high-grade dithionate pilot plant precipitate was similarly processed with a recovery of 90 percent of the manganese. Thorough mixing and pelletizing of the charge before treatment on the sinter hearth was necessary to produce a well agglomerated product by single pass sintering. Although satisfactory sinter was produced from a variety of material combinations, best results were obtained on a charge that contained 80 percent flotation concentrate and 20 percent return sinter fines. This combination was mixed with 6 percent coke, based on weight of concentrate; and 12 percent moisture. Sintering such a charge yielded a well agglomerated product containing over 80 percent coarse material, The results of standard crushing tests showed that the product was physically comparable to iron ore sinters and manganese nodules. A ferrograde sinter of acceptable strength was made by a single-pass processing of a blend of the flotation concentrate and the leach plant precipitate. Sintering the precipitate alone proved difficult because of its relatively high manganese content and physical nature. However, a satisfactory single-pass sinter was made by increasing the proportion of return sinter fines in the charge to 40 percent and the moisture content to 22 percent.

Sintering and Smelting Manganese Concentrates from Maggie Canyon Ore, Artillery Mountains Area, Ariz

R. S. Lang

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