Surface arrangements at reduction works : ; Ore dressing and milling ; Fine grinding ; Sampling ores ; Roasting and calcining ores ; Hyposulphite lixiviation ; The chlorination process.

Includes index.

Krom's ore crushing and concentrating machines /

"Index": p. 2 of cover.

Geologia e Caracterização Tecnológica do Minério de Manganês da Mina Córrego do Cocho, Itapira (SP)

The objects of this study are three manganese ore deposits and one mine derived from lateritic weathering of gondites (spessartine quartzites). These deposits are associated with Mn-rich garnet metasediments of the Itapira Group (Paleoproterozoic) and the reserves were estimated at approximately 2.0 × 10 6 tons with an average grade of 23% MnO 2. The ore minerals are cryptomelane, pyrolusite, lithiophorite, spessartine and psilomelane. Several crystal shapes and textural characteristics were identifi ed in this study, which are related to the degree of liberation, as confi rmed by heavy media separation method. In this study, we determined the main characteristics of the liberation of manganese, which is concentrated in the fi ne grain-size fraction and is lost during ore dressing. Therefore, the low average content of MnO 2 (28%) is due to this loss, whereas at grain size of minus 0.074 mm, contents near 40% MnO 2 were observed. This suggests that the ore can be used for manufacturing manganese sulphate fertilizers. A comparative study with the ore deposits located at Ouro Fino (MG), mainly with the Caneleiras mine, showed that higher degree of liberation occurs in the coarse grain-size fractions (0.84 to 0.074 mm with MnO 2 content of 38%). As a consequence, the ore can be used for manufacturing Fe-Si-Mn alloys.

The Staining Effect of the Hydrochloric Acid-Chromate Trioxide Solution on the Minerals of the Chalcocite-Stibnite-Galena Ternary System.

The object of this work has been to devise a method by which the different phases in the chalcocite-stibnite-galena ternary system may be identified. As the mineralogists have no precise methods for the identification of these phases, a hydrochloric acid-chromate trioxide staining solution was employed.

The Acropolitan - v. 1, no. 2

In this issue...Ore Dressing, John Quinn, Butte, Montana, copper, Mt. View mine, Anaconda Copper Mining Company

The Acropolitan - v. 8, no. 1

In this issue...A. M. Gaudin, swim marathon, Creamery Café, Anaconda, Montana, Ore Dressing, copper, Argentina maps, Dr. C. W. Clapp, Glacier Park, Dancing Club

Uranium production process designs for leached zone plants.

"This volume is the seventh in a series of reports dealing with the processing of the leached zone portion of the Florida phosphate producing area for the recovery of uranium and associated products."

Physical beneficiation of low-grade uranium ores,

"July 30, 1958."

Transactions of the Institution of Mining and Metallurgy.

Section titles vary slightly.

The Elements of mining engineering [microform] /

Includes indexes.

The Mining world index of current literature

Subtitle varies slightly

A Mineral Dressing Study of the U.S. Grant Ore

This investigation concerns the development of a satis­factory method or extracting or concentrating gold and silver from the ores of the U. S. Grant Mine. The choice between applying an extractive process and one by which the valuable mineral constituents are concentrated depends on more than one factor.

A Mineral Dressing and Economic Study of a Complex Arsenical Ore

The factors that influence the choice of a method for treat­ment of an ore comprise the technical and economic limitations and advantages, derived in detail and balanced according to the exigencies of the particular situation.

A Mineral Dressing Study of the Benefication of Philipsburg Manganese Carbonate Ore

The beneficiation of rhodochrosite ore to the extent that it is suitable for nodulizing and subsequent use in the steel industry is intriguing. Such ores from certain mines is relatively easy to beneficiate, but the rhodo-chrosite ore from several deposits of the Philipsburg district has never been successfully up-graded by any of the several known beneficiating methods.