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Coal-Washing Investigations: Methods and Tests

Description: From Introduction: "The investigations described in this bulletin are confined to a study of the washing characteristics of bituminous coals. The washing characteristics of coals from many of the most important coal-producing fields of the Eastern and Central States were examined."
Date: 1929
Creator: Yancey, H. F. & Fraser, Thomas
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Potash Salts from Texas-New Mexico Polyhalite Deposits: Commercial Possibilities, Proposed Technology, and Pertinent Salt-Solution Equilibria

Description: From Introduction: "Figure 1 shows the location of sources that have been either exploited or seriously considered at one time or another, super-imposed upon a map indicating by small letters the order of consumption of K2O in the leading States; the amount used in these States, together with the percentage of the total consumption of potash used as fertilizer in the United States in 1939, is given in table 1. Figure 2 shows the domestic production and total consumption of potassium salts, in t… more
Date: 1944
Creator: Conley, John E. & Partridge, Everett P.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Coal Deposits in the Deep River Field, Chatham, Lee, and Moore Counties, N.C.

Description: From Introduction: "An investigation by diamond drilling was undertaken by the Bureau of Mines at the instance of officials of the State of North Carolina to determine the thickness and continuity of the coal beds, physical conditions in and surrounding the beds that would influence mining, and the petrographic and chemical characteristics of the coals."
Date: 1952
Creator: Toenges, Albert L.; Turnbull, Louis A.; Shields, Joseph J.; Haley, Wilbur A.; Parks, B. C.; Abernethy, Roy F. et al.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Mica Beneficiation

Description: From Abstract: "The micaceous schist ores yielded concentrates containing 95 to 98 percent mica, with recoveries ranging from 70 to 83 percent. Part 1 of this report summarizes the process development work and demonstrates the feasibility of producing commercial-grade mica concentrates. The report also includes details of commercial beneficiation and grinding of mica. Also included in part 2 of this report are details of commercial mica production, including methods of mining, recovering, and g… more
Date: 1973
Creator: Browning, James S.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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