Minerals Research Lab Reports

The Minerals Research Laboratory is a world leader in research, development, and implementation of mineral processing techniques. The MRL is part of the North Carolina State University College of Engineering, under the management of the NC State Industry Expansion Solutions.

Introduction

This page lists public mineral beneficiation reports prepared by the Minerals Research Laboratory (MRL). These reports and publications are organized chronologically from oldest to youngest. By listing these reports here, it is hoped these will provide a bridge from exploration to bench-scale and pilot plant beneficiation studies to assist the minerals industry. These reports also provide a wealth of information on North Carolina’s mineral resources.

Many of the public reports are available for free download directly from the web site, by clicking on the report title. We are scanning and uploading the reports as time allows, so reports that have not been uploaded yet are available only by request. Use the contact page to request any report not available on-line; they are all free of charge.

The MRL also conducts research and provides services under contractual agreements with industry and private companies. Reports pertaining to these studies are confidential and are not available to the public without written permission of the sponsor.

Keyword List

The following keywords occur in various MRL report titles; the keyword list is not exhaustive, and is provided only as a set of search suggestions. Using your browser, you can “search” or “find” reports with specific keywords in the title; for example, you can search for “mineral” or “beneficiation” or some other item. The keywords do not have hyperlinks.

• Adsorption
• Aggregate
• Amine
• Anionic
• Anthophyllite
• Asbestos
• Ball milling
• Barite
• Bench
• Beneficiation
• Bulk Density
• Calcining
• Carbon
• Cation exchange
• Chemical composition
• Chromite
• Circuit
• Clay
• Coal
• Coating
• Concentrate
• Core
• Desliming
• Detergent-type
• Dielectric
• Drying
• Dust
• Elutriation
• Feldspar
• Fillers
• Fine grinding
• Flake
• Floatation
• Flotation cell
• Fluoride
• Foundry sand
• Garnet
• Gibbsite
• Glass sand
• Gold
• Gold-thiourea
• Grinder
• Grinding
• Heavy minerals
• High intensity
• High purity quartz
• Hydraulic sizer
• Hydrosizing
• Industrial mineral
• Kaolin
• Kings Mountain
• Lease
• Loss on ignition
• Magnetic
• Mica
• Non-hydrofluoric acid
• Nonmetallic
• Nonpolar oil
• Ore
• Paint
• Particle size
• Phosphate
• Pilot plant
• Potash
• Process development
• Process
• Processing
• Pycnometer
• Pyrophyllite
• Quartz
• Reagent
• Reclaimed
• Resources
• River sand
• Sand
• Scheelite
• Schist
• Silicate
• Sillimanite
• Soapstone
• Spodumene
• Strip mine
• Sulfide
• Tailings
• Texas Gulf Sulphur
• Titanium
• TVA
• Ultrasonic conditioning
• Ultrasonic
• Wet magnetic
• Zircon

Research Reports

Note that the reports were scanned in from the best available copies, but some older reports may be difficult to read. Contact us for more information or to order a report not yet available online.

• • 176. Evaluation of the Mixture Compositions of Fly Ash, Sludge and Binder to Produce LWA by the Pyro-process and Production of a Bulk Quantity of LWA for ASTM Specification Tests, by Dr. Robert Mensah-Biney, Senior Mineral Processing Engineer, North Carolina State Minerals Research Laboratory, Asheville, North Carolina, MRL Report No. 03-05-P, 17 pages.
  • 175. The Influence of the Ore Deposit and Product Market on the Design and Operation of Industrial Mineral Processing Plants, by Dr. Bruce Tippen and John Schlanz, North Carolina State Minerals Research Laboratory, Asheville, North Carolina; MRL Report No. 03-03-P. Presented at the annual SME Meeting and Exhibit in Cincinnati, Ohio, February 24-26, 2003, 20 pages.
  • 174. Non-sulfide Flotation Technology and Plant Practice, by J. Miller, University of Utah, Salt Lake City, Utah, Dr. R. Bruce Tippin, North Carolina State Minerals Research Laboratory, Asheville, North Carolina, and R. Pruett, IMERYS, Sandersville, Georgia; MRL Report No. 02-01-P, March, 2002, 20 pages.
  • 173. Glass sand potential of the Pinehurst Formation in Richmond County, North Carolina: Processing and mineral characterization, by Leigh Ann Carpenter, Environmental Studies, University of North Carolina at Asheville, One University Heights, Asheville, North Carolina 28804-3299. Faculty advisors: Dr. Robert Mensah-Biney, North Carolina State University, Minerals Research Laboratory, Asheville, North Carolina, and Dr. J. W. Miller, Environmental Studies, University of North Carolina at Asheville; MRL Report 01-04-P. Presented at the Geological Society of America Southeastern Section Meeting, Raleigh, North Carolina, April 4-5, 2001, 14 pages.
  • 172. Silicate Mineral and Potash Flotation, by R. Bruce Tippin, Ph.D., Minerals Research Laboratory, Asheville, NC; H. L. Huiatt, Consultant, Murray, UT; David Butts, IMC Kalium, Ogden, UT; MRL Report No. 98-13-P. Presented at the SME Annual Meeting and Exhibit in Denver, Colorado, March 1-3, 1999. 13 pages.
  • 171. Adsorption of Acidic Gold-Thiourea Complex onto a Strong Cation Exchange Resin, by Robert Mensah-Biney, Ph.D., Minerals Research Laboratory, Asheville, NC, MRL Report No. 96-22-P. Presented at the SME Annual Meeting in Denver, Colorado, February 24-27, 1997. 13 pages.
  • 170. Kinetics of Gold-Bromide Loading onto Activated Carbon, by Robert Mensah-Biney, Ph.D., Minerals Research Laboratory, Asheville, NC, K. J. Reid and M. T. Hepworth, Civil Engineering Department, University of Minnesota, Minneapolis, MN. MRL Report No. 96-13-P. Presented at the SME Annual Meeting in Phoenix, Arizona, March 11-14, 1996. 9 pages.
  • 169. Recovery of a High Grade Pyrophyllite Co-Product from Baghouse Dust, by Michael J. Garska, ECC, Kathleen Snyder, Intern MRL, and Melanie Tarver, Intern, MRL. MRL Report No. 96-6-P. Presented at the SME National Convention, Phoenix, Arizona, March 10-15, 1996. 22 pages.
  • 168. The Independent Engineer’s Role in Foreign Mining Project Financing, by R. Bruce Tippin, Ph.D., Director. MRL Report No. 96-2-P. Presented at the SME National Convention, Phoenix, Arizona, March 10-15, 1996. 74 pages.
  • 167. Using a Hindered Settling Hydraulic Sizer to Produce a Clay Product from a Mica Plant Waste Stream, by James T. Tanner, Jr., Michael J. Garska, and Louis Schlesinger, MRL Staff Engineers and James E. Barton of KMG Minerals, Inc., MRL Report No. 94-6-P. 9 pages. Presented at the SME National Meeting, Albuquerque, New Mexico, February 13,-18, 1994.
  • 166. Magnetic Beneficiation of a Southeastern Quartz Sand, by Jan Jirestig, Visiting Scientist, Div. of Mineral Processing, Luleä University of Technology, Sweden, and James T. Tanner, Jr., Interim Director, Minerals Research Laboratory, MRL Report No. 93-25-P. 25 pages.
  • 165. High Throughput, High Solids Flotation of 20 X 200 Mesh North Carolina Phosphate in a Short Column Cell, by Joel Hutwelker, Louis Schlesinger, Mike Garska, and James T. Tanner, Jr., MRL Staff Engineers, MRL Report No. 93-5-P. 24 pages. Presented at the SME national meeting, Reno, Nevada, February 15-18, 1993. (Preprint No. 93-289).
  • 164. Preliminary Desliming Tests with North Carolina Phosphate Using a Pilot-Scale Linatex Hydrosizer, by Louis Schlesinger and Joel F. Hutwelker, MRL Report No. 92-24-P. 33 pages.
  • 163. A Comparison of the Particle Size Distribution of a Kaolin Processed on a Bradley Mill versus the Same Kaolin Processed on a Raymond Mill, James. T. Tanner, Jr., MRL Report No. 91-18-P. 6 pages.
  • 162. Effect of Ultrasonic Conditioning of the Froth Flotation of Pittsburgh No. 8 Coal, Louis Schlesinger and Richard B. Muter, MRL Report No. 89-24-P. 19 pages. Presented at the Pittsburgh Coal Conference, Pittsburgh, PA, and at Coal Prep ’90, Cincinnati, OH, May, 1990.
  • 161. Batch Testing to Produce a Shippable Concentrate from the Conrad Hill Stamp Mill Tailings, Louis Schlesinger, MRL Report No. 89-21-P. 51 pages.
  • 160. Flotation of Andalusite with Oleic Acid and Petroleum Sulfonate, Eung Ha Cho, Visiting Professor, MRL Report No. 89-13-P. 11 pages.
  • 159. Determination of Olivine Loss on Ignition, Albert A. Wilds, Jr., MRL. Report No. 88-21-P. 7 pages. Presented at the Carolinas Section of AIME Meeting in Little Switzerland, NC, 1988.
  • 158. Batch Testing to Produce a Bulk Sulphide Concentrate from Ore Dumps of the Old Silver Hill Mine, John W. Schlanz, MRL Report No. 88-14-P. 17 pages.
  • 157. Laboratory Production of High Purity Quartz from Spruce Pine Mica/Clay Tailings and Other Spruce Pine Area Samples, Kevin L. Purdy, MRL Report No. 88-12-P.15 pages.
  • 156. Grinding: An Overview of Operation and Design, John W. Schlanz, MRL Report No. 87-31-P. 46 pages. Presented at the AIME Fine Grinding Conference in Asheville, NC 1989.
  • 155. Applied Nonmetallic Mineral Processing Research at the NCSU Minerals Research Laboratory in Asheville, NC, USA, with Examples of Process Development for Feldspar, Mica, Quartz, Spodumene, Phosphate and Glass Sand, Immo H. Redeker, MRL Report No. 87-14-P. 17 pages. Presented at the Leoben Mining Conference, Leoben, Austria, 1987.
  • 154. Plant and Laboratory Practice in Nonmetallic Mineral Flotation, Immo H. Redeker and Edwin H. Bentzen, III. MRL Report No. 87-2-P. 20 pages. Presented at the SME Annual Meeting, Denver, Colorado, March 1987.
  • 153. The Role of Nonpolar Oils as Flotation Reagents, Robert A. Seitz, MRL Report No. 86-28-P. 11 pages. Presented at the SME Annual Meeting, Denver, Colorado, March 1987.
  • 152. The Role of Frothers in Coal Flotation, R. A. Seitz and S. K. Kawatra MRL Report No. 86-18-P. 11 pages. Presented at the SME Annual Meeting, Denver, Colorado, March 1987.
  • 151. North Carolina Phosphate, Immo H. Redeker, Chapter 21 in the new SME Mineral Processing Handbook, 1985. MRL Report No. 86-13-P. 12 pages.
  • 150. Manufacture of Reconstituted Talc Crayons for Marking Steel, James T. Tanner, Jr., SME Annual Meeting, New Orleans, March 1986, Preprint No. 85-77. MRL Report No. 86-12-P. 7 pages.
  • 149. Sizing with a Lewis Hydrosizer in Closed Circuit Grinding and Batch Flotation, Robert M. Lewis, MRL Report No. 85-31-P. 36 pages.
  • 148. The “Hydroplane” Wet Mica Grinding Principle: Initial Tests with a Full-Sized Disc Mill, J. Philip Neal, MRL Report No. 85-28-P. 38 pages.
  • 147. Pilot Plant Operation of Non-HF Feldspar Flotation with a Split Conditioner Circuit, J. Philip Neal, MRL Report No. 84-20-P. 30 pages.
  • 146. 1983 Annual Survey of the Mica Industry, J. T. Tanner, Jr., MRL Report No. 84-4-P. 6 pages.
  • 145. 1982 Annual Survey of the Mica Industry, J. T. Tanner, Jr., MRL Report No. 83-29-P. 5 pages.
  • 144. Resources to Reserves by Phosphate Processing, Immo H. Redeker, MRL Report No. 83-25-P. 22 pages.
  • 143. Cleaning and Sizing River Sands for Use as Fine Aggregate in Concrete and Masonry Mortar, J. T. Tanner, Jr., MRL Report No. 83-24-P. 14 pages.
  • 142. NORTH CAROLINA – Mineral Producer for the Ceramic Industry. J. Philip Neal, MRL Report No. 83-15-P. 16 pages.
  • 141. Hydrosizing of Industrial Minerals, R. M. Lewis, MRL Report No. 82-19-P. 20 pages.
  • 140. Copy of Article from Mining Congress Journal “The Lewis Hydrosizer – Simple Solution to a Common Problem.” 82-7-P. 6 pages.
  • 139. Comparison of Denver Sub-A Flotation Cell and Flotation Cell for Pilot Plant Processing of Mica Ore. Robert M. Lewis. MRL Report No. 82-2-P. 30 pages.
  • 138. The Lewis Hydrosizer, Robert Moore Lewis, MRL Report No. 81-12-P. 25 pages.
  • 137. Confirmatory Tests on Feldspar Flotation without F ion, J. Philip Neal, MRL Report No. 81-11-P. 33 pages.
  • 136. Flotation of Feldspar, Spodumene, Quartz and Mica from Pegmatites in North Carolina, U. S. A., Immo H. Redeker, MRL Report No. 81-1-P. 14 pages.
  • 135. Recovery of Feldspar and Quartz from Spruce Pine Filter Cake Waste, John G. Groppo. MRL Report No. 80-23-P. 12 pages.
  • 134. Electrostatic Separation of North Carolina Phosphates, John G. Groppo. MRL Report No. 80-22-P. 10 pages.
  • 133. Correlation of Parameters for Laboratory Hydrocyclone Operation, John G. Groppo. MRL Report No. 80-15-P. 11 pages.
  • 132. Simplified Hydraulic Mineral Sizing Unit, Robert M. Lewis. MRL Report No. 80-10-P. 11 pages.
  • 131. Processing Glass Grade Sand from Dune Sand, C. Justus Brown, L-O-F, and Immo H. Redeker, MRL. MRL Report No. 80-5-P. 25 pages.
  • 130. Biotite-Muscovite Separation from Mica Schist in Batch and Pilot Plant, Robert M. Lewis. MRL Report No. 79-22-P. 55 pages.
  • 129. Beneficiation of Olivine for Mayland Mining Corporation, W. T. McDaniel. MRL Report No. 79-17-P. 6 pages.
  • 128. Ceramics for Energy Storage Units: Bricks from North Carolina Olivine for Head Storage Furnaces, H. Palmour, III, B. M. Gay, ERSD, North Carolina State University, and Immo H. Redeker, Minerals Research Laboratory, MRL Report No. 79-16-P. 20 pages.
  • 127. Flotation Properties of Feldspar and Quartz, K. L. Sandvik, MRL Report No. 79-10-P. 35 pages.
  • 126. Evaluation of Acids as a Filter Aid in Mica Processing by Zeta Potential Measurements, K. L. Sandvik, MRL Report No. 79-6-P. 14 pages.
  • 125. Activation and Evaluation of the Riddick Zeta-Meter, K. L. Sandvik. MRL Report No. 79-3-P. 13 pages.
  • 124. Upgrading of Taconite Concentrate to Direct Reduction Specifications by Flotation, K. L. Sandvik and B. A. Dybdahl. MRL Report No. 79-1-P. 17 pages.
  • 123. Harris Mining Company’s Coarse Mica Flotation Pilot Plant, Robert M. Lewis. MRL Report No. 78-20-P. 105 pages.
  • 122. “Phosphate Mining in North Carolina,” Immo H. Redeker, Minerals Research Laboratory, and Thomas J. Wright, Texasgulf, Inc. MRL Report No. 78-14-P. Presented by Immo H. Redeker at joint meeting of German Association of Metallurgists and Miners GDMB and Mining Association of Austria BV0, Innsbrook, Austria, May 17-20, 1978, published in Erzmetall, February 1979. 40 pages.
  • 121. Effect of Process Variables in Feldspar Flotation Using Non-Hydrofluoric Acid System, S. G. Malghan. MRL Report No. 78-3-P. AIME Preprint No. 78-B-105. Presented at SME/AIME Annual Meeting in Denver, Colorado, February 18, 1978. 23 pages.
  • 120. Possible Recovery of Heavy Minerals from Phosphate Tailings, Robert M. Lewis, MRL Report No. 78-2-P. AIME Preprint No. 78-B-300. Presented at Carolinas Section of AIME Winter Meeting in Gastonia, North Carolina, February 10, 1978, and AIME Fall Meeting in Orlando, Florida, September 12, 1978. 12 pages.
  • 119. “Concentration of Spodumene from North Carolina Pegmatite Ores,” Immo H. Redeker. MRL Report No. 77-11-P. AIME Preprint No. 77-H-382. Presented at SME/AIME Fall Meeting and Exhibit in St. Louis, Missouri, October 19-21, 1977. Published in Mining Engineering, April 1979. 14 pages.
  • 118. Pilot Plant Testing of Non-Hydrofluoric Acid Reagent System to Float Feldspar, S. G. Malghan. MRL Report No. 77-5-P. 40 pages.
  • 117. Flotation of Different Feldspar Ores on Bench Scale Comparing HF and non-HF System, S. G. Malghan. MRL Report No. 77-4-P. 23 pages.
  • 116. “Flotation of Feldspar, Spodumene, Quartz, and Mica from Pegmatites in North Carolina, USA,” Immo H. Redeker. MRL Report No. 77-3-P, published inErzmetall, December, 1977. Presented at 100 Years of Froth Flotation Meeting in Bad Harzburg, West Germany, March 24, 1977. 8 pages.
  • 115. Flotation Separation of Feldspar-Quartz, by S. G. Malghan, Mineral Engineer, Report No. 76-8-P. 6 pages.
  • 114. Ball Mill Grinding and Iron Minerals Flotation, Immo H. Redeker and S. G. Malghan. MRL Report No. 76-10-P. 70 pages.
  • 113. “Selective Flotation Separation of Feldspar in Non-Fluoride Medium,” MRL Report 76-9-P, Subhas G. Malghan. AIME Preprint No. 76-H-331. Presented at SME/AIME Fall Meeting, Denver, September 1, 1976. 21 pages.
  • 112. “Beneficiation and Conservation of North Carolina Phosphates,” MRL Report 76-5-P, Immo H. Redeker. Presented at Centennial Meeting of American Chemical Society, New York, April 7, 1976. 25 pages.
  • 111. Evaluation of a Wet Disc Mill Siphon for Production of Fine Ground Mica. J. Philip Neal, 76-3-P. 43 pages.
  • 110. “Pilot Plant Evaluation of an Anionic Detergent-Type Reagent for Beneficiation of a Glass Sand,” Robert M. Lewis. TP74H217, Transactions of SME/AIME, Vol. 260, July 1976, 75-22-P. 16 pages.
  • 109. Laboratory Notes on Potential Western North Carolina Soapstone Resources, E. H. Bentzen III. Laboratory Notes No. 1, July 1975. 105 pages.
  • 108. Mineral Separation Tests on the Syntron Dielectric Separator, J. Philip Neal, Ore Dressing Specialist. Report No. 75-8-P. 14 pages.
  • 107. “Feldspar and Aplite,” C. P. Rogers, Jr., The Feldspar Corporation, and J. Philip Neal, Minerals Research Laboratory. Chapter in 4th edition of Industrial Minerals and Rocks, AIME, 1975. 8 pages.
  • 106. “FMC Corporation’s North Carolina Phosphate Research Project,” Robert M. Lewis. TP74H210, Transactions of SME/AIME, Vol. 256, December 1974. 6 pages.
  • 105. “Pilot Plant Processing of Silica Ore Comparing Various Reagents and Techniques,” Robert M. Lewis, MRL Report No. 74-14-P, 27 pages.
  • 104. “Batch Testing of Silica Ore Using A New Flotation Technique and Conventional Flotation Procedures,” Robert M. Lewis, MRL Report No. 74-13-P. 20 pages.
  • 103. “Heavy Minerals Concentration and Glass-Grade Silica Production by Froth Flotation,” Robert M. Lewis, MRL Report No. 74-8-P. 9 pages.
  • 102. “Improved Mineral Recovery through Attrition Grinding,” E. H. Bentzen, MRL Report No. 74-4-P. 14 pages.
  • 101. Recovery of Heavy Minerals from North Carolina Phosphate Tailings, Robert M. Lewis. Report No. MRL-4, February 1974. 10 pages.
  • 100. “U. S. Bureau of Mines Attrition Type Grinder,”
  • 99. “Preliminary Beneficiation and Evaluation of Jordanian Feldspar Ore,” J. Philip Neal, MRL Report No. 73-13-P. 30 pages.
  • 98. Evaluation of Potential North Carolina Feldspar Resources, Final Report. J. Philip Neal, Minerals Research Laboratory; Leonard S. Wiener, P. Albert Carpenter and William F. Wilson, Report No. MRL-3, May 1973. 67 pages.
  • 97. “The Feldspar Story in our Leading Feldspar State: Evaluations and Comparisons,” J. Philip Neal. AIME Preprint No. 73-H-19. Presented at AIME Annual Meeting, Chicago, February 1973. 33 pages.
  • 96. “Talc or Soapstone?” E. H. Bentzen III. AIME Preprint No. 73-H-8. Presented at AIME Annual Meeting, Chicago, February 1973. 17 pages.
  • 95. Flotation of Fine Ball Mill Ground Spodumene from North Carolina Ores, Immo H. Redeker. Report No. 72-24-P. 38 pages.
  • 94. “Research Approach to Flotation of Strip Mine and Deep Mine Coals,” Robert M. Lewis. Transactions of SME/AIME, Vol. 252, June 1972.  Presented at Charlotte Meeting of Carolinas Section of AIME, October 1972. 8 pages.
  • 93. Beneficiation of Olivine for Foundry Sand by Calcining, Immo H. Redeker. Report No. MRL-2, August 1972. 17 pages.
  • 92. “Soapstone in North Carolina,” Edward H. Bentzen, MRL Report No. 72-15-P, 28 pages.
  • 91. “Qualitative Analysis of N. C. Mineral Industry’s Tailings,” Edward H. Bentzen, MRL Report No. 72-12-P, 6 pages.
  • 90. “Beneficiation of Phosphate Ores Containing Siliceous and Calcium Carbonate Gangue – Final Report,” Robert D. Kauffman, MRL Report No. 72-8-P. 19 pages.
  • 89. “Scheelite Discovered in Certain Soapstone Deposits in the Blue Ridge of Madison County, North Carolina,” E. H. Bentzen III, Minerals Research Laboratory; and Leonard S. Wiener, N. C. Division of Mineral Resources. Presented at Tuscaloosa meeting of SE Section of the Geological Society of America. Scientific Communication in Economic Geology, Vol. 68, No 5, August 1973. MRL Report No. 72-7-P. 6 pages.
  • 88. “Rapid Quantitative Analysis of Mineral Samples by Use of an Air Pycnometer,” Robert M. Lewis. Scientific Communication in Economic Geology, Vol. 67, No. 2, March-April 1972. 4 pages.
  • 87. “Zircon Survey – Report No. 2,” E. H. Bentzen, MRL Report No. 72-1-P. 7 pages.
  • 86. Beneficiation and Geologic Evaluation of North Carolina Mica Schist, Robert M. Lewis, Minerals Research Laboratory; and Jerry L. Bundy and Leonard S. Wiener, N. C. Division of Mineral Resources. Engineering School Bulletin No. 86, December 1971. 52 pages.
  • 85. “Sizing of Sub-Sieve Mica by Elutriation,” Robert M. Lewis, MRL Report No. 71-32-P. 6 pages.
  • 84. “Ball Milling and Flotation of Spruce Pine Feldspar Ore,” Immo H. Redeker, MRL Report No. 71-31-P. 6 pages.
  • 83. “A Useful Method for the Determination of Major Mineral Components in Spruce Pine Feldspar Ore and Determination of Recoverable Feldspar,” Immo H. Redeker, MRL Report No. 71-30-P. 6 pages.
  • 82. “Recovery of Heavy Minerals from North Carolina Phosphate Matrix,” Robert M. Lewis, MRL Report No. 71-23-P. 12 pages.
  • 81. “Wet Attrition-Grinding of Mica: Continuation of Research toward Optimum Techniques and a Production Prototype,” J. Philip Neal, MRL Report No. 71-16-P. 45 pages.
  • 80. “Electron Microscope Photographic Study of Mica Products,” Robert M. Lewis, MRL Report No. 71-14-P, 3 pages.
  • 79. “Soapstone in Madison County,” E. H. Bentzen, MRL Report No. 71-13-P, 18 pages.
  • 78. “Titanium Resources – Report 2,” Robert M. Lewis, MRL Report No. 71-11-P, 47 pages.
  • 77. “Calcining of Olivine Foundry Sand in Fluosolid and Tube-Type Furnaces,”Immo H. Redeker, MRL Report No. 71-7-P. 18 pages.
  • 76. “North Carolina Phosphate Concentration: Texas Gulf Sulphur Co. Project,”MRL Report 71-6-P, Immo H. Redeker. Presented at AIME Annual Meeting, New York, March 4, 1971, AIME Preprint No. 71-H-23. Published inTransactions of SME/AIME, Vol. 250, No. 1, March 1971. 10 pages.
  • 75. “Mica Concentration by Rising Current Elutriation and Screening,” MRL Report 70-33-P, Robert M. Lewis. Presented at Asheville meeting of Wet Ground Mica Association, May 11, 1971. 10 pages.
  • 74. “Upgrading of Gafsa Phosphate by Calcining,” Immo H. Redeker, MRL Report No. 70-31-P. 3 pages.
  • 73. “Platinum Group Content of Some Western North Carolina Chromites,” E. H. Bentzen, MRL Report No. 70-29-P. 5 pages.
  • 72. “Titanium Resources,” Robert M. Lewis, MRL Report No. 70-27-P. 12 pages.
  • 71. “Production of Chromite Test Sample,” E. H. Bentzen, MRL Report No. 70-26-P. 7 pages.
  • 70. “Examination of Gibbsite Samples for Division of Mineral Resources,” E. H. Bentzen, MRL Report No. 70-18-P. 7 pages.
  • 69. “Chemical Composition of Some North Carolina Chromite,” MRL Report 70-14-P,  E. H. Bentzen III. Economic Geology, Vol. 65, November 1970. 3 pages.
  • 68. “How to Make Money on Minerals Reclaimed from Tailings,” Immo H. Redeker. Mining Engineering, July 1970. 2 pages.
  • 67. Comparison of Olivine Beneficiation Techniques, Robert M. Lewis. Report No. 70-8-P. 15 pages.
  • 66. “North Carolina Feldspar Tailings Utilization,” Robert F. Stoops and Immo H. Redeker. Proceedings of the Second Mineral Waste Utilization Symposium, IIT Research Institute, March 1970. 8 pages.
  • 65. “North Carolina Feldspar Flotation and Solutions to Waste Disposal Problems,” Immo H. Redeker, MRL Report No. 70-2-P, Presented at AIME Annual Meeting, Denver, Colorado, AIME Preprint No. 70-H-83, February, 1970. 19 pages.
  • 64. “North Carolina Feldspar Tailings and Solutions to Waste Disposal Problems,”Immo H. Redeker, MRL Report No. 70-1-P. 5 pages.
  • 63. Feldspar Tailings Utilization – Final Report, School of Engineering, N. C. State University, September 1969. 69 pages.
  • 62. “Preliminary Comparison of Products from Four Mica-Grinding Techniques,”J. Philip Neal, MRL Report No. 69-42-P. 14 pages.
  • 61. “Some Facts Regarding Present Foam Latex Technology as Related to Mineral Fillers,” J. Philip Neal, MRL Report No. 69-41-P. 6 pages.
  • 60. “Examination of Clay Samples Supplied by Division of Mineral Resources,” E. H. Bentzen, MRL Report No. 69-39-P. 20 pages.
  • 59. “Some Aspects of Chromite with Regard to Possible Uses of North Carolina Material,” E. H. Bentzen III. Presented at Greensboro meeting of Carolinas Section of AIME, February 1970. MRL Report 69-38-P. 17 pages.
  • 58. “Examination of Beryl Production Possibilities,” Edwin H. Bentzen III, MRL Report No. 69-37-P. 4 pages.
  • 57. “Zircon Survey,” Edwin H. Bentzen III and J.M. Lawrence, MRL Report No. 69-36-P. 6 pages.
  • 56. “Determination of Quantity of Heavy Minerals in Sands from Caswell County,”Robert D. Kauffman, MRL Report No. 69-28-P. 5 pages.
  • 55. “Possible Production of Calcium Silicate Building Products from Feldspar Plant Tailings,” Immo H. Redeker, MRL Report No. 69-26-P. 12 pages.
  • 54. “Development of Non-Fluoride ion Systems for Feldspar Flotation,” Hal E. Guess, MRL Report No. 69-25-P. 14 pages.
  • 53. “New Sources of Feldspar in North Carolina,” MRL Report 69-24-P, J. Philip Neal. Presented at Linville Falls meeting of Carolinas Section of AIME, August 1969. 16 pages.
  • 52. “Mica Schist Evaluation by Procedure Used for Clarksville Schist,” Robert M. Lewis, MRL Report No. 69-21-P. 4 pages.
  • 51. “Feldspar Grindabilities,” Immo H. Redeker, MRL Report No. 69-18-P. 8 pages.
  • 50. “Drying and Fine Grinding of Feldspar Tailings,” E. H. Bentzen, MRL Report No. 69-17-P. 8 pages.
  • 49. “Continued Evaluation of N.C. Feldspar Ores,” J. Philip Neal, MRL Report No. 69-16-P. 18 pages.
  • 48. “Pycnometer Report,” Robert M. Lewis, MRL Report No. 69-14-P. 7 pages.
  • 47. “High Quality Wet Ground Mica from Mica Schist Ores,” MRL Report 69-8-P, Robert M. Lewis. Presented at Fall Meeting of Society of Mining Engineers, Salt Lake City, Utah, September 1969, AIME Preprint No. 69-H-300. Condensed version published as Technical Note in Transactions of SME/AIME, Vol. 250, No. 1, March 1971. 8 pages.
  • 46. “Tests on High Intensity Wet Magnetic Separator,” J. Philip Neal, MRL Report No. 69-7-P. 16 pages.
  • 45. “Selective Grinding of Feldspar-Mica Oversize,” Robert D. Kauffman, MRL Report No. 69-5-P. 6 pages.
  • 44. “Beneficiation of Feldspar Filter Cake Tailings,” J. Philip Neal, MRL Report No. 69-4-P. 15 pages.
  • 43. Evaluation of Feldspar Tailings by Flotation, Edwin H. Bentzen III. 69-3-P. 11 pages.
  • 42. “Recovery of By-Products from Feldspar Plant Tailings,” Immo H. Redeker, MRL Report No. 69-2-P. 19 pages.
  • 41. “Conservation of Nonmetallic Minerals through Improved Processing,” MRL Report 69-1-P, Immo H. Redeker. Presented at AIME Annual Meeting, Washington, D. C. February 1969. 11 pages.
  • 40. “Feldspar Tailing Evaluation,” December 1968 Progress Report, Robert D. Kauffman. 42 pages.
  • 39. “Continuation of Research on Milling, Scrubbing and Sulfonate Flotation of Olivine,” MRL Report No. 68-27-P, J. Philip Neal. 21 pages.
  • 38. “Beneficiating of Frank Olivine,” Robert M. Lewis, MRL Report No. 68-26-P. 32 pages.
  • 37. “Continued Evaluation of N. C. Feldspar Ores,” J. Philip Neal, MRL Report No. 68-22-P. 5 pages.
  • 36. Feldspar Tailing Evaluation, Robert D. Kauffman, 68-21-P. 39 pages.
  • 35. “Filler Evaluation,” E. H. Bentzen, MRL Report No. 68-18-P. 5 pages.
  • 34. “Heavy Minerals from TGS Amine Tailings,” Robert M. Lewis, MRL Report No. 68-15-P. 6 pages.
  • 33. “Preliminary Feldspar Tailings Evaluation – Report No. 1,” Immo H. Redeker, MRL Report No. 68-12-P. 6 pages.
  • 32. Scrubbing and Sulfonate Flotation of Frank and Holcombe Beanet Olivine, J. Philip Neal. MRL Report No. 68-4-P. 16 pages.
  • 31. “Workshop on Utilization of Minerals in the Paint and Coatings Industries,”Philip N. Sales, MRL Report No. 67-32-P. 1 page.
  • 30. “Evaluation of North Carolina Feldspar Ores,” J. Philip Neal, MRL Report No. 67-24-P. 9 pages.
  • 29. “Flotation Work on Core Composites from State Lease E in the Pamlico River,” Immo H. Redeker, MRL Report No. 67-19-P. 5 pages.
  • 28. “Mica Schist Program,” Robert M. Lewis, MRL Report No. 67-18-P. 14 pages.
  • 27. “Contamination of Quartz When Grinding in Laboratory Pebble Mill,” Philip N. Sales, MRL Report No. 67-11-P. 2 pages.
  • 26. “Effect on Flotation of Aging Ferrofiltered and Non-ferrofiltered Feldspar Ore,” Kenneth J. Munn, MRL Report No. 67-5-P. 7 pages.
  • 25. “Flotation of Weathered Silicates,” Dean Van Dyk, Foote Mineral Co., (formerly with Minerals Research Laboratory). Presented at Gastonia meeting of Carolinas Section of AIME, May 1967. 15 pages.
  • 24. “Workshop on the Availability and Utilization of N. C. Mineral Resources,”Philip N. Sales, MRL Report No. 66-33-P. 2 pages.
  • 23. “Concentration of South Carolina Sillimanite,” MRL Report No. 66-31-P, Immo H. Redeker. Geologic Notes, South Carolina Division of Geology, April 1967. 2 pages.
  • 22. “Free-fall Electrostatic Separation of Phosphate and Calcite Particles,” D. Grant Feasby, MRL Report No. 66-30-P. 5 pages.
  • 21. “Investigation of Hallimond-Tube Flotation of Low Grade Phosphate Material,”D. Grant Feasby, MRL Report No. 66-29-P. 5 pages.
  • 20. “Survey of Factors Contributing to Variable Mica Bulk Density Readings,”MRL Report 66-27-P, J. Philip Neal, December 1966. 8 pages.
  • 19. “Minimum Reagent Levels in Feldspar Flotation,” Philip N. Sales. MRL Report No. 66-19-P. 5 pages.
  • 18. “Electrostatic Beneficiation of Phosphate Materials,” D. Grant Feasby, MRL Report No. 66-17-P. 8 pages.
  • 17. “Mica Leaching,” Robert M. Lewis, MRL Report No. 66-16-P. 6 pages.
  • 16. “Mica Schist Program,” Robert M. Lewis, MRL Report No. 66-15-P. 11 pages.
  • 15. “The Kings Mountain Mica Story,” P. N. Sales. Presented at Gatlinburg meeting of Southeastern Section American Ceramic Society, July 1, 1966. Included in Minerals Research Laboratory Bulletin, Vol. 8, No. 2, July 1966. 3 pages.
  • 14. “Potential for Sand-Lime Brick in North Carolina,” Immo H. Redeker. Presented at Gatlinburg meeting of Southeastern Section American Ceramic Society, July 1, 1966. Included in Minerals Research Laboratory Bulletin, Vol. 8, No. 2, July 1966. 7 pages.
  • 13. North Carolina Phosphates and the Texas Gulf Sulphur Company Project at the Asheville Minerals Research Laboratory, Immo H. Redeker. Engineering School Bulletin No. 83, N. C. State University, April 1966. 24 pages.
  • 12. “Sand and Aggregate from Weathered Rock,” Robert M. Lewis, MRL Report No. 66-9-P. 6 pages.
  • 11. “Garnet,” A. F. Alsobrook, MRL Report No. 66-1-P, April, 1966. 4 pages.
  • 10. Anthophyllite Asbestos in North Carolina, Stephen G. Conrad, William F. Wilson and Eldon P. Allen, N. C. Division of Mineral Resources; and Thomas J. Wright, Minerals Research Laboratory. Division of Mineral Resources Bulletin 77, N. C. Department of Conservation and Development, 1963. 61 pages.
  • 9. “Olivine Uses and Beneficiation Methods,” W. Gay Wells. Included in Minerals Research Laboratory Bulletin, Vol. 1, No. 2, August 1959. 9 pages.
  • 8. “Phosphate Bonded Mica Makes New Electrical Insulation,” Larry J. Carter, P. N. Sales and W. T. McDaniel. Presented at Gatlinburg meeting of Southeastern Section American Ceramic Society, June 16, 1959. Included inMinerals Research Laboratory Bulletin, Vol. 1, No. 1, June 1959. 5 pages.
  • 7. Beneficiation of Olivine by Means of a Humphreys Spiral, M. K. Banks and W. Gay Wells, Engineering School Industrial Information Series No. 10, N. C. State College, April 1955. 19 pages.
  • 6. “A Method for Concentration of North Carolina Spodumene Ores,” M. K. Banks, W. T. McDaniel and P. N. Sales. TP3488H, AIME Transactions, Vol. 196. Mining Engineering, February 1953. 6 pages.
  • 5. “New Methods for Recovery of Flake Mica,” R. B. Adair, W. T. McDaniel, and W. R. Hudspeth. TP3023B, AIME Transactions. Mining Engineering, March 1951. 4 pages.
  • 4. Geology and Preliminary Ore Dressing Studies of the Carolina Barite Belt, E. C. Van Horn, J. R. LeGrand, and L. L. McMurray. Division of Mineral Resources Bulletin No. 57, N. C. Department of Conservation and Development, 1949. 26 pages.
  • 3. Beneficiation of Stained Talc, W. R. Hudspeth, R. B. Adair and P. N. Sales. MRL Report of Investigation No. 2, 1949. 5 pages.
  • 2. A New Method for Recovery of Flake Mica from Washing Plant Tailings, R. B. Adair, W. T. McDaniel and W. R. Hudspeth. MRL Report of Investigation No. 1, October, 1949. 7 pages.
  • 1. Hartwell Mica District, Kefton H. Teague, TVA; and J. R. LeGrand, Minerals Research Laboratory. Released by Georgia Dept. of Mines, Mining and Geology, 1947. 23 pages.
  • E. H. Bentzen, MRL Report No. 73-22-P. 15 pages.

General and Miscellaneous Publications

Because some of these reports refer to collections of documents, many will not be made available on-line. To order a publication, use the form on the contact page.

• 12. Oral History of North Carolina Mining, in review.
• 11. “High-Silica Resource Potential of the Upper Chilhowee Quartzite, McDowell County, North Carolina” by Leonard S. Wiener, Carl E. Merchat, and James T. Tanner, Jr., Information Circular No. 26, North Carolina Geological Survey, 1990. 22 pages. Available from the North Carolina Geological Survey.
• 10. “The North Carolina State Minerals Research Laboratory and Minerals Wastes in North Carolina,” by Laboratory Staff, May 1968. 10 pages.
• 9. “Some Improvements in Techniques, Light Reflectance Evaluation of Coarse Flotation Mica,” J. Philip Neal, January 1966. 6 pages.
• 8. “Heavy Liquid Separation Procedure,” P. N. Sales. Included in Minerals Research Laboratory Bulletin, Vol. 1, No. 3, November 1959. 3 pages.
• 7. Minerals Research Laboratory – A Brief History. Compiled by subcommittee of Laboratory Advisory Committee, January 1970. 8 pages.
• 6. “Minerals Research Lab Aids State Industry.” Article in Engineering Research News, Winter 1970. 1 page.
• 5. “University’s Minerals Lab in Asheville Plays Key Role in Aiding State’s Mineral Industries,” Mary N. Yionoulis. Article in The Journal of North Carolina State University, January 1970. 1 page.
• 4. “Minerals Research Laboratory Aids Phosphate Industry.” Article inEngineering Research News, July 1964. 1 page.
• 3. Progress Reports. Reports on non-confidential projects as listed in Newsletterand are available on request.
• 2. Minerals Research Laboratory Newsletter. Published quarterly since 1971. Lists available publications, current projects, and selected news briefs. 2 or 3 pages. Free.
• 1. Minerals Research Laboratory Bulletins. Published three or four times a year from 1959 to 1971. Reviews of Laboratory activities and news items. Replaced by Newsletter in 1971.