203 Matching Results

Search Results

Advanced search parameters have been applied.
in subjects: "Ore Processing"  
Results: 1 - 24 next
open access

Design requirements for uranium ion exchange from acidic solutions in a fluidized system

Description: A fluidized, countercurrent ion-exchange system was developed, operated, and evaluated by the Bureau of Mines in support of its objective to help assure an adequate uranium supply for future national needs. The system consisted of integrated multiple-compartment absorption and elution columns in which the solution flows are continuous, except for short periods when resin increments are withdrawn. The exchange of uranyl sulfate between a simulated acid-leach-uranium solution and a strong-base, i… more
Date: January 1, 1974
Creator: Traut, D.E.; Nichols, I.L. & Seidel, D.C.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Environmental Audit of the Grand Junction Projects Office

Description: The Grand Junction Projects Office (GJPO) is located in Mesa County, Colorado, immediately south and west of the Grand Junction city limits. The US Atomic Energy Commission (AEC) established the Colorado Raw Materials Office at the present-day Grand Junction Projects Office in 1947, to aid in the development of a viable domestic uranium industry. Activities at the site included sampling uranium concentrate; pilot-plant milling research, including testing and processing of uranium ores; and oper… more
Date: August 1, 1991
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Production of titanium from ilmenite: a review

Description: The general principles for beneficiation of titanium ores are reviewed and the specific processes used in individual units in various countries are discussed. This is followed by a critical evaluation of various current and potential reduction methods for the production of titanium metal from the processed concentrates. Finally, the report outlines a research program for the development of a commercially viable alternative method for the production of titanium metal.
Date: December 1, 1981
Creator: Kohli, R.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Engineering assessment of inactive uranium mill tailings, Rifle Site, Rifle, Colorado. Summary of the Phase II, Title I

Description: Ford, Bacon and Davis Utah Inc. has performed an engineering assessment of the problems resulting from the existence of radioactive uranium mill tailings at Rifle, Colorado. The Phase II - Title I services include the preparation of topographic maps, the performance of core drillings and radiometric measurements sufficient to determine areas and volumes of tailings and other radium-contaminated materials, the evaluation of resulting radiation exposures of individuals and nearby populations, the… more
Date: October 1, 1977
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Utilization of geothermal energy in the mining and processing of tungsten ore. Quarterly report

Description: The status of the engineering and economic feasibility study of utilizing geothermal energy for the mining and processing of tungsten ore at the Union Carbide-Metals Division Pine Creek tungsten complex near Bishop, Calfironia is reviewed. Results of geophysical data analysis including determination of assumed resource parameters are presented. The energy utilization evaluation identifies potential locations for substituting geothermal energy for fossil fuel energy using current technology. Pre… more
Date: February 1, 1980
Creator: Lane, C.K.; Erickson, M.V. & Lowe, G.D.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Engineering assessment of inactive uranium mill tailings, Maybell Site, Maybell, Colorado. Summary of the Phase II, Title I

Description: Ford, Bacon and Davis Utah Inc. has performed an engineering assessment of the problems resulting from the existence of radioactive uranium mill tailings at Maybell, Colorado. The Phase II-Title I services include the preparation of topographic maps, the performance of core drillings sufficient to determine areas and volumes of tailings and radiometric measurements to determine radium-contaminated materials, the evaluation of resulting radiation exposures of individuals and nearby populations, … more
Date: October 1, 1977
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Engineering assessment of inactive uranium mill tailings, Shiprock site, Shiprock, New Mexico. Phase II, Title I

Description: Ford, Bacon and Davis Utah Inc. has performed an engineering assessment of the problems resulting from the existence of radioactive uranium mill tailings at Shiprock, New Mexico. The Phase II, Title I services include the preparation of topographic maps, the performance of core drillings and radiometric measurements sufficient to determine areas and volumes of tailings and other radium-contaminated materials, the evaluation of resulting radiation exposures of individuals and nearby populations,… more
Date: March 31, 1977
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Engineering assessment of inactive uranium mill tailings, Monument Valley site, Monument Valley, Arizona. A summary of the Phase II, Title I

Description: Ford, Bacon and Davis Utah Inc. has performed an engineering assessment of the problems resulting from the existence of radioactive uranium mill tailings at the Monument Valley millsite in Arizona. The Phase II, Title I services include the preparation of topographic maps, the performance of core drillings and radiometric measurements sufficient to determine areas and volumes of tailings and other radium-contaminated materials, the evaluation of resulting radiation exposures of individuals resi… more
Date: March 31, 1977
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Radiological survey of the inactive uranium-mill tailings at Lakeview, Oregon

Description: The results of the radiological survey of the inactive uranium-mill site at Lakeview, Oregon, show that the average gamma-ray exposure rate 1 m above the tailings pile and the evaporation pond area (now dry) is close to the average background level for the area (11 ..mu..R/hr). The /sup 226/Ra concentration in most of the surface soil and sediment samples is also at or below the average background value for surface soil samples in the area (0.8 pCi/g). Calculated /sup 226/Ra concentrations, bas… more
Date: June 1, 1980
Creator: Haywood, F. F.; Burden, J. E.; Ellis, B. S.; Loy, E. T. & Shinpaugh, W. H.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Chemical Technology Division, Chemical Development Section C Progress Report for October-December 1961

Description: Recovery of Th (and U) from Granitic Rock. Recovery of Th by acid leaching ten addltlonal granite samples (36 to 82 ppm Th) from the Conway formation in N. H. ranged from about 50 to 85%, and averaged about 70%, Study of the effect of grind size on the recovery of Th from Conway and Plkes Peak granites showed no significant differences in the range minus 20 to minus 200 mesh. The Th concentration in a sized Conway granite sample was found to be much greater in the fine than in the coarse fracti… more
Date: February 21, 1962
Creator: Brown, K.B.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Environmental control technology for mining, milling, and refining thorium

Description: The purpose of this report is to evaluate, in terms of cost and effectiveness, the various environmental control technologies that would be used to control the radioactive wastes generated in the mining, milling, and refining of thorium from domestic resources. The technologies, in order to be considered for study, had to reduce the radioactivity in the waste streams to meet Atomic Energy Commission (10 CFR 20) standards for natural thorium's maximum permissible concentration (MPC) in air and w… more
Date: February 1, 1980
Creator: Weakley, S.A.; Blahnik, D.E.; Young, J.K. & Bloomster, C.H.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Mathematical model of the chemistry of the dump leaching of chalcopyrite

Description: In a leach dump, chalcopyrite is dissolved by Fe/sup 3 +/ and by O/sub 2/ and H/sup +/. Neither reaction is at equilibrium under operational conditions. The solution contains Fe(III), Fe(II) and Cu(II) in an aqueous sulfate medium with a pH of about 2. The equilibrium concentrations of H/sup +/, OH/sup -/, SO/sub 4//sup 2 -/, HSO/sub 4//sup -/, Fe/sup 3 +/, FeOH/sup 2 +/, Fe(OH)/sub 2//sup +/, Fe/sub 2/(OH)/sub 2//sup 4 +/, FeSO/sub 4//sup +/, Fe(SO/sub 4/)/sub 2//sup -/, FeHSO/sub 4//sup 2 +/,… more
Date: March 1, 1980
Creator: Liddell, K.C.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Utilization of geothermal energy in the mining and processing of tungsten ore. 2nd quarterly report

Description: The completed geochemical analysis of groundwater in the Pine Creek area for evaluation of the geothermal potential of this location is presented. Also included is an environmental constraints analysis of Pine Creek noting any potential environmental problems if a geothermal system was developed onsite. Design of a geothermal system is discussed for site-specific applications and is discussed in detail with equipment recommendations and material specifications. A preliminary financial, economic… more
Date: June 1, 1980
Creator: Erickson, M. V.; Willens, C. A.; Walter, K. M.; Carrico, R. L.; Lowe, G. D. & Lacy, S. B.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Engineering assessment of inactive uranium mill tailings, Naturita site, Naturita, Colorado. Phase II, Title I

Description: Ford, Bacon and Davis Utah Inc. has performed an engineering assessment of the problems resulting from the existence of radioactive uranium mill tailings at Naturita, Colorado. The Phase II, Title I services include the preparation of topographic maps, the performance of core drillings sufficient to determine areas and volumes of tailings, the performance of radiometric measurements to determine the extent of radium contamination, the evaluation of resulting radiation exposures of individuals a… more
Date: November 1, 1977
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Engineering assessment of inactive uranium mill tailings, Naturita site, Naturita, Colorado. A summary of the Phase II, Title I

Description: Ford, Bacon and Davis Utah Inc. has performed an engineering assessment of the problems resulting from the existence of radioactive uranium mill tailings at Naturita, Colorado. The Phase II, Title I services include the preparation of topographic maps, the performance of core drillings sufficient to determine areas and volumes of tailings, the performance of radiometric measurements to determine the extent of radium contamination, the evaluation of resulting radiation exposures of individuals a… more
Date: November 1, 1977
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Economics of large-scale thorium oxide production: assessment of domestic resources

Description: The supply curve illustrates that sufficient amounts of thorium exist supply a domestic thorium-reactor economy. Most likely costs of production range from $3 to $60/lb ThO/sub 2/. Near-term thorium oxide resources include the stockpiles in Ohio, Maryland, and Tennessee and the thorite deposits at Hall Mountain, Idaho. Costs are under $10/lb thorium oxide. Longer term economic deposits include Wet Mountain, Colorado; Lemhi Pass, Idaho; and Palmer, Michigan. Most likely costs are under $20/lb th… more
Date: February 1, 1980
Creator: Young, J.K.; Bloomster, C.H.; Enderlin, W.I.; Morgenstern, M.H.; Ballinger, M.Y.; Drost, M.K. et al.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Survey of LWR environmental control technology performance and cost

Description: This study attempts to establish a ranking for species that are routinely released to the environment for a projected nuclear power growth scenario. Unlike comparisons made to existing standards, which are subject to frequent revision, the ranking of releases can be used to form a more logical basis for identifying the areas where further development of control technology could be required. This report describes projections of releases for several fuel cycle scenarios, identifies areas where al… more
Date: March 1, 1980
Creator: Heeb, C. M.; Aaberg, R. L.; Cole, B. M.; Engel, R. L.; Kennedy, W. E., Jr. & Lewallen, M. A.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Breakthrough Energy Savings with Waterjet Technology

Description: Experiments performed at the University of Missouri-Rolla's Waterjet Laboratory have demonstrated clearly the ability of waterjets to disaggregate, in a single step, four different mineral ores, including ores containing iron, lead and copper products. The study focused mainly on galena-bearing dolomite, a lead ore, and compared the new technology with that of traditional mining and milling to liberate the valuable constituent for the more voluminous host rock. The technical term for the disint… more
Date: May 15, 2007
Creator: Saperstein, Lee W.; Grayson, R. Larry; Summers, David A.; Garcia-Joo, Jorge; Sutton, Greg; Woodward, Mike et al.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Technology demonstration for reducing mercury emissions from small-scale gold refining facilities.

Description: Gold that is brought from artisanal and small-scale gold mining areas to gold shops for processing and sale typically contains 5-40% mercury. The uncontrolled removal of the residual mercury in gold shops by using high-temperature evaporation can be a significant source of mercury emissions in urban areas where the shops are located. Emissions from gold shop hoods during a burn can exceed 1,000 mg/m{sup 3}. Because the saturation concentration of mercury vapor at operating temperatures at the h… more
Date: June 30, 2008
Creator: Habegger, L. J.; Fernandez, L. E.; Engle, M.; Bailey, J. L.; Peterson, D. P.; MacDonell, M. M. et al.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Smart Screening System (S3) In Taconite Processing

Description: The conventional vibrating machines used in processing plants have had undesirable high noise and vibration levels. They also have had unsatisfactorily low screening efficiency, high energy consumption, high maintenance cost, low productivity, and poor worker safety. These conventional vibrating machines have been used in most every processing plant. Most of the current material separation technology uses heavy and inefficient electric motors with an unbalance rotating mass to generate the shak… more
Date: September 1, 2004
Creator: Allaei, Daryoush; Mohammed, Asim Syed & Tarnowski, David
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Smart Screening System (S3) In Taconite Processing

Description: The conventional screening machines used in processing plants have had undesirable high noise and vibration levels. They also have had unsatisfactorily low screening efficiency, high energy consumption, high maintenance cost, low productivity, and poor worker safety. These conventional vibrating machines have been used in almost every processing plant. Most of the current material separation technology uses heavy and inefficient electric motors with an unbalanced rotating mass to generate the s… more
Date: March 1, 2006
Creator: Allaei, Daryoush; Wartman, Ryan; Tarnowski, David & Mohammed, Asim Syed
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Improving Energy Efficiency Via Optimized Charge Motion and Slurry Flow in Plant Scale Sag Mills

Description: A research team from the University of Utah is working to make inroads into saving energy in these SAG mills. In 2003, Industries of the Future Program of the Department of Energy tasked the University of Utah team to build a partnership between the University and the mining industry for the specific purpose of reducing energy consumption in SAG mills. A partnership was formed with Cortez Gold Mines, Outokumpu Technology, Kennecott Utah Copper Corporation, and Process Engineering Resources Inc.… more
Date: July 21, 2006
Creator: Rajamani, Raj K.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Disposal and reclamation of southwestern coal and uranium wastes

Description: The types of solid wastes and effluents produced by the southwestern coal and uranium mining and milling industries are considered, and the current methods for the disposal and reclamation of these materials discussed. The major means of disposing of the solid wastes from both industries is by land fill or in some instances ponding. Sludges or aqueous wastes are normally discharged into settling and evaporative ponds. Basic reclamation measures for nearly all coal and uranium waste disposal sit… more
Date: January 1, 1979
Creator: Wewerka, E. M.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
Back to Top of Screen