Results 81 to 90 of about 56,332 (307)

Study on low-grade galena-barite ore beneficiation in Khuzdar, Balochistan, Pakistan [PDF]

open access: yes, 2019
Purpose. Galena and barite are the principal minerals of lead and barium respectively. Both minerals are used extensively in industries because of their distinct properties.
Bashir, F   +6 more
core   +1 more source

Impacts of Uncertain Permeability Fields on the Transient Hydrologic Response in Coupled Surface‐Subsurface Simulations of a Headwaters Catchment

open access: yesWater Resources Research, Volume 61, Issue 10, October 2025.
Abstract Modern integrated hydrologic models (IHMs) are powerful tools for investigating coupled hydrologic system dynamics. The tradeoff for this realism is a high computational burden and large numbers of parameters in each cell, few of which can be specified with a high degree of confidence. These factors combined make uncertainty quantification (UQ)
Nicholas B. Engdahl
wiley   +1 more source

Comparative Microstructure Characteristics of Synthesized PbS Nanocrystals and Galena

open access: yesSci
Lead sulfide (PbS) on the nanoscale was synthesized via a chemical route at room temperature using lead nitrate {Pb(NO3)2} and sodium sulfide (Na2S). The Na2S was prepared at ~105 °C using sodium hydroxide (NaOH) and sulfur (S) powder.
Ehab AlShamaileh   +6 more
doaj   +1 more source

Oxygen application to chloride leaching of complex sulfide ores [PDF]

open access: yes, 1987
The study investigates leaching of complex sulfide ores with simultaneous regeneration of the leaching solution and removal of dissolved iron to balance the iron concentration in the leaching process.
Chou, Kuo Tung
core  

Research on Process Mineralogy of a Refractory Lead-zinc Ore in Chengde, Hebei and Analysis of Factors Affecting Flotation

open access: yesKuangchan zonghe liyong
Based on fluorescence spectrum analysis and chemical multi-element analysis, through the process mineralogy study of a refractory lead-zinc mine in Hebei, the mineral composition, structure, main mineral embedding characteristics of the ore and the ...
Guanglin QIN
doaj   +1 more source

Las mineralizaciones filonianas de fluorita (galena) del Calar de San José (sierra de Baza, cordilleras Béticas)

open access: yesEstudios Geologicos, 1984
El distrito de F-(Pb, Zn, Ba) de la Sierra de Baza (al SE de España) está constituido fundamentalmente por mineralizaciones estratiformes y estratoligadas de fluorita-(galena), enclavadas en niveles carbonatados del Ladiniense Superior-Carniense.
J. Torres-Ruiz, F. Delgado
doaj   +1 more source

Correction: Selective Adsorption Mechanism of Zinc Ions on the Surfaces of Galena and Sphalerite in the Flotation Separation of Pb-Zn [PDF]

open access: bronze, 2023
Feng Zhang   +6 more
openalex   +1 more source

Economic Feasibility of North Slope Propane Production and Distribution to Select Alaska Communities [PDF]

open access: yes, 2010
Could propane from Alaska’s North Slope reduce energy costs for electric utilities and residential space heating, water heating, and cooking demands? We explored the hypothesis that propane is a viable alternative for fourteen selected communities along ...
Fay, Ginny, Schwörer, Tobias
core  

Enrichment in critical metals (In-Ge) and Te-Se in epithermal deposits of the 'La Carolina' district, San Luis, Argentina [PDF]

open access: yes, 2018
This study was supported by the ‘Proyecto de Ciencia y Técnica P-3-2-0414, of the National University of San Luis’ and by the Project CGL2016-76532-R from the MINECO of ...
Cepedal Hernández, María Antonia   +3 more
core   +2 more sources

Effective Lower Bounding Techniques for Pseudo-Boolean Optimization

open access: yes, 2005
Linear Pseudo-Boolean Optimization (PBO) is a widely used modeling framework in Electronic Design Automation (EDA). Due to significant advances in Boolean Satisfiability (SAT), new algorithms for PBO have emerged, which are effective on highly ...
Manquinho, V., Marques-Silva, J. P.
core   +2 more sources

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