An introduction to cut-off grade estimation /

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An Introduction to Cut-off Grade Estimation examines one of the most important calculations in the mining industry. Cut-off grades are essential to determining the economic feasibility and mine life of a project. Increased cut-off grades can reduce political risks by ensuring higher financial return...

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Detalles Bibliográficos
Clasificación:Libro Electrónico
Autor principal: Rendu, Jean-Michel, 1944-
Formato: Electrónico eBook
Idioma:Inglés
Publicado: Littleton, CO : Society for Mining, Metallurgy, and Exploration, 2008.
Edición:1st ed.
Temas:
Ores > Grading.
Ores > Sampling and estimation.
Minerais > Classement.
Minerais > Échantillonnage et estimation.
Ores > Grading
Ores > Sampling and estimation
Acceso en línea:Texto completo
Tabla de Contenidos:
  • Preface
  • Introduction
  • General principles
  • Mathematical Formulation
  • Cut-off Grade and Grade-Tonnage Relationship
  • Direct Profit and Loss
  • Opportunity Costs and Benefits
  • Cut-off Grade Optimization with Opportunity Costs
  • Other Costs and Benefits
  • Minimum cut-off grades
  • Cut-off Grade Between Ore and Waste
  • Cut-off Grade for Material at the Bottom of an open pit mine
  • Cut-off Grades in Underground Mines
  • Cut-off Grade to Choose Between Processes
  • Cut-off Grade Between Waste and Low-grade Stockpile
  • Cut-off Grade with Variable Recoveries
  • Opportunity Cost of Not Using the Optimum Cut-off Grade
  • Cut-off grade for polymetallic deposits
  • General Considerations
  • Calculation of Cut-off Grades Using Net Smelter Return
  • Calculation and Rcporting of Metal Equivalent
  • Cut-off grade and optimization of processing plant operating conditions
  • Mathematical Formulation
  • Example: Optimization of Grinding Circuit in a Copper Mine
  • Cut-off grade and mine planning
  • open pit and underground selective mining
  • Open Pit Mine: Economic Valuation of a Pushback
  • Underground Mine: Economic Valuation of a Stope
  • Similarities Between Open Pit and Underground Mine Planning
  • Cut-off grade and mine planning
  • block and panel caving
  • Constraints Imposed by Block and Panel Caving
  • Marginal Cut-off Grade and Draw Point Management
  • Marginal Cut-off Grade and Block Design
  • Influence of Capital Cost and Discount Rate
  • Opportunity Cost
  • Which costs should be included in cut-off grade calculations
  • When marginal analysis no longer applies: a gold leaching operation
  • Mining capacity and cut-off grade when processing capacity is fixed
  • Processing capacity and cut-off grade when mining capacity is fixed
  • Mining and processing capacity and cut-off grade when sales volume is fixed
  • Fixed Sales with No Mining or Processing Constraint
  • Fixed Sales and Fixed Processing Rate with No Mining Constraint
  • Fixed Sales and Fixed Mining Rate with No Processing Constraint
  • Releasing capacity constraints: a base metal example
  • Relationship between mine selectivity, deposit modeling, ore control, and cut-off grade
  • Conclusions
  • Bibliography
  • Symbols
  • Index
  • About the author.

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