Lecture 1-3 MetE 197
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Transcript of Lecture 1-3 MetE 197
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Lecture No. 1
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Role of mining and processing of rawmaterials
Diversification of multinational miningcompanies grass roots exploration tosmaller resource companies
Level of exploration declined in 1990’s due todepressed metal prices and availability offunds
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Exploration – successful exploration willresult in dramatic increase in value of the
company Definition – quantity and quality of resource Feasibility studies – economic viability of the
resource Development – if project is justified Extraction – taking the ore from the orebody
and separating from the waste rock
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Processing – mineral processing,beneficiation, extractive processes
Refining – further processing to producesaleable commodity
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Volatility of share prices Exploration – necessity, therefore higher risk
Finite reserves – definite volume, finite life
Proven Reserve Probable Reserve Measure Resource
Tonnage: 2 million Tonnage: 3 million Tonnage: 8 million
Grade: 1.2% Cu Grade: 1.0% Cu Grade: 0.8% Cu
Cu: 24,000MT Cu: 30,000MT Cu: 64,000 MT
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Great effect on the value of the company Reliance on International Commodity prices
Dependent on demand and economicconditions globally
Effect of exchange rate – most prices arequoted in US$
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Exploration – funds are needed to define anddelineate reserves – speculative.
Economics of scale – continuing decline ofthe quality of ore reserves – move largevolume of material
Isolation – remote location of mineralreserves result in high cost of infrastructure
Power and water – requirement in all miningoperations
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Ensure minimum impact on environment Environmental impact statement (EIS)
Processing Water consumption
Carbon dioxide emission
SO2 emissions Decommissioning
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Surface owners Indigenous people
Local government units
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Lecture No. 2
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Analysis of financial data Forecast the future financial performance of
the company
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Capital Costs Revenue
Operating Costs Other costs Depreciation Taxation Cash flow
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Developing access to the orebody Mining equipment
Processing plant Support infrastructure – power
station/transmission, water source, airports,housing, roads, etc.
Replacement of old equipment Working capital
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Price of product x quantity sold Importance of forecasting of prices
Exchange rate Production schedule Marketing costs plus insurance and
transportation must be deducted
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Day to day cost of production and processing Include: Consumables – chemicals & explosives
Wages
Transportation
Power Commonly quoted in cost/ton or ore mined or
cost/ton ore milled Total cost usually in cost/production: i.e. US$/lb
Cu produced
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State royalties Leasing costs
Interest or financing costs
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Non-cash item Recovery of capital expenditure over the life
of the project for tax purposes Defines the “book” value of capital or assets
of the company
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Varying rates Varies from country to country
Royalties from the sale of mineral products iscalled “excise tax”
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Cash needed to get the project into operation(negative)
Cash from the project the owners get afterdeducting all costs (positive)
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Lecture No. 3
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Feasible – practicable and possible In resource industry
Physical aspects – i.e. reserves, location Economic aspects – cost, metal prices
Risk of failure vs. financial reward Initially, inferred from previous success “back of the envelope” valuation
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Best mine configuration based on currentknowledge of the orebody
An estimate of likely operating and capitalcosts Initial metallurgical studies (bench tests) to
determine likely mill design and likelyrecovery
Availability of power, water, transport andinfrastructure requirements
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Environmental issues Product markets and future commodity price
profile Preliminary financial model
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Grade Tonnage
Recovery Mining rate Open cut or underground mining Capital cost Operating cost
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Studies Cost Time Accuracy
Scoping $100,000s months Low
Pre-feasibility $millions months Fair
Final/BankableFeasibility &EngineeringDesign
$10 millions Year (s) Good
ConstructionphaseDetailedengineering
Variable Year(s) Very Good
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Summary and recommendations Mine location and description
Development plan Plant product and capacity
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Topographical maps Soil/geology reports
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Geology Resource and reserves
Geo-technical Mine plan Mine production schedule Mine equipment Mine services
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Site plan Process flow sheets
Energy balance Material balance Heat balance Major equipment Minor equipment General arrangement drawings Detailed structural drawings
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Building and piping drawings Electrical drawings
Management systems Equipment vendors
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Environmental policy and plan Environmental risks
Health and safety risks Environmental impact assessment Environmental permits issued Environmental monitoring plan Statutory requirements Closure plan
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Project plan Project business systems Cash flow forecast Construction work plan Construction contract configuration Construction schedule
Future work Labor rates Labor productivity Construction equipment
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Major equipment bids Minor equipment bids
Site preparation, earthwork Building foundations Equipment foundations Structural steel Cladding Architectural Mechanical
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Staffing levels Labor rates
Consumable/utility consumption Maintenance supplies Spares Power and water unit costs Fuel unit costs Supplies and reagents unit costs Transport and logistics
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Working capital Sustaining/replacement capital
Training Ramp up Insurances Escalation Foreign currency provisions Target accuracy
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Determine the profits and cash flow for theequity holders
Valuation methods are employed todetermine financial viability Sensitivity and probability analysis consider
issues such as project risk
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Financing for capital expenditures Assets of the project are used as collateral,
not the assets of the borrower
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Cash flow should show that there are enoughfunds for payment of the interest
Debt service coverage ratio Compare present value of forecast cash flow
available for financing with the principaloutstanding
Life of the project debt service coverage ratio
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Advantages:
Provides capital allowing the corporate to own
multiple projects
Relatively low cost finance
Worldwide capital market
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Disadvantages: Longer transaction time
Higher fixed cost with restrictive covenants Extensive hedging to mitigate commodity
price risk Increased level of due diligence and frequent
monitoring of performance Default with the lender gaining ownership of
the asset
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Reserves Markets and commodity pricing
Construction time and costs Operational costs Political, labor and environmental issues Ownership, tenure and tax
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Debt service coverage ratio – ability for theproject to repay debt periodically
Cash flow available for debt service (CFADS)
divided by
Debt service, where debt service = principal plus
debt
If DSCR 1.2