How do development, production, grade, recovery, and commodity-price assumptions shape the mine plan?
Model profile
Tin Small-Scale Mining
A small-scale tin miner or cooperative, set up for Rwanda or for any country you choose: weathered pegmatite dug free and treated in the mine's own gravity plant, the tagged cassiterite concentrate sold to a licensed exporter or the LuNa smelter in Kigali. Other cases: coltan recovered with the tin, a hard-rock pegmatite crushed and milled, the concentrate exported to a smelter in Asia, a cooperative paying a toll plant, and the 2025 tin price. Tested the way a buyer and a lender would: the tin grade and recovery, the LME price and what the buyer pays for it, traceability, the royalty, the rains, and debt sized on the cash the mine can service.
Decision scope
Questions this model helps you examine
What capital, operating cost, closure provision, and financing structure are required?
How do price, grade, recovery, cost, and schedule downside cases affect investment returns?
Model capabilities
What this model includes
The profile below is generated from the same catalogue and workspace definitions used by the application.
- A 10-year mine plan in per cent tin, with a resource limit and an exploration stage
- Eluvial, alluvial, old dumps or hard rock, with drilling and blasting only for hard rock
- An own gravity plant, or own sluices with the pre-concentrate upgraded at a toll plant
- Cassiterite concentrate paid on its tin at a share of the LME price, less treatment charges and penalties
- Coltan and other co-products, each with its own price, payability and royalty
- Plant, equipment and crews that scale with throughput
- A researched Rwanda profile with the 2024 minerals tax law, and every other country selectable
- Mine-site traceability tagging, and the licence type, term and area rules
- Local-currency costs, and a local-currency or dollar loan
- Debt sized and sculpted on cash available for debt service, with a reserve, a lease and a buyer prepayment
- Cost per tonne of tin net of co-products, break-even tin price, payability and grade
- A tin price deck, named scenarios, an NPV tornado and a Monte Carlo
Build the case
Inputs and workspaces
- CasesLoad the own gravity plant, coltan, hard-rock, export, cooperative or 2025 price case
- Mine and costsCountry, licence type, term and area, geology and resource, throughput, the tin price, unit costs, diesel and the local currency
- Mine planThroughput, utilisation, strip ratio, grade, recovery, price and payability by year
- SeasonalityHow the rains spread production across the months
- Processing and saleGravity plant or toll plant, concentrate grade, traceability, buyer terms and settlement
- Co-products, penalties, royalty and routeColtan and other co-products, iron and arsenic penalties, the sliding-scale royalty and the ore and concentrate route
- Staff and operating costsPositions, pay, start dates, sizing from productivity, and other operating expenses
- Initial costs and assetsStart-up costs, the four asset classes, replacement and the lease share
- FinancingEquity, the start-up gap, the term loan and its sizing, the reserve, the lease and the prepayment
- Fiscal and permitsTax regime, royalty, export tax, levies, the rehabilitation fund and VAT
- Valuation and riskCost of capital, rehabilitation, closure and salvage, the tin price deck and the Monte Carlo
- Due diligenceLicence, environment, traceability, offtake, resource, responsible sourcing, safety and the community agreement
Review the result
Outputs and analysis
- Project NPVUSD, at WACC
- Project IRRUnlevered, after tax
- WACCDiscount rate
- PaybackMonths
- Minimum DSCRYears principal is repaid
- Loan life cover ratioAt first repayment
- Term loanSized by the model
- Total fundingAll sources
- 21 additional metrics in the workspace
- Financial statementsDetailed schedules
- Lender view, mine plan, funding & valuationDetailed schedules
- Risk & analyticsDetailed schedules
Designed for review
Who this model is for
- Mine owners and project sponsors
- Technical and operating teams
- Financial advisers
- Investors and lenders
Governed evidence
The review trail stays with the result.
Each completed calculation preserves the model version, saved inputs, reporting-currency snapshot, immutable run, and result fingerprint used for its reports.
- Version-controlled calculation logic
- Saved assumptions and scenarios
- Immutable calculation runs
- Reporting context preserved in exports
Ready to explore the case?