| Deposit ID | 10207003 |
|---|---|
| MAS/MILS ID | 4050250002 |
| Record type | Site |
| Current site name | Kotalahti |
| Alternate or previous names | No Alternative Name |
| Geographic coordinates: | 27.68092, 62.52234 (WGS84) |
|---|---|
| Elevation | 150 |
Political divisions (FIPS codes)
Finland(country)
Europe(continent)
Land(continent)
| Country |
|---|
| Finland |
| Materials | Type of material |
|---|---|
| Chalcopyrite | Unknown |
| Pentlandite | Unknown |
| Pyrrhotite | Unknown |
| (1) | 27.68092, 62.52234 |
|---|
| Length | 1300M | ||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Width | 100M | ||||||||||||||||||||||||
| Depth to top | 250M | ||||||||||||||||||||||||
| |||||||||||||||||||||||||
| Operation type | Underground |
|---|---|
| Development status | Producer |
| Commodity type | Metallic |
| Significant | No |
| Discovery year | 1954 |
| Mining method | Open Stope |
| Milling method | Flotation |
| Type | Owner-Operator |
|---|---|
| Owner | Outokumpu Oy |
| Home office | Finland |
| Year | 1981 |
| Type of workings | Underground | ||||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Overall depth | 680M | ||||||||||||||||||||||||||||||||||
| |||||||||||||||||||||||||||||||||||
| Agency | Database name | Acronym | Record ID | Notes |
|---|---|---|---|---|
| U.S. Bureau of Mines | Minerals Availability System | MAS | 4050250002 |
RECOVERY," ENGINEERING AND MINING JOURNAL. NOV. PP.
103-107.
E/MJ INTERNATIONAL DIRECTORY OF MINES. 1980. P. 290.
KOTALAHTI NICKEL, COPPER OPENED 1959, CONCENTRATORS OF
OUTOKUMPO OY FINLAND, COMPANY PROMOTIONAL MATERIAL.
KOTALAHTI, MINES AND MINING AT OUTOKUMPO OY FINLAND,
COMPANY PROMOTIONAL MATERIAL.
PAPUNEN, HEIKKI, SULFIDE MINERALOGY OF THE KOTALHTI AND
HITURA NICKEL-COPPER ORES, FINLAND, ANNALES ACADEMIAE
SCIENTIARUM FINNICAE. 1971. PP. 11-23
THE CONCENTRATION OF OUTOKUMPU OY; 1975 E/MJ INTERNATIONAL
DIRECTO RV OF MINING P 223.
ANON. 1973. "SMELTING AND REFINING: A STUDY IN RESOURCE
| Subject category | Comment text |
|---|---|
| Deposit | 450000 TONS/YR. SEPARATION IS BY FLOTATION AND BOTH CU AND N1 CONCENTRATES ARE EXTRACTED. THE N1 CONC. CONSISTS OF PENTLANDITE AND PYRRHOTITE MINERALS,THE AMOUNT OF N1 IN THE PYRRHOTITE IS EQUAL TO 20% OF TOTAL N1 RECOVERY. PYRRHOTITE ALSO ACTS AS A FUEL IN THE FLASH SMELTING PROCESS CRUSHING-RUN OF MINE ORE IS CRUSHED UNDERGROUND IN 2 SUCCESS SIVE VAN CRUSHERS PRODUCING 100% -200MM. ORE IS AUTOMATICALL Y HOISTED TO A 300 TON STORAGE BIN LOCATED IN THE HEADFRAME ORE MOVES TO 5 FT SYMONS STANDARD CONE CRUSHER FOLLOWED BY DOUBLE-DECK VIBRATING SCREEN FOLLOWED BY SYMONS SHORTHEAD CONE CRUSHER. THE CAPACITY OF THE CRUSHING PLANT IS 100-170 TPH PRODUCT BEING 80%-10MM OPERATES 2 SHIFTS GRINDING-ORE IS GROUND IN 2 STAGES IN 1 ROD MILL AND 2 PEBBLE MILLS. THE ROD MILL IS IN OPEN CIRCUIT AND THE PEBBLE MILLS ARE IN CLOSED CIRCUIT WITH HYDROCYCLONE CLASSIFIERS, FLOTATION: N1 CONC-5.73% N1, 91.6% RECOVERY, 0.86% CU, CU RECOVERY 32.5%, S-29.2%, INSOLUBLE-18. 8%, M60 4.6%; CU CONC- % N1 -1.08, RECOVERY N1-.9, %CU-27.1, CU RECOVERY 56.2%, S-29.8%, INSOLUBLE-7.5%. TAILINGS DISPOSAL-COARSEST FRACTION IS SEPARATED FROM THE PULP BY HYDROCYCLONES AND IS USED AS BACKFILL MATERIAL IN THE MINE. A SMALL LAKE NEARBY IS USED AS TAILING AREA. MAX PUMPING DISTANCE IS ABOUT 1200M, OVERFLOW WATER FROM TAILING AREA IS CLEAR AND PH OF 7. AVERAGE ENERGY CONSUMPTION OF MILLING IS 22.0 KWH /TON. WATER FOR MILLING IS SUPPLIED FROM A NEARBY RIVER, THE CONSUMPTION BEING ABOUT 2.9 CU M/TON OF MILLED ORE, ONLY FRESH WATER IS USED, ORE GRADE - 0.75%. MILLING CAPACITY OF THE MILL IS 55 M TONS OF ORE/HR OR |
| Type | Date | Name | Affiliation | Comment |
|---|---|---|---|---|
| Reporter | 19-APR-1995 | Gazdik | U.S. Bureau of Mines |
Supplemental information added by qvyshift.com. Not part of the original USGS MRDS record.