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Kittilä Mine
Kittilä mine, also known as Suurikuusikko mine, is a gold gold mining, mine in Kittilä, in the Lapland (Finland), Lapland County of Finland. The mining, mine is owned and operated by Agnico-Eagle Mines Limited and is located north-east of Kittilä. It is the largest gold mine in Europe. Exploration began in 1986, and production started in 2008. The mine is composed of two open-pit mining, open pits, with the proceeds of the operation funding an underground mining (hard rock), underground mining operation, accessed by a ramp from surface and utilizing both transverse and longitudinal Stoping (mining method), long-hole stoping methods. The mine utilizes on-site mineral processing, concentrating to produce Doré bars for shipment off-site for refinement, and produced of gold in 2009. History In 1986 gold was discovered near the town of Kittilä. The Geological survey, Geological Survey of Finland initiated exploration which resulted in a discovery of Mineralization (geology), go ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Kittilä
Kittilä (, , ) is a municipalities of Finland, municipality of Finland and a popular holiday resort. It is located in northern Finland north of the Arctic Circle within the Lapland (Finland), Lapland Regions of Finland, region. The municipality has a population of () and covers an area of of which is water. The population density is . Kittilä is famous for being the location of the lowest recorded temperature in Finnish history: , measured in January 1999 in Pokka. The "midnight sun" is above the horizon from 29 May to 16 July, and the period with continuous daylight lasts a bit longer, polar night from 14 December to 29 December. Climate Kittilä has a subarctic climate (Köppen climate classification, Dfc) as a result of its northerly location and being far inland, which renders strong seasonal shifts. The midnight sun, sun does not set between 30 May and 15 July (47 days), and white nights lasts from early May to early August. polar night, The period that the sun does not ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mining Feasibility Study
A mining feasibility study is an evaluation of a proposed mining project to determine whether the mineral resource can be mined economically. There are three types of feasibility study used in mining, order of magnitude, preliminary feasibility and detailed feasibility. Order of magnitude Order of magnitude feasibility studies (sometimes referred to as "scoping studies") are an initial financial appraisal of an inferred mineral resource. Depending on the size of the project, an order of magnitude study may be carried out by a single individual. It will involve a preliminary mine plan, and is the basis for determining whether to proceed with an exploration program, and more detailed engineering work. Order-of-magnitude studies are developed by copying plans and factoring known costs from existing projects completed elsewhere and are accurate to within 40–50%. Preliminary feasibility Preliminary feasibility studies or "pre-feasibility studies" are more detailed than order of mag ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gangue
Gangue () is the commercially worthless material that surrounds, or is closely mixed with, a wanted mineral in an ore deposit. It is thus distinct from overburden, which is the waste rock or materials overlying an ore or mineral body that are displaced during mining without being processed, The separation of valuable mineral from gangue minerals is known as mineral processing, mineral dressing, or ore dressing. It is a necessary, and often significant, aspect of mining. It can be a complicated process, depending on the nature of the minerals involved. For example, galena, an ore of lead, is usually found in large pieces within its gangue, so it does not normally need extensive processing to remove it; but cassiterite, the chief ore mineral of tin, is usually disseminated as very small crystals throughout its gangue, so when it is Underground mining (hard rock), mined from hard rock, the ore-bearing rock first needs to be crushed very finely, and then has to be subjected to sophi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sulfide
Sulfide (also sulphide in British English) is an inorganic anion of sulfur with the chemical formula S2− or a compound containing one or more S2− ions. Solutions of sulfide salts are corrosive. ''Sulfide'' also refers to large families of inorganic and organic compounds, e.g. lead sulfide and dimethyl sulfide. Hydrogen sulfide (H2S) and bisulfide (HS−) are the conjugate acids of sulfide. Chemical properties The sulfide ion does not exist in aqueous alkaline solutions of Na2S. Instead sulfide converts to hydrosulfide: :S2− + H2O → SH− + OH− Upon treatment with an acid, sulfide salts convert to hydrogen sulfide: :S2− + H+ → SH− :SH− + H+ → H2S Oxidation of sulfide is a complicated process. Depending on the conditions, the oxidation can produce elemental sulfur, polysulfides, polythionates, sulfite, or sulfate. Metal sulfides react with halogens, forming sulfur and metal salts. :8 MgS + 8 I2 → S8 + 8 MgI2 Metal de ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mill (grinding)
A mill is a device, often a structure, machine or kitchen appliance, that breaks solid materials into smaller pieces by grinding, crushing, or cutting. Such comminution is an important unit operation in many processes. There are many different types of mills and many types of materials processed in them. Historically, mills were powered by hand or by animals (e.g., via a hand crank), working animal (e.g., horse mill), wind ( windmill) or water (watermill). In the modern era, they are usually powered by electricity. The grinding of solid materials occurs through mechanical forces that break up the structure by overcoming the interior bonding forces. After the grinding the state of the solid is changed: the grain size, the grain size disposition and the grain shape. Milling also refers to the process of breaking down, separating, sizing, or classifying aggregate material (e.g. mining ore). For instance rock crushing or grinding to produce uniform aggregate size for construc ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Crusher
A crusher is a machine designed to reduce large rocks into smaller rocks, gravel, sand or rock dust. Crushers may be used to reduce the size, or change the form, of waste materials so they can be more easily disposed of or recycled, or to reduce the size of a solid mix of raw materials (as in rock ore), so that pieces of different composition can be differentiated. Crushing is the process of transferring a force amplified by mechanical advantage through a material made of molecules that bond together more strongly, and resist deformation more, than those in the material being crushed do. Crushing devices hold material between two parallel or tangent solid surfaces, and apply sufficient force to bring the surfaces together to generate enough energy within the material being crushed so that its molecules separate from (fracturing), or change alignment in relation to (deformation), each other. The earliest crushers were hand-held stones, where the weight of the stone provided a boost ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Strike And Dip
In geology, strike and dip is a measurement convention used to describe the plane orientation or Attitude (geometry), attitude of a Plane (geometry), planar Geology, geologic feature. A feature's strike is the azimuth of an imagined horizontal line across the plane, and its dip is the angle of inclination (or depression angle) measured downward from horizontal. They are used together to measure and document a structure's characteristics for study or for use on a geological map. A feature's orientation can also be represented by dip and dip direction, using the azimuth of the dip rather than the strike value. Linear features are similarly measured with trend and plunge, where "trend" is analogous to dip direction and "plunge" is the dip angle. Strike and dip are measured using a compass and a clinometer. A compass is used to measure the feature's strike by holding the compass horizontally against the feature. A clinometer measures the feature's dip by recording the inclination pe ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
The Northern Miner (Canada)
''The Northern Miner'' is a weekly trade journal (formerly part of the Hollinger group) that reports on the mining industry. ''The Northern Miner'' began publication in Cobalt, Ontario, Canada, in 1915, and has since moved publication to Toronto Toronto ( , locally pronounced or ) is the List of the largest municipalities in Canada by population, most populous city in Canada. It is the capital city of the Provinces and territories of Canada, Canadian province of Ontario. With a p .... The weekly journal is considered to be the "leading authority on the mining industry in Canada", and " the mining industry's bible". References 1915 establishments in Ontario Trade magazines published in Canada Weekly magazines published in Canada Magazines established in 1915 Magazines published in Toronto {{mining-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Stripping Ratio
In surface mining, stripping ratio or strip ratio refers to the amount of waste (or overburden) that must be removed to release a given ore quantity. It is a number or ratio that express how much waste is mined per unit of ore. The units of a stripping ratio can vary between mine types. For example, in coal mining the stripping ratio is commonly referred to as volume/weight., whereas in metal mining, stripping ratio is unitless and is expressed as weight/weight. A stripping ratio can be expressed as a ratio or as a number. Equations The equations for stripping ratio are, for coal: :\frac for metal: :\frac where volume is typically expressed as m3 or yd3 and weight is typically expressed as tonne or ton. Use It is common for the stripping ratio to be used as an indicator of economic value for an open pit mine. This is because removal of waste is a cost to the mine whereas mining ore leads to revenue. A stripping ratio is commonly used as a quick method to evaluate a mine’s o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Caterpillar Inc
Caterpillar Inc., also known as Cat, is an American construction, mining and other engineering equipment manufacturer. The company is the world's largest manufacturer of construction equipment. In 2018, Caterpillar was ranked number 73 on the ''Fortune'' 500 list and number 265 on the Global ''Fortune'' 500 list. Caterpillar stock is a component of the Dow Jones Industrial Average. Caterpillar Inc. traces its origins to the 1925 merger of the Holt Manufacturing Company and the C. L. Best Tractor Company, creating a new entity, California-based Caterpillar Tractor Company. In 1986, the company reorganized itself as a Delaware corporation under the current name, Caterpillar Inc. It announced in January 2017 that over the course of that year, it would relocate its headquarters from Peoria, Illinois, to Deerfield, Illinois, scrapping plans from 2015 of building an $800 million new headquarters complex in downtown Peoria. Its headquarters are located in Irving, Texas, since 2022 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Caterpillar 777 Dump Truck
The Caterpillar 777 is a 100-ton haul truck, typically used in open pit mining, manufactured by Caterpillar Inc Caterpillar Inc., also known as Cat, is an American construction, mining and other engineering equipment manufacturer. The company is the world's largest manufacturer of construction equipment. In 2018, Caterpillar was ranked number 73 on the ' .... The first model of Caterpillar 777 was introduced in 1974. Its diesel engine is capable of putting out . The 777D, introduced in 1996, was powered by a diesel. References Dump trucks Off-road vehicles Mining equipment Caterpillar Inc. trucks Articles containing video clips Vehicles introduced in 1974 {{truck-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
