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Musselwhite Mine
The Musselwhite mine is one of the largest gold mines in Canada and in the world. The mine is located in the centre of the country in Ontario. The mine has estimated reserves of of gold. Operation Musselwhite mine uses a gold cyanidation and CIP (carbon in pulp) extraction process. Ore is extracted via a blast hole process and moved via a series of scoop-trams and underground dump trucks to one of 2 rockbreakers, either on the surface or at a 400 meter level. The ore then travels once through a jaw crusher and through a series of conveyor belts and continuously along a cone crusher rock sizing circuit. When the ore reaches a specific size it is transported to the mill building where the ore passes once through a rod mill and multiple times through a ball mill until the slurry is ground to approximately 10 μm. The slurry is then thickened, exposed to a cyanide treatment to extract it from the ore and into the solution, absorbed from the solution with activated c ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Kenora District
Kenora District is a district and census division in Northwestern Ontario, Canada. The district seat is the City of Kenora. It is geographically the largest division in Ontario: at , it covers 38 percent of the province's area, making it larger than Newfoundland and Labrador, and slightly smaller than Sweden or roughly the land size of California. Kenora District also has the lowest population density of any of Ontario's census divisions (it ranks 37th out of 50 by total population). The district was created in 1907 from parts of Rainy River District. The northern part (north of the Albany River) only became part of Ontario in 1912 (transferred from the Northwest Territories).''The Ontario Boundaries Extension Act'', S.C. 1912 (CA), 2 Geo. V, c. 40. The separate Patricia District upon transfer, it was in 1937 annexed to Kenora District and known sometimes as the Patricia Portion. [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Solution (chemistry)
In chemistry, a solution is a special type of homogeneous mixture composed of two or more substances. In such a mixture, a solute is a substance dissolved in another substance, known as a solvent. If the attractive forces between the solvent and solute particles are greater than the attractive forces holding the solute particles together, the solvent particles pull the solute particles apart and surround them. These surrounded solute particles then move away from the solid solute and out into the solution. The mixing process of a solution happens at a scale where the effects of chemical polarity are involved, resulting in interactions that are specific to solvation. The solution usually has the state of the solvent when the solvent is the larger fraction of the mixture, as is commonly the case. One important parameter of a solution is the concentration, which is a measure of the amount of solute in a given amount of solution or solvent. The term " aqueous solution" is used ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pickle Lake
Pickle Lake is a township in the Canadian province of Ontario, and is the most northerly community in the province that has year-round access by road. Located north of Thunder Bay, highway access is via Highway 599, the only access road to the town from the south. More northerly communities rely on winter roads for access and are cut off to land travel in the summer. Highway 599 meets the Northern Ontario Resource Trail, formerly Tertiary Highway 808, at Pickle Lake. The Township of Pickle Lake has a population of 425 and its main industries are transportation (by air and land) and tourism. Pickle Lake Airport serves as the supply point to northern First Nations. It is an access point for animal watching, with many opportunities to view moose, woodland caribou, timber wolf, black bear, game birds, bald eagles, song birds, and migratory birds such as ducks and geese. It is also a popular fishing and hunting destination. The town is sometimes referred to as the gateway to Ontario ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ear Falls
Ear Falls is a township located in Northwestern Ontario, Canada, on the banks of the English River, Lac Seul, Pakwash Lake and Wenesaga Lake. It is located along Highway 105, north of Highway 17 and Vermilion Bay, about halfway between Highway 17 and Red Lake, or about northwest of Thunder Bay. Ear Falls is entirely surrounded by Unorganized Kenora District. The closest community to Ear Falls is Wabauskang First Nation, followed by the unincorporated community of Perrault Falls. Etymology There are different versions of how the settlement was named after the eponymous falls. The following are three versions of the story found in the museum archives: # Ear Falls was once known as ''Otahwaka Powitek'' to the Ojibwa band. This area was believed to be haunted by the spirit of a giant beaver which lived between the upper and lower falls. It was said that when the beaver was swimming, its ears could be seen rising and falling in the foaming water. # Legends have produced t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Volt
The volt (symbol: V) is the unit of electric potential, electric potential difference (voltage), and electromotive force in the International System of Units (SI). It is named after the Italian physicist Alessandro Volta (1745–1827). Definition One volt is defined as the electric potential between two points of a conducting wire when an electric current of one ampere dissipates one watt of power between those points. Equivalently, it is the potential difference between two points that will impart one joule of energy per coulomb of charge that passes through it. It can be expressed in terms of SI base units ( m, kg, s, and A) as : \text = \frac = \frac = \frac. It can also be expressed as amperes times ohms (current times resistance, Ohm's law), webers per second (magnetic flux per time), watts per ampere (power per current), or joules per coulomb (energy per charge), which is also equivalent to electronvolts per elementary charge: : \text = \text\Omega = \fra ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Recovery (metallurgy)
Recovery is a process by which deformed grains can reduce their stored energy by the removal or rearrangement of defects in their crystal structure. These defects, primarily dislocations, are introduced by plastic deformation of the material and act to increase the yield strength of a material. Since recovery reduces the dislocation density the process is normally accompanied by a reduction in a material's strength and a simultaneous increase in the ductility. As a result, recovery may be considered beneficial or detrimental depending on the circumstances. Recovery is related to the similar process of recrystallization and grain growth, each of them being stages of annealing. Recovery competes with recrystallization, as both are driven by the stored energy, but is also thought to be a necessary prerequisite for the nucleation of recrystallized grains. It is so called because there is a recovery of the electrical conductivity due to a reduction in dislocations. This creates defect ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Drainage Basin
A drainage basin is an area of land where all flowing surface water converges to a single point, such as a river mouth, or flows into another body of water, such as a lake or ocean. A basin is separated from adjacent basins by a perimeter, the '' drainage divide'', made up of a succession of elevated features, such as ridges and hills. A basin may consist of smaller basins that merge at river confluences, forming a hierarchical pattern. Other terms for a drainage basin are catchment area, catchment basin, drainage area, river basin, water basin, and impluvium. In North America, they are commonly called a watershed, though in other English-speaking places, "watershed" is used only in its original sense, that of a drainage divide. In a closed drainage basin, or endorheic basin, the water converges to a single point inside the basin, known as a sink, which may be a permanent lake, a dry lake, or a point where surface water is lost underground. Drainage basins are simi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Marsh
A marsh is a wetland that is dominated by herbaceous rather than woody plant species.Keddy, P.A. 2010. Wetland Ecology: Principles and Conservation (2nd edition). Cambridge University Press, Cambridge, UK. 497 p Marshes can often be found at the edges of lakes and streams, where they form a transition between the aquatic and terrestrial ecosystems. They are often dominated by grasses, rushes or reeds. If woody plants are present they tend to be low-growing shrubs, and the marsh is sometimes called a carr. This form of vegetation is what differentiates marshes from other types of wetland such as swamps, which are dominated by trees, and mires, which are wetlands that have accumulated deposits of acidic peat. Marshes provide habitats for many kinds of invertebrates, fish, amphibians, waterfowl and aquatic mammals. This biological productivity means that marshes contain 0.1% of global sequestered terrestrial carbon. Moreover, they have an outsized influence on climate ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Polishing Pond
Facultative lagoons are a type of waste stabilization pond used for biological treatment of industrial and domestic wastewater. Sewage or organic waste from food or fiber processing may be catabolized in a system of constructed ponds where adequate space is available to provide an average waste retention time exceeding a month. A series of ponds prevents mixing of untreated waste with treated wastewater and allows better control of waste residence time for uniform treatment efficiency. Fundamentals First pond The facultative lagoon in the pond sequence functions like the primary clarifier of a conventional sewage treatment system. Heavy solids will settle to the bottom of the lagoon, and lighter solids will float. This facultative lagoon lacks the sludge removal capability of a primary clarifier, so a population of anaerobic organisms will colonize accumulated sludge on the bottom of the lagoon. The surface area of the lagoon should be large enough to provide an atmospheri ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tailings Pond
In mining, tailings are the materials left over after the process of separating the valuable fraction from the uneconomic fraction (gangue) of an ore. Tailings are different to overburden, which is the waste rock or other material that overlies an ore or mineral body and is displaced during mining without being processed. The extraction of minerals from ore can be done two ways: placer mining, which uses water and gravity to concentrate the valuable minerals, or hard rock mining, which pulverizes the rock containing the ore and then relies on chemical reactions to concentrate the sought-after material. In the latter, the extraction of minerals from ore requires comminution, i.e., grinding the ore into fine particles to facilitate extraction of the target element(s). Because of this comminution, tailings consist of a slurry of fine particles, ranging from the size of a grain of sand to a few micrometres. Mine tailings are usually produced from the mill in slurry form, which ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sulfur Dioxide
Sulfur dioxide (IUPAC-recommended spelling) or sulphur dioxide (traditional Commonwealth English) is the chemical compound with the formula . It is a toxic gas responsible for the odor of burnt matches. It is released naturally by volcanic activity and is produced as a by-product of copper extraction and the burning of sulfur- bearing fossil fuels. Structure and bonding SO2 is a bent molecule with ''C''2v symmetry point group. A valence bond theory approach considering just ''s'' and ''p'' orbitals would describe the bonding in terms of resonance between two resonance structures. The sulfur–oxygen bond has a bond order of 1.5. There is support for this simple approach that does not invoke ''d'' orbital participation. In terms of electron-counting formalism, the sulfur atom has an oxidation state of +4 and a formal charge of +1. Occurrence Sulfur dioxide is found on Earth and exists in very small concentrations and in the atmosphere at about 1 ppm. On other p ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
INCO
Vale Canada Limited (formerly Vale Inco, CVRD Inco and Inco Limited; for corporate branding purposes simply known as "Vale" and pronounced in English) is a wholly owned subsidiary of the Brazilian mining company Vale. Vale's nickel mining and metals division is headquartered in Toronto, Ontario, Canada. It produces nickel, copper, cobalt, platinum, rhodium, ruthenium, iridium, gold, and silver. Prior to being purchased by CVRD (now Vale) in 2006, Inco was the world's second largest producer of nickel, and the third largest mining company outside South Africa and Russia of platinum group metals. It was also a charter member of the 30-stock Dow Jones Industrial Average formed on October 1, 1928. Pre-Vale history Founding of Inco The company was founded following the discovery by blacksmith Tom Flanagan in Copper Cliff Ontario of chalcopyrite deposits, while the Canadian Pacific Railroad was being built. Initially, ore was shipped for smelting to a plant in Constable Hook, N ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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