Extract

Extract: Encyclopedia II - Copper extraction - Hydrometallurgical Extraction

Copper extraction - Oxide ores. Oxide ores are readily leached by sulfuric acid, usually using a heap leach or dump leach process in combination with solvent extraction and electrowinning technology (SX-EW). Commonly sulfuric acid is used as a leach for copper oxide, although it is possible to use water. There have been examples where froth flotation was used to concentrate malachite. In general froth flotation is not used to concentrate copper oxide ores, as the cost of leaching is cheap when compared to the cost of grinding and flotation. The implication of this is th ...

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Copper extraction - Mining

Copper extraction - Hydrometallurgical Extraction

Copper extraction - Pyrometallurgical Extraction

Extract: Encyclopedia - Canola

In agriculture, Canola is a trademarked cultivar of the rapeseed plant from which rapeseed oil is obtained. It was initially bred in Canada by Keith Downey and Baldur Stefansson in the 1970s. Canola Oil is a term coined from the words "Canadian" and "oil". The ancestor of Canola is a plant called rapeseed. In ancient times, rapeseed oil was used in Asia and Europe in lamps, for cooking, and in foods. Today, its seed contain a highly desirable oil used in shortening, salad oil, cooking sprays, and many other ...

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Canola - Canola oil extraction

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Extract: Encyclopedia - Bovril

Bovril, formerly a beef extract, now is the trademarked name of a thick, salty yeast extract, sold in a distinctive, bulbous jar. A spoonful of the semi-liquid paste in hot water makes a savoury drink, but few like it because of its raucous flavour. It can also be used as a flavouring for soups, stews or porridge, or spread on bread, especially toast. The name, like many late 19th and early 20th century tradenames, comes (partially) from Latin, bos meaning "ox." The vril component of the name comes from Bul ...

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Extract: Encyclopedia - Big Lie

The phrase Big Lie refers to a propaganda technique which originated with Adolf Hitler's 1925 autobiography Mein Kampf. In that book Hitler wrote that people came to believe that Germany lost World War I in the field due to a propaganda technique used by Jews who were influential in the German press. This technique, he believed, consisted of telling a lie so "colossal" that no one would believe anyone "could have the impudence to distort the truth so infamously". The first documented use of the phrase "big lie" is in the corresponding passage: "in the big lie ther ...

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Extract: Encyclopedia - Wisdom teeth

Wisdom teeth are third molars that usually appear between the ages of 18 and 20 (although they may appear when older, or fail to appear at all). They are called "wisdom teeth" because they appear so late—much later than the other teeth, at an age where people are supposedly wiser than as a child, when the other teeth erupt. Often they need to be removed when they impact against other teeth—colloquially known as "coming in sideways". Wisdom teeth are sometimes described as an example of a "vestigial" trait. Some argue that r ...

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Extract: Encyclopedia - Enfleurage

Enfleurage is a process that uses odorless fats that are solid at room temperature to capture the fragrant compounds exuded by plants. The process can be "cold" enfleurage or "hot" enfleurage. Enfleurage - The process of enfleurage. In cold enfleurage, a large framed plate of glass, called a chassis, is smeared with a layer of animal fat, usually from pork or beef, and allowed to set. Botanical matter, usually petals or whole flowers, is then placed on the fat and its scent is allowed to diff ...

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Extract: Encyclopedia - Curare

Curare is a substance containing the alkaloid D-tubocurarine. It is obtained from one of several plants, the purified products of which are used as skeletal muscle relaxants. Curare has been superseded by a number of curare-like agents that have a similar pharmacodynamic profile but with fewer side effects. Curare is an example of a non-depolarising muscle relaxant which blocks the acetylcholine receptors on the post syn ...

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Extract: Encyclopedia - Wh-movement

Wh-movement or wh-fronting is a syntactic phenomenon whereby interrogative words (sometimes called wh-words) appear at the beginning of an interrogative sentence. The term wh-movement is due to the fact that most English interrogative words start with wh-, for example, what, where, why, etc. The term wh-movement is applied universally, even when the interrogative words of a given langu ...

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Wh-movement - Links

Extract: Encyclopedia - Coal mining

Coal mining is the extraction of coal from the Earth for use as fuel. Coal mining - Methods of extraction. The most economical of methods of coal extraction from coal seams depends on the depth and quality of the seams, and also the geology and environmental factors of the area being mined. If the coal seams are near the surface, the coal is extracted by strip mining. Strip mining exposes the coal by the advancement of an open pit or strip. As the coal is exposed and extracted, the overburden from th ...

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Extract: Encyclopedia - Vitriol

Vitriol is the name that alchemists gave to sulfuric acid. The name was also used for various sulfate salts, such as copper(II) sulfate (blue vitriol, or rarely Roman vitriol), zinc sulfate (white vitriol), iron(II) sulfate (green vitriol), iron(III) sulfate (vitriol of Mars), or cobalt(II) sulfate (red vitriol). Oil of vitriol is concentrated sulfuric acid so named due to its oily appearance. Vitriol is also a quality of abusive or malicious forms of speech or feelings. Vitriol - ExtractionIncluding:

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Extract: Encyclopedia II - Copper extraction - Pyrometallurgical extraction

The following is a process of copper extraction from chalcopyrite ore into pure metal. While oxide ores can be processed using Pyrometallurgical techniques, Hydrometallurgical methods are more cost effective. The copper ore is crushed and ground before it is concentrated to between 20 and 40% copper in a flotation process. The next major step in production uses pyrometallurgical processes to convert the copper concentrate to 99% pure copper suitable for electrochemical refining. These high temperature processes first roast the ...

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Extract: Encyclopedia - Iron

Iron is a chemical element with the symbol Fe (L.: Ferrum) and atomic number 26. Iron is a group 8 and period 4 metal. Iron is notable for being the final element produced by stellar nucleosynthesis, and thus the heaviest element which does not require a supernova or similarly cataclysmic event for its formation. It is therefore the most abundant heavy metal in the universe. Iron - Notable characteristics. Iron is the most abundant metal on Earth, and is believed to be the tenth most abundant element ...

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Extract: Encyclopedia II - Copper extraction - Mining

To a large extent, copper oxide and sulfides are naturally separated in nature. As such, once mined the processing of the ore generally does not need to separate the oxides and sulfides. Copper extraction - Primary orebody formation. Copper orebodies are formed when geothermal solutions bring copper dissolved from deep underground to cool near surface environments where the copper and associated metals precipitate as minerals in veins and disseminations within the rock. Copper is usually deposited as copper sulfide minerals or ...

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