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In the last 15 years Minermet Group has opened up a new Division for Anthracite, Coal and Coke which is expanding very much, for markets in Europe, Russia, Middle East, Pakistan, India, Vietnam, Australia and Indonesia.
Coal (from the Old English term col, which has meant "mineral of fossilized carbon" since the 13th century)is a combustible black or brownish-black sedimentary rock usually occurring in rock strata in layers or veins called coal beds or coal seams. The harder forms, such as anthracite coal, can be regarded as metamorphic rock because of later exposure to elevated temperature and pressure. Coal is composed primarily of carbon along with variable quantities of other elements, chiefly hydrogen, sulfur, oxygen, and nitrogen.
Throughout history, coal has been used as an energy resource, primarily burned for the production of electricity and/or heat, and is also used for industrial purposes, such as refining metals. A fossil fuel, coal forms when dead plant matter is converted into peat, which in turn is converted into lignite, then sub-bituminous coal, after that bituminous coal, and lastly anthracite. This involves biological and geological processes that take place over a long period. The Energy Information Administration estimates coal reserves at 948×109 short tons (860 Gt).One estimate for resources is 18 000 Gt.
Coal is the largest source of energy for the generation of electricity worldwide, as well as one of the largest worldwide anthropogenic sources of carbon dioxide releases. In 1999, world gross carbon dioxide emissions from coal usage were 8,666 million tonnes of carbon dioxide.In 2011, world gross emissions from coal usage were 14,416 million tonnes.Coal-fired electric power generation emits around 2,000 pounds of carbon dioxide for every megawatt-hour generated, which is almost double the approximately 1100 pounds of carbon dioxide released by a natural gas-fired electric plant per megawatt-hour generated. Because of this higher carbon efficiency of natural gas generation, as the market in the United States has changed to reduce coal and increase natural gas generation, carbon dioxide emissions have fallen. Those measured in the first quarter of 2012 were the lowest of any recorded for the first quarter of any year since 1992.In 2013, the head of the UN climate agency advised that most of the world's coal reserves should be left in the ground to avoid catastrophic global warming.
Coal is extracted from the ground by coal mining, either underground by shaft mining, or at ground level by open pit mining extraction. Since 1983 the world top coal producer has been China.In 2011 China produced 3,520 million tonnes of coal – 49.5% of 7,695 million tonnes world coal production. In 2011 other large producers were United States (993 million tonnes), India (589), European Union (576) and Australia (416).[9] In 2010 the largest exporters were Australia with 328 million tonnes (27.1% of world coal export) and Indonesia with 316 million tonnes (26.1%),while the largest importers were Japan with 207 million tonnes (17.5% of world coal import), China with 195 million tonnes (16.6%) and South Korea with 126 million tonnes (10.7%).
- Q:I have forty cm long, width of twenty, high grade of fourteen rectangular fish tank. Three ten cm koi. Every day at noon to feed a few grains of rice, the next day a small amount of feces removed with the net, there is no impurities in the water. But a few days there is fog water. Water is also used for precipitation, but the fish is not very lively. I didn't buy the filter. Would you say that the charcoal is a common wood burned after the formation of charcoal? How can I use to filter the water? Bamboo charcoal in the aquarium to sell it? How much is it?
- Activated carbon has a strong physical adsorption and chemical adsorption ", can be certain organic compounds adsorption removal effect by using this principle, we can quickly and effectively remove harmful substances, the aquarium water odor and pigment and so on, so the water quality directly and rapidly improve.
- Q:How much electricity can a kilogram of standard coal produce?
- This can be calculated in theory (that is, the case of complete conversion of energy) a kilogram of standard coal can be sent to the number of electricity.
- Q:I was a major in geological engineering, in the practice of mineral petrology, the teacher asked, "the mineral composition of coal?" Is a mineral petrology, coal chemistry is not in, please master, senior students. Thank you
- The composition of coal is mainly composed of organic matter, which is mainly composed of carbon, hydrogen, oxygen, nitrogen and other elements. There are ten kinds of elements in coal, but the elements of coal are usually composed of five elements, namely carbon, hydrogen, oxygen, nitrogen and sulfur. In coal, the content is very small, a large variety of other elements, generally not as the composition of the elements of coal, but only as an element or trace elements in coal.
- Q:What is the use of activated carbon
- Activated carbon is a kind of purification material, adsorbent, catalyst
- Q:Advantages and disadvantages of coalSuch as the titleThe advantages and disadvantages of LPG also help to say it
- There is a growing shortage of resources and a lack of adequate combustion
- Q:What is lean coal, lean coal classification
- Coal: coal soot level top coal, it is characterized by a higher ignition temperature (350 - 360 DEG C), high calorific value, weak bond or not. Coal is mainly used for power generation and power plant boiler fuel. The use of coal, and the other with the use of high volatile coal does not lose for a a good way.
- Q:The principle and function of economizer recycle?
- The water in the economizer is raised into the drum due to the small heating density, and the water in the drum can be continuously added to the economizer through the recycle pipe, thus forming a natural circulation.
- Q:What is the difference between carbon and carbon materialsJust out of work, do activated carbon, carbon materials and carbon materials often see, I do not know what the difference, trouble you!
- Carbon is an element. Carbon material usually refers to the material containing carbon and the main body
- Q:What is the difference between bamboo charcoal and carbon
- Bamboo charcoal has a similar function with the long carbon preparation, but its efficacy and differences have similarities and differences, can not replace the senior carbon
- Q:What is the structure of activated carbon?
- Activated carbon is a black powder or granular amorphous carbon. The main components of activated carbon in addition to carbon and oxygen, hydrogen and other elements. Because of the irregular arrangement of the activated carbon on the structure, there are pores in the cross connection, and the carbon tissue defects will occur in the activation. Therefore, it is a kind of porous carbon, which has low bulk density and large specific surface area.
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ANTHRACITE
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