What's the difference between coal and slag?

Coal


Definition:

  • (n.) A thoroughly charred, and extinguished or still ignited, fragment from wood or other combustible substance; charcoal.
  • (n.) A black, or brownish black, solid, combustible substance, dug from beds or veins in the earth to be used for fuel, and consisting, like charcoal, mainly of carbon, but more compact, and often affording, when heated, a large amount of volatile matter.
  • (v. t.) To burn to charcoal; to char.
  • (v. t.) To mark or delineate with charcoal.
  • (v. t.) To supply with coal; as, to coal a steamer.
  • (v. i.) To take in coal; as, the steamer coaled at Southampton.

Example Sentences:

  • (1) The biggest single source of air pollution is coal-fired power stations and China, with its large population and heavy reliance on coal power, provides $2.3tn of the annual subsidies.
  • (2) Photograph: AP Reasons for wavering • State relies on coal-fired electricity • Poor prospects for wind power • Conservative Democrat • Represents conservative district in conservative state and was elected on narrow margins Campaign support from fossil fuel interests in 2008 • $93,743 G K Butterfield (North Carolina) GK Butterfield, North Carolina.
  • (3) Nick Robins, head of the Climate Change Centre at HSBC, said: "If you think about low-carbon energy only in terms of carbon, then things look tough [in terms of not using coal].
  • (4) The fact that it is still used is regrettable yet unavoidable at present, but the average quantity is three times less than the mercury released into the atmosphere by burning the extra coal need to power equivalent incandescent bulbs.
  • (5) According to the International Energy Agency, 147m Indians will remain without electricity into 2030 under a business as usual scenario emphasising coal.
  • (6) My grandfather was a coal miner and Nana was rather plump and bossy.
  • (7) Shenhua Watermark Coal, a subsidiary of the Chinese state-owned Shenhua Group, is waiting for final approval from Hunt for a $1.2bn open-cut coalmine on the edge of the plains, a little more than three kilometres from Hamparsum’s property.
  • (8) Instead the textbook simply reads: "Traditional industries, such as shipbuilding and coal mining, declined ... during her premiership, there were a number of important economic reforms within the UK".
  • (9) In the US, electricity accounts for 39% of emissions – and 75% of that is contributed by coal.
  • (10) A survey was conducted in southern Illinois with a population of 46 coal miners and ex-coal miners ranging in age from 42 to 86 years.
  • (11) Australia’s greatest contribution to global warming is through our coal, exported and burned in foreign power stations.
  • (12) By its calorific value the mycelial waste is equal to brown coal or peat.
  • (13) The DECC believes clusters of coal and gas plants with CCS would offer efficiency because they could share the costs of building and operating pipelines to storage facilities, probably in old North Sea oil and gas fields.
  • (14) Its few remaining mines involve people digging coal out of hillsides.
  • (15) That stake in eight Indonesian coal mines represents 1GT of future carbon dioxide emissions, more than Germany’s annual output.
  • (16) This brings lads like 12-year-old Matthew Mason down from the magnificent studio his father Mark, from a coal-mining town ravaged by pit closures, lovingly built him in the back garden at Gants Hill, north-east London.
  • (17) This in turn meant frantic investment in German coal and lignite – 10 new plants are said to be opening – and a surge in Polish coal output.
  • (18) "It would be ridiculous to encourage shale gas when in reality its greenhouse gas footprint could be as bad as or worse than coal.
  • (19) We conclude that there appears to be no benefit from exceeding a concentration of 5% crude coal tar in yellow soft paraffin in the treatment of patients with psoriasis and that the plateau in the dose-response curve for the action of crude coal tar in psoriasis begins at a point between 1 and 5%.
  • (20) Engie, the owner of Rugeley coal-fired station in Staffordshire, which made the most recent closure announcement earlier this month, blamed low wholesale power prices as much as carbon taxes for its decision .

Slag


Definition:

  • (v. t.) The dross, or recrement, of a metal; also, vitrified cinders.
  • (v. t.) The scoria of a volcano.

Example Sentences:

  • (1) I don't want to go on slagging groups like U2 or Simple Minds that aren't worth the words.
  • (2) In the Netherlands both Portland cement and blast furnace cement (slags from blast furnaces with about 30% Portland cement) are used for concrete.
  • (3) Meanwhile the Police Federation's attempts to extract retribution for the disputed p-word, in the form of Andrew Mitchell's sacking, have been roundly slagged off by former Labour minister Chris Mullin , who last week described the organisation as "a bully", "a bunch of headbangers" and "a mighty vested interest that has seen off just about all attempts to reform the least reformed part of the public service".
  • (4) As Miliband prepared to deliver his speech, whose contents were trailed over the weekend in an interview with the Mail on Sunday , Boris Johnson, the Conservative mayor of London, rounded on politicians who are "slagging off" a sector that is "crucial to the British economy".
  • (5) Mineral wool insulation, which is made from Tennessee phosphate slag, and commonly used insulation, which is made from blast furnace slag, had similar concentrations of these radionuclides.
  • (6) Quantities of land-disposed or stored residuals, including slags, sludges, and dusts, are given per unit of metal production for most primary and secondary metal smelting and refining industries.
  • (7) However, this hazard is not associated with any index of exposure to slag wool itself.
  • (8) Relatively thick rock and ceramic fibres (median greater than 1 micron) induced tumours, but slag and wollastonite fibres did not, probably because of their better solubility.
  • (9) The radioactivity levels of coal ash and slag in Hong Kong are about the average values in other countries.
  • (10) The US president might be all mouth in slagging off the Russians behind their backs, but Vlad was confident he was no trousers face to face.
  • (11) Long-term inhalation studies using several animal species and dust preparations of fibrous glass, rock wool or slag wool have produced little evidence of pulmonary fibrosis or pulmonary tumors.
  • (12) Mr Cameron can hardly slag off Mr Clegg as "not fit for government" when they will have spent five years sitting in the same cabinet.
  • (13) Who cares?” tweeted former congressman Anthony Weiner, and slagged off Philadelphia as a “2nd tier city”: Anthony Weiner (@anthonyweiner) Honestly, who cares?
  • (14) Concrete blocks made with phosphate slag had enhanced 226Ra and 228Ra contents when compared to ordinary concrete block.
  • (15) The present study is concerned with the pulmonary pathological changes in the rats following intra-tracheal administration of sintering dust and vanadium slag separately.
  • (16) Now I'd love to stay and chat all night, but unfortunately I have to correct all the typos in this report, insert gags where appropriate and remove all the bits where I slagged off Steven Gerrard, who is about to lift the Champions League trophy for Liverpool.
  • (17) Something sticks in the throat about having the word “lad” associated with a rapist, or an abuser, or even someone who might see fit to call me a slag.
  • (18) 2.09pm GMT In an unusual turn of fate, the front-page headline in today’s Bild is basically “Guardian live blogger slags off German Olympic uniform”.
  • (19) I have lost count of the number of times I have been called a slag for refusing to accept a man's advances or to respond to street harassment.
  • (20) This is a band that doesn't want to be slagging off the biggest pop station in the country.