picagem e gordura
English translation: picking
| GLOSSARY ENTRY (DERIVED FROM QUESTION BELOW) | ||||||
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| 12:18 Jun 28, 2004 |
| Portuguese to English translations [PRO] Tech/Engineering - Mining & Minerals / Gems | |||||||
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|  Selected response from: Henrique Magalhaes Local time: 03:23 | ||||||
Grading comment
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| Summary of answers provided | ||||
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| 5 | Scraping [not scrapping] and greasing |
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| 4 | piercing/grease |
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| 3 +1 | picking and greasing |
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Answers
1 hr confidence: 
piercing/grease Explanation: Fico com o termo "piercing", segundo a definição: de pico ou do Célt. pic v. tr., ferir ou furar com objeto pontiagudo; abrir buracos em; dar picadas em; Isso seria o verbo "to pierce". |
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2 hrs confidence: peer agreement (net): +1
peer agreement (net): +1picking and greasing Explanation: For me this is the best version taking into account the real mining situation...of diamonds: choosing by means of a greasy substance. It's just a guess, but I would really think of it. |
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Grading comment
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5 hrs confidence:
Scraping [not scrapping] and greasing Explanation: Once a mining operation yields ore, the diamonds must be sorted from the other materials. This process relies primarily on diamond's high density. An old but effective method is to use a washing pan, which forces heavy minerals like diamond to the bottom and waste to the top. Cones and cyclones use swirling heavy fluids mixed with crushed ore to achieve density separations. With 99 percent of the waste in the ore removed, further separations may use either a grease table or an x-ray separator. Final separation and sorting is done by eye. Crushed ore is mixed with a muddy water suspension, called puddle, and all is stirred by angled rotating blades in the circular washing pan. Heavier minerals settle to the bottom and are pushed toward an exit point, while lighter waste rises to the top and overflows as a separate stream of material. A working grease table at Longlands, Cape Province, South Africa. The surface of diamond is highly unusual in that it resists being wetted by water but sticks readily to grease. Here, wet gravel washes across 3 inclined surfaces covered with beeswax and paraffin. Diamonds stick to the grease while wetted waste minerals flow past. The operator routinely scrapes the material that adheres to the table into a grease pot, using a trowel. The grease in the pot is melted and the diamonds are removed in a strainer. More automated systems use a rotating grease belt and scraper. Cuidado. você provalvelmente encontrou SCRAPING não scrapping..scrapping quer dizer jogar fora...scrape é limpar por arrastre...[?] -------------------------------------------------- Note added at 5 hrs 45 mins (2004-06-28 18:04:08 GMT) -------------------------------------------------- The left over material is scraped into a pot....scrape=raspar...a parte de cima da mesa [a superficie] é raspado para recolher o material de sobra |
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