| 单词 | red mud |
| 释义 | > as lemmasred mud red mud n. (a) Geology a mud of terrestrial origin, found on continental shelves and in other shallow waters, and coloured red by iron oxides; (b) a residue from the extraction of alumina from bauxite, coloured red by iron impurities. ΘΚΠ the world > the earth > structure of the earth > constituent materials > sediment or alluvium > [noun] > other marine red mud1690 blue mud1773 ooze1876 society > occupation and work > materials > derived or manufactured material > materials produced from metalworking > [noun] > slag or scoria > of specific metals lead-ashes1515 quittor1671 bottom1852 buckshot-cinder1881 lead-ash1882 red mud1936 1690 R. Boyle Medicina hydrostatica 201 One of the best sorts of Swedish Iron..is divers times found, in the Form of a red Mud, at the bottom of Lakes, or far lesser Stagnant Waters. 1773 R. Bishop East India Navigator's Daily Assistant 105 The Monopin-hill bore NW in twelve fathom, red mud. 1845 Littell's Living Age 30 Aug. 401 The tide rises and falls 60 or 70 feet, leaving extensive surfaces of red mud. 1926 Jrnl. Geol. (Chicago) 34 140 The red muds which Murray found in such quantities in the Atlantic Ocean off the mouth of the Amazon River. 1936 Metals Handbk. (Amer. Soc. Metals) 902 The Bayer process... The bauxite is digested with caustic soda solution under pressure and the alumina dissolved out as a solution of sodium aluminate. The residue, known as red mud, contains the oxides of iron, silicon, and titanium [etc.]. 1995 Sci. of Total Environment 175 199/1 Bauxitic red mud from an alumina processing plant is discharged through a pipe-line..into Antikyra Bay. 2005 P. E. Potter et al. Mud & Mudstones iv. 70/2 Regardless of their origin, red muds and mudstones appear to require at least 2% total Fe and 1.5% hematite. < as lemmas |
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