How to Use alumina in a Sentence

alumina

noun

• The factory would mix the ore with chemicals and heat it to separate alumina from the ore — the first step in producing raw aluminum.
  — Keith Bradsher and Ailin Tang, New York Times, 13 Mar. 2018
• In the smelting process, the raw material, alumina, is poured into large pots, bathed in caustic chemicals and fried with heavy electric current.
  — Paul Roberts, The Seattle Times, 26 Aug. 2017
• Below that sits an alumina-zircon-silica nozzle, which can programmed to make the same intricate moves in X-, Y-, and Z-space familiar to anyone who has seen a 3D printer in action.
  — Jake Swearingen, Popular Mechanics, 21 Aug. 2015
• Guinea is a hotbed of mining activity in recent months as aluminum firms from the U.S., China and Russia, try to carve out a piece of its massive bauxite-ore deposits used to produce alumina and aluminum.
  — Costas Paris, WSJ, 2 Nov. 2018
• Rusal had provided 7 percent of the world’s alumina, the raw material for aluminum production.
  — Eric Levitz, Daily Intelligencer, 23 Apr. 2018
• The practice is common in aluminum production, where the smelting process uses vast amounts of electricity to create aluminum metal from alumina.
  — Megan Geuss, Ars Technica, 16 Mar. 2018
• Many of the most common technologies -- such as reverse osmosis, deionization and activated alumina -- cost in the hundreds of dollars.
  — OregonLive.com, 14 Dec. 2017
• Bloomberg News reported that Rusal officials met Chinese companies and traders this week to discuss the possibility of buying alumina and selling aluminum in the Asian country.
  — David Hodari, WSJ, 20 Apr. 2018
• Raw materials including coke, which helps to fuel iron-ore smelters, and caustic soda, used to extract alumina from bauxite, are also rocketing higher in price.
  — Rhiannon Hoyle, WSJ, 12 Mar. 2018
• Bauxite is a clay rock that is refined to produce aluminum hydroxide, or alumina, which is then smelted to produce primary aluminum (secondary aluminum comes from recycled scrap).
  — Greg Ip, WSJ, 9 Mar. 2018
• Sales slightly exceeded expectations amid rising prices for aluminum and the feedstock alumina.
  — Bob Tita, WSJ, 24 Jan. 2017
• Authorities in Brazil ordered a huge alumina producer to operate at half capacity after a spill.
  — Peter Eavis, New York Times, 10 July 2019
• But by sealing the alumina cement compound along with titanium inside a glass tube and heating it to 1,100 degrees Celsius, the researchers were able to create a homogenized, symmetrical cage structure that conducts electricity like metal.
  — Rob Beschizza, WIRED, 12 Apr. 2007
• Such proposals often involve sulfates, particles that form in the stratosphere from sulfur dioxide ejected by volcanoes, or other molecules with high reflectivity, such as diamond dust or alumina (aluminum oxide).
  — Paul Voosen, Science | AAAS, 21 Mar. 2018
• Aluminum rose as China’s top state smelter suspends production capacity of intermediate material alumina.
  — Brian Chappatta, Bloomberg.com, 11 May 2017

Last Updated: 18 Oct 2024