This is a record of material that was recently featured on the Main Page as part of Did you know (DYK). Recently created new articles, greatly expanded former stub articles and recently promoted good articles are eligible; you can submit them for consideration.. Archives are generally grouped by month of Main Page appearance.

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A dispersed mixture of Al and CaO was prepared through a planetary ball milling process. Granular particles of metallic Al and dried CaO (previously dried at 850 °C for 2 h) were introduced into the planetary ball mill (QM-3SP2; 200 g of stainless steel balls; diameter 1.2–30 mm) at a weight ratio (Al:CaO) of 1:2.

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1 Population balance model approach to ball mill optimization in iron ore grinding Patricia M. C. Faria1,2, Lu s Marcelo Tavares2 and Raj K. Rajamani3 1. Vale S.A., Brazil 2. Department of ...

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This is a record of material that was recently featured on the Main Page as part of Did you know (DYK). Recently created new articles, greatly expanded former stub articles and recently promoted good articles are eligible; you can submit them for consideration.. Archives are generally grouped by month of Main Page appearance.

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Vale brings to Brazil 5 million test kits in humanitarian aid to fight the new coronavirus; Mining By Women: Vale is made by young female talents as well. Vale announces the sale of its coal assets. Vale and wheaton precious metals donate $100,000 to edgar burton Christmas food drive. Vale launches new edition of the Reparation Report

N. Korea's parliamentary session. This photo, released by North Korea's official Korean Central News Agency on Sept. 30, 2021, shows Kim Yo-jong, North Korean leader Kim Jong-un's sister and currently vice department director of the ruling Workers' Party's Central Committee, who was elected as a member of the State Affairs Commission, the country's …

The paper demonstrates the application of this methodology to optimize solids concentration in ball milling of an iron ore from Brazil. The wet grinding experiments were conducted in bench (0.25 m diameter) and pilot-scale mills (0.42 m diameter), and surveys in a full-scale industrial (5.2 m diameter) mill.

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Commodore James Barron, born 15 September 1768 in Hampton, Virginia, died 21 April 1851 in Norfolk, served under his father, Commodore James Barron the Elder, in the Revolutionary War. He was made Captain in the Virginia Navy in 1799 and transferred to the newly formed U.S. Navy in 1803.

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Tai′an City Taishan Steel Ball Factory was established in 1998. Tai′an City Taishan Steel Ball Factory is a professional manufacturer engaged in production, sales and service of various grinding balls.

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The offer was renewed in 1775, and was claimed in 1777 by a French military engineer, Charles Augustin Coulomb [Gillmor, 1971;p. 59 in Shamos, 1959]. Fig. 5 Coulomb's torsion balance Coulomb's instrument, known as the "torsion balance," served as model for magnetic instruments over nearly two centuries.