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High-powered magnetic ball sets sold online at Walmart have been recalled after federal regulators warned about the potential risk of choking, injuries and death. ... Large Hematite Magnets ...
Hematine ring. Hematine (also magnetic hematite, hemalyke or hemalike) is an artificial magnetic material. [1] Hematine is widely used in jewelry. [citation needed]Although it is claimed by many that it is made from ground hematite or iron oxide mixed with a resin, analysis (of one object) has demonstrated it to be an entirely artificial compound, a barium-strontium ferrite.
The magnetic structure of α-hematite was the subject of considerable discussion and debate during the 1950s, as it appeared to be ferromagnetic with a Curie temperature of approximately 1,000 K (730 °C), but with an extremely small magnetic moment (0.002 Bohr magnetons). Adding to the surprise was a transition with a decrease in temperature ...
Fluidized bed magnetic roasting is the use of suspension roaster to fully mix and contact fine ore with reducing agents (such as pulverized coal, natural gas, etc.) in high temperature environment, so that the iron oxides in the ore (such as hematite, limonite, etc.) are reduced to magnetic iron minerals (mainly magnetite), thereby improving ...
Wooly Willy is a toy in which metal filings are moved about with a magnetic wand to add features to a cartoon face. [1] The toy was originally manufactured in Smethport, Pennsylvania and was launched on the toy market in 1955. It remains in production as of 2016. [2] Funny Face, Betty Brunette, and Dapper Dan were similar toys.
Magnext is a magnetic construction toy sold by MEGA Brands, consisting of plastic building pieces with embedded neodymium magnets, steel bearing balls, and a variety of additional parts which can be connected together to form anything from skeletal geometric shapes and structures to more robust and functional toys.
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