Sandborn is a town in Vigo Township, Knox County, Indiana, United States. The population was 415 at the 2010 census. It is the home of the annual Black Creek Festival. Its only business is AKB oil, once known as the Blue Jay Junction.
Large furnaces melt the iron and stay at temperatures ranging 2,600 to 2,800 degrees Fahrenheit. Computerized systems constantly monitor temperature. As the iron travels down the molding line, the temperature gradually decreases from about 2,600 to 1,200 degrees. As the castings cool, they enter a shakeout process in which the molds are shaken off and the sand is recycled for reuse. When castings get below about 140 degrees, they are cleaned and finished.
A team of scientists has measured the melting point of iron at high precision in a laboratory, and then drew from that result to calculate the temperature at the boundary of Earth's inner and outer core â now estimated at 6,000 C (about 10,800 F). That's as hot as the surface of the sun.The difference in temperature matters, because this explains how the Earth generates its magnetic field. The Earth has a solid inner core surrounded by a liquid outer core, which, in turn, has the solid, but flowing, mantle above it.There needs to be a 2,700-degree F (1,500 C) difference between the inner core and the mantle to spur thermal movements that â along with Earth's spin â create the magnetic field.The previously measured core temperature didn't demonstrate enough of a differential, puzzling researchers for two decades.arth's internal engine is running about 1,000 degrees Celsius (about 1,800 degrees Fahrenheit) hotter than previously measured, providing a better explanation for how the planet generates a magnetic field, a new study has found.