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.
More or less of other metals alloyed with your gold such as silver or copper may raise or lower the melting point a bit. 14 K Gold, varies because there are many 14 K gold alloys, but a typical melting temperature for 14 K is about 1650 F. A fairly powerful torch, such as an oxy-acetylene unit will be required.