BY DEBORAH A Troy-based diecasting business burned Wednesday, causing an estimated loss of at least $3 million, Troy Fire Chief Justin Jackson said. A fire was called in at about 3:33 a.m. at Anderton Castings, 222 Lely Drive, and the first Troy Volunteer Fire Department firefighters found flames coming through the roof, Jackson said. Employees were still evacuating from the structure when crews arrived,…