IRONORE/ Sector giants BHP Group BHP.AX, Rio Tinto RIO.AX climbed 3.1% and 2.5%, respectively. May 18 (Reuters) - Australian shares rose for a fourth straight session on Wednesday, lifted by mining and technology stocks, while miner Fortescue Metals jumped after it announced the return of its founder Andrew Forrest to oversee the iron ore business. GLOB/MKTS.N Nevertheless, U.S. Federal Reserve Chair Jerome Powell said that interest rates would be hiked as much as required to combat surging inflation, a trend other geographies are expected to follow.