6Abdel-Zaher, Abouzeid M. Physical and thermal treatment of phosphate ore-an overview[J].Int J Miner Process, 2008, 85 (3) :59-84.
7Alfredw Petersen.Process for treating phosphate ore:US,3717702 [P].1971-02-21.
8Friedfich Wolstein, Essen.Method for the conversion of phosphate rock containing magnesium into phosphoric acid and a mixture of magnesium and calcium carbonates:US,4152379 [P].1978-11-12.
10Abu-Eishah, EI-Jallad, TouqanM. Beneficiation of calcareous phosphate rocks using dilute acetic acid solution: optimization of operating conditions for Ruseifa phosphate [J].International of Journal Mineral Processing, 1991(31 ) : 115-126.