Formation mechanism of Fe-Mo master alloy by aluminothermic reduction of MoS2-Fe2O3 in the presence of lime

Abstract

The reaction mechanism of MoS 2-Fe 2 O 3 aluminothermic reduction in the presence of lime using microwave-assisted combustion synthesis method was surveyed. Achieving technical feasibility in one-step production of ferromolybdenum along with sulfur removing in solid form are the main features of this novel process. Simultaneous Preliminary thermoanalytical investigations DSC/TGA and X-ray diffraction experiments during the heating process of 0.42MoS 2 +1.14Al + 0.29Fe 2 O 3 +0.84CaO demonstrated four key sequential endothermic and exothermic reactions at 420, 540, 660, and 810 o C. The most noteworthy reactions involve evaporation of moisture and volatile matter, molybdenite roasting, simultaneous production of lateral compounds such as CaMoO 4 and CaSO 4 , aluminum melting transition, and final termite reaction. Kinetics procedure of the system was conducted using a classical model-free approach by Kissinger-Akahira-Sunose (KAS) method. In this study, the activation energy was determined about 106.4 (kJ.mol-1) for thermite reaction in the temperature range of 810 to 918 o C.

An investigation on aluminothermic reduction of MoO3 in domestic microwave oven

“…Molybdenite (MoS2) is the major source for production of molybdenum and its compounds [1]. There are several ways for extraction of molybdenum from its mineral source.…”