Abstract: Analytic Hierarchy Process( AHP) was used widely in decision analysis. This paper aimed to demonstrate it's validity of decision-making and evaluation in ore dressing, further, it's feasibility in the decision-making of process was discussed. Low grade carbonate-type manganese ' s processing from Guangxi was used as sample. The evaluation, based on the original data,compared five different schemes of ore dressing, and evaluated three aspects ( concentration grade, recovery and yield) , on the basis of AHP, through generalized evaluation method, subsequently, weight parameters were given by experts, then the factors' weights were analyzed. The result of single ordering and total ordering are satisfactory in consistency. The index of concentration grade was considered firstly, combined magnetic separation and reverse-flotation method was the best process of ore dressing. The results were matched well with the original results. Therefore, the AHP could effectively evaluate the decision-making of process in dressing plant.

Key words: analytic hierarchy process(AHP);decision;economic;mineral processing