Sustainable Mining and Metallurgy

The purpose of this paper is to explore the feasibility and treatment effect of the process of wet pretreatment and rotary hearth furnace collaborative treatment of sintering ash. Through the analysis of the physical and chemical properties of sintering machine head ash, the process flow of washing-rotary hearth furnace collaborative treatment was designed. The effectiveness of “wet pretreatment process” to remove harmful elements and rotary hearth furnace treatment was analyzed, and its influence on the original washing system and rotary hearth furnace system was studied. The results show that the average content of Cl, K2O, Na2O and water in the iron-rich material after washing treatment is 1. 80% , 0. 75% , 0. 7% and 18. 55% , respectively. The average removal rates of Cl, K and Na are 93. 13% , 96. 02% and 83. 10% , respectively, which basically eliminates the negative effect of high chlorine load on the rotary hearth furnace. The main products and operation data of the washing workshop and rotary hearth furnace are not affected compared with the previous ones, and meet the requirements of various standards. The “water washing pretreatment + rotary hearth furnace process” synergistic treatment of sintering ash process is a feasible method, which has good treatment effect and environmental protection benefits.