This chapter concentrates on the basic raw materials used in iron ore sintering and their handling for sinter mix, which is important for the generation of sound sinter. This is the chapter that discusses the types of raw materials which are utilized in sinter plants such as iron ore fines fluxes and additives. It explains the purpose of each constituent in the sintering process e.g. what role fluxes play in the melting of the iron ore particles and how additives help to enhance the sinter quality and efficiency. The authors dealt with the characteristics and properties of these raw materials such as their chemical composition, size distribution, and the way they react with one another under sintering conditions to appreciate their influence on the final product. The chapter also identifies the importance of each ingredient in the composition of the sinter mix and how it affects properties like sintering performance, sinter strength, and the efficiency of the blast furnace. Last but not least, these factors would include methods of optimizing the composition of the sinter mix, such as optimizing the material ratios, choosing the right additives, and controlling them, so that the sinter as a product would meet quality and efficiency requirements. The information contained in this chapter is the basis for the comprehension of the significance of raw materials and their blend in the success of the sintering process.