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| Roasting process | Belt roasting machine method | Grate-rotary kiln method | The whole furnace |
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| Main characteristics | (1) Easy to operate, manage, and maintain | (1) Simple equipment structure | (1) Simple equipment structure |
| (2) Can handle all kinds of ore | (2) Even roasting, high yield, and good quality | (2) No special requirements for the whole furnace equipment material |
| (3) The calcining cycle is shorter than the shaft furnace method, and the length of each section is easy to control | (3) It can handle all kinds of ore and produce self-fusible pellets | (3) Good use of heat inside the furnace |
| (4) Can handle the raw material which is easy to loop | (4) High-temperature resistant alloy steel is not used in rotary kiln and low alloy steel is used in grate | (4) uneven roasting |
| (5) Uneven mass of upper and lower pellets | (5) Rotary kiln easy to produce “ring” | (5) Single capacity is small |
| (6) High-temperature resistant alloy steel is needed for trolley and grate | (6) If the cooling effect of ring cooling machine is not good, it is not suitable for “ring” materials | (6) Poor adaptability of raw materials, mainly used for magnetite |
| Quality of products | Good | Well | Poor |
| Infrastructure investment | Medium | Good | Poor |
| Operating expenses | Slightly high | Low | Ordinary |
| Power consumption | Slightly high | Low | High |
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