| abstract |
[PROBLEMS] To efficiently recover valuable elements contained in exhaust gas and reuse them as resources when various wastes are effectively used as cement raw materials or thermal energy sources in a cement firing plant. A recovery method and a recovery system for valuable elements in a cement firing plant. A method for recovering valuable elements in a cement firing plant comprising a kiln (1) for firing a cement material and a preheater (3) for preheating the cement material with exhaust gas discharged from the kiln (1), The exhaust gas in a temperature range of 200 ° C. to 800 ° C. is extracted, and one or more valuable elements of lead, thallium, arsenic, cadmium, zinc, mercury and bromine are recovered from the exhaust gas. [Selection] Figure 1 |