Method for producing portland cement clinker using domestic waste incineration residue

The invention discloses a method for producing Portland cement clinker with incineration slag of municipal solid waste. The method is to mount a by-way air exhaust device on the prior novel cement kiln so as to solve the problem of crust and blockage caused by chlorine brought into the kiln by the slag. For a kiln system with a kiln row and a furnace row which are independent from each other, the by-way air exhaust device is arranged in an uptake of a kiln end gas chamber in the kiln row close to a five-stage cylinder; while for common industrial kiln, the air exhaust device is arranged between an outlet of decomposing furnace and an inlet of the five-stage cylinder or arranged at an uptake of an outlet of the five-stage cylinder. The use frequency of the by-way air exhaust device is between once per eight hours and once per three days, the temperature of the air entering the by-way air exhaust device is controlled to be more than 950 DEG C. The method is simple in process, low in treatment cost, and complete in toxicity removal due to the fact that heavy metals in the slag are solidified in the Portland cement clinker and are solidified in hydrates during the hydration of the mineral compositions of the Portland cement clinker. The method contributes to the development of cyclic economy and reduces the consumption of natural resources and energy of the cement industry.