A 
sintering flue gas reduction and 
waste heat comprehensive utilization process is composed of 
flue gas circulating 
sintering, sinter vertical cooling, circulating 
air cooling, 
waste heat power generation and the like. The process comprises the following specific steps that part of 
sintering flue gas is guided out from a sintering trolley head and 
tail bellows branch pipes, and after dedusting and boosting, the 
flue gas is circulated to the surface of a middle material layer of a sintering trolley; sintering 
waste gas in the middle of the sintering 
machine trolley is guided out and subjected to dedusting and purification, most of the purified 
waste gas is emitted, and a small amount of 
waste gas takes participation in high-temperature sinter vertical cooling; the sinter at the 
tail end of the sintering trolley is crushed and then enters a vertical cooling furnace, 
counter flow cooling is conducted on the crushed sinter and circulating air blown from the bottom, and the sinter is discharged; the circulating 
cold air enters a 
waste heat power generation system after being subjected to heat exchange and primary dedusting; and the circulating air flowing through the waste 
heat power generation 
system is subjected to secondary dedusting and is mixed with part of purified sintering waste gas, boosting is conducted, and then the 
mixed gas enters the vertical furnace for hot ore circulating 
air cooling. According to the sintering 
flue gas reduction and waste heat comprehensive utilization process, the sintering 
flue gas and sinter 
sensible heat can be utilized effectively, the flue gas emission is 
cut down, pollutants such as dust, SO2, 
NOx and dioxin can be removed at the same time, the occupied space is small, and the investment is small.