Increasing the temperature of hot blast is an important measure for higher coal rate and lower fuel rate of blast furnace.

提高热风温度是高炉增加喷煤量和降低燃料比的重要措施。

youdao

Coke gas was introduced into blast furnace hot air stove by use of ejector to increase air temperature so as to achieve the aim of reducing coke rate and increasing the production.

利用引射器将低压焦炉煤气引入高炉热风炉中以提高风温，达到了降低焦比、提高生铁产量之目的。

youdao