ＢＲ型半热风熔炉节能技术目前，中小型铸造厂不少厂家仍采用间距送风技术，有的也曾采用过炉顶余热回收通过风机送进炉内，但因热气体中含灰尘及腐蚀气体，加速了风机的磨损与腐蚀，从而限制了热风技术的发展应用。老式冲天炉熔铁炉存在问题为：ｌ）炭铁比一般在１：６范... BR-type semi-hot blast furnace energy-saving technology At present, many small and medium-sized foundries are still using the distance of air supply technology, and some have also used top waste heat recovery through the fan into the furnace, but the hot gas containing dust and corrosive gases , Accelerated fan wear and corrosion, thus limiting the development and application of hot air technology. Old cupola melting furnace there are problems: l) carbon and iron than the general 1: 6 van ...