Reducing Rotary Kiln For Sponge Iron (YB1939) high capacity,high efficiency,easy maintenance. ISO9001:2000,CQC,BV certificate. Reducing Rotary Kiln For Sponge Iron (YB1939) Rotary kiln is refer ... to rotate calcination kiln, belong to construction material equipment. Rotary kiln can be divided into cement kiln, metallurgy chemical kiln ...