DHHI is an enterprise leading in design, manufacture, installation and commissioning of coke oven machinery in China. Since the 1950s, DHHI has designed and manufactured more than 500 units/sets of coke oven machinery with various types and specifications for 3.2m, 3.8m, 4.3m, 5.5m and 6.25m tamping coke ovens, and type 58, type 66, type 80 and type 90 top-loading coke ovens with heights of coking chamber of 5m, 5.5m, 6m, 6.2m, 7m and 7.63m, which were all supplied for the major projects of China, such as metallurgical industry, chemical industry and city gas, thus further improving the level of mechanization, environmental protection and automation of coke oven machinery.

DHHI successfully developed and manufactured a variety of medium-sized, special-type and environment-friendly coke oven machinery, and its level of design, manufacturing and installation of coke oven machinery has always led in China.