Roughing machine is suitable for rough rolling, is desired mill equipment of rolled carbon steel, alloy steel, stainless steel, copper, aluminum and others, that rolled out from the furnace and rolled into the requested shape, size, ingredient and performance for biting off to the shelf mill. Due to rolled pieces of the furnace temperature is high, with good steel plastic and deformation resistance, under the big rolling reduction which generally about 50%, that could achieve rolled out pieces of good performance, no residual stress, dense texture, small grain and air bubbles.

Rolling machine is used for raw materials rough finishing, therefore request large capacity, generally defined the classification as the mill roller space, depending on roll diameter can be specified as 700mm, 750mm, 850mm and other specifications. Depending on function is generally divided into ACF blooming slabbing mill, ACP blooming slabbing mill AP billet mill and other categories.

NHI is the earliest engaged in design, manufacturing of roughing mill machine. We self-designed the blooming mill of roller diameter 700 mm, 750 mm used for 2 ~ 3t ingot cogging, and has produced several sets such mills. China's first 700 mm cogging mill was fabricated by NHI, that ever presented in Industrial Exhibition Hall in Beijing and recognized by the relevant National Ministries, The cogging mill NHI designed as 800 mm was used for WISCO plant, and the designed the 850 mm blooming mill, either rolled billet or rolled slab, is referred to as square slab cogging mill, then be connected to and affiliated with the billet continuous mill, provided billet for medium-sized finished product. Our company is the earliest designer & manufacturer of domestic roughing mill, whether it is a complete set of rolling mill, or single machine, all features in a reasonable structure, easy maintenance, and operational reliability, well adopted by the real user.