COPPER PLATE-TYPE REFRIGERATOR FOR BLAST FURNACE Russian patent published in 2003 - IPC

FIELD: ferrous metallurgy. SUBSTANCE: refrigerator has housing with paired longitudinal cooling water circulation channels made by forming through openings having diameter making 0.25-0.4 the thickness of housing. Space between axes of paired channels in each pair of channels makes 1.5-2.0 of their diameter. Longitudinal channels are plugged at housing ends. Refrigerator has at least two pairs of longitudinal channels. Cavities of each pair of longitudinal channels are connected through cylindrical dead bottom channels extending perpendicular to housing surface. Cooling water supply and discharge branch pipes are fixed in dead bottom channels. Axes of dead bottom channels are spaced from refrigerator housing surface by distance equal to 0.8-1.3 of housing thickness. Diameter of dead bottom channels is 1.9-2.2 the diameter of longitudinal channels and their depth is the total of halves the thickness of refrigerator housing and diameter of longitudinal channels. Width of housing is 5-7 thicknesses thereof. Housing has at least two pairs of through threaded attachment openings extending perpendicular to housing and axially aligned with spacer bushings having height of 30-60 mm. Refrigerator has ribbed working surface with ribs perpendicular to housing axis and having height making 0.25-0.45 the housing thickness. Ribs have trapezium-shaped section. Trapezium-shaped slots between ribs have base width equal to 1.9-2.1 the height of ribs. Copper plate-type refrigerators are located in various furnace zones and are made of different shapes. Copper refrigerator for bosh extension is made rectangular and its length is equal to that of bosh extension and its width is determined as quotient of division of bosh extension perimeter by number of refrigerators thereof. Refrigerator for furnace shaft is made trapezium-shaped. Its base length and width ratio is (18-25): 1. Width of upper and lower faces depends upon their location in vertical plane of furnace shaft. Such construction allows blast furnace to operate for 15-25 years without changing its masonry and refrigerators. EFFECT: increased efficiency by providing intensive heat withdrawal and keeping lining slag in stable state on furnace walls. 12 cl, 4 dwg