Title

HIGH-TEMPERATURE SHAFTLESS HOT STOVES FOR BLAST FURNACES

HIGH-TEMPERATURE SHAFTLESS HOT STOVES FOR BLAST FURNACES

Authorship

Kalugin, Iakov

Kalugin, Iakov

I am this author

DOI

10.5151/2594-357X-22711

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Abstract

Increase of BF blast heating temperature is one of the most important ways to increase economic efficiency of BF production. Existing structures of hot stoves with internal and external combustion chambers do not allow for this. The Kalugin shaftless hot stove makes it possible to heat BF blast up to 1,300°C-1,400°С while using standard refractory materials (silica, mullite-corundum, and fireclay) and provides high economic and ecological values. It provides the possibility of carrying out reconstruction of existing aging hot stoves with increase of blast heating temperature and substantial savings in capital expenditures. This construction is fast spreading at the blast furnaces of 250-5,500 m³ volume in several countries (Russia, China, Ukraine, India, and Japan). 149 Kalugin hot stoves are in operation, and 52 more are in the process of designing and construction. Kalugin hot stove systems have been commissioned at two 5,500 m3 blast furnaces in China (Shougang Jingtang United Iron and Steel Co., Ltd., Caofeidian), hot blast temperature of 1,300°С has been achieved. Replacement of the hot stoves with external combustion chamber for shaftless ones has started at big blast furnaces: commissioning of the hot stoves at blast furnaces of 4,300 m³ and 5,000 m³ volume at JFE Steel Corporation, Fukuyama, Japan has been completed; hot stoves at the 5,500 m³ blast furnace of “Severstal” Company, Cherepovets, Russia are being modified.

Increase of BF blast heating temperature is one of the most important ways to increase economic efficiency of BF production. Existing structures of hot stoves with internal and external combustion chambers do not allow for this. The Kalugin shaftless hot stove makes it possible to heat BF blast up to 1,300°C-1,400°С while using standard refractory materials (silica, mullite-corundum, and fireclay) and provides high economic and ecological values. It provides the possibility of carrying out reconstruction of existing aging hot stoves with increase of blast heating temperature and substantial savings in capital expenditures. This construction is fast spreading at the blast furnaces of 250-5,500 m³ volume in several countries (Russia, China, Ukraine, India, and Japan). 149 Kalugin hot stoves are in operation, and 52 more are in the process of designing and construction. Kalugin hot stove systems have been commissioned at two 5,500 m3 blast furnaces in China (Shougang Jingtang United Iron and Steel Co., Ltd., Caofeidian), hot blast temperature of 1,300°С has been achieved. Replacement of the hot stoves with external combustion chamber for shaftless ones has started at big blast furnaces: commissioning of the hot stoves at blast furnaces of 4,300 m³ and 5,000 m³ volume at JFE Steel Corporation, Fukuyama, Japan has been completed; hot stoves at the 5,500 m³ blast furnace of “Severstal” Company, Cherepovets, Russia are being modified.

Keywords

Blast furnace; BF hot stove; Burner system; Checker.

Blast furnace; BF hot stove; Burner system; Checker.