Water-cooling jacket structure for inspection hole of flash furnace

A water-cooling jacket structure for an inspection hole of a flash furnace arranged at the periphery of a vertically arranged concentrate burner extending vertically from en a ceiling of a reaction shaft of a flash furnace for inspecting and cleaning the inside of said furnace and said concentrate burner,

• said water-cooling jacket structure being formed in a upright elongate shape with a hollow center formed by combining a plurality of jacket plates joined together around the hollow center, said jacket structure having a lower part disposed over the inspection hole at the periphery of the concentrate burner extending from the ceiling of the reaction shaft of the flash furnace, and an upper part extending at an inclined angle from the inspection hole so as to be inclined away from the vertically arranged concentrate burner,
• wherein said plurality of jacket plates are cast internally with cooling tubes for circulating cooling-water, the cooling tubes allowing to adjust cooling capacity and amount of cooling-water by circulating cooling-water to a single or multiple cooling tubes of the respective cooling-water systems of each jacket structure depending on the heat-load of said flash furnace, and
• wherein a front jacket plate of said plurality of jacket plates facing the concentrate burner has a section of a lower end part formed to match the periphery of the vertically arranged concentrate burner so that it can be positioned in abutting contact therewith and allow the cooling tubes of the front jacket plate to provide a cooling effect to its area of contact with the concentrate burner and thereby effectively reduce a temperature rise of the concentrate burner.