Method of controlling the heat balance in a shaft-type metallurgical furnace
AssigneeArbed S.A.
InventorPaul Metz
Life of this patent
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Abstract
The heat balance in a shaft furnace, e.g. a blast furnace for the production of iron, is controlled by feeding peat in a comminuted form, i.e. with a mean particle size of 0.05 to 1 mm and a water content of less than 25%, into the blast furnace. The peat is previously comminuted by abrasion and the abraded product dried to a water content of less than 25%.
Claims4
A method of controlling the heat balance of a shaft furnace to which a hot blast gas is fed through tuyeres, and wherein said furnace has a hearth at which the tuyeres open into the furnace, said method comprising metering peat particles having a mean particle size of 0.05 to 1 mm into the blast gas fed into said furnace in response to the temperature in the region of said hearth, said peat particles having a water content of less than 25%.
An apparatus for controlling the heat balance in a blast furnace having tuyeres for feeding a hot blast gas into said furnace at a hearth thereof, said apparatus comprising:
- means for abrasively milling raw peat to produce particles thereof;
- means for drying said particles to an average particle size of 0.05 to 1 mm and a water content less than 25%;
- means connected to said drying means for metering the dry particles into said blast gas;
- and
- control means responsive to the temperature in the region of said hearth for controlling said metering means.
Dependencies are inferred from the claim text.