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US 6,332,911 B1Granted
Method and plant of utilizing fine coal in a melter gasifier
AssigneeDeutsche Voest-Alpine Industrieanlagenbau GmbH
InventorsGünter Schrey, Parviz Zahedi
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AssigneeDeutsche Voest-Alpine Industrieanlagenbau GmbH
InventorsGünter Schrey, Parviz Zahedi
Estimating the term…
In a method for the production of liquid metal, in particular liquid pig iron (9) or liquid steel pre-products, from metal carriers, in particular partially reduced or reduced sponge iron (3), in a melter gasifier (1) in which with supply of a carbon-containing material at least partially formed of fine coal (16) and coal dust (13) and with supply of oxygen or oxygen-containing gas the metal carriers are melted in a bed (4) of the carbon-containing material at the simultaneous formation of a reducing gas, optionally upon previous final reduction, fine coal (16) and coal dust (13) which are being charged, are mixed with bitumen (20) in the hot state, after undergoing a drying operation, and subsequently are cold-briquetted, and the briquettes (25) thus formed are charged to the melter gasifier (1) in the cold state and in the melter gasifier (1) are subjected to shock-heating.
Method for the production of liquid metal from metal carriers (3) in a melter gasifier (1) in which with supply of a carbon-containing material at least partially formed of fine coal (16) and coal dust (13) and with supply of oxygen or oxygen-containing gas the metal carriers are melted in a bed (4) of the carbon-containing material with the simultaneous formation of a reducing gas, optionally upon previous final reduction, characterized in that fine coal (16) and coal dust (13) are mixed with hot bitumen (20) and subsequently are cold-briquetted, and that the briquettes (25) thus formed are charged to the melter gasifier (1) and in the melter gasifier (1) are subjected to shock-heating, and wherein the charged carbon-containing material is dried and during and/or after drying of the carbon-containing material, the fine coal (16) and coal dust (13) are separated from lumpy carbon-containing material and further treated while hot.
Plant for the production of liquid metal from metal carriers comprising a melter gasifier (1), a feed duct (2) for metal carriers opening into the melter gasifier (1), feed ducts (5, 6a, 6b) for oxygen or an oxygen-containing gas and for a carbon-containing material formed at least partially from fine coal (16) and coal dust (13), a discharge duct (7) departing from the melter gasifier (1) for a reducing gas formed in a melter gasifier (1), and a tap (8, 8a) for pig iron (9) and slag (10) provided on the melter gasifier (1), characterized in that a drying means (12) is provided at an upstream end of the plant for the drying of carbon-containing material (11) that is being charged, downstream of which there are connected a mixer (19), together with means (21) for providing bitumen (20) to said mixer (19), and, subsequently thereto, a cold-briquetting means (24) for briquetting fine coal (16) and coal dust (13), with the cold-briquetting means (24) being flow-connected with the gasifier (1).
Dependencies are inferred from the claim text.