Process for producing pig iron and cement clinker
Assignee"Holderbank" Financiere Glarus AG
InventorAlfred Edlinger
Life of this patent
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Abstract
In a process for the preparation of pig iron and cement clinker in a fusion gasifier (3) in which the charge is at least partly preheated and possibly deacidified and subjected to preliminary reduction or is used in the form of scrap, coal is blown into a fluidized bed (7) and gasified with the reduction of the charge and pig iron (8) and slag (9) are tapped off in liquid form, the procedure is such that the lime charge introduced into the fusion gasifier (3), possibly together with a portion of an iron ore, is preheated in a preheating shaft (1) and calcined and charged according to the clinker composition required.
Claims15
Process for the preparation of pig iron and cement clinker in a fusion gasifier comprising the steps of:
- preheating a charge. Comprising lime, and optionally iron ore, in a preheater;
- optionally deacidifying the charge;
- optionally subjecting the charge to preliminary reduction;
- calcining the charge to produce a preheated calcination product;
- optionally sintering the calcination product;
- introducing the calcination product into the fusion generator;
- blowing coal into a coal fluidized bed of the fusion generator;
- reducing and melting the calcination product in the coal fluidized bed of the fusion generator to produce slag having an enhanced CaO content;
- tapping off pig iron and the slag in liquid form from the fusion generator;
- and
- cooling the slag to for the cement clinker.
Dependencies are inferred from the claim text.