Process of controlling Fe.sup.++ content of sintered iron ore
AssigneeDravo Corporation
InventorsFred Cappel, Walter Hastik, Georg Fleming, Pierre Hofmann
Life of this patent
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Abstract
A process for controlling the quality of sintered iron ore in which the Fe.sup.+ content of the sintered or is regulated by controlling the recycled-fines feed rate. The recycled-fines feed rate, determined by a prior art recycled-fines balance controller, is modified by a desired fines withdrawal rate generated in an Fe.sup.+ content controller as the difference between the actual Fe.sup.+ content of the sintered ore and a desired content. In a preferred form, the difference between the recycled-fines feed rate and the desired fines withdrawal rate is also applied to the Fe.sup.+ content controller.
Claims5
In a process for controlling the quality of sintered iron ore produced in a belt-type continuous sintering operation wherein a recycled-fines balance controller regulates the fuel rate and the recycled-fines feed rate to maintain a recycled-fines balance, the improvement comprising:
- determining the actual Fe.sup.++ content of the sintered iron ore, selecting a preset Fe.sup.++ content, applying the difference between the actual Fe.sup.++ content preset Fe.sup.++ content to an Fe.sup.++ content controller to produce a desired fines withdrawal rate, and modifying the recycled-fines feed rate as a function of the desired fines withdrawal rate to correct the Fe.sup.++ content to the preset value.
Dependencies are inferred from the claim text.