Method for controlling an operation of a blast furnace
AssigneeNippon Kokan Kabushiki Kaisha
InventorsKazumasa Wakimoto, Motohiro Shibata, Takaharu Ishii, Masaaki Sakurai
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Abstract
A method for operating a blast furnace by inferring the operating conditions in the blast furnace, on the basis of data supplied from sensors set in the blast furnace and also on the basis of the knowledge base formed by experience on the operation of the furnace by a small-scale computer and various processing units provided within the computer. Prior to the inference, the data from the sensors are processed by a large-scale computer and various processing units provided within the large-scale computer. The inference is performed by using certainty factor values, thereby making diagnosis of slip, hanging and channeling.
Claims15
A method for preventing channeling, slip and hanging in a blast furnace, comprising the steps of:
- measuring a burden-descent speed by a first sensor means;
- measuring an in-furnace pressure by a second sensor means;
- measuring a burden temperature by a third sensor means;
- measuring an in-furnace gas temperature by a fourth sensor means;
- measuring a composition of an in-furnace gas by a fifth sensor means;
- measuring a pressure of a blast gas blown in through tuyeres set in the blast furnace by a sixth sensor means;
- storing first data from the first to sixth sensor means;
- processing said first data, and preparing second data corresponding to the conditions of the channeling, slip and hanging in the blast furnace;
- preparing true-and-false data, as third data, by comparing said second data with standard data;
- inferring conditions of channeling, slip and hanging, from the third data and from a knowledge base formed by accumulated experience on an operation of the blast furnace;
- and
- repeating the above-mentioned steps at predetermined intervals.
Dependencies are inferred from the claim text.