Shinroku Matsuzaki

Numerical analysis of flow and reaction in the raceway region of blast furnace

The authors developed a high-accuracy two-dimensional gas and powder flow and reaction model by using vector processor, and obtained the distribution of various variables of state near the blast furnace raceway regeon. Fluid and powder stream lines, vector of gas flow, powder holdup and coke-gas reaction, were calculated.

Large Scale Database-based Online Modeling using ICA of Visualized Process Data for Blast Furnace Operation

The large scale database-based online modeling, called LOM, is a type of just-in-time modeling for blast furnace. The database of LOM is so far built by quantizing directly measurement process data. Recently it has been shown that the image data generated by visualizing shaft pressure and stave temperature is very useful for blast furnace operation and guidance. In this paper we try to extend LOM to the one incorporated with the visualized process data. First we extract features of the visualized process data by using independent component analysis (ICA), and add the features (independent components) of the visualized process data, as process data, to the database of LOM. Prediction performance of the extended LOM is illustrated by using real process data

Development of the blast furnace integrated Java-based simulator

The controlled object is complicated, and the improvement in performance enhancement (high precision and speedup) and safety of the control system is required, and the demand which simulates the whole system heightens. In this research, the method of unifying two or more partial simulators for one simulator was proposed. By applying this method to the partial simulators for Rabit model (the burden distribution computation model) and Bright model (the internal model) on the blast furnace, the blast furnace integration simulator was constructed. JNI (Java Native Interface) is used in order to integrate the simulator described in the different language, and RMI (remote method invocation) is used in order to integrate the simulator which runs in the different environment (the multi-platform). These detail methods and the blast furnace integrated simulator are reported.

Development of the visual information technique of blast furnace process data

For the purpose of investigating more precise phenomenon in a blast furnace and monitoring its condition on line, the visualizing and analyzing system of blast furnace process data has been developed. The data of sensors located on the furnace with the spatial distribution are successively stored on line in data base system for a long period of time, the developed system unfolds the distribution of the data on the blast furnace to a 2-dimension plane which has two axis i.e. in the blast furnace height direction and in the azimuthal angle direction with the correctly consideration of each sensors position, so that the overall operational state of the furnace, which the skillful operators could imagine in each one of heads through their experience, was visualized as the picture information objectively.

Blast furnace operation support system integrated with partial unsteady simulator and LOM

In the field of pig ironmaking process, operation malfunction is caused by both enlarging a blast furnace and increasing use of low quality ore. Thus, operation support systems predicting a blast furnace performance are demanded. This paper reports a Java-based operation support system integrated with a “Large-scale database-based Online Modeling (LOM)” and a blast furnace simulator. The system predicts blast furnace performance by combining the partial unsteady simulator of the physical modeling method and the LOM of the local modeling method and supports the operation. To construct the system, the Java-based partial unsteady simulator is developed and the existing LOM is rebuilt by using versatile database and Java to realize the generalized LOM with general versatility. These systems are integrated by using Java.

DEVELOPMENT OF A MATHEMATICAL MODEL FOR BURDEN DISTRIBUTION IN A BLAST FURNACE

We investigated the burden characteristics of particle size distribution from charging equipment using a 1/3-scale test facility. It was discovered that the size distribution of the burden can approximate log-normal distribution each time and dispersion is constant. Moreover we devised a mathematical model for simulating particle size distribution from charging equipment. The calculation results were found of correspond with experimental results.

Java-Based Integrated Non-Stationary Blast Furnace Simulator

Abstract In the field of pig ironmaking process, operation malfunction is caused by both enlarging a blast furnace and increasing use of low quality ore. Thus, operation support systems predicting a blast furnace performance are demanded. On the other hand, the method of integrating many partial simulators for a complicated system in the consideration of interaction has been proposed. This paper presents Java-based integrated non-stationary blast furnace simulator that is constructed by applying the method to the partial simulators of the blast furnace. To construct the simulator, a partial non-stationary model is developed by using a stationary model as fundamental model. Moreover, the dynamic temperature in the blast furnace is calculated adequately by the simulator.

Java-based integrating simulator for blast furnace

Abstract The method of integrating many partial simulators for a complicated system in the consideration of interaction is proposed. Java Native Interface is used to integrate the simulators programmed in different languages. Remote Method Invocation is used to integrate the simulators in different computer environment. By applying the method to the partial simulators on the blast furnace, java-based integrating simulator for the blast furnace is constructed in order to support the operation of operator. Developing the simulator by the method can save considerable labour and decrease time consumption greatly than redeveloping. Furthermore, the visualization system comparing both the simulation results and the actual measurement data is reported.

DEVELOPMENT OF VISUAL EVALUATION AND NUMERICAL ANALYSIS SYSTEM OF BLAST FURNACE

Abstract Data the measurement sensor installed with spatial distribution on the blast furnace were successively accumulated online from the process computer to the database system over a long period. This is a new system that accurately considers the relation with the installation position of each sensor, and picture computerization of the measurement data was developed. The overall operation state of a blast furnace, which skilled operators can see in their minds eye, was objectively visualized as pictorial information.

Application of large scale database-based online modelling on blast furnace operation

Abstract A practical method of JIT modelling for a blast furnace process data whose characteristics are very complicated physical phenomena and stiff nonlinear process are studied. The proposed method is composed of severely selecting process data variables by stepwise method and searching the past similar data in quantized topological space constructed by the selected variables. The effectiveness of this method is confirmed. It is also confirmed that it is sufficiently possible to apply this method to online use because the calculation time is quite short for searching the past similar data and estimating the future.