ZHENG Zhong
,
LI Deqian (Changchun Institute of Applied Chemistry
,
Chinese Academy of Sciences
,
Changchun
,
China Manuscript received 23 January
,
1995)
金属学报(英文版)
A technique was developed to study mass trans fer process and inter facial reaction in two phases system. This constant inter facial cell with a laminar flow was made into a cubic structure. The two fluids were continuously recycled and mixed. The concentration of each liquid could be monitored by two different methods. This kind of structure made both flows near the inter face flow parallel to the inter face. The inter face was smooth and steady. The mass trans fer rate could be judged by the linear velocity of the flows. The technique can be used for the analyses of the control step in both phases near the inter face in a diffusion control process. A preliminary hydrodynamics and mass trans fer study on the cell was presented, which ensures the distinguishing between a diffusion and a chemical reaction control process. A simplified mass transfer equation,N =0.5303D 1 /2* (Ci- Cb)* (V / B) 1/2, was achieved.
关键词:
: constant inter face cell
,
null
,
null
,
null
ZHU Dao fei
,
ZHENG Zhong
,
GAO Xiaoqiang
钢铁研究学报(英文版)
Aiming at the limitations of the traditional mathematical model for production planning, a novel optimization model is proposed to improve the efficiency and performance for production planning in steelmaking and continuous casting (SCC) process. The optimization model combined with parallelbackward inferring algorithm and genetic algorithm is described. To analyze and evaluate the production plans, a simulation model based on cellular automata is presented. And then, the integrated system including the production plan optimization model and the simulation model is introduced to evaluate and adjust the production plan online. The test with production data in a steel plant shows that the optimization model demonstrates ability to deal with time uncertainty in production planning and to set up a conflictfree production plan, and the integrated system provides a useful tool for dynamically drawing and adjusting a production plan online. The average staying time of the production plan is about 5% shorter than that in a practical process.
关键词:
steelmaking-continuous casting;production plan optimization;genetic algorithm;cellular automata
