Physical Simulation and Optimization of Submerged Entry Nozzle Used for Rectangular Bloom
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摘要: 通过水模实验优化水口结构形式和工艺参数,解决某钢厂165 mm×280 mm矩形坯连铸机在生产中出现的夹渣、鼓肚和粘结漏钢问题。优化范围包括水口的插入深度、出口倾角以及出口侧面和横断面的面积比。结果显示不同的水口形式对流场有不同的影响,目前使用的直通型水口正是造成生产中出现问题的症结所在。通过实验优化出适合165 mm×280 mm矩形坯的9#双侧孔水口和42#四孔水口。Abstract: In order to solve the problems of slag inclusion,bulging and sticker breakout on the 165 mm×280 mm rectangular bloom in a steel work,the structure forms of submerged nozzle and processing parameters are optimized by means of simulating experiment.The optimization of parameter includes submerged depth of the nozzle,tilted angle of the nozzle port,and area ratio of nozzle port and nozzle section.The results of the simulation experiment show that various nozzle parameters have different effect on the fluid flow behaviour.The single outlet SEN used at present is the sticking point of problem in production process.A two side outlet SEN 9# and a four side outlet SEN 42# adapted to 165mm×280mm rectangular bloom are optimized.
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Key words:
- continuous casting /
- rectangular bloom /
- mold /
- submerged nozzle /
- physical simulation
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