CAJ | 학술논문

采用热态可视流化床装置研究了973～1173 K 不同气氛条件对流态化还原铁矿粉黏结失流的影响.研究发现,一定表观气速条件下温度和还原气氛组成对失流时铁矿粉的金属化率影响不大,而失流时颗粒微观形态受还原气种类和温度的影响较显著,但还原气体积分数对形态的影响较小.此外,流化时间随着还原气体积分数的增大而逐渐缩短,并通过线性拟合得到了不同温度时二者间的数学关系式.
채용열태가시류화상장치연구료973～1173 K 불동기분조건대류태화환원철광분점결실류적영향.연구발현,일정표관기속조건하온도화환원기분조성대실류시철광분적금속화솔영향불대,이실류시과립미관형태수환원기충류화온도적영향교현저,단환원기체적분수대형태적영향교소.차외,류화시간수착환원기체적분수적증대이축점축단,병통과선성의합득도료불동온도시이자간적수학관계식.
@@@@The sticking during reduction of iron ore fines under different atmosphere conditions was studied by using a thermal state visible fluidized bed from 973 to 1173 K. It is found that when defluidization occurs the influences of temperature and reducing atmosphere on the metallization rate of iron ore fines are limited if the superficial gas velocity is constant. At the same time, the surface microstructure of particles when defluidization happens is strongly dependent on reducing gas types and reduction temperature, but it is less dependent on the volume fraction of reducing gas. In addition, with the volume fraction of reducing gas increasing, the fluidization time of iron ore fines gradually decreases, and the mathematical relationship between them was obtained by linear fitting at different temperatures.