LIN Yin-he
,
GUO Zhan-cheng
,
TANG Hui-qing
,
REN Shan
,
LI Jing-wei
钢铁研究学报(英文版)
Micro-fluidized bed reactor is a new research method for the reduction of iron ore fines. The reactor is operated as a differential reactor to ensure a constant gas concentration and temperature within the reactor volume. In order to understand the dynamic process of the reduction reaction in micro-fluidized bed, a series of kinetic experiments were designed. In the micro-fluidized bed, the use of shrinking core model describes the dynamic behavior of reduction of iron ore. And the apparent activation energy is calculated in the range of 700-850 ℃ while the initial atmosphere is 100% content of CO.
关键词:
iron ore reduction
,
micro-fluidized bed
,
dynamics
ZHANG Jian-liang
,
REN Shan
,
SU Bu-xin
,
LIN Yin-he
,
LONG Shi-gang
钢铁研究学报(英文版)
In order to study the combustion characteristics of waste tire particle (WTP), pulverized coal (PC) and their mixture, the contents of CO, CO2 and O2 of off-gas during the combustion of WTP, PC and mixture under the condition of rich oxygen by 0-4% in blast and at 1250 ℃ were measured simultaneously using synthetically infrared analyzer, and then the corresponding combustion ratio was calculated and compared. The results showed that the burning rate of WTP reached approximately 57%, which is much higher than that of PC (only about 18%) in the initial 650 s in fresh air, and then the increase of combustion rate of PC is faster than that of WTP; the combustion rate of PC improved remarkably with the addition of WTP. Meanwhile, the combustion rates of all these materials improved with the increase of oxygen content.
关键词:
blast furnace
,
waste tire particle
,
pulverized coal
,
combustion ratio
