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使用不同配比的CO-CO_2混合气体在热天平上对赤铁矿球团矿进行了Fe_2O_3-Fe_3O_4-Fe_xO-Fe的逐段还原试验。球团矿是使用首钢迁安磁选精矿在试验室中经氧化焙烧制成的。还原试验温度是800、850、900、950和1000℃。对试验结果按混合控速的等温收缩核模型做了解析处理。得到的化学反应速度常数是固相产物迷宫度是利用这些速度参数对各次试验做的数值模拟与实际试验结果相符合。
The hematite pellets were subjected to a section-by-section reduction of Fe 2 O 3 -Fe 3 O 4 -Fe_xO-Fe on a thermobalance with different CO-CO 2 mixed gases. Pellets are Shougang Qian’an magnetic separation concentrates in the laboratory by oxidation roasting made. The reduction test temperatures were 800, 850, 900, 950 and 1000 ° C. The experimental results were analyzed and treated according to the isothermal contraction kernel model with mixed speed control. The obtained chemical reaction rate constant is the degree of labyrinth of the solid phase product. The numerical simulation of each test using these speed parameters is consistent with the actual test results.