Herein, the coal-based reduction was proposed to utilize the ferronickel slag of Jingchuan company. An excellent index with metallization rate of 99.22%, iron grade of 77.91%, and iron recovery of 92.79% was obtained at carbon addition coefficient 2.0, reduction temperature 1573 K, reduction time 60 min, the particle size of coal and ferronickel slag − 2.0 mm, and CaO content 15%. The 2FeO·SiO₂ was reduced to Fe and SiO₂ with the increase of temperature. The CaO could promote the reduction of iron oxide. Most of the sulfides (Fe, Cu, Co, and Ni) in the sulfonium were reduced to metal. The reduction degree increased with the reduction time and reduction temperature. The higher reduction temperature represented the higher peak value of reduction rate and the shorter time of reaching the peak value. The isothermal reduction process included three stages: early stage, middle stage, and late stage. The mechanism function were f(α) = 1/2(1 − α)³, f(α) = 3/2(1 − α)^4/3[(1 − α)^−1/3 − 1]⁻¹, and f(α) = 4(1 − α)[− ln(1 − α)]^3/4, respectively. The activation energy of three stages was 183.498 kJ·mol⁻¹, 420.077 kJ·mol⁻¹, and 656.619 kJ·mol⁻¹, respectively.

在此，提出利用京川公司镍铁渣进行煤基还原。在碳添加系数2.0、还原温度1573 K、还原时间60 min、煤和镍铁渣粒度-2.0的条件下，获得了金属化率99.22%、铁品位77.91%、铁回收率92.79%的优良指标。 mm，CaO 含量 15%。2FeO·SiO ₂被还原为 Fe 和 SiO ₂随着温度的升高。CaO可以促进氧化铁的还原。锍中的大部分硫化物（Fe、Cu、Co 和 Ni）被还原为金属。还原程度随着还原时间和还原温度的增加而增加。还原温度越高，代表还原速率峰值越高，达到峰值的时间越短。等温还原过程包括三个阶段：早期、中期和晚期。机制函数为f ( α ) = 1/2(1 -  α ) ³ , f ( α ) = 3/2(1 -  α ) ^4/3 [(1 -  α ) ^-1/3  - 1] ^-1, 和f ( α ) = 4(1 -  α )[- ln(1 -  α )] ^3/4，分别。三个阶段的活化能分别为183.498 kJ·mol ^-1、420.077 kJ·mol ^-1和656.619 kJ·mol ^-1。