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采用人工合成的不同铝替代量的针铁矿和赤铁矿，进行模拟研究了森林大火引起土壤中针铁矿和赤铁矿向磁性矿物转化的机理。结果表明，外铁矿和赤铁矿中铝替代量和转化体系的氧化还原条件，对生成的磁性矿物的种类和数量影响很大。铝替代量越高，越不易向磁性矿物转化；体系中还原性气体浓度越大，越利于向磁性矿物转化。由两种矿物的转化温度，还解释了土壤灼烧过程的Ｘ－ｔ曲线的第二个峰是由外铁矿或赤铁矿向磁性矿物转化引起的。
A synthetic synthesis of goethite and hematite with varying amounts of aluminum substitution was used to simulate the mechanism of the conversion of goethite and hematite into magnetic minerals in forest fire caused by forest fires. The results show that the substitution amount of aluminum in the external iron ore and hematite and the redox conditions of the conversion system have a great influence on the types and quantities of the generated magnetic minerals. The higher the aluminum substitution, the less likely it is to convert to magnetic minerals; the greater the reducing gas concentration in the system, the more conducive to the conversion of magnetic minerals. The transition temperature from the two minerals also explains that the second peak of the X-t curve of the soil burning process is caused by the conversion of the iron ore or the hematite to the magnetic mineral.