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研究了流化床铁矿粉直接还原过程中掺入惰性物质对防止粘结的效果以及粘结失流与铁矿的组成、粒度、还原温度、还原气氛、金属化率、掺入惰性物质种类、数量等多种因素的关系,探讨了粘结失流机理。结果表明:MgO是最有效的防止粘接添加剂,使用量小于5%;CaO次之,使用量约为5%～10%。少量焦粉、白云石、碳酸钙等对抑制粘结失流无明显的作用。铁矿的熔点越低、粒度越小、金属化率越高、温度越高就越容易失流。
The effects of inert materials incorporated into the fluidized bed iron ore powder during the direct reduction process, as well as the effects of the bonding loss and iron ore composition, particle size, reduction temperature, reducing atmosphere, metallization ratio, , Quantity and other factors, discussed the mechanism of bond loss. The results show that: MgO is the most effective additive to prevent adhesion, the use of less than 5%; CaO followed by the amount of about 5% to 10%. A small amount of coke powder, dolomite, calcium carbonate, etc. to inhibit the loss of adhesion no significant effect. The lower the melting point of iron ore, the smaller the particle size, the higher the metallization rate, and the higher the temperature the easier it is to lose.