氨法制备氧化铁红晶种影响因素研究

摘要

以硫酸亚铁为原料,采用氨法制备氧化铁红晶种,对制备过程的影响因素进行了详细的研究.结果表明:在初始硫酸亚铁浓度为30 g/L,反应温度为16℃,充气量为20L/h,稀释氨水添加量为34 mL/L(NH<,3>H<,2>O与FeSO<,4>物质的量之比为=2.17:1),稀释氨水加入速率为0.45 mL/s条件下,反应所需时间较短,生成的晶种质量最好.%The preparation of the iron oxide red seed by ammonium process with FeSO4 as raw material, and the influencing factors in preparation process has been studied in details. The results showed that under conditions of the concentration of ferrous sulfate of 30 g/L, reaction temperature 16 ℃, the volume of air 20 L/h, the addition of the diluted ammonia water 34 mL/L (molar ratio of NH3H2O and FeSO4 2. 17∶1 ), and the adding rate of diluted ammonia water 0. 45 mL/s,the best seed are generated with short reaction time.