优化球团矿生产工艺参数的实践

Practice of optimizing process parameters for pellet

程潮矿业公司球团厂以自产磁铁精矿生产酸性氧化球团,投产初期生产不畅,影响了产品质量。在分析生产原料理化性能的基础上,优化了球团矿生产过程的工艺参数。结果表明:沸腾炉炉膛温度600~650℃,辊磨电流350A以上,可确保原料的成球性能;造球盘倾角约49°,给料量60t/h,转速约7.6r/min,混合料水分8.0%左右,造球返料不大于30%时,可明显提高生球质量和成球率;链篦机布料厚度在180~200mm,预热段温度在940~980℃,焙烧温度在1 154~1 256℃时,球团矿成品质量得到提高,抗压强度达到2 500N/个。

The acid oxide pellet was produced with the self-produced magnetite concentrates in Pelletizing Plant of Chengchao Mining Industry Co.,Ltd..The initial production was not smooth,so the product quality was influenced.Based on analysis of the physical and chemical properties of the raw materials,the process parameters of the pellet production were optimized.The results showed that the balling performance of the raw materials could be ensured when the furnace temperature of the fluidized bed furnace was 600-650℃and the roller current was above 350 A.The quality of the green ball and the pelletizing ratio could be improved significantly when the inclination angle of the balling pan was about49°,the feeding amount 60 t/h,the speed about 7.6 r/min,the moisture of the mixed material about8%and the recycling ratio less than or equal to 30%.The finished product quality was improved and the compressive strength per ball came up to 2 500 Nwhen the thickness of burden distribution was 180-200 mm,the temperature of the preheating section 940-980℃and the roasting temperature 1 154-1 256℃.