Ultra-fine Electric Furnace Nickel Iron Slag Prepared by Steam Power Mill
-
摘要: 电炉镍铁渣排放量日益增长，直接利用率低，为了提高电炉镍铁渣的综合利用价值，采用LNGS-80型（总功率6.7 kW、蒸汽耗量80 kg/h）蒸汽动能磨对电炉镍铁渣进行了超细粉碎试验，研究了分级机转速对电炉镍铁渣粒度、比表面积和产量的影响，并估算了LNGS-10T型（总功率165 kW，耗气量10 000 kg/h）蒸汽动能磨制备镍铁渣的能耗和成本。结果表明：采用LNGS-80型蒸汽动能磨对电炉镍铁渣粉碎分级可制备出常见的d50=12.9~52.7μm，比表面积305~669 m2/kg，产量为167~480 kg/h超细粉体，又能制备d50=2.4~4.7μm，比表面积为1 788~2 669 m2/kg，产量为35~80 kg/h的超细粉体；预估LNGS-10T型蒸汽动能磨制备d50=28.5μm，比表面积为464 m2/kg的电炉镍铁渣细粉，系统电耗为5.2 kWh/t，相比于辊磨电耗量节约89%，成本节约11%。Abstract: The electric furnace nickel-iron slag emission is increasing,but the direct utilization rate is low.In order to improve the comprehensive utilization value of electric furnace nickel iron slag,ultra-fine pulverization experiments were carried out on a LNGS-80 steam power mill（total power 6.7 kW,steam consumption 80 kg/h）.The effects of the classifier speed on the particle size,specific surface area and output of the electric furnace nickel-iron slag were studied.The energy consumption and cost for milling the nickel-iron slag by the LNGS-10 T steam power mill（total power 165 kW,gas consumption 10 000 kg/h） were estimated.The results show that the ultra-fine powder commonly with d50=12.9～52.7 μm,specific surface area of 305～669 m2/kg and yield of 167～480 kg/h,or the ultra-fine powder with d50=2.4～4.7 μm,specific surface area of 1 788～2 669 m2/kg and yield of 35～80 kg/h can be prepared by pulverization and classfication of electric furnace nickel-iron slag using LNGS-80 steam power mill.It is estimated that LNGS-10 T steam power mill can prepare fine powder of electric furnace nickel-iron slag with d50=28.5 μm and specific surface area of 464 m2/kg,and the system power consumption is 5.2 kWh/t which saves 89% of power consumption and 11% of cost compared with the roller mill.
-
计量
- 文章访问数: 145
- HTML全文浏览量: 34
- PDF下载量: 3
- 被引次数: 0
下载:
