Experimental Study on Preparation of Alkaline Pellets with Low-Quality Magnesium-Containing Raw Materials
In order to identify the feasibility of preparing alkaline pellets with low-quality magnesium-containing flux,experiments on pelletizing,preheating and roasting were carried out.Three kinds of magnesium-containing flux from Wulongquan Mine of WISCO Resources Group Co.,Ltd.,including interbedded dolomite,light-burnt material and light-burnt dolomite,were taken for pelletizing,and then effects of different magnesia flux and the adding amount on pelleting,as well as following preheating and roasting processes of alkaline pellet were all explored.The results show that the green ball prepared with the flux of interbedded dolomite presents superior performance.It is found that with alkalinity of 0.8,the green ball prepared with two different blending schemes have drop number of 4.1 and 6.6 respectively from height of 0.5 m,and compressive strength of 20.3 N/pellet and 22.3 N/pellet respectively.By increasing the addition of magnesia flux in two blending schemes,both preheated balls and roasted balls have their strength decreased after an initial improvement.With alkalinity between 0.6 and 0.8,the prepared pellet can have compressive strength of 2 620 N/pellet and 2 963 N/pellet respectively after preheating and roasting process.It is recommended that with interbedded dolomite and light-burnt material as magnesia flux,the alkaline magnesium-containing pellet prepared with alkalinity of 0.6-0.8 can meet industrial requirements.
万方数据
维普
