| This thesis is aimed to design the current regulator and to make it from magnesia for the 75t (?) in the Fourth Branch of Maanshan Iron & Steel Company Limited.The numerical simulation was carried out by using the CFX software based on the technological parameters online and was confirmed with water model.The optimized geometry shape and dimensions for the currnent regulator were proposed and had been adopted in site.The iron monoxide powder,the SiO2 ultra-fine powder,theα-Al2O3 ultra-fine powder,the MA spinel powder and the magnesia powder were added to the magnesia regulator as the binders.A research was carried out on the composition and the bonding of the materials.lt is concluded as follow:1.The magnesia powder can be used as the binder for the materials with the quantity 2-4% as the best.2. Small amount organic fibres is effective enough to free magnesia material from explosive when heated rapidly.3.Iron monoxide is suitable to enhance the magnesia materials at middle and high temperatures.The sugested mount is 1wt%. The magnesia materials with good anti-hydralization property and high density as well as high strength were obtained by the combination addition of 2% magnesia with the 2% SiO2 ultra-fine powder.4.Theα-Al2O3 ultra-fine powder was found good for the improvement of the resistant to therm-shocking of the magnesia materials.
|
PDF Full Text Request