Study On Proportioning Ratio Scheme Of Shaft Furnace Pellet In Medium And Heavy Plate Company Limited

The quality of the pellets produced by the shaft furnace is relatively poor in Medium and Heavy Plate Company Limited,mainly in the bonding is serious,the ball burst temperature is relatively low,metallurgical performance is relatively poor,to the blast furnace smelting process has brought adverse effects.If a large number of imported highquality iron ore powder,pellet production costs will be significantly improved,to reduce the blast furnace smelting production costs have a negative impact.Yansan iron concentrate powder and Si Jiaying iron concentrate powder are the company’s selfproduced iron ore concentrate powder,rich reserves,to the factory price is low.In the production process of shaft furnace pellets if you can make full use of the Yansan iron concentrate powder and Si Jiaying iron concentrate powder can significantly reduce the pellet production costs,in order to reduce blast furnace smelting production costs to create favorable conditions.This paper is to research the distribution plan of shaft furnace pellets by using Yansan iron concentrate powder and Si Jiaying iron concentrate powder as raw material in Heavy Plate Company.Through the systematic research on the process of pelletizing,drying and roasting of shaft furnace pellets in Heavy Plate Company,the results show that in the current raw materials and process conditions,Heavy Plate Company shaft furnace pellet production process the bentonite ratio control in about 3% can meet the pellet strength needs,but also can improve the pellet iron content and metallurgical properties,to meet the requirements of blast furnace smelting.Sanyou bentonite should be preferred as a binder for pellets in the process of pelletizing.The pellets of adding Yugang bentonite can basically meet the requirements of blast furnace smelting,while the addition of Qiyan bentonite pellets ball burst temperature is too low,will deteriorate the quality of the pellets of the finished product.It’s not appropriate to add Qiyan bentonite as the binder of pellets.The iron content of Yanshan iron concentrate power and Si Jiaying iron concentrate power are higher,but the magnetite content are lower.The magnetite content of the Yanshan iron concentrate power is higher than that of Sijiaying iron concentrate powder.The improvement of the ratio of Yanshan iron concentrate power can improve the quality of the ball,reduce the swelling rate of pellets reduction,but it has a negative influence on the reduction performance of pellets.Considering the influence of the proportion of Yanshan iron concentrate power on the pelletizing process and the metallurgical properties of pellets,and the limit of the resource conditions and production costs of Yanshan irons concentrate power,Heavy Plate Company shaft furnace pelletizing ore in the proportion of Yanshan iron ore should not be less than 75%.