The Research Of Heat Balance Alternation Rules

Now,PCI is used into the blast furnace mainly. Metallargists study continuously,develops new techniques and improve the operation of equipments etc in order to increasethe quantity of injection, but up to today they have not obtained the ideal results andfunctions, from another point of view blast furnace coal powder injection also bring manynegative influence to the blast furnace smelting. Under this condition, we put up a newprocess---rich oxygen and coal gas injection. This new process have a special point that isit through coal to gas instead of coal, this new process makes melting process becomemore easy and avoids disadvantages about PCI to blast furnace.It is the foundation that injecting 200kg coal powder,using the coal gas to replacethe coal powder.By the imitated calculation of computer,it can satisfy the need ofreduction agent and heat agent when the rate of enrich oxygen is to 30% and injection600m3/tFe coal gas,according to the calculation of material balance and heat balance, itanalysed the calculation results in different conditions and generalized the circumstance ofheat balance and the rules of heat balance after injection gas, the new process is possible intheory; Carrying on the lowest coke ratio and ensuring the lowest coke ration in newprocess, getting the lined ralationship between coke ratio and reduction degree.Compared each craft parameters with traditional blast furnace process. The result ofcomputing prove:the new process have many advantages in kind of ways. It can decreasecoke ratio to about 40% compared with the traditional blast furnace craft, it hasadvangtages such as high rate of production and lower coke ratio, little consuming, strongatmosphere in stove, the coal gas has higher hot value and so on. advantage.it has verycaptivating development application foreground.The rich oxygen and coal gas injection process can regulate the theories combustiontemperature through the quantity of coal gas; Pass the variety of the coal gas compositioninside the blast furnace,the heat distribute can more uniform from bottom to top in theblast furnace through the component alternation of coal gas, removed negative influencesof the coal powder injection to the blast furnace.