Effect Of Reactivity Of Reducing Agent On Reduction Process Of Carbon Pellets

Coke, anthracite, semi-coke are usually used as reductant ,Semi-coke powder is the siftage of semi-coke production process .If it can use semi coke powder instead of coke powder, anthracite and other reductant production carbon pellet, Not only saving coke resource also can bring certain economic benefits.In this paper, I uses thermal analyzer and mass spectrometry technology, research the semi-coke powder, coke, anthracite reaction of a reducing agent performance and reduction of iron ore powder reduction performance, and the reduction of iron oxide reduction kinetics were analyzed. Through the reduction of carbon pellet vertical furnace technology, discusses the carbon pellet in reducing agent and its performance on the reduction of carbon pellet reduction effect. The main results are as follows:1. compared with the different reducer as coke powder and anthracite, semi-coke powder and CO₂ response capacity is better;2. Reducing agent with iron powder reduction mechanism respectively: semi-coke powder and anthracite reduction mechanism for single-step nucleation mechanism, coke powder reduction mechanism for only two diffusion.3. The same experiment conditions, semi-coke powder reduction of iron oxide energy required minimal reduction reaction, The reduction reaction of the most easily.4. Carbon pellet in iron oxide by carbon thermal reduction by carbon gasification and iron oxide indirect reduction achieved, two reaction coupled to finish. Reduction of carbon containing pellet prophase, the rate of reduction is mainly composed of carbon gasification rate control, semi coke powder than coke powder anthracite powder has good reduction performance, reduction reaction are completed in one step, and the reduction of maximum rate corresponding to the temperature range than coke powder anthracite powder low above 150℃5. Reducing reaction temperature of 1250℃end. Semi-coke powder can replace coke, anthracite production of carbon pellet...