Study On Calcining Process Of Petroleum Coke

The deterioration of petroleum coke quality poses a grave threat to the stability of carbon anode quality, and challenges the first process, calcination of carbon anode produce. In this paper, with static calcination method, the relationship among volatile, sulfur content, calcining temperature, calcining curve, calcining yield and anode quality was studied. Main research results are as follows:1) With slow heating rate under900℃, higher calcining yield was obtained, while the rate change was not so important above900℃. The calcining yield of petroleum coke with high water content and fines content decreased obviously. Moreover, under same calcining method, higher sulfur content brought both higher produce difficulties and lower calcining yield.2) There was a marked temperature inflexion on the desulfuration curve of all petroleum coke, which was always above1200℃and change with different sulfur content of green coke. Hence, desulfuration rate, no more than20%, would be low during general calcining process.3) To low-sulfur petroleum coke, proper holding time at900℃is good for its electrical resistivity and bulk density refining; And decreasing heating rate during900～1300℃is good for its real density and anti-oxidative activity improving. However, high-sulfur petroleum coke could not obtain better quality with calcining method change.4) Based on an overall consideration of all calcination facts, such as specific power consumption, equipment using period, calcining yield, calcined coke physic-chemical properties and baked anode quality, calcining temperature of1200℃was recommended more than1300℃...