Effect of carbon recycle materials on properties of bench scale prebaked anodes for aluminum smelting

Effect of Coke Granulometry on the Properties of Carbon Anodes based on Experimental Study and ANN Analysis

“…However, it slightly changed with further increase in butt content. This result is in contrast with the work reported by Belitkus (Belitskus, 1981). Anode 17 exhibited lowest density that resulted highest value of ER.…”

“…Table 4 shows the effect of butt content on anode total air reactivity and dusting. The results corresponded well with those reported by Belitskus (Belitskus, 1981). The recycled butt additions seemed to increase the overall anode air reactivity due to its sodium content and the presence of other impurities such as potassium, calcium, aluminum, iron, sulfur, nickel, silicon, fluoride etc.…”

Detoxification and Recovery of Spent Carbon Cathodes via NaOH–Na2CO3 Binary Molten Salt Roasting–Water Leaching: Toward a Circular Economy for Hazardous Solid Waste from Aluminum Electrolysis

“…37,53,54 In addition, raw materials with a high graphitization degree are less reactive than the binder coke in CO 2 and air atmosphere, which further promotes the selective oxidation of binder coke. 51 These views were supported by the results of XRF analysis in Figure 8a and Raman spectroscopy in Figure 8b. The results indicated that excessive impurity content was harmful to the performance of the prepared carbon anode.…”

“…32,50 The reactivity of high graphitization aggregate is lower than that of binder coke, which accelerates its selective oxidation and increases the reaction consumption of carbon anode. 51 Figure 8c shows that the time from pitch dripping to full spreading was untreated SCC (21 s) < calcined petroleum coke (35 s) < recovered graphitized carbon (55 s). A previous study found that calcined petroleum coke was more easily wetted by pitch than graphite with a highly ordered structure.…”

“…However, a large amount of ash in untreated SCC may interfere with the bonding between the binder coke and the carbon matrix. 51 Performance of Carbon Anode Blended with Recovered Graphitized Carbon. Recovered graphitized carbon or untreated SCC was blended to prepare carbon anodes in proportions of 2, 4, and 6 wt % and compared with those prepared from petroleum coke.…”