Abrasion–Resistant Parts for Cat Crackers. Experience in Manufacture and Operation

Type 1A/1M, GK–3, and G–43–107 cat crackers (CC) with pulverized catalysts are important in the oil refining industry. A special feature of these cat crackers is the presence of parts subject to significant abrasive wear at 400–700°C. In the last ten years, CC have been actively revamped with the participation of the leading American firms (in Ryazan' and Yaroslavl') and domestic specialists (in Angarsk, Ufa, Lisichansk, and Turkmenbashi) to improve the process parameters. After revamping, the rate of movement of the catalyst in transport lines and cyclones and consequently the rate of abrasive wear increase, and this must be taken into consideration in designing and manufacturing CC. This article reports the experience of Aliter–Aksi CJSC in manufacturing abrasion–resistant parts obtained since the mid–1980s.