How to produce Oxidized Bitumen (Blown Bitumen)?
Production process: 1. Bitumen heating to 265-270 °C 2. Transferring melted bitumen to blowing towers 3. Blowing air to bitumen 4. Cooling melted bitumen with water 5. Packing The procedures of producing bitumen are as follows: 1.Continuous blowing procedure 2.Discontinuous blowing procedure These two procedures are done by other two procedures named catalysis and anticatalysis . Catalysis means adding some chemical material during the process In order to decrease blowing reaction time. For the following reasons: ¨ Ease and simplicity in changing blowing condition and have production with different grades as a result. ¨ Ease in generating the unit. ¨ Ease in technology and also low expense in investment. Technical point and operating conditions are as follows: ¨ The blowing should be done from the bottom of blowing tanker. The reaction between bitumen and air is calorific .If the heat produced during the mixture is high, the heat of reaction is controlled by water injection. ¨ Admixtur
