Sawan Jasoliya

More inventory does not always mean better availability of spares. In fact, the more unnecessary inventory you have, the less likely you are to find the exact spare you need when a breakdown happens. This thought crossed my mind when I heard about the breakdown of a bucket elevator gearbox at Sebit, West Pokot plant —a place where I worked for a short time. The plant was shut down for 12 days due to the unavailability of a spare gearbox. Unfortunately, this is a recurring issue there. There was no scientific approach to procurement—just blind purchasing to save their skins. But in reality, no one can escape the consequences of poor planning. And then there’s the bigger issue: it was an old Chinese plant. After running its full life in China and being exploited to the maximum, it was sold to Devki Group, Kenya. Imagine the situation for a mechanical maintenance engineer in a plant like this—no proper manuals, no part lists, and no structured systems. Every day and every night...

Important Note: This SOP applies to all maintenance jobs except Preventive Maintenance. For complete SOP:  Click here

For cement plants that do not have advanced coal dosing systems such as Pfister, Coriolis, or Multicore, traditional coal feeding systems still dominate operations.  These include: Venturi-Based Coal Transfer and Firing System,   V1 – A successful project. FK Pump-Based Coal Transfer and Firing System, F1. FK Pump-Based Direct Coal Firing System, FD1 –  Two successful projects. Challenges in Traditional Coal Feeding Systems In these setups, coal transport starts when the coal firing bin reaches its lower limit and stops when it reaches the higher limit. However, this method introduces several challenges: SFM Draft Variation: Sudden coal transport starts and stops create fluctuations in the SFM (Solid Flow Meter) draft, leading to inconsistent feeding. Bin Pressurization & Flushing: During transport, the coal firing bin gets pressurized, causing erratic coal flushing, which disrupts stable firing. Continuous monitoring and regulating is a headache for operators. ...