1. National Seminar on “Coal Preparation & New Coal Washing Techniques” at IICM during December 3-4, 2010. kalyan sen, former Director, CFRI-cum-CMRI, Dhanbad. Director, CTec Pvt. Ltd. Kolkata & Chandan Das, CTec

2. Pilot Plant Investigation  Why at all do we need this? Why at all do we need this?  Criteria for an ideal Pilot Plant Criteria for an ideal Pilot Plant Role of a consultant in designing a washery  Why a Consultant? Why a Consultant? Conclusion

3. Why at all do we need this? To optimize the slurry circuit for preparation of coal, particularly from virgin seams. To know the Particle size distribution of ROM, crushed, degraded coal and fines generatedParticle size distribution degraded To confirm the computer predicted results for practically achievable yield of cleans at a certain parameter of cut and/or Ash% To determine the optimum size of screens, considering the kinetics of screeningkinetics of screening Optimum quantity of water spraying during deslimming, rinsing, etc. Sufficient washed coals for downstream trials, like combustion study, characteristics of ash forming minerals e.g. ash erosion, clinkering, agglutinating, etc. Contd…. Contd…. Contd….

4. Choice of a suitable crusher Choice of a suitable screen of particular type and size Finalization of type and size of washer Optimum parameters and the range of variation for washing parameters Choice of flocculants, etc. and rheological properties of thickened slurry To overcome the limitations of testing lab to deliver the above said pointslimitations Back to ContentBack to Content

5.  Stability of the coal handling equipment e.g. Bunkers, Feeders, Chutes, Conveyors, Load out stations, etc.  To collect the requisite amount of sample (as per IS / ISO) without jeopardizing the system.  Minimum capacity of a pilot plant depends on the Top Size of coal viz. 40tph for -100mm, 2-3tph for -3mm feed, etc. Minimum capacity Back to content

6.  Providing economically viable profitable solution to the optimum washery design problem.profitable solution Next

7.  They know the subject in depth  They know all the angles  They know all the authorities  They know the laws on pollution and they know the means of solving the particular problem.  They spare you from studying a phase of engineering which is not your domain.  They know where to go to get any information needed, which will help them solve the problem. Back to Content

8. Learn your mistakes in a pilot plant Earn your profits in a commercial plant