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Thread: Hig Heaping Euipment

  1. #1
    Author Guest

    Hig Heaping Euipment


    I am N.Ramakrishnan, Senior Manager Production for a fertiliser unit in South India. We are manufacturing a complex fertiliser with 16:20 grade with Ammonia , Sulphuric and Phosphoric acids.

    In the process we handle rock phosphate at one stage which is stored in a silo. We bring rock from the nearby Chennai Harbour ,by trucks and the trucks unload the material into the silo. Wr use shovels to heap the material and we store about 10000 mt of rock in the silo. Rock is stored in a trapezoid form of about 2 m high and much space is left above the heaps.

    I would lke to know what methods can be used to make the heap bigger by discharging the material from the top. Though the silo roof can accoodate a conveyor , we have limited space for unloading the rock. I would like to know whether some other densephase conveying systems can be used for unloading the rock phosphate from trucks directly.

    Cost is another factor in this project. We can save some money by high heaping and our management looks at projects with a high rate of return in the range of 25-30 % .

    Can you advise us on the methods to do the high heaping ?

    Finally I thank you for keeping me informed of the latest in Solids handling



  2. Dear Mr. N Ramakrishnan,

    There are many means, from average to sophisticated, from manual to automatic, from cheap to expensive; for stacking & reclaiming operation of the rock phosphate described in your message. However, all this depends upon site layout, probable budget etc. So, it is difficult to give you specific suggestion based on the aforesaid information.

    Ishwar G Mulani.
    Advisor (Consultant) for Bulk Material Handling Systems.
    Author of Book : Engineering Science and Application Design for Belt Conveyors.
    Email :

  3. #3
    Conjoint Professor Gary James

    Conjoint Professor Gary James

    Bulk Solids Handling Specialist

    Emtek (Pty) Ltd.

    Emtek (Pty) Ltd.

    Consider an Air Structure.

    If the material must be stored out of the weather, consider an air structure.

    Here is one reference.

    There are others.

    You could feed the material via a conveyor through a simple valve. Say hopper & feeder.

    The figure I was quoted a few years ago was $US 11 per square foot.

    They can have airlocks to allow trucks, front end loaders to access.

    Best Regards

    Gary James
    Bulk Handling Innovation

  4. #4
    Conjoint Professor Gary James

    Conjoint Professor Gary James

    Bulk Solids Handling Specialist

    Emtek (Pty) Ltd.

    Emtek (Pty) Ltd.

    Consider and Air structure

    A few years ago I was quoted a figure of $US11 per square foot

    Enter the structure by a conveyor at the top, via a simple valve

    Here is one supplier. There are others

    Best Regards

    Gary James
    Bulk Handling Innovation

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