Shaft kilns Question 1
I used to be in Africa and was involved in helping a local factory with a production of 1000tpd. However in my opinion this was too much. I would thus like to know which is the cheapest option of setting up a smallest cement factory in the Central African region.
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Re: Shaft kilns
The cheapest option to set up a cement factory in Africa would probably to use shaft kiln technology. However it depends what you mean by cheap. With a shaft kiln you will save on the kiln technology compared with a rotary kiln but you will still have all the costs for quarrying, crushing grinding and packing. It will still cost millions of dollars.
Shaft kilns Question 2
The NCB (National Council for Cement & Building Materials) in India publishes a number of Technology Digests, Monographs & Research Bulletins. At least 10 of these relate to vertical shaft kiln technology. Unfortunately I can't tell you which is the best. I would pick either Technology Digest 25, "CRI vertical shaft kiln mini cement plant technology", or Technology Digest 32, "CRI modern vertical shaft kiln cement plants".