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Dry processing of coal – status update
Expanded Title:Dry processing of coal offers a number of advantages to the coal industry. No water is required to dry-process coal which is a very important consideration in a water-scarce country like South Africa. The pollution potential of dry processing is significantly lower than that of conventional coal processes since no slurry results from the process. In addition to the advantage of not requiring water, dry processing is also less expensive than conventional processing – both in terms of capital and operating costs. This makes dry processing attractive, especially for smaller coal producers. Implementation of dry processing should, however, be carefully evaluated on a per-case basis since the low separation efficiency of the process can potentially off-set the advantage of low cost. It should also be taken into account that current dry processing techniques do not work on all South African coals. Coaltech has completed a number of studies aimed at evaluating available dry processing and dry screening technologies. These studies have provided valuable know-how and assisted the local coal industry with implementation of dry processing technologies. There is, however, still a need for more efficient dry processing technologies as well as for processes capable of beneficiating small and fine coal. In this regard, Coaltech will continue with investigations starting with dry dense medium processing, a process that holds potential to effectively separate dry coal but remains to be proven in South Africa.
Date Published:25/07/2014
Document Type:Research Report
Document Subjects:Mine water - Closure and rehabilitation, Mine water - Impact prediction, Mine water - Tailings facilities, Mine water - Mine water treatment
Document Format:Report
Document File Type:pdf
Research Report Type:Standard
WRC Report No:SP 85
Authors:De Korte GJ
Project Leader:G J de Korte
Project No:SP 85
Organizations:COALTECH 2020
Document Size:913 KB
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