Magnetic separation of mineral matter from coal liquids. Final report
| Autor: | L.M. Levinson, E. Maxwell, Israel S. Jacobs, David R. Kelland |
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| Rok vydání: | 1978 |
| Předmět: | |
| DOI: | 10.2172/6502977 |
| Popis: | The earlier study of the magnetic separation of mineral matter from coal liquids reported in EPRI Report AF-508 has been carried forward with significant improvements in the technique and results. Treatment of the dry residual filter-feed solids with appropriate H/sub 2//H/sub 2/S atmospheres has increased the magnetization of the solids by an order of magnitude. A parallel treatment of the wet filter feed in autoclave studies has successfully upgraded the magnetization of the suspended solids at process operating temperatures with a corresponding increase in the magnetic separability of solids which were originally in a low magnetization state. The investigation indicates that it should be possible to separate all the sulfide and other magnetic solids by employing a H/sub 2//H/sub 2/S gas treatment stage at a temperature intermediate between that of the liquefaction stage and the preferred magnetic separation state at 430/sup 0/F. Preliminary tests with a chemical flocculant are encouraging and suggest the possibility of more complete removal of the non-magnetic solids by agglomeration with the magnetic solids. No velocity dependence was detected below 6.8 cm/s flow velocity. It is estimated that 36 grams of filter-feed per gram of matrix can be handled before breakthrough. |
| Databáze: | OpenAIRE |
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