Magnetic separation and thermo-magneto-chemical properties of coal liquefaction mineral participates
✍ Scribed by Emanuel Maxwell; David R. Kelland; Israel S. Jacobs; Lionel M. Levinson
- Publisher
- Elsevier Science
- Year
- 1982
- Tongue
- English
- Weight
- 991 KB
- Volume
- 61
- Category
- Article
- ISSN
- 0016-2361
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✦ Synopsis
Sulphide solid particulates have been successfully separated from solvent-refined coal (SRC) liquid streams by high-gradient magnetic separation (HGMS) preceded by a sulphidation pretreatment in an H,S-rich gaseous atmosphere. This pretreatment is derived from studies of the properties of dry sulphide residual liquefaction solids, treated in an atmosphere of various H2/H2S compositions, Procedures have been devised for promoting rapid conversion of the weakly magnetic hexagonal pyrrhotites to the more strongly magnetic monoclinic form at a temperature intermediate to those of the SRC dissolver and the magnetic separation stage.