Abstract: Process for pelletizing sulphur by forming and solidifying molten droplets of sulphur containing dispersed therewithin an effective minor amount of a mechanical strength improving modifying additive, e.g. 4-10 ppm organopoly-siloxane, kerosene, other lower boiling range hydrocarbon than kerosene, or mixtures thereof, for increasing the mechanical strength of the resultant pellets, such as by contact with water as coolant, either by feeding molten droplets of or an unbroken continuous stream of the molten sulphur-dispersed additive mixture into the water, preferably at a coolant temperature operatively below that of the molten sulphur and above its own freezing temperature and at a molten sulphur-dispersed additive mixture feeding temperature of particularly optionally between about 130.degree.-140.degree. C.; and the resultant pellets of improved close grained, substantially amorphous structure thereby produced.

Abstract: Process and apparatus for solidifying molten materials by pouring onto a substrate and cooling, in which undesired crystallinity is avoided by first forming a solidified protective stabilizing skin on the melt surface, e.g. by carefully controlled air cooling or dusting with powdered material, before more vigorous cooling by fluid coolant, e.g. air or water, directed against the solidified skin. Optionally, silicone liquids and/or kerosene or other hydrocarbons of lower boiling range are used in minor amounts to treat the melt before pouring to promote the formation of amorphous solidified material and provide increased hardness on aging. When using an endless belt as substrate, the plain solidification surface may be modified by superposing a skeleton framework to form selectively shaped tablet or bar molds. The process and apparatus are particularly applicable to the solidification of molten sulphur.

Abstract: Process for pelletizing sulphur by forming and solidifying molten droplets of sulphur containing dispersed therewithin an effective minor amount of a mechanical strength improving modifying additive, e.g. 4-10 ppm organopolysiloxane, kerosene, other lower boiling range straight chain hydrocarbon than kerosene, or mixtures thereof, for increasing the mechanical strength of the resultant pellets, such as by contact with water as coolant, either by feeding molten droplets of or an unbroken continuous stream of the molten sulphur-dispersed additive mixture into the water, preferably at a coolant temperature operatively below that of the molten sulphur and above its own freezing temperature and at a molten sulphur-dispersed additive mixture feeding temperature of particularly optionally between about 130.degree.-140.degree. C.; andthe resultant pellets of improved close grained, substantially amorphous structure thereby produced.