Number |
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741 |
Crushers, Grinders and Mixers | Workers in this unit group crush, grind, mix and blend chemicals and other materials employed in chemical and related processes. Their functions include: reducing solid chemicals and related materials to suitable size for further processing; grinding and pulverising solid chemicals and related materials; mixing or blending solids or liquids used in chemical and related processes; performing related tasks.Operators of crushing machines employed in ore-treating are classified in 7-12.30. |
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742 |
Cookers, Roasters and Related Heat Treaters | Workers in this unit group perform cooking, roasting and other heattreating tasks in chemical and related processes. Their functions include: cooking materials to purify, mix or compound them, give them a special property or effect a chemical change in them; heating substances in ovens, kilns or similar devices to dry them, give them a special property or effect a chemical change in them; operating driers for the processing of chemicals and related materials; performing related tasks. |
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743 |
Filter and Separator Operators | Workers in this unit group operate devices to filter and separate chemicals and related materials. Their functions include: operating filtering devices in which solutions are forced under pressure through a filtering unit; operating filtering devices in which solutions are vacuum-drawn through filtering media fitted to a rotating drum; operating machines which separate substances by centrifugal force; operating chemical, electrical or centrifugal equipment at oil well sites to remove sediment and water from crude oil; performing related tasks. |
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744 |
Still and Reactor Operators | Workers in this unit group distil and refine chemicals (except petroleum). Their functions include: operating batch or continuous stills in which crude liquid chemicals are treated to separate them into, or to refine, their chemical constituents; operating equipment which performs a sequence of operations in a chemical reaction process; operating evaporating tanks, vacuum pans or similar devices to concentrate solutions and suspensions; operating digesters at wood-felling sites to obtain crude turpentine from wood chips by steam distillation; performing related tasks. |
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745 |
Petroleum-Refining Workers | Workers in this unit group refine, distil and treat petroleum and petroleum products. Their functions include: operating plant to remove sulphur from petrol and petroleum products; operating pumps to circulate petroleum products, water and chemical solutions through refiner; operating stills to distil or refine petroleum products; operating control panels in petroleum refinery; operating equipment to blend petrol with chemicals and other additives; operating filter presses to separate oil of paraffin distillate from paraffin wax; performing related tasks. |
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749 |
Chemical Processors and Related Workers Not Elsewhere Classified | Workers in this unit group perform tasks in chemical and related processing not classified elsewhere. Their functions include: treating chemical solutions with bleaching reagents; operating ovens and furnaces to make coke or coal-gas; operating kilns to make charcoal; operating equipment to make synthetic fibres; operating chemical equipment to separate and extract radioactive materials from their ores; performing other tasks in chemical and related processing. |
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