Title ID 1445Collection ID275
Title[I.M.C.C. Mines; Noralyn Air Plant]
Date[ca. 1946 - 1951]
CollectionH A Voss
ThemeWorking Life
KeywordsIndustry Labour Trades
LocalPolk County
NationalUnited States North and Central America
ProductionH A Voss
CameraH A Voss
FormatColour Silent
Duration11 min. 53 sec.
Copyright & AccessCopyright restrictions apply, contact Screen Archive South East for details


This film depicts the workings of a postwar phosphate processing plant. Mined phosphate rock deposits are separated from the surrounding silt and slurry, and packed for transportation.


The initial title explains what will be seen in this film of the workings of a phosphate mine: "Flotation equipment, conveyors to wet phosphate dump, dryer and dry phosphate storage bins". The flotation process mentioned here was one stage in the processing of phosphate rock which the I.M.C.C. pioneered, whereby very fine particles of phosphate rock, which would previously have been discarded after the initial sifting, can be separated from the surrounding sand and silt, greatly increasing the yield. The phosphate thus collected would then be dried and stored.

The film begins with a view of the processing plant from its grounds, before cutting to another shot of a plant, where the transportation of phosphate rock, in carts running along railway tracks, can be seen. The next shot overlooks large ponds in the grounds of the plant, where the water used in the processing is stored and the clay slurry separated from the phosphate rock is pumped, to settle before the clear top water can be reused in the plant. The camera then pans across to the nearby machinery. Storage tanks are filmed, before footage of the plant's machinery at work, processing slurry (this is probably the first stage after sifting, the hydroseparator - a large settling tank to 'deslime' the phosphate and sand particles, which settle as the clay overflows and is pumped away). The clay run-off is then seen pouring into a settling pit. Conveyor belts are then filmed transporting phosphate rock into the plant for the flotation process. Shots of the plants' storage tanks follow before panning across to the construction which houses the conveyor belt, spanning the perimeter of the plant. Inside, the next shot is a close-up of the belt. Outside, another construction on stilts, like that housing the conveyor belt, is filmed, though this time there is a run-off of material which pours down from it. A long shot takes in the whole of the plant, before shots of a large rotating tank, part of the flotation process. More long shots of the plant and its grounds follow, before the railway carts are again seen transporting their loads.

This film is a continuation from another by Mr Voss, [I.M.C.C. Mines: Hydrogen] (id 1459).