Cement Kilns

Drogheda

Location:

  • Grid reference:
    • ITM 710999,775962
    • old style O1109875966
  • 53°43'17"N; 6°19'0"W
  • Townland: Newtown Stallaban, Drogheda, County Louth

Clinker manufacture operational: 1938-1977

Approximate total clinker production: 13.8 million tonnes (30th)

Raw materials:

  • Carboniferous Limestone (Milverton Group: 328-340 Ma) from quarries at 707300,776300, transferred by aerial ropeway around the northern suburbs of the town (3.6 km).
  • Silurian shale (423-426 Ma) from quarry at 706500,777800, moved by road to the limestone quarry, crushed, and by ropeway to the plant

Ownership:

The company was begun as a joint venture between the Eire government and Tunnel/FLS. Tunnel’s participation was conditional upon the government’s imposition of sufficient import duties on cement to prevent any effective competition. This and the Limerick plant were nominally started up on the same day, allegedly by a start button, connected by telegraph! The plant was replaced by the nearby Platin plant, cement manufacture being ended when the large Platin A2 kiln was commissioned. The plant had excellent wharf facilities allowing reasonably large vessels to unload cheap coal and to deliver cement to the coastal cities. In addition, the plant had from the outset a purpose-built 2.3 km spur which allowed easy rail communication with Dublin (55 km). The plant remained in operation (under new ownership) for sea-water magnesia production, with the result that it was still more or less intact in 2009.

Rawmills

Crushed limestone and shale were initially inter-ground in a FLS 930 kW ball mill. Subsequent similar mills were added as kilns were added.

Three rotary kilns were installed:

Kiln A1

Supplier: FLS
Operated: 29/04/1938-1976
Process: Wet
Location:

  • hot end (cooler ports): ITM 710933,775957 {old style 311032,275961}
  • cold end: ITM 711058,775985 {old style 311157,275989}: hot end only enclosed.

Dimensions (from cooler ports): metric 129.00 × 3.600B / 3.300C / 3.600D
Rotation (viewed from firing end): clockwise
Slope: ?
Speed: ?
Drive: ?
Kiln profile (from cooler ports): -3300×3600, 43000×3600, 45000×3300, 95000×3300, 97000×3600, 127700×3600, 127700×3150, 129000×3150: Tyres at 4000, 17500, 36750, 57750, 79500, 100250, 122000.
Cooler: Unax planetary 10 × 6.50 × 1.200
Fuel: Coal, except Oil during the 1960s
Coal Mill: semi-indirect: Tirax ball mill
Exhaust: ID fan direct to stack: Lodge Cottrell electrostatic precipitator added 1940.
Typical Output: 460 t/d
Typical Heat Consumption: 7.3 MJ/kg


Kiln A2

Operated: 1/1941-1976
Location:
  • hot end (cooler ports): ITM 710935,775947 {old style 311034,275951}
  • cold end: ITM 711061,775975 {old style 311160,275979}: hot end only enclosed.

Kiln profile (from cooler ports): -3300×3600, 43000×3600, 45000×3300, 90250×3300, 92250×3600, 127700×3600, 127700×3150, 129000×3150: Tyres at 4000, 26500, 49500, 72000, 96000, 120250.
Exhaust: ID fan through Lodge Cottrell electrostatic precipitator.
Typical Output: 465 t/d
Typical Heat Consumption: 7.35 MJ/kg
Identical in all other respects to A1


Kiln A3

Operated: 1954-24/12/1977
Location:
  • hot end (cooler ports): ITM 710937,775938 {old style 311036,275942}
  • cold end: ITM 711070,775968 {old style 311169,275972}: hot end only enclosed.

Dimensions (from cooler ports): metric 136.00 × 3.600 / 3.300 / 3.600
Kiln profile (from cooler ports): -3300×3600, 43000×3600, 45000×3300, 90250×3300, 92250×3600, 134700×3600, 134700×3150, 136000×3150: Tyres at 4000, 26500, 49500, 72000, 97250, 124750 ?
Exhaust: ID fan through Lodge Cottrell electrostatic precipitator.
Typical Output: 490 t/d
Typical Heat Consumption: 7.2 MJ/kg
Identical in all other respects to A1



Sources: Pugh, p 112: “New Cement Works in Eire”, Cement and Lime Manufacture,Vol 14, p 79 (1941): Pat Gray, Forty Years by the Boyne, Drogheda Independent Co., Ltd, 1979: Irish Cement 1938-1988, CRH plc, 1988



© Dylan Moore 2011: commenced 22/01/2011: last edit 31/12/2016.

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Drogheda Detail

Approximate capacity: tonnes per year
Drogheda Capacity