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Owner of data set CEMCOR Ltd |
Technical purpose The cement is manufactured at the Cemcor cement factory at Cookstown, Co. Tyrone, Northern Ireland, in accordance with B.S. EN 197-1:2011, Compositions, specifications and conformity criteria for common cements.
The main material components of the cement are clinker, ground limestone and gypsum. A small amount ofbypass dust is added as well as a chromate-reducing agent to the cement. A grinding aid is also added to assist in the grinding process. The clinker comprises the firing of the following products in the kiln at 1,500°C: limestone, shale, flue dust, gypsum with small amounts of iron oxide.
A1. Raw materials supply
The main raw materials for the clinker are limestone and shale. The main raw materials for the cements are clinker, finely ground limestone, gypsum, and minor additional constituents (inorganic, comprising no more than 5% of the cement).
A2. Transport
This module covers the impacts of the transport of the raw materials and fuels to the production site.
A3. Manufacturing
The main raw materials for clinker, limestone and shale are quarried on site, crushed to smaller sizes and mixed to create a homogenous mix. These are then pre-heated before being fed into the cement kiln., where they are burned with a mixture of coal, fuel oil, and alternate fuels. The material that emerges from the kiln is clinker. The clinker is then cooled and transported by conveyor belt to the clinker store, and from there to the cement mill, for grinding to the final cement, with other constituents. The cement mill grinds the clinker and additions as the mill rotates on its horizontal axis. The clinker is inter-ground with the limestone and gypsum additions, and other minor additional constituents, chromate-reducing agents, and a grinding aid (to increase grinding efficiency). |
