Search results
Results from the WOW.Com Content Network
A preheater tower, rawmix silo and exhaust stack. Bottom left: rawmill. Bottom right: rotary kiln with tertiary air duct above. The U-shaped duct leading from the kiln inlet is an "alkali bleed". A typical process of manufacture consists of three stages: grinding a mixture of limestone and clay or shale to make a fine "rawmix" (see Rawmill);
This requires gas-tight seals at either end of the kiln. The exhaust gas may go to waste, or may enter a preheater, which further exchanges heat with the entering feed. The gases must be drawn through the kiln, and the preheater if fitted, by a fan situated at the exhaust end.
Schematic diagram of typical coal-fired power plant steam generator highlighting the air preheater (APH) location. An air preheater is any device designed to heat air before another process (for example, combustion in a boiler), with the primary objective of increasing the thermal efficiency of the process.
Instead of decommissioning the plant, the owners expanded it by one-third in 1961, and it has since become the main source of cement for northern Arizona and Phoenix. In 2002, the company added a new kiln system and a 418-foot (127 m) tall pre-heater tower, and since then has upgraded the plant in other ways. Company officials estimate that the ...
A raw mill is the equipment used to grind raw materials into "rawmix" during the manufacture of cement. Rawmix is then fed to a cement kiln, which transforms it into clinker, which is then ground to make cement in the cement mill. The raw milling stage of the process effectively defines the chemistry (and therefore physical properties) of the ...
With an increasing market share, Kiln 8 was designed and built in the mid-1980s. At a cost of £70m, the kiln is 68m long and the preheater tower is around 80m high. Two large stores with capacity of 43,000 and 10,000 tonnes each were constructed to enable storage of raw materials to feed the kilns.
A concrete plant, also known as a batch plant or batching plant or a concrete batching plant, is equipment that combines various ingredients to form concrete. Some of these inputs include water , air, admixtures , sand , aggregate ( rocks , gravel , etc.), fly ash , silica fume , slag , and cement .
Ohorongo Cement is a cement factory on farm Sargberg near Otavi in the Otjozondjupa Region of Namibia. It is one of two Namibian cement factories and has a production capacity of 0.7 Mt (690,000 long tons; 770,000 short tons) per annum. [1] The ground breaking ceremony for the construction of the plant was held in January 2009. [2]