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Technology Profile: Calcium Carbide Production from Limestone

By Intratec Solutions |

This column is based on “Calcium Carbide Production from Limestone – Cost Analysis,” a report published by Intratec. It can be found at: www.intratec.us/analysis/calcium-carbide-production-cost. Calcium carbide is the most industrially relevant carbide because of its important role as the basis of the acetylene industry. In locations where there is a shortage of petroleum, calcium carbide is used as the starting material for the production of acetylene, which, in turn, can be used as a building block for a range of organic chemicals, such as vinyl acetate, acetaldehyde and acetic acid. Figure 1. The process diagram shown here outlines a process for the production of calcium carbide from limestone[/caption] The process The following describes a process for calcium carbide production from limestone and coke (Figure 1). Feed preparation. Initially, coke is dried with hot air in a tray dryer to reduce moisture in the coke. After drying, the coke is transferred to the electric furnace. Limestone is crushed in a jaw crusher into a uniform particle-size range. Some gross impurities originating from the limestone are separated in a screener. Lime kiln. The crushed limestone is calcined in a vertical-shaft lime kiln. The calcium…
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