... -4mm,4-7mm,7-15mm,15-25mm,25-50mm,50-80mm Gas Yield:295L/KGPackage: 50KG,100KG Iron DrumCapability of Containers ... crystalline compound obtained by heating pulverized limestone or quicklime with carbon and used to generate acetylene gas,as a dehydrating agent ... is used for metal cutting and welding. Calcium Carbide 50-80mm