... iron dru Calcium carbide is used in the gerneration of acetylene gas for welding,and as a reagent.we can ... /KG, 0.06%≤PH3 content in acetylene max.,0.1%≤H2S content in acetylene max, 7-15mm,Gas Yield≥290L/ ... KG, 0.06%≤PH3 content in acetylene max.0.1%≤H2S content in acetylene max. 15-25mm,Gas Yield≥290L/ ... KG, 0.06%≤PH3 content in acetylene max.0.1%≤H2S content in acetylene max. 25-50mm or 50-80mmGas ...