Producer
Carbide Industries LLC
American calcium carbide manufacturer (Louisville KY; private); one of very few remaining North American calcium carbide producers. Carbide Industries produces calcium carbide in electric arc furnaces using US limestone and metallurgical coke. US and Canadian calcium carbide production has collapsed since the 1970s as Chinese competition — supported by cheap coal power — made North American production economically unviable. Carbide Industries exists primarily to supply metallurgical applications (desulfurization of steel via calcium carbide injection) rather than as an acetylene feedstock, as most North American industrial acetylene is now recovered from ethylene cracker off-gas rather than synthesized from CaC2. The existence of Carbide Industries represents one of the last strands of what was once a major North American chemical industry — the US produced most of its own calcium carbide before Chinese electric arc furnaces, powered by coal at $0.03-0.05/kWh, made US production impossible at $0.15-0.20/kWh.
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Calcium Carbide (Metallurgical Grade)
70%Calcium Carbide (Acetylene Grade)
20%Industrial Services
10%
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Did you know2023
Carbide Industries supplies calcium carbide for US steel mill desulfurization (steel supply chain) AND for industrial acetylene generation (welding and cutting supply chain). US steel mini-mills (electric arc furnace steelmakers) inject calcium carbide into molten steel to remove sulfur -- a critical step in producing high-quality steel for automotive and construction applications. Industrial gas distributors and welding supply companies buy calcium carbide to generate acetylene in dissolved acetylene cylinders for welding and cutting. Both the US steel quality supply chain and the industrial welding/cutting gas supply chain depend on Carbide Industries as one of the few domestic US calcium carbide sources. A shutdown of Carbide Industries Louisville -- the last major US CaC2 producer -- would simultaneously affect steel mill desulfurization capability and US industrial acetylene supply, with Chinese imports as the primary alternative (with lead times of 6-12 weeks for delivery).
Steel Foundation ↗Origin2023
Carbide Industries represents one of the last survivors of what was once a major American chemical industry. The US calcium carbide industry peaked in the early-to-mid 20th century as the primary source of acetylene for industrial welding, cutting, and chemical synthesis. Calcium carbide requires enormous amounts of electricity ($0.15-0.20/kWh at US industrial rates) to operate the electric arc furnaces; Chinese producers, with coal-fired power at $0.03-0.05/kWh, systematically undercut every US and European calcium carbide producer through the 1990s and 2000s. Companies like Air Reduction Company, Airco, and Union Carbide (which gave Louisville its industrial carbide heritage) exited calcium carbide production as economically unviable. Carbide Industries survived by focusing on metallurgical-grade CaC2 for US steel mills -- a market where domestic sourcing preferences, short delivery lead times, and quality traceability provided value beyond the commodity price. Louisville, Kentucky became the last US calcium carbide production site because Union Carbide's Alloy, West Virginia plant (which had been a major producer) closed, leaving Louisville as the remaining option.
Carbide Industries LLC ↗