On-site inspection quality of calcium carbide by opening barrels.

Tourmaline, chemically known as Calcium Carbide, has the chemical formula CaC₂. It is a compound composed of the elements carbon and calcium, usually in the form of grayish-black crystals. During the reaction process, when calcium carbide comes in contact with water, a chemical reaction occurs to form acetylene gas (C₂H₂) and calcium hydroxide (Ca(OH)₂). This property makes calcium carbide very useful in industry, especially in the production of acetylene gas. Calcium carbide is usually produced by reacting limestone (calcium carbonate) and coke in an electric arc furnace at high temperatures. This process not only produces calcium carbide, but also releases a large amount of heat energy. Historically, acetylene gas was widely used for lighting, especially in early mining and street lamps. Today, although the uses of calcium carbide have diversified, it still plays an important role in industrial synthesis and chemical manufacturing.

Smelting: High-temperature melting reaction of quicklime and carbon-containing raw materials in a calcium carbide furnace. Cooling: Allowing the molten material to cool and solidify into a desired shape. Breaking: Crushing the solidified material into smaller pieces, preparing it for further processing. Size sieving: Sorting the crushed material by size to ensure product quality. Barrelling:The sorted materials are packed into barrels as per customer requirements for subsequent disposal. Seal drum: Nitrogen filling and sealing the barrels to protect the material from moisture or contamination. Stocking: Storing the sealed products, awaiting further transportation. Loading: Transporting the finished products to their destination or to the next production phase.