Calcium carbide or common language carbide produced in an electric furnace based on chemical reactions:
CaO + 3C → CaC2 + CO - 108000 calories
which is a reversible reaction and requires heat (endothermic). The raw materials used are CaO (burnt lime) and carbonization materials (hard coke, anthracite coal, petrolium coke, charcoal). With certain chemical properties and ratios, calcium carbide will be produced (CaC2) which is high quality.
Specification Burnt lime is produced from limestone of a certain size (30-60mm) in a vertical kiln with a capacity of 80 tons/day, through direct combustion using natural gas. Freshly processed burnt lime is sent via conveyor belt to 2 burnt lime storage tanks, after going through filtration to separate small limestone (less than 6mm). Some of the carbonation ingredients used are hard coke with a size of 5-25mm. Coke is also sent via conveyor belt into 2 capacity coke storage tanks 45m3. After weighing, the burnt lime and coke which have been mixed together are sent from the day bin to the electric kiln (kiln). Then this mixed material is fed into the electric furnace as needed through a charging funnel. A mixture of burnt lime and coke is melted in an electric furnace at high temperatures, ie 2.000 - 2.100oC into a liquid form of calcium carbide.
This electric furnace is equipped with 3 tapping holes. The molten carbide is tapped from the tapping hole every 1 hour sequentially. Hot carbide is stored in lorries with a capacity of 1,300 kg. After cooling for 16 hours, the carbide lumps are broken into pieces and packed in steel drums measuring 0-2, 2-4, 4-30 and 30-80 mm.
Specification
MDQ carbide from PT Emdeki Utama Tbk is packaged in steel drums with a capacity of 100 kg (net), which are designed to be sealed efficiently and capable of being stored for long periods of time. To guarantee timely delivery of carbide to buyers, our factory is equipped with a high-speed drum making machine capable of producing 800 drums/day. The design and size of the drum are adjusted using Japanese measuring standards. For export purposes, MDQ drums have international standards
(United Nation's standards for dangerous cargo packing)
for packaging dangerous goods.
Power Supply
To support carbide production activities, very high power electricity is needed. In this framework, PT Emdeki Utama Tbk consumes more than 100 million kwH of electricity per year which is supplied directly by PLN with a power of 17.5 MVA (15.5 MW).
Apart from that, PT Emdeki Utama Tbk also has a Combined Cycle Power Plan (CCPP) with a capacity of 16.5 MW which uses advanced technology using natural gas via pipe directly from the source. This CCPP was designed and built by Siemens. With sufficient electrical power, production activities can continue without stopping, thereby ensuring the availability of carbide for consumers.