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The cement industry manages the 'Cement furnace Waste Use and Management Standards' with Ministry of environment in accordance with the Enforcement Rules of the Waste Management Act (2011.9.27).
*We do not use designated waste except for waste absorbent agents that absorb animal and vegetable oils.

Heavy Metal Criteria for Waste Used

(Unit: ppm, kcal/kg)

It is a description of heavy metal standards for waste used. It includes Division, Pb, Cu, Cd, As, Hg, Cl, and low heating value
Division Pb Cu Cd As Hg Cl Low calorific value
substitution
Raw
iron <1000 <3000 <60 <500 <2 - -
Other <150 <800 <50 <50 <2 - -
Alternative <200 <800 <9 <13 <1.2 <2% >4500
  • 1. Recycling products are excluded from the application of this standard.
  • 2. The following standards apply to slag generated from the smelting factory among iron substitute ingredients:
    (Pb<3,200㎎/㎏, Cu<10,000㎎/㎏, Cd<100㎎/㎏, As<900㎎/㎏, Hg<2㎎/㎏)
  • 3. Pb< 7,000㎎/㎏ and Cu< 14,000㎎/kg shall be applied to slag generated from zinc smelting factory among iron substitute ingredients.
    The rest of the items apply the same criteria as the iron substitute.
  • 4. Pb< 4,000㎎/kg, Cd< 100㎎/kg, for iron-containing byproducts generated from collection facilities among steel substitute raw materials,

*All wastes are used only when the criteria are met by conducting a preliminary investigation into the characteristics of heavy metals.