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#cement #portland cement #kiln #aggregate #industrial byproduct

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#dioxin #TCDD #industrial byproduct #combustion #incinerator #toxic chemical #environmental toxin #hazardous emissions #pop

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#slag #molten slag #metal refining #furnace waste #rock waste #industrial byproduct

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#slag #smelting waste #furnace byproduct #metallurgical waste #glassy slag #industrial byproduct #inert waste