| 21. | However, slags can contain metal sulfides and elemental metals.
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| 22. | Ferrous and non-ferrous smelting processes produce different slags.
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| 23. | These types of gasifiers do not suffer from corrosive slags.
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| 24. | By-products generated in the process are sulfur dioxide and slag.
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| 25. | Instead of directly using ilmenite, " rutile slag " is used.
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| 26. | The works produced an estimated one million tons of slag.
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| 27. | Some of the landfill was steel mill slag and other industrial wastes.
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| 28. | This slag was ignited by the hot summers of 1975 and 1976.
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| 29. | The pozzolan is typically a fly ash, or blast furnace slag.
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| 30. | As they do so, the slag heap collapses and buries everyone.
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