Process for treating waste slags

Chemistry of inorganic compounds – Treating mixture to obtain metal containing compound – Alkali metal

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423189, 423209, C01D 700

Patent

active

042255651

ABSTRACT:
In the treating of waste slags produced in the desulfurization and/or dephosphorization of molten pig iron with alkali carbonates, the alkali is recovered by extracting said waste slags with hot water while feeding carbon dioxide gas to form an extraction solution having a pH of 9.0-11.5 and recovering alkali carbonates from said extraction solution. The extraction solution contains little sulphur and silicates, from which alkali carbonates can be easily recovered with high yield therefrom.

REFERENCES:
patent: 3701737 (1972-10-01), Goldstein

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