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This paper describes a rapid, simple technique for solubilizing a wide range of materials such as ores, sinters, slags, ferro-alloys, and other reagents and additives used in integrated steel making operations including environmental dusts and particulate matter. The procedure involves fusion of the specimen with sodium peroxide, or with a sodium peroxide-sodium carbonate mixture in a zirconium or virtreous carbon crucible. Treatment of the fused melt with water and acid yields a clear solution. It avoids the tedious operations involved in solubilizing residues left by other dissolution techniques. Losses of normally volatile elements, such as arsenic, phosphorus, lead, and zinc, do not occur. Solutions obtained by this procedure may be analyzed by a wide range of methods (for example, atomic absorption spectroscopy, photometry, redoximetric, or complexometric titrations or gravimetry) for such elements as aluminum, arsenic, calcium, chromium, copper, iron, magnesium, phosphorus, manganese, lead, titanium, vanadium, and zinc, at concentrations from trace to major. Numerous examples of methods developed employing the dissolution technique are cited, with data on accuracy and precision, to demonstrate the wide range of usefulness of the technique. Combined with automated instrumental methods such as DC and inductively couple plasma spectrometers for solution analysis, this procedure offers an attractive alternative to purely physical methods of analysis, which are often subject to matric interferences.
analysis, steels, slags, sinter, iron ore, ferro-alloys, sludge, environmental, industrial hygiene, gravimetry, redoximetric, complexometric, photometric, atomic absorption, fusion, solution, aluminum, arsenic, calcium, chromium, copper, iron, lead, magnesium, manganese, phosphorus, silicon, titanium, vanadium, zinc
Supervisor, Corporate Analytical Chemistry, Stelco Inc., Hamilton, Ontario