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Mn and Cr Extraction from the Secondary Wastes of Metallurgical Combines by Gas-Phase Conversion in Nitriding Media
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Mn and Cr Extraction from the Secondary Wastes of Metallurgical Combines by Gas-Phase Conversion in Nitriding Media
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Journal Article
Mn and Cr Extraction from the Secondary Wastes of Metallurgical Combines by Gas-Phase Conversion in Nitriding Media
2024
Overview
An approach based on the gas-phase processing of secondary wastes in an HNO
3
(vapor)–air or NO
x
–H
2
O (vapor)–air atmosphere with further Mn and Cr leaching with water is proposed for Mn and Cr extraction from the secondary wastes of metallurgical plants (fly ash from the ore-dressing plant of the Norilsk Combine and rock refuses from the Punda Gourda Nickel Production Combine of the Cuban State-Owned Commercial Caribbean Nickel Company). It is shown that the preliminary treatment of secondary wastes in a nitriding atmosphere at a temperature of 400–425 K for 5 h makes it possible to leach Mn from the volume of secondary wastes. For the fly ash from the ore-dressing plant of the Norilsk Combine and the rock refuses from the Punda Gourda Nickel Production Combine of the Cuban State-Owned Commercial Caribbean Nickel Company, the degree of Mn extraction with water is less than ~33 and ~65% of their total content in the wastes, respectively. The degree of Cr extraction is less ~2% in all cases.
Publisher
Pleiades Publishing,Springer Nature B.V
