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METHOD OF UTILIZATION OF GALVANIC PROCESS SLUDGE
METHOD OF UTILIZATION OF GALVANIC PROCESS SLUDGE
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机译:电镀工艺污泥的利用方法
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摘要
FIELD: utilization of galvanic process sludge. SUBSTANCE: proposed method includes stages of leaching, regeneration, filtration and decontamination; prior to leaching, sludge is subjected to galvanic activation by water at high pressure, up to 15 Mpa; leaching of copper, nickel and zinc is performed in succession in one apparatus first with hydrochloric acid solution at concentration of 0.3-0.5 m/l and then in ammonia chloride solution of the composition, m/l: 0.3-0.5 NH4Cl + 3.0-4.0 NH4OH, which is formed at addition of excessive ammonia water into first solution. Proposed method ensures content of admixtures in separated metals. EFFECT: enhanced efficiency; waste-free process. 2 cl, 1 dwg
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