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    • 7. 发明专利
    • Treatment of dust
    • 治疗粉尘
    • JPS59170225A
    • 1984-09-26
    • JP4148883
    • 1983-03-15
    • Nippon Mining Co Ltd
    • TOMITA MASATOSHIASANO HIDEAKI
    • C22B11/06B03C1/00B03C1/015C22B7/02C22B11/00C22B13/00C22B19/30
    • B03C1/015
    • PURPOSE:To separate and recover Fe, Zn, Pb and Ag at a high yield by subjecting iron and steel dust contg. Zn, Pb, Ag, etc. to a leaching treatment using sulfuric acid, a wet magnetic sepn. treatment, an alkali treatment and a chlorination treatment. CONSTITUTION:Dust contg. 15-40% Zn, 10-30% Fe, 1-6% Pb, 4-15% Cl, 0.1-0.5% F, 0.005-0.030% Ag, etc. is first treated with a sulfuric acid soln. of 2-4pH to leach 50-70% of the Zn contained therein. The dust is again treated with the sulfuric acid of 10-300g/l concn. to leach the remaining Zn of a zinc ferrite type in the 2nd stage. The Cl and F in the dust are leached away by >=(90-95%) by such operation. The residue of the leaching is then subjected to a wet magnetic sepn. to separate away the Fe-component contained therein and thereafter the remaining nonmagnetic material is treated with an alkali to leach and recover Pb. The residue is treated with CaCl2 and the Ag contained therein is recovered in the form of AgCl.
    • 目的:通过对铁和钢粉尘进行高收率分离和回收Fe,Zn,Pb和Ag。 Zn,Pb,Ag等进行浸出处理,使用硫酸,湿磁性分离器。 处理,碱处理和氯化处理。 构成:防尘 首先用硫酸溶液处理15-40%Zn,10-30%Fe,1-6%Pb,4-15%Cl,0.1-0.5%F,0.005-0.030%Ag等。 的2-4pH浸出其中含有的50-70%的Zn。 灰尘再次用10-300g / l浓度的硫酸处理。 在第二阶段浸出锌铁氧体类型的剩余Zn。 灰尘中的Cl和F通过这种操作被淋洗掉≥=(90-95%)。 然后将浸出的残渣进行湿式磁力分离。 将其中含有的Fe成分分离出来,然后用碱处理剩余的非磁性材料浸出并回收Pb。 残余物用CaCl 2处理,其中所含的Ag以AgCl的形式回收。