富氧侧吹熔炼处理电子废料回收有价金属中试研究

Pilot-scale Test for Recovering Valuable Metals from WEEEs by Oxygen-enriched Side-Blown Smelting

在炉床面积3.6 m2富氧侧吹熔池熔炼炉上进行了电子废料熔炼回收有价金属的中试试验,投料速度1.04~2.30 t/h,熔炼区供氧浓度65.80%~66.11%,烟化区供氧浓度31.96%~36.32%,产出炉渣Cu、Au、Ag含量分别为0.11%、0.20 g/t、1.00 g/t,合金中有价金属Cu、Au和Ag回收率分别为98.43%、97.58%和99.27%,相应的渣型组成为:CaO/SiO2=0.33~0.41、Fe/SiO2=0.07~0.14、Al2O3含量11.33%~12.77%。试验结果表明,采用富氧侧吹熔池熔炼处理电子废料可以高效回收其中铜、金、银等有价金属。

A pilot test was carried out to recover valuable metals from WEEEs in an oxygen-enriched side-blown smelting furnace with total bed area of 3.6 m2.Content of Cu,Au and Ag in slag is 0.11%,0.20 g/t and 1.00 g/t respectively with recovery rate of Cu,Au and Ag of 98.43%,97.58%and 99.27%,respectively under the conditions including feed rate of solid of 1.04-2.30 t/h,concentration of oxygen gas in smelting zone of 65.80%-66.11%,and concentration of oxygen gas in fuming zone of 31.96%-36.32%.CaO-SiO2-Al2O3 slag system containing some FeO for smelting process is appropriate under the conditions of CaO/SiO2=0.33-0.41,Fe/SiO2=0.07-0.14,and Al2O3 content of 11.33%-12.77%.The test results demonstrate that WEEEs can be processed effectively by oxygen-enriched side-blown smelting technology.