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首页> 外文期刊>Ecological restoration >X-ray fluorescence sorting of non-ferrous metal fractions from municipal solid waste incineration bottom ash processing depending on particle surface properties
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X-ray fluorescence sorting of non-ferrous metal fractions from municipal solid waste incineration bottom ash processing depending on particle surface properties

机译：从城市固体废焚烧底灰处理的非黑色金属馏分的X射线荧光分选取决于颗粒表面性质

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摘要

A heavy non-ferrous metal fraction (< 50 mm) of municipal solid waste incineration bottom ashes from wet-mechanical treatment was separated by screening, magnetic separation and eddy-current separation into ferrous metals, non-ferrous metals and residual sub-fractions. The non-ferrous metal fractions were divided and subjected to (i) a washing process, (ii) dry abrasion and (iii) no mechanical pre-treatment to study the effect of resulting different surface properties on a subsequent X-ray fluorescence sorting into precious metals, zinc, copper, brass, stainless steel and a residual fraction. The qualities of the X-ray fluorescence output fractions were investigated by chemical analyses (precious metal fraction and the residual fraction), pyrometallurgical tests and subsequent chemical analyses of the metals and slags produced by the melting processes (zinc, copper, brass and stainless steel fraction). Screening directs brass and stainless steel primarily into the coarser fractions, while copper and residual elements were rather transferred into the finer fractions. X-ray fluorescence sorting yielded zinc, copper, brass, stainless steel and precious metals fractions in marketable qualities. Neither a negative nor a positive impact of mechanical pre-treatment on the composition of these fractions was identified. Solely the yield of the brass fraction in the grain size 16-20 mm decreased with increasing mechanical pre-treatment. The pre-treatment also had no impact on yield and quality of the products of pyrometallurgical tests.
机译：通过筛选，磁性分离和涡流分离成铁金属，有色金属和残余亚级分离，将来自湿法机械处理的重型有色金属废物滴底底部灰晶片，有色金属和残留亚级分离。将非黑色金属级分分为（i）洗涤方法，（ii）干磨损和（iii）无机械预处理，以研究在随后的X射线荧光分选中产生不同的表面性质的效果贵金属，锌，铜，黄铜，不锈钢和残留级分。通过化学分析（贵金属级分和残留级分），Pyrome冶金试验和随后由熔化方法产生的金属和炉渣的化学分析来研究X射线荧光输出级分的质量（熔化方法（锌，铜，黄铜和不锈钢）分数）。将黄铜和不锈钢引导至较粗糙的级分，而铜和残余元素相当转移到更细胞中。 X射线荧光分选产生锌，铜，黄铜，不锈钢，不锈钢和贵金属级数在销售品质中。鉴定了机械预处理对这些级分的组成的负面也不产生负面影响。仅通过增加机械预处理，仅晶粒尺寸16-20mm的黄铜馏分的产量降低。预处理也没有对PyromePurgical试验产品的产量和质量产生影响。

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