The requirements for the recycling of construction and demolition waste are tightening, and companies in the waste business have improved their performance to comply with new legislation. Construction and demolition waste includes various recyclable materials, such as metals, plastics and wood. However, effective material recovery requires functional and reliable technology for sorting in order to separate waste fractions into useful secondary materials or applications. This paper concerns the mechanical sorting efficiency of construction and demolition waste with a commercial mechanical sorting equipment consisting of a roller screening and an air separation unit. Sorting ability is studied with pre-sorted and crushed test material. Sieve analysis of pre-sorted test material is used to define particle size distribution before sorting. The quality criteria of construction and demolition waste vary greatly, depending on a number of factors which pose a challenge to the operation of the sorting system. The studied sorting equipment was found to be reliable for producing nine different fractions from pre-sorted and crushed material mixtures. The requirements for the purity level of the fractions and the profitability of utilization define the number of fractions to be sorted cost-efficiently. Typically, a compromise between cost and purity level has to be found.

中文翻译：

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机械分类建筑和拆除废物的分类效率。

回收建筑废料和拆毁废料的要求越来越严格，废料行业的公司已经提高了绩效，以符合新的法规。建筑和拆除废物包括各种可回收材料，例如金属，塑料和木材。但是，有效的物料回收需要功能可靠的技术进行分类，以便将废物馏分分离为有用的辅助物料或应用。本文涉及利用由滚筒筛和空气分离装置组成的商用机械分类设备对建筑和拆除废物进行机械分类的效率。使用预分选并压碎的测试材料研究分选能力。预分选测试材料的筛分分析用于定义分选之前的粒度分布。建筑和拆除废物的质量标准差异很大，这取决于对分拣系统的运行构成挑战的许多因素。发现所研究的分选设备可可靠地从预分选和粉碎的物料混合物中生产九种不同的馏分。馏分纯度水平的要求和利用的获利能力决定了要进行成本有效分类的馏分数。通常，必须在成本和纯度水平之间找到折衷方案。馏分纯度水平的要求和利用的获利能力决定了要进行成本有效分类的馏分数。通常，必须在成本和纯度水平之间找到折衷方案。馏分纯度水平的要求和利用的获利能力决定了要进行成本有效分类的馏分数。通常，必须在成本和纯度水平之间找到折衷方案。