Abstract The energy-contained fraction of the municipal solid waste (MSW) is called refuse-derived fuel (RDF). RDF has a diverse blend of various materials and thus its physical properties and chemical composition are not predictable. Pelletization is one way to reduce the variability of RDF for applications like combustion. In this research, a typical RDF sample was constructed by blending four components of paper, plastic, wood and household organics. The entire blend was subjected to size reduction, drying and wetting. The influence of particles passed through 2, 4 and 6-mm grinder screen size and moisture contents 15, 20, 25 and 30% w.b. on the durability and density of pellets was investigated. The 4-mm RDF sample consumed higher energy and produced pellets with a lower durability than pellets from larger particles. The 6-mm grinder screen produced large pieces of paper and plastics that reduced the free flow of the blend into the pellet die. The RDF sample with an initial moisture content of 20% consumed the lowest pelletization energy. The force vs. deformation curve for compaction of the material to form pellets exhibited rigid material characteristics.

中文翻译：

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垃圾衍生燃料的造粒特性 - 粒度和水分含量的影响

摘要 城市固体废物 (MSW) 中含有能量的部分称为垃圾衍生燃料 (RDF)。RDF 具有多种材料的多样化混合，因此其物理特性和化学成分是不可预测的。造粒是减少燃烧等应用中 RDF 可变性的一种方法。在这项研究中，典型的 RDF 样本是通过混合纸、塑料、木材和家用有机物四种成分构建的。整个混合物经过粉碎、干燥和润湿。研究了通过 2、4 和 6 毫米研磨机筛网尺寸和 15、20、25 和 30% wb 的水分含量对颗粒耐久性和密度的影响。与较大颗粒的颗粒相比，4 毫米 RDF 样品消耗更高的能量并且产生的颗粒的耐用性较低。6 毫米的研磨机筛网会产生大块的纸和塑料，从而减少了混合物进入颗粒模具的自由流动。初始水分含量为 20% 的 RDF 样品消耗的造粒能量最低。压实材料以形成丸粒的力与变形曲线表现出刚性材料特性。