Abstract

The constant increase in the consumption of ferrous, non-ferrous, precious and rare metals in the national economy requires an increase in the efficiency of minerals mining and processing. One of the main methods of enrichment used in the technological process of processing various ores is foam flotation. The authors provide a brief description of this process and analysis of various designs of flotation machines. The article is devoted to the modernization of the aeration unit of flotation machines with the “RIF” design. It is noted that the design of such machines effectively uses the modular principle of assembly aggregates, which allows one to upgrade individual unit, increasing the efficiency of the machine as a whole. The main part of this unit is an impeller—the most complex and fast—wearing part. The paper analyzes various designs of impellers and their manufacturing technologies. In the existing designs of flotation machines, the impellers are made of steel. It is proposed to replace this material with polyurethane, which has become widely used as a structural material due to the emergence of additive technologies in the production of various parts. This material has a relatively low cost and has an increased resistance to wear. The article formulates the main requirements for the most important operations of the technological process of impeller manufacturing. For this purpose, a 3D model of the upgraded impeller design was developed in the SolidWorks 3D computer-aided design system. The authors propose an additive technology for layer-by-layer production of an impeller on a 3D printer using the Ultimaker Cura slicer program. For the manufacturing of the proposed design of the impeller made of polyurethane, the production technology was developed by the method of layer-by-layer deposition method of Fused Deposition Modeling (FDM).

中文翻译：

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基于添加剂技术的浮选机叶轮的研制

摘要

国民经济中黑色金属、有色金属、贵金属和稀有金属消费量的不断增加，要求提高矿产开采和加工效率。处理各种矿石的工艺过程中使用的主要浓缩方法之​​一是泡沫浮选。作者对该过程进行了简要描述，并对浮选机的各种设计进行了分析。本文专门介绍采用“RIF”设计的浮选机曝气装置的现代化改造。值得注意的是，此类机器的设计有效地利用了组装聚合的模块化原理，允许升级单个单元，从而提高机器整体的效率。该装置的主要部件是叶轮——最复杂和最快速的磨损部件。本文分析了叶轮的各种设计及其制造技术。在现有的浮选机设计中，叶轮由钢制成。建议用聚氨酯代替这种材料，由于在各种零件的生产中出现了添加剂技术，聚氨酯已被广泛用作结构材料。这种材料的成本相对较低，并且具有更高的耐磨性。文章制定了叶轮制造工艺流程中最重要操作的主要要求。为此，在 SolidWorks 3D 计算机辅助设计系统中开发了升级叶轮设计的 3D 模型。作者提出了一种使用 Ultimaker Cura 切片机程序在 3D 打印机上逐层生产叶轮的增材技术。