Methods for removing impurities in metal scrap recycling

      #Industry ·2024-09-29

      In the process of metal waste recycling, the removal of impurities is a crucial step. This not only affects the purity of the recovered metal, but also directly affects the recovery efficiency and cost. In this paper, several common methods of impurity removal in metal waste recycling will be discussed.

      1. Physical methods Physical methods are the most basic impurity removal methods, mainly including the following:

      1.1 Magnetic separation Magnetic separation is the process of using magnetic materials to separate metal waste. This method is suitable for removing ferromagnetic impurities such as iron and steel.

      1.2 Screening Screening is the separation of metal waste of different particle sizes through the screen. This method can remove large non-metallic impurities.

      1.3 Air separation Air separation uses the difference in the behavior of materials with different densities in the air flow to separate light and heavy materials.

      2. Chemical methods Chemical methods remove impurities from metal waste through chemical reactions, including:

      2.1 Pickling Pickling is the use of acidic solutions (such as sulfuric acid, hydrochloric acid) to dissolve oxides and other impurities on metal surfaces.

      2.2 Electrolysis Electrolysis is a process in which metal ions are deposited from a solution by means of an electric current, thereby removing impurities.

      3. Mechanical methods Mechanical methods remove impurities through physical forces, including:

      3.1 Crushing Crushing is the breaking of large pieces of metal waste into small pieces to facilitate subsequent processing.

      3.2 Shearing Shearing is the cutting of metal scrap into smaller dimensions by shear force, which helps to remove attached impurities.

      4. Heat treatment method Heat treatment method removes impurities through high temperature treatment, including:

      4.1 Smelting Smelting is the melting of scrap metal at high temperatures, and impurities will float to the surface or sink to the bottom during the melting process, so as to be removed.

      4.2 Pyrolysis Pyrolysis is the heating of metal waste under conditions of no oxygen or low oxygen to decompose organic impurities.

      5. Biological methods Biological methods are an emerging impurity removal technology that uses microbial metabolic processes to remove impurities from metal waste.

      5.1 Microbial leaching Microbial leaching is the conversion of impurities in metal waste into soluble substances by specific microorganisms, which are then separated by solution.

      Impurity removal in metal waste recycling is a complex process, which needs to be selected according to the type of waste and the characteristics of impurities. With the development of technology, more efficient and environmentally friendly impurity removal methods may be developed in the future.

      Related tags:: bews tags news

      Jiangxi Mingxin Metallurgy Equipment Co., Ltd
      主站蜘蛛池模板: 在线天堂中文www官网| 欧美三级不卡视频| 国产成人精品A视频一区| 中文字幕国产剧情| 永生动漫免费观看完整版高清西瓜| 国产漂亮白嫩美女在线观看| 中文字幕一区二区三区日韩精品 | 久久精品桃花综合| 精品一区二区三区免费视频 | 多女多p多杂交视频| 久久精品这里热有精品| 一本一道dvd在线观看免费视频| 欧美牲交a欧美牲交aⅴ图片| 国产后入清纯学生妹| gta5圣堂酒店第三辆车在哪里 | 国产成人青青热久免费精品| 一区两区三不卡| 最近中文字幕在线中文视频| 加勒比一本大道香蕉在线视频| 国产精品宅男在线观看| 日产精品卡一卡2卡三卡乱码工厂 日产精品卡二卡三卡四卡乱码视频 | 性中国自由xxxxx孕妇| 欧美三级不卡在线观看| 精品久久久久久无码中文字幕一区 | 日本精a在线观看| 无码精品人妻一区二区三区漫画| 四虎影视久久久免费| 4虎1515hh永久免费| 成年人在线看片| 亚洲一区二区三区在线播放| 第四色播日韩第一页| 国产女人高潮视频在线观看| 97国产在线公开免费观看| 手机在线看片不卡中文字幕| 亚洲变态另类一区二区三区 | 国产**一级毛片视频直播| 天堂…中文在线最新版在线| 久久久久亚洲av综合波多野结衣 | 国产真实乱子伦视频播放| 一区二区三区免费视频观看| 日韩激情无码免费毛片|