tailieunhanh - Handbook of industrial and hazardous wastes treatment - Part 2

Trong ngành công nghiệp kim loại kết thúc, kim loại hoặc hợp kim được sử dụng như là bắt đầu từ vật liệu để sản xuất một loạt các thành phần kim loại. Kim loại hoàn thành và ngành công nghiệp chế tạo kim loại được xác định là SIC (Tiêu chuẩn phân loại công nghiệp) mã 34. SIC mã 34 được chia thành chín lớp học: SIC 341 SCI 349. Các lớp con này cho biết nhóm sản phẩm [1]. Kim loại kết thúc liên quan đến việc hình thành và định hình kim loại và làm thay đổi. | 5 Treatment of Metal Finishing Wastes Olcay Tunay and i ik Kabdasli Istanbul Technical University Istanbul Turkey Yung-Tse Hung Cleveland State University Cleveland Ohio . INDUSTRY OVERVIEW In the metal finishing industry metals or alloys are used as starting materials to manufacture a wide range of metal components. The metal finishing and metal fabricating industry is identified as SIC Standard Industrial Classification code 34. SIC code 34 is further divided into nine classes SIC 341 to SCI 349. These subclasses indicate product groups 1 . Metal finishing involves the forming and shaping of metals and the altering of surface properties to enhance corrosion resistance electrical conductivity or resistance wear resistance chemical and tarnish resistance solderability torque tolerance ability to bond rubber and adhesives or organic coatings hardness reflectivity and decorative appearance. A broad range of processes is employed in the metal finishing industry. Metal fabrication covers mostly mechanical operations such as cutting and forming. Surface treatment involves plating conversion coating anodizing painting heat treating and many other operations. Degreasing cleaning pickling and etching are supporting processes. The industry manufactures a wide range of metal components such as cans hand tools hardware cutlery and structural metal products. Many industries use metal finishing in their manufacturing processes. Metal finishing is an essential part of a number of industries including automotive electronics defense aerospace hardware heavy equipment appliances telecommunication and jewelry. With this profile the metal finishing industry is among the most common industrial activities in the United States and in many other countries as well. While production methods and applications are similar in all metal finishing plants capacities vary widely. Metal finishing facilities are grouped into two major categories captives and job shops. Captive facilities .