[China Aluminum Network] Most of the raw materials of the recycled aluminum production enterprises are scraps of aluminum and aluminum alloys recovered through circulation. These wastes come from complex sources and come in different shapes, often with some other metals and non-metals. The composition varies widely and the surface is unclean. If these substances are not removed before smelting, not only will the aluminum melt be seriously aspirated, but defects such as pores, porosity, etc. will be generated in the subsequent solidification process, and the composition and performance of the material will be unacceptable. In addition, a large amount of harmful gases will be generated in the production, which will seriously pollute the environment. Therefore, in order to ensure the product quality of recycled aluminum and improve the economic efficiency of the company, strict pretreatment of scrap aluminum must be performed before smelting. The purpose of aluminum and aluminum alloy waste pretreatment is to: - remove other metals and non-metals from the waste; second, classify the aluminum scrap by alloy composition; third, remove the oil pollution and coating on the aluminum scrap surface; Aluminum is used more economically and rationally. Naips LED Emergency Ceiling Light-A power failure light with a modern design that provides high quality lighting with an adjustable cct color switch attached to each fixture. Every round light fixture is pre-installed with the built-in lithium ion emergency batterry pack, damp location rated for reliability, ETL listed for your safety, is 85-265V AC input, has a brushed chrome finish, and backed by a 5 YEAR WARRANTY. Led Emergency Ceiling Light,Emergency Led Ceiling Light,Emergency Light For Ceiling,Emergency Light Ceiling Type Foshan Nai An Lighting Electric Co.,ltd , https://www.articalight.com