Scrap metal recycling plant _ Da Xing waste recycling (certified) _ scrap metal recycling provided by the Dongguan City of-waste recycling company. Dongguan City of-waste recycling company (www.dxhphs.com) is specialized in the "scrap metal recycling, waste plastic recycling, e-waste recycling, industrial waste recycling, building" enterprise, the company of "honesty, hard service" concept, to provide you with the highest quality products and services. Welcome to inquire! Contact: Liu Weiming. Recycling Metal Processing Zone in the development of the disorder and the condition of the blind, according to preliminary statistics, our country has been built and the construction of various types of recycled metal processing zone up to more than 20 scrap metal recycling plant, the proposed park at least five. The current amount of all kinds of non-ferrous metal scrap belongings China's annual import of 7.7 million t at the mercy of the basic domestic ferrous scrap belongings back about 200 million t, Bale completed and under construction total processing to the park has reached 2000 million t mercy, quite the global scrap metal capacity. At present, China Recycling Metal Processing Park serious excess capacity, and the situation is still in the blind construction scrap metal recycling prices, countries need to be standardized. Heavy metals are about heavy metal, there is not the same as the definition of the method:? According density: the scientific community will be greater than the density of metal scrap metal recycling site 5 is defined as heavy metals. According atomic factor: atom in the periodic table atomic number greater than 20 metal; according to toxicity:? Environmental Engineering disciplines think heavy metal mainly refers to the obvious biological or toxic metallic element metalloid elements such as mercury, cadmium, lead, chromium, zinc , copper, cobalt, nickel, tin, arsenic and the like. Second, some of the characteristics of heavy metal pollution of heavy metals in water can be converted under the action of microorganisms is more toxic metal compounds; biological draw heavy metals from the environment can be extended by the biological role of the food chain, in vivo into a million times more upscale places enrichment up scrap metal recycling, and then enter the body through food, saved up in certain organs of the human body constitutes a slow poisoning hazard to human health; in only trace amounts of heavy metals in natural waters can attack toxic effects, the general toxicity of heavy metals attack range between about 1 ~ 10ppm, toxic metals such as onset of toxicity concentration range of mercury, cadmium, etc. in 0.001 ~ 0.01ppm.