PRODUCT CATE
News

After the metal recycling is what to do with it?

After the metal recycling is what to do with it? General people are thought is recycling has on directly processing finished, actually recycling Hou of metal again using of process is not so simple, metal recycling processing is has a is strictly of process of, on recycling machine recycling Hou of metal tank and other of industrial of retired metal for, because zhiqian of uses as into has on metal of pollution, this on need we on recycling of metal for processing.
a.
of metal recycling solid waste for recycling, metal cans for different materials, the General method is magnetic. Magnetic separator magnetic differences is the use of a variety of substances in the solid waste, without even a method for separation of magnetic sound. Solid waste after entering the magnetic separator, magnetic particles in inhomogeneous magneto-acoustic effect is magnetized, thereby subject to magnetic attraction effect, magnetic particles sucked into the cylinder and then discharged into the discharge end of the cylinder; non-magnetic particles due to the magnetic field of force is very small, remaining in the waste. Magnetic separation of magnetic source is used by electromagnets or permanent magnets in two ways.
II. Metal recovery using chemical method, depth of decontamination
on iron and steel scrap, grease, rust, sediment and other, generally with different chemical solvents or surfactants for cleaning of the heat treatment. Common to a large number of cutting oils, grease, oil or other contamination of the engine, bearings, gears, and so on. Chemical method, the application deep decontamination technology is not very complex, but relatively effective. By choosing a different detergent formula, you can implement different types of metal surface cleaning. After the disintegration of the metal equipment, deep decontamination can, in General, to achieve the predetermined goal of decontamination. However, chemical decontamination method, depth technology cannot solve the contamination removal, for complex geometry of the object, its effect is not ideal.
in addition, the decontamination technology cannot remove the metal cracks in the radioactive material, which gap is a common phenomenon. Advanced surface chemical method of decontamination technologies require the use of various chemical reagents, in the process, may produce smoke, because some of these chemicals have strong corrosivity and toxicity, on the workers ' relatively unsafe, effluent discharge is also a potential hazard to the environment.
chemical decontamination lead * the possibility of contamination is high, especially when in order to limit the amount of secondary waste, decontamination or cycle, * contamination is more likely. Surface decontamination by chemical method, due to the use of various chemical reagents and the corresponding equipment and power and, therefore, require considerable running costs supported, however, this operation is usually acceptable. However, due to the chemical decontamination of the surface will produce a large number of secondary waste, their processing, preparing, staging and sewage disposal costs relative to itself, may be much higher. After initial decontamination of chemical law, generally speaking, metal objects up to control or restricted by controlling the level of cleaning solution, when a metal device after the collapse of, the implementation of deep chemical decontamination, may cause pollution levels lower than most metals residue cleaning solutions control or restricted the use of control levels. However, due to the cracks or deep contamination, there will be some scrap metal have to radioactive waste management. Precisely because of these shortcomings the depth of chemical decontamination method, tends to limit the application of chemical decontamination technologies.
San. Metal recycling preheating
steel may be in use, storage or transport, metal surface with oil and grease contaminants such as some immediately evaporate, so that grease and oil can cause molten metal pollution in the open air without humidity, due to the inclusion of moisture and other lubricating greases and oils will cause molten metal pollution.
after the open storage of scrap being affected with damp, due to the inclusion of moisture and other lubricating grease for easy vaporization of material, will burst and the rapid expansion in the furnace, nor join the furnace. For this reason, many steel mills use of steel scrap preheating method, using the direct baking of scrap iron and steel, burnt to the water and oil, then into the steel furnaces. In preheating system of metals, mainly to solve two problems: first, incomplete combustion of oil can produce large amounts of hydrocarbons, can cause air pollution, must find a solution and, secondly, due to the different size of scrap on the conveyor belt, thick, Preheat and burn caused uneven, sometimes cannot be thoroughly cleaned of pollutants on the steel scrap.
the recycling of scrap iron and steel, the main objective is to remove other impurities in the steel attachment, reduces in iron and steel smelting and other impurities in wrought iron and carbon, Silicon, manganese and other elements range impact.
BACK