Many people are confused about how to deal with scrap iron
after recycling. Is it simple to put it in the blast furnace and re-refine it into molten iron? It is not so simple to deal with waste iron. First of all, we must do Iron is selected from the scrap, and then what we do is like cleaning and preheating, so that we can put the processed scrap iron into the blast furnace for refining.
Magnetic separation is a treatment method that uses the magnetic differences of various materials in solid waste to sort in uneven magnetic sound. Magnetic separation is the most effective method for separating iron-based metals. After the solid waste is input into the magnetic separator, the magnetic particles are magnetized under the effect of uneven magnetic sound, so they are attracted by the magnetic field to attract the magnetic particles into the cylinder and discharge with the cylinder into the discharge end; non-magnetic The particles remain in the waste due to the small magnetic field force. The magnetic field sources used for magnetic separation are generally two types: electromagnets or permanent magnets.
Cleaning uses various different chemical solvents or hot surfactants to remove oil, rust, sand, etc. on the surface of steel parts. It is often used to treat a large number of ideas, bearings, gears, etc. that are contaminated by cutting oil, grease, oil or other attachments.
Warm up Scrap steel is
often contaminated with pollutants such as oil and grease, and grease and oil that cannot be evaporated immediately can contaminate molten metal. When the scrap steel stored in the open is wet, the molten metal is contaminated by the inclusion of moisture and other greases and oils. After being exposed to moisture, the scrap steel stored in the open air will quickly expand in the furnace due to the explosive moisture due to the inclusion of moisture and other greases.
For this reason, many steel mills use the method of preheating scrap steel, using flames to directly roast scrap steel, burn off moisture and grease, and then put it into steel furnaces. In the metal preheating system, there are two main problems to be solved: first, incomplete combustion of fats and oils can generate a large number of hydrocarbons, which will cause atmospheric pollution, and must be solved by thinking; second, because the scrap steel on the conveyor belt is different in size Different thicknesses cause uneven preheating and combustion, and sometimes the pollutants on scrap steel cannot be thoroughly cleaned.