ã€China Aluminum Industry Net】 1. Flotation method: waste materials such as waste plastics, waste wood, and waste rubber mixed in waste aluminum can be floated by water. The light waste in the scrap aluminum is floated in the water, washed away under the action of the water stream, and the scrap aluminum is pushed out by the screw propeller at the other end of the pool. Throughout the process, the remaining soils and dust and other soluble materials in the process of winnowing are contained in large amounts in water.
First, the flotation method Waste aluminum mixed with waste plastics, waste wood, waste rubber and other light materials, can use water as the medium of flotation. The light waste in the scrap aluminum is floated in the water, washed away under the action of the water stream, and the scrap aluminum is pushed out by the screw propeller at the other end of the pool. Throughout the process, the remaining soil and dust and other soluble substances in the process of wind dressing are contained in large amounts in water, washed away by water, and entered the sedimentation tank. The sewage is returned to the circulation after it is clarified by multiple sedimentation, and the sludge is cleared regularly. This method can completely separate lightweight materials with specific gravity less than water, which is a simple and easy method.
Second, the magnetic separation method Magnetic separation equipment can be used to sort scrap magnetic waste. Iron and its alloys are harmful impurities in aluminum and its alloys, and also have a great influence on the properties of aluminum and its alloys. Therefore, it is necessary to sort waste iron and steel that are mixed in the pretreatment process to a greater extent. The ideal technique for sorting scrap steel is the magnetic separation method for scrap aluminum scrap and low scrap aluminum scrap. This method has been widely adopted abroad. The equipment for magnetic separation is relatively simple. The magnetic source comes from an electromagnet or a permanent magnet. The design of the process is various and it is relatively easy to realize the cross-over method of the conveyor belt. The waste aluminum on the conveyor belt moves in the transverse direction. After entering the magnetic field, the waste steel is sucked up and left the transverse belt. It is immediately taken away by the longitudinal belt. After the running longitudinal belt leaves the magnetic field, the scrap steel loses its gravity and is automatically grounded and concentrated. stand up. The magnetic separation process is simple and has low investment and can be easily adopted. The volume of waste aluminum treated by the magnetic separation method should not be too large, and general chipping and scrap aluminum scraps are suitable.
The waste steel separated by magnetic separation method must be further processed. Because there are some non-ferrous metal components that are mechanically combined with aluminum in the scrap steel devices, it is difficult to separate them, such as nuts, wires, and keys on waste aluminum parts. , Plumbing, pinions, etc., are necessary for the sorting of this part, because the separation of non-ferrous metals can increase the output value and improve the grade of scrap steel, but the sorting is more difficult, generally manual dismantling and points The election is inefficient. In order to increase production efficiency, a more effective method for sorting the hard-to-disassemble aluminum and steel joints is to heat them in a dedicated melting furnace to melt the aluminum and remove the scrap steel.