Blast furnace waste plastic technology

According to the principle of recycling of plastic waste from container packaging, Kawasaki Steel successfully developed a series of process technologies for the use of plastic waste on blast furnaces. The feature of this technology is whether there is vinyl chloride material in the waste plastics, which can be dechlorinated, then solidified, crushed, and converted into similar pulverized coal products.

Its specific approach is: Put the vinyl chloride-containing waste plastic into a solvent heated to about 2000°C. After stirring, chlorine is extracted from vinyl chloride to make hydrochloric acid recovery. Dechlorination resin can also be recovered from the solvent.

These technologies were jointly developed by the Kawasaki Steel Corporation and the Institute of Earth and Environment Technology. It took about three years from 1998 until it was completed at the Chiba Steel Institute in August last year to remove waste plastics. Chlorine experiment. The blast furnace injection experiment uses plastic after dechlorination through an experimental device. Usually, a plastic that has been dechlorinated by a tuyere that was originally injected with pulverized coal is injected to replace the method with the same amount of pulverized coal injected. At present, after the dechlorination, the air flow, blowing, reduction, and combustion of plastics are performed smoothly, and industrialization experiments are being prepared.