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Korea Iron & Steel Association      Chapter 5●The world of steel: how does it benefit the environment?
         Chapter 5 The world of steel:
                     how does it benefit the environment?                                                                                         It’s a lot like that stew. By soaking

                                                                                                                                                   and boiling the soybeans, tofu is
                                                                                                                                                   made by collecting the protein
                                                                                                                                                  components. What is left is the soy   Bean
                                                                                                                                                                                       Bean
                                                                                                                                                  pulp that is used to make biji stew.



                                                                                                                                                                                                    Soy pulp
                                                                                                                                                                                       Tofu
                                                                                                                                                                     Heating
                                                                                                                                                                     Heating           Tofu         Soy pulp

            Campaign to promote the recyclability of steel

                                                                                                                                                Instead of discarding
                                                                                                                                                the soy pulp, we create           ‘Scrap pulp’ is
                                                                                                                                                a new dish out of it.                                          as useful as
                                            98% recycled                                                                                        By-products generated               ‘soy pulp.’    (Nod, nod)
                                                                                                                                                during steelmaking
                                                                                                                                                                                                   (Nod, nod)
                                                 Slag                                                                                           are also regenerated
                                                                                                                                                as materials to service
                                                                                                                                                various purposes.





                                                                               Dad, what is
                                                                             steelmaking by-
                                                                                product?


                                    Hanna, do                                                                             The by-product generated
                                    you like biji                                                                        in the process of steelmaking
                                    (soy pulp)               When iron (Fe) is extracted from                                is called ’slag,’ 98%
                                      stew?                    iron ore, it produces residue.                                of which is recycled.

                                              I do. It's my
                                             favorite dish
                                                 #2.
                                                                                                                                                                                                  Pollution-free  fertilizer fertilizer
                                                                                                                                                                                                  Pollution-free












                              By-products are secondary products that are invariably generated in the process of manufacturing                Slag is a by-product that remains after iron is extracted from iron ore. For each 1 ton of molten iron
            Tidbit            a product. They can be additionally processed to be sold or recycled, which is why it is distinguished   Tidbit  made, about 400 kg of blast furnace slag (generated during ironmaking process) and about 170 kg of
                              from ‘waste’ that is discarded after use.                                                                       steelmaking slag (generated during steelmaking process) are produced.


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