Now the world is advocating environmental protection, to promote harmony to protect the environment, in the industrial aspects of more attention, so in Refractory recycling has been widely attention in recent years. In recent years, sustainable development has been mentioned in the red-headed documents of various countries! Every time the heads of state meet, sustainable development has to be mentioned. With the serious melting of the Poles, the increase of carbon dioxide, air quality has threatened to people's health! The waste reuse is the imagination that people put forward! Like Refractory, Refractory is a high temperature, high heat, and high performance material that has been tested to produce a good, hard product! But we also know that Refractory experience, need to remove a lot of polluting gas, and due to equipment constraints, the Refractory material utilization rate is only about 50% , then how do we deal with the other 50% ? It would be a shame to throw it away! That's when we thought about sustainable use. We collected the materials that weren't fully functional and burned them again!
REFRACTORY IN STEEL COMPANIES: MELT LOSS 33% , internal reuse 25% , external reuse 37% , waste gas 5% .
Total mass balance of Refractory: MELTING LOSS 33% , non Refractory application 31% , Refractory recycling 24% , exhaust gas 12% .
Less than preventing pollution of the environment
The Refractory itself is not a serious polluter. In addition to the desertification of land and atmospheric dust caused by the stockpiling of unused raw materials and used Refractory, chromium pollution has been a major concern in recent years. The use of Magnesia chrome Refractory in cement rotary kilns has been banned in some developed countries and better results have been achieved with spinel and dolomite as substitutes. In China, the relevant research and trial work is still in progress.
In the metallurgical industry, especially in the non-ferrous metallurgical industry, magnesia-chrome material is still an important Refractory. Unlike the cement industry, the Refractory in the metallurgical industry does not readily convert directly to hexavalent chromium and may cause less environmental pollution. However, long-term open storage of raw materials and waste bricks will also cause hexavalent chromium to enter the groundwater system and cause pollution. At present, it is urgent to strengthen the storage and recycling of waste brick, and actively develop alternative products, which has a long way to go in the non-ferrous metallurgical industry. As a member of the world, China has the responsibility and obligation to make its own efforts to contribute to the improvement of the environment, recycling after Refractory is also in the works.