What are the practical significance of the scrap crusher to the development of scrap treatment?
_steel is the most important basic building materials in many industries, such as aerospace, railway transportation, mining machinery, construction engineering and so on. As the largest developing country in the world, China has great demand for steel in various fields. With the sustainable development of China’s economy, China’s iron and steel industry has also been developing rapidly. In 2007, China’s steel output reached a record high of 500 million tons and became the world’s largest steel country. There are two main sources of iron and steel production, one is the mining and refining of primary iron ore, the other is the recycling of scrap steel. More than 50% of the iron ore supply from iron ore, which is scarce in China and is difficult to exploit and utilize, comes from one of the largest iron ore importing countries in the world. From all over the world, the demand for iron ore is also increasing. On the one hand, iron ore is the primary resources if the end of the exhaustion of unrestrained mining, on the other hand, it also led to the increase of iron ore prices, China’s imported iron ore CIF prices continued to increase the production costs of the steel industry.
Scrap steel is the only substitute for iron ore in iron and steel production. According to the analysis, about 0.8 tons of scrap steel can be steelmaking, 23 tons of iron ore can be saved, 1 ton of coke can be saved and 86%, 76% and 97% of exhaust gas, waste water and waste residue can be reduced respectively. With the improvement of iron and steel smelting technology, the scrap produced by enterprises gradually decreases. In recent years, the scrap from the society has been increasing. If a large number of scrap iron and steel waste is not recycled, it will cause waste of metal and steel resources, pollution of the environment, destruction of ecological landscape, land occupation does not conform to circular economy and sustainable development. The basic national policy. Recycling of scrap steel can also greatly alleviate China’s dependence on iron ore resources and import scrap. China’s total scrap demand in 2009 is expected to be about 74 million tons, while China’s domestic scrap estimated 27 million tons of social scrap on the same year-on-year growth of 4 million tons, estimated to be about 47 million tons of total 74 million tons. Scrap treatment is a key project to be solved and strongly supported by the state to achieve the goals of energy saving and emission reduction, environmental protection, economic growth and alleviating the crisis of iron ore resources.
_scrap processing machinery is an indispensable equipment for scrap material treatment in iron and steel production enterprises. With the utilization of scrap steel increasing, scrap processing equipment is also developing continuously. For iron and steel smelting enterprises, crushed steel has the advantages of high yield, stable chemical composition, shorter smelting cycle, less air pollution and slag, and higher purity, which can greatly improve the performance of iron and steel products and input-output ratio. At present, the most widely used scrap crushing line at home and abroad for scrap treatment through the scrap pretreatment, crushing, sorting and a series of complete processing lines to obtain pure high-quality available steel. Using scrap crushing production line to treat scrap also has many advantages for enterprises, which can expand the scope of scrap processing and recycling and facilitate transportation to improve the purity of molten steel. Therefore, scrap steel crushing production line plays a vital role in the recycling of scrap steel resources.