Iron is found the world's oldest, most extensive use, the amount is at most a metal, its consumption accounts for about 95% of the total consumption of the metal. Iron ore is mainly used in the iron and steel industry to smelt pig iron with different carbon content (the carbon content is generally above 2%) and steel (the carbon content is generally below 2%). Pig iron is usually divided into steelmaking pig iron, foundry pig iron and alloy pig iron according to the use. Steel is divided into carbon steel and alloy steel according to the composition elements. Alloy steel is a steel that is intentionally added with an appropriate amount of one or more elements to improve or obtain certain properties on the basis of carbon steel. There are many types of elements added to steel, mainly chromium , manganese , vanadium , titanium , Nickel , molybdenum , silicon. In addition, iron ore is also used as a catalyst for ammonia synthesis (pure magnetite), natural mineral pigments (hematite, mirror iron ore, limonite), feed additives (magnetite, hematite, limonite) ) and precious stones (magnets), etc., but in small amounts. Steel products are widely used in all aspects of the national economy and people's lives, and are essential materials for social production and public life. Since the invention of the converter steelmaking method in the mid-19th century, steel has been the most important structural material, and it has occupied a very important position in the national economy. It is an important pillar industry for social development and the most important for modern industry. The most applied metal material. Therefore, people often use the output, variety and quality of steel and steel as an important indicator to measure the development level of a country's industry, agriculture, national defense and science and technology.
Flange Fitting,Hdpe Flange Adaptor,Pvc Flange Adaptor,Pipe And Flange
Ningbo Xintai Industry and Trade Co., Ltd. , https://www.nb-xintai.com