国产免费观看视频9999-国产一级一区二区三区-久久久久人妻精品乱码-免费欧美日韩视频成人劲爆-成人免费A级黄片-日韩无码三级黄片-黄片一级日韩99-一级性爱视频免费看-黄色A级影片一区二区

Company News Industry News

Steelmaking

2024-11-29
Steelmaking is the process of producing steel from iron ore and/or scrap. In steelmaking, impurities such as nitrogen, silicon, phosphorus, sulfur, and excess carbon (the most important impurity) are removed from the sourced iron, and alloying elements such as manganese, nickel, chromium, carbon, and vanadium are added to produce different grades of steel.

Today there are two major commercial processes for making steel, namely basic oxygen steelmaking, which has liquid pig-iron from the blast furnace and scrap steel as the main feed materials, and electric arc furnace (EAF) steelmaking, which uses scrap steel or direct reduced iron (DRI) as the main feed materials. Oxygen steelmaking is fueled predominantly by the exothermic nature of the reactions inside the vessel; in contrast, in EAF steelmaking, electrical energy is used to melt the solid scrap and/or DRI materials. In recent times, EAF steelmaking technology has evolved closer to oxygen steelmaking as more chemical energy is introduced into the process.



ABOUT  KEVA
Keva Casting is a professional casting company that focuses on Construction, Machinery, Automobile, Hardware, Pipeline and many other industries.
We provide top quality products with the best service based on our complete production chain including our own mold design, advanced production techniques, and full management of the supply chain. Keva Casting has two factories located in Zhucheng, China's Shandong province.
We use "shell molding", which is a new technique that has been developed in recent years.This new technique has simplified production procedures and reduced air pollution compared with traditional sand casting and investment casting. Shell making and core making are faster to ensure production in enormous quantities. The dimensions and surface finishing are satisfactory for all kinds of industrial requirements. Besides supplying our own formwork & scaffolding systems, our casting products also supply OEM services in various industries.


主站蜘蛛池模板: 一级强奸黄色电影| 精品视频在线免费观看免费| 91一区在线观看| 国产黄色一级片浏览器| 免费观看一级特黄欧美大片| 亚洲人成综合第一网| 成人在线观看视频黄片| 国产一级黄片一区二区| 一级片成人免费试看| 欧美熟妇精品一级A 片视色| 国产一级电影免费在线播放视频| 黄片小视频在线观看| 贵州一级黄色免费毛片| 一级毛片免费完版| 日韩毛骗一级网站| aaa全国最大在线观看免费观看 | 如何在线查看黄片视频| 久久久久亚洲精品中文字幕天堂 | 中国黄色三级片在线播放| 农村黄色一级毛片| 中文字幕一级毛片无码| 亚洲AV无码精品一级毛片| 一区二区三区三级电影| 一级毛片不卡视频| 一级18一20岁的黄片| 一级片成年人毛片电影在线| 日韩姓交一级黄色电影| 欧美特黄A级高清免费大片A片| 一级无码婬片AA片91| 欧美一级老年人黄色录像| 久久精品国产精品亚洲艾伦网| 三级片网址在线入口| 91成人爽毛片一区二区| 国产三级片免费黄色| 一级黄色绿相欧美| 成人综合视频导航| 三级强奸在线观看| 1级黄片在线免费观看。| 看一级黄色片在线视频| 特黄一级毛片a片| 亚洲巨乳美女人妻一级毛片在线观看 |