焦作炯移教育咨询有限公司|免费+无码+国产在看果冻传媒-日韩av电影在线观看-中文字幕免费高清电视剧网站

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.


亚洲桃色AV无码| 亚洲国产精品久久久久秋霞1| 91精品国产自产在线观看不卡| 被黑人猛躁10次高潮视频| 久久se精品一区二区| 亚洲一区在线观看无码欧美| 人人妻人人插视频| 精品国产乱码久久久人妻| 天天躁夜夜踩很很踩2022| 中文字字幕在线精品乱码| 国产成人精品亚洲日本在线观看| 国产做爰又粗又大又爽动漫| 欧美日韩精品一区二区三区高清视频| 日本三级成本人网站| 国产乱妇无乱码大黄aa片| 乱码丰满人妻一二三区| 亚洲欧美变态另类综合| 曰本a级毛片在线观看| 亚洲精品自偷自拍无码| 亚洲精品久久久久久一区二区| 肉体裸交137日本大胆摄影| 狼色精品人妻在线视频免费| 中字幕一区二区三区乱码| 狠狠色狠狠色综合网老熟女| 被强行灌满精子的少妇| 久久久久人妻一区二区三区| 国产人妻人伦精品熟女A片| 精品免费国产一区二区三区四区| 国产亚洲精品久久久一区| 刺激videoschina偷拍| 18岁日韩内射颜射午夜久久成人| 男人j放进女人j免费视频无遮挡| 7777奇米成人四色眼影| 久久久久久A亚洲欧洲AV| 国产午夜精品av一区二区| 99久久无码一区人妻A片孕妇| 久久久久亚洲AV成人人电影| 狠狠精品干练久久久无码中文字幕| 亚洲AV综合AV成人小说| 玖玖资源站亚洲最大的网站| 无遮挡激情视频国产在线观看|