Continuous casting electromagnetic stirringㄗbrief EMSㄘ technology refers to the electromagnetic metallurgy technology, which is used to improve the quality of continuous casting billets by installing different types of EMS at different locations of the CCM. The generated electromagnetic force to enhance the flow of the liquid, thus change the heat transfer condition during the solidification of…
Q: Why does the molten steel need to be deoxidized? A: If the molten steel is not deoxidized, the continuous casting billet will not have the correct solidification structure. High oxygen content in steel will also produce subcutaneous bubbles, loosening and other defects, and intensify the harmful effects of sulfur.…
Steel slag can be used as blast furnace and converter raw materials in steel plants, and can also be used for road engineering, building materials, agricultural fertilizer and pit filling. In sintering ore with steel slag instead of flux, it can not only recycle the residual steel, FeO, CaO, MgO, MnO…
Rolling mill is one of the most important equipment in steel plants. Modern advanced technologies provide the most possible to manufacture high quality mills. Here common mills are classified by the structure of rolling mills. 2-high mill The 2-high rolling mill has a simple structure and can reciprocate to roll…
3. Slitting Rolling Process The slitting rolling is mostly used in bar continuous or semi-continuous rolling lines, and can greatly increase output of small-size rebar. This rolling process simplifies billet specifications and pass design, improves mill output, for the same section of the rolled part, comparing normal rolling process, the…
Along with modern technology development, more and more steel entrepreneurs induce advance processes to improve product quality and plant efficiency. For steel bar production line, the following processes are used commonly. 1.Direct Rolling Billet Direct rolling technology is suitable for production lines to make plain carbon steel and low alloy…
The internal quality of the billet refers to the low power structure,component segregation, central loosening, central segregation and cracks. The formation of defects in billet involves the action of heat transfer, mass transfer and stress in solidification. After the billet is thermally processed, some defects can disappear, some are deformed,…
Casting billet surface defects vary in shape and are mainly affected by the solidification process of the mould liquid, and are related to the formation of the steel shell, liquid level fluctuations of the mould, immersion nozzle design, performance of protective slag and other factors. Good control of key factors…
Steelmaking production is progressing towards more clean and more high efficiency along with many technologies put into practical application. Scrap crushing and sorting technology Scrap is mixed with ferrous metals, non-ferrous metals, non-metals, and should be crushed and sorted before charging into the furnace. Apart from separation, the paint and coating…
Scrap is the main material for EAF steelmaking. Scrap quality has a direct impact on steel quality, cost and furnace productivity. Therefore scrap should meet following requirements before charged. The surface of scrap steel should be clean and less rust, sand and other sundries in scrap will reduce the conductivity…
