The data obtained on 220-T ultra-high power electric arc furnace (EAF) were analysed in order to study the impact of DRI quality on the steelmaking process parameters and consumption of lime, coke, oxygen, natural gas, electrical energy and electrodes. In addition, the effects of charging methods and proportions of DRI in an EAF were studied. It was found that by increasing the proportion of non-high quality reduced pellets and/or HBI to 45% of the metallic charge, the steel yield decreased to 85.32% and increased to 87.57% when between 75 and 100% continuous feeding of high quality reduced pellets. This resulted in saving 21 min in tap-to-tap time and 7% of the electrode consumption. Charging high proportion of non-high quality DRI from 45% to 100% in EAF, leads to a loss of 4 tons/heat in liquid steel, and an increase in lime consumption from 4 to 6 kg/ton liquid steel.

The sustainable development goals (SDGs) for the United Nations are the main factors that determine and form the future of industry and economy global wise. Green industry is the key word in any new investment and economic project, which makes the investors working for upgrading and developing the ongoing industries in order to fit with SDGs requirements and principles from one side and to keep the line of following the sustainability requirements for the new projects from the other side. Metallurgical industries are considered the most changing industries to follow sustainability boundaries and SDGs due to the huge amount of natural resources used (raw materials and ores), huge amount o energy (mostly fossil energy) and a plenty of required water. One of the important measures for sustainability as it affects safety and health of labors is the noise. Noise affects the health of workers and can be reason of fatal incidents and be a source of economic drawback in such heavy industry. This article clarifies the research work to evaluate the noise at steel plant and how it'll be studies and consider the methodology to overcome the harms results from it in way to help such important industry to be eco-friendly and sustainable.

No abstract

The main focus of this article is to explain the scientific and engineering principles behind the development of seismic steel, which is specifically engineered to withstand seismic forces during earthquakes. Through careful control of the steelmaking process, including alloy chemistry and thermomechanical treatments, microstructures are created that provide the necessary strength, ductility, and toughness for seismic applications. S700 steel, also known as ultra-high-strength steel (UHSS), is an advanced material that has gained significant interest in recent years due to its exceptional mechanical properties. It is an example of seismic steel. This review aims to provide an overview of S700 steel, including its composition, characteristics, applications, recent advancements in the field, and potential benefits and challenges associated with using this material. The simulations using JMatPro have shown promising findings, concerning the potential for the studied modified S700 steel alloy to enhance structures' safety and resilience in earthquake-prone regions, as well as the combination of S700 steel and JMatPro represents a significant advancement in materials science and engineering.

No abstract