7TH EUROPEAN COKE AND IRONMAKING CONGRESS - ECIC 2016

Each year, approx. 400 million tons of blast furnace slag is produced worldwide with a tapping temperature of around 1,500°C. Currently, the slag is granulated in wet granulation plants using large volumes of water and to date it has not been possible to utilize the remnant heat energy of the molten slag, with approx. 1.8 GJ of energy per ton. However, in an R&D project currently underway by a...

Primetals Technologies has developed a new sinter shaft cooler which allows utilizing nearly the total heat capacity of the hot sinter charged to the cooler. By application of the counter flow principle to the cooling process the temperature of the cooling air exiting the shaft can be maximized. Compared to conventional sinter cooler systems the maximized hot cooler off air temperature of the...

The steel industry contributes to the global emissions of fossil carbon dioxide (CO2) by around seven percent, mainly caused by the usage of coal and coke as reductants in the blast furnace (BF). In the same time the BF is, and will be in a foreseeable future, the most energy efficient method to produce ore based liquid hot metal. A number of concepts to minimise the emission of CO2 have been...

The transfer of our fast growing society from a carbon based to a low carbon based economy/production within the next decades is the global megatrend which is discussed now for 15 years. The minus 80 % target can only be achieved by a transfer of the global energy system. We have today a portfolio of technologies available to reduce the CO2 intensity further, but without consideration of...

Steps to reduce greenhouse emission gases (CO2) are increasingly becoming a matter of priority for the industry, particularly for the iron & steel industry, which is the largest consumer of the world's generated energy on a global basis. This paper outlines the principal factors necessary for evaluating CO2 emission rates as the basis for comparing the net CO2 emission figures for different...

Environmental regulation and economic conditions demand greater efficiencies in the control of emissions and fugitive releases in iron ore processing, iron making, and coke handling operations. This paper provides an overview of recent applications of Computational Fluid Dynamics (CFD) to this aspect of the industry. The case studies discussed include: 1) NOx reduction expected by the...

Saving energy and reducing CO2 emissions from the steel works are important issues for the steel industry. Because heat loss at the blast furnace is already less than 10% of input energy, saving energy at the blast furnace decreases the energy supply to downstream processes in the steel works. However, it is possible to reduce energy consumption for agglomeration processes such as coking...

Four blast furnace steel makers and one engineering company in Japan have been prosecuted in the “CO2 Ultimate Reduction in Steelmaking Process by Innovative Technology for Cool Earth 50 (COURSE50) Project”, since FY2008 as a National Projects commissioned by New Energy and Industrial Technology Development Organization (NEDO). The target of COURSE50 is a reduction of approximately 30% in...

[Coke Producers are asked today to reduce environmental emissions and main resources’ consumptions (mainly water and energy sources). Optimization of energy requirements has already been approached and technology has now reached a good design level. Next challenge is to maximize the recovery of materials and energy, considering a not traditional approach for European market. The sensible heat...

LanzaTech and Primetals are enabling a resource revolution in the steel industry that supports a circular economy, by decoupling the use of natural resources and the generation of waste from economic growth. Microbial fermentation of carbon and hydrogen-rich off-gases, such as, blast furnace top gas, direct reduction gas and also converter BOF gas to produce ethanol or other basic chemicals,...