EUROPEAN STEEL TECHNOLOGY AND APPLICATION DAYS 2017 - ESTAD 2017

In the context of the reconstruction and modernization of Arcelor Mittal coking plant at Gijon works, Paul Wurth has been awarded with the engineering, supply of key equipment as well as erection and commissioning supervision services for the rebuild of two coke oven batteries and the modernisation of the adjacent by-product and relevant waste water treatment plants. In particular, for the...

It becomes more important to properly prepare raw coal blend for cokemaking since required coke quality has been increasing. In particular, because coal size adjustment is an important operation which strongly affects coke strength, various control technologies for coal size have been developed. General coal size design has been almost based on the well-known Sovaco method. In the method,...

The shaft furnace is a scrap melting furnace which produces high calorie gas and thus plays an important part as an energy supplier in a steel works. In shaft furnace operation, the coke rate is reduced or the exhaust gas calorie is increased corresponding to the energy balance in the steel works. Because the coke rate and exhaust gas calorie are determined by coke gasification reactivity, the...

Coal weathering is regularly surveyed by cokemakers in order to avoid coke quality deterioration as a result of coal rheological properties decrease. Usual Gieseler fluidity and dilatation rheological tests are sensitive to weathering, but require values of initial and oxidized coal, which makes these tests difficult to be used. For this reason, three promising weathering detection tests were...

Pulverized coal injection (PCI) is now commonly used in iron making blast furnaces to produce reductants and to generate heat in the raceway. The advantage of using this important auxiliary fuel is that it replaces the expensive metallurgical coal and, therefore, helps in lowering the operating cost of the blast furnace. The optimization of the PCI practice has led to high rates of pulverized...

One of the global trends that are constantly challenging the iron and steel industry is related to the generation of fines, slurry, sludge and scales, summed up as ferrous by-products. The recycling of those by-products is commonly practiced in many steel plants. These materials normally cannot be used directly in the primary processes. The most common application is to add ferrous by-products...

Recently, in an environment in which the fluctuations of coking coal price increase, in order to produce high strength coke at a low production cost, it is required that the blending technology applied to various kinds of coal. The dilatation of coal is one of the significant factors determining coke strength. It is known that in the case of blended coal that contains semi-soft coking coals,...

The renewable biomass can be applied in the steel industry mainly by means of injection, gasification and mixing or embedding into raw materials, and contribute in such a way to the CO2 emission mitigation. Previous studies on the biomass usage in cokemaking concluded that a maximum amount of raw biomass in coal blend is limited to some 1.5 – 2.0 % due to deterioration of coke quality. To...

Steel production is responsible for roughly 8% of the global CO2 emissions and due to its projected growing worldwide demand, this figure can be expected to grow further. As modern steel production has been optimized over the last decades close to its thermodynamic and –chemical limits, considerable reduction of CO2 emission and energy demand by process optimization are considered difficult to...