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We describe the results for full-scale experimental test production of high-basicity sinter (basicity 2.0–5.0) at the Enakievo Metallurgical Plant Sinter Shop. As sinter basicity increased from 2.0 to 5.0, the iron content of the sinter decreased from 53.05% to 32.24%, and the ferrous oxide concentration decreased from 17.55% to 9.29%. However, the strength specifications of the sinter were improved: The concentration of 0–5-mm fines decreased from 19.32% to 15.89%, and the yield of +5 mm size class in a drum test increased from 65.9% to 72.3% through optimization of the sintering process parameters. The use of high basicity sinter in blast-furnace smelting reduced the specific consumption of lime in the blast-furnace charge from 233.9 kg/metric ton of cast iron (at sinter basicity 2.0) to 103.5 kg/metric ton (at basicity 4.5) and, correspondingly, the specific feed rate for coke during castiron production decreased from 538.1 kg/metric ton to 476.6 kg/metric ton.

This article describes the use of coke of the Premium class on blast furnace No. 5 at the Enakievo Metallurgical Plant. It is shown that the use of this coke has increased furnace productivity by 5.7-6.9% and reduced the consumption of skip and nut coke by 3.2-4.1%.

This article examines the preparation of coke for blast-furnace smelting by a method that most fully meets the requirements of blast-furnace technology: screening of the −36 mm fraction, the separation of nut coke of the 15‐36 mm fraction, and its charging into the furnace in a mixture with the iron-ore-bearing charge components. An analysis is made of trial use of coke of the Premium class on blast furnace No. 5 at the Enakievo Metallurgical Plant. Use of this coke makes it possible to reduce the consumption of skip coke by 3.2‐4.1%. Recent decades have seen significant progress in blast-furnace technology, advances made in this area having increased furnace productivity to 2.5‐3.5 tons/(m 3 ·day), reduced coke consumption to 250‐300 kg/ton pig iron, and lowered the pig’s sulfur content to 0.011‐0.015% [1]. The main reasons for these changes have been the wide-scale use of additional types of fuel and improvements in all of the original components of the technology: the quality of the charge materials, the slag and blast regimes, and the design of the furnace and other equipment. The most important factor in allowing these changes was an improvement in the quality of the coke, which has experienced an increase in the mechanical, thermal, chemical, abrasive, and other types of loads. Data from German researchers show that the strength properties of German coke has more than doubled in the last 20‐30 years. Abroad, the quality of skip coke is being improved while continuing to satisfy the other requirements of the smelting operation by improving the quality of the coke-bearing component of the charge, the coking regime, and the coke’s preparation for the blast furnace. In accordance with the requirements of modern blast-furnace technology, in most of the developed nations the minimum value of the index that characterizes the hot strength of coke (CSR) is 60‐65% or more, while the index that characterizes its reactivity is lower than 25‐30% [2].