Development of Measures to Improve the Efficiency of Using Pulverized Coal in Blast Furnace Smelting

Efficiency of using of pulverized coal injection (PCI) in blast furnace smelting depends directly on its cost price. For the preparation of PCI at Russian enterprises, mainly non-coking lean and gas coals of Kuzbass are used, which does not provide the desired reduction in costs for the production of cast-iron for JSC EVRAZ NTMK andPJSC NLMK due to high transportation costs. In this connection, the possibility of using petroleum coke and coke dust in the composition of pulverized coal for blast furnace smelting had been analyzed. Main obstacle to the use of petroleum coke is its high sulfur content. Optimal proportion of the petroleum coke in the composition of the PCI is determined, depending on the total consumption of PCI and the sulfur content in it. Experimental-industrial tests were conducted to introduce coke dust from the dry coke quenching plant into the charge of pulverized-coal fuel. Totally, petcoke and coke dust can replace up to 25% of imported coal and reduce fuel costs by 4–5%. Keywords: blast furnace, pulverized coal injection (PCI), coke dust, petroleum coke (petcoke), sinte

Complete thermodynamic analysis of the interaction of iron phosphate (FePO4) with hydrogen (H2) and carbon monoxide (CO)

Iron phosphate in the composition of concentrate is a fairly strong chemical compound. However, with the help of gaseous substances, such complex compounds decompose when heated to the required temperature, which contributes to the reduction of not only iron, but also phosphorus. Hydrogen and carbon monoxide were used as gaseous reducing agents. This article describes in detail the thermodynamic analysis of the reduction of phosphorus from iron phosphate, its interaction with hydrogen and carbon monoxide

Thermodynamic interaction of concentrate, sludge and mill scale from carbon

Due to the gradual depletion of reserves of a number of natural minerals, on the one hand, and the accumulation of a huge amount of waste containing valuable useful components, on the other, the problem of developing so-called man-made deposits is becoming increasingly urgent. Of particular interest are currently man-made deposits formed or being formed on the territory of the objects of placement of man-made waste of the metallurgical complex, including the preparation of raw materials (mining, processing, agglomeration, etc.), directly metallurgical processing and related production. The downward trend in iron ore reserves makes it particularly relevant to process manmade waste from ferrous metallurgy in order to obtain man-made iron ore raw materials

Thermodynamic interaction of concentrate, sludge and mill scale from carbon

Due to the gradual depletion of reserves of a number of natural minerals, on the one hand, and the accumulation of a huge amount of waste containing valuable useful components, on the other, the problem of developing so-called man-made deposits is becoming increasingly urgent. Of particular interest are currently man-made deposits formed or being formed on the territory of the objects of placement of man-made waste of the metallurgical complex, including the preparation of raw materials (mining, processing, agglomeration, etc.), directly metallurgical processing and related production. The downward trend in iron ore reserves makes it particularly relevant to process manmade waste from ferrous metallurgy in order to obtain man-made iron ore raw materials