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Production of high-carbon ferrochrome from dry-quenched semicoke

Research paper by V. M. Strakhov, V. S. Medyanik; L. I. Malinovskaya; A. A. Tsernikel; I. A. Veselovsky

Indexed on: 09 Nov '16Published on: 01 Jul '16Published in: Coke and Chemistry



Abstract

Abstract The quenching of semicoke by saturated steam (heating-gas temperature 550°C) is described. The working-moisture content W r in the semicoke is 3.0–6.7% for the new quenching method. As a reducing agent, semicoke has good characteristics: relatively low ash content (A d = 7.1%), low sulfur content (S d = 0.13%) and phosphorus content (P d = 0.029%), and high reactivity ( \({K_{C{O_2}}}\) = 4.0 cm3/g s) and electrical resistivity (ρ > 1.9 × 106 Ω cm). In tests, dry-quenched semicoke performs well in the production of high-carbon ferrochrome: decreased power consumption; increased furnace productivity; decreased consumption of chromium ore; and decreased sulfur content in the ferrochrome when Karaganda coal is completely reduced by the semicoke. The optimal semicoke content in the batch is up to 50 kg.AbstractThe quenching of semicoke by saturated steam (heating-gas temperature 550°C) is described. The working-moisture content W r in the semicoke is 3.0–6.7% for the new quenching method. As a reducing agent, semicoke has good characteristics: relatively low ash content (A d = 7.1%), low sulfur content (S d = 0.13%) and phosphorus content (P d = 0.029%), and high reactivity ( \({K_{C{O_2}}}\) = 4.0 cm3/g s) and electrical resistivity (ρ > 1.9 × 106 Ω cm). In tests, dry-quenched semicoke performs well in the production of high-carbon ferrochrome: decreased power consumption; increased furnace productivity; decreased consumption of chromium ore; and decreased sulfur content in the ferrochrome when Karaganda coal is completely reduced by the semicoke. The optimal semicoke content in the batch is up to 50 kg.W r rA d d d d d d \({K_{C{O_2}}}\) \({K_{C{O_2}}}\)36