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 (Sd = 0.13%) and phosphorus content (Pd = 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.
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References
Nefedov, P.Ya., Quality requirements to the carbon reducing agent for the ore electrothermics processes, Koks Khim., 2000, no. 8, pp. 24–32.
Nefedov, P.Ya., The carbonaceous reducing agents in ferroalloy production: the efficiency of application, Koks Khim., 2000, no. 2, pp. 27–31.
Ershov, V.A. and Pimenov, S.D., Elektrotermiya fosfora (Phosphorous Electrothermics), St. Petersburg: Khimiya, 1996.
Strakhov, V.M., Implementation of medium temperature coke instead of metallurgical in phosphorus production, Koks Khim., 1988, no. 10, pp. 28–33.
Strakhov, V.M. and Kanaev, Yu.P., Smelting of ferrosilicon in an open furnace with humidification of coke nut on the furnace throat, Stal’, 1999, no. 5, pp. 48–50.
Mizin, V.G. and Serov, G.V., Uglerodistye vosstanoviteli dlya ferrosplavov (Carbon Reducing Agents for Ferroalloys), Moscow: Metallurgiya, 1976.
Nakhabin, V.P., Sholokhov, V.F., Nevskii, R.A., et al., The use of coal char as a reducing agent in the production of chromosilicon and carbon ferrochrome, Stal’, 1964, no. 11, pp. 1006–1008.
Vorob’ev, V.P., Mikulinskii, A.S., Sorokin, R.N., et al., Smelting of 50% chromosilicon using coal char, Stal’, 1967, no. 12, pp. 1095–1096.
Serov, G.V., Mizin, V.G., Tolstoguzov, N.R., et al., Industrial tests of different coal chars in the smelting of 75% ferrosilicon, in Sovershenstvovanie proizvodstva ferrosilitsiya na Kuznetskom zavode ferrosplavov (Improvement of the Ferrosilicon Production at the Kuznetsk Ferroalloy Plant), Kemerovo, 1969, no. 2, pp. 105–116.
Vorob’ev, V.P., Sorokin, R.N., Zhuravlev, V.M., et al., Smelting of 50% chromosilicon using coal char at the Leninsk-Kuznetsk Plant, Stal’, 1970, no. 7, p. 618.
Kulinich, V.I., Vorob’ev, V.P., Strovskii, Ya.I., and Samokhin, A.I., Implementation of non-bitumnious coal and coal char in the production of carbon ferrochromium, in Fiziko-khimicheskie protsessy v elektrotermii ferroslplavov (Physical and Chemical Processes in Electrothermics of Ferroalloys), Moscow: Nauka, 1981, pp. 153–155.
Strakhov, V.M., Kulinich, V.I., Suslov, A.V., et al., The effect of internal properties of carbon reducing agents on specific electrical resistance of solid charge, resistance of furnace bath, and technical-economic indices of smelting process, in Tr. Vseross. nauchno-tekh. konf. “Altual’nye problemy rudnoi i khimicheskoi elektrotermii” (Proc. All-Russ. Sci.-Tech. Conf. “Relevant Problems of Mining and Chemical Electrothermics”), St. Petersburg, 2012, pp. 31–34.
Kornev, V.S., Bogomolov, A.R., Afanas’ev, Yu.O., and Medyanik, V.S., RF Patent 2468063, 2012.
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Original Russian Text © V.M. Strakhov, V.S. Medyanik, L.I. Malinovskaya, A.A. Tsernikel, I.A. Veselovsky, 2016, published in Koks i Khimiya, 2016, No. 7, pp. 21–26.
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Strakhov, V.M., Medyanik, V.S., Malinovskaya, L.I. et al. Production of high-carbon ferrochrome from dry-quenched semicoke. Coke Chem. 59, 254–259 (2016). https://doi.org/10.3103/S1068364X16070061
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DOI: https://doi.org/10.3103/S1068364X16070061