SU1675282A1 - Method of preparing anhydrous taphole plugging clay for metallurgical units - Google Patents

Description

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(21) 4673940/33 (22) 01/06/89 (46) 07.09.91. Bul No. 33

(71) Karaganda Metallurgical Plant and the Central Research Institute of Ferrous Metallurgy named after I.P. Bardeen

(72) J.E. Sleptsov, V.M. Gorobtsov, G.D. Fufeev, V.N. Vakulin, V.N. Belkov. V.V. Kalendov, V.N. Ivantsov and A.M. Pecherkin

(53) 666.972 (088.8)

(56) Volkov Yu.P., Jacques RM. Production and use of anhydrous masses for closing pig-iron letter blast furnaces. - Bulletin Chermetinformatsi, No. 3, 1984, p. 3

(54) METHOD OF PREPARATION OF ANHYDROUS MASS FOR FINISHING THE EXHAUST HOLES OF METALLURGICAL UNITS

(57) The invention relates to refractory materials and can be used to seal the outlet openings of metallurgical units, in particular a tap hole for the production of iron from blast furnaces. The purpose of the invention is to increase the stability of the masses when exposed to liquid metal and slag. The method of preparing anhydrous mass to seal the exhaust ports of metallurgical units, mainly blast furnaces, involves heating ground pitch, coke and chamotte powders, mixing with a portion of the binder taken in an amount equal to the ratio of the total content of pitch, coke and chamotte powder to the mass of solid components of the mixture of the total amount of binder, and then refractory clay and the remaining binder are introduced into the resulting mixture. Fuel oil waste from heat and power units and rolling shops based on industrial oils are used as a binder. According to the proposed method, the rate of erosion of the mass by the iron is 0.68-0.81 mg / cm2-min; slag 0.56-0.63 mg / cm2 min. 1 з p. F-ly, 1 tab.

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The invention relates to refractory materials and can be used to seal the outlet openings of metallurgical aggregates, in particular tap holes for the production of pig iron from blast furnaces.

The purpose of the invention is to increase the stability of the mass when exposed to liquid metal and slag.

Example. Ground components of the refractory mass: pitch. coking and chamotte powder are fed to the anode-4 screw mixer. After heating and stirring, a portion of the liquid binder component is introduced, equal to the ratio of the total content of pitch, coke and fireclay

powder to the mass of solid components of the mixture of the total amount of binder. After 5-10 minutes of mixing, the refractory clay is introduced into the mixer and after 5-10 minutes the remaining part of the binder. As a liquid binder component, coal tar or fuel oil waste heat and power units and rolling mills on the basis of industrial oils are used.

Characteristics of coal tar: coke number not less than 30%, naphthalene not more than 2.0%, humidity not more than 0.5%, density 1.2-1.22 t / m3.

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Characteristics of fuel oil waste: fuel oil 5-10%, industrial oil 70-80%, density 0.95-0.98 t / m3.

The properties of the anhydrous mass prepared by the known and proposed methods are shown in the table. Based on the data obtained by the proposed method, the rate of erosion of the mass of iron by 0.42-0.47 mg / cm2. min and slag 0.3-0.3 mg / cm. mines lower than the known.

Claims (2)

1. Method of preparing anhydrous mass for sealing the outlet openings of metallurgical aggregates by mixing ground pitch and coke with preheated chamotte powder, refractory clay and organic liquid binder, about 0 and 0 five in order to increase the resistance of the mass when exposed to liquid metal and slag, firstly ground pitch, coke and chamotte powder is mixed with a part of the binder, taken in an amount equal to the ratio of the total content of pitch, coke and chamotte powder to the mass the solid components of the mixture of the total amount of binder, and then refractory clay and the remaining binder are introduced into the resulting mixture. 2. A method according to claim 1, characterized in that fuel oil waste from heat and power units and rolling shops based on industrial oils are used as a binder.