CS257833B1

CS257833B1 - A method of heat treatment of ingots in chamber furnaces

Info

Publication number: CS257833B1
Application number: CS859838A
Authority: CS
Inventors: Rudolf Bodik; Karol Spontak; Oskar Winkler
Original assignee: Rudolf Bodik; Karol Spontak; Oskar Winkler
Priority date: 1985-12-23
Filing date: 1985-12-23
Publication date: 1988-06-15
Also published as: CS983885A1

Abstract

Spósob tepelnej úpravy ingotov v komorových najma hlbinných peciach s použitím dvoch druhov plynov a různej výhřevnosti podlá vynálezu spočívá v uplatnění viacerých fáz ohřevu reguláciou ich poměru kvality pri znížených nákladoch. Po ukončení fázy ohřevu za konštantného přívodu tepla, sa zaháji fáza vyrovnávania teplotových rozdielov, pri ktorej sa udržuje v peci konštantný objem spalin od 70 do 100 % objem prvej fázy, a to úměrným zvyšováním množstva privádzaného plynu o nižšej výhřevnosti a súčasným znižovaním množstva plynu o vyššej výhřevnosti. Pri úplnom zastavení přívodu plynu o vyššej výhřevnosti sa zaháji dokončovacia fáza, pri ktorej sa postupné znižuje objem spalin a to znižovaním množstva ostávajúceho plynu o nižšej výhřevnosti, až po dosiahnutie obsahu 880 až 900 kj.kg"! ingotu.The method of heat treatment of ingots in chamber deep-well furnaces using two types of gases and different calorific values according to the invention consists in applying several heating phases by regulating their quality ratio at reduced costs. After the heating phase with constant heat input is completed, the phase of equalizing temperature differences is initiated, in which a constant volume of flue gases is maintained in the furnace from 70 to 100% of the volume of the first phase, by proportionally increasing the amount of supplied gas with a lower calorific value and simultaneously reducing the amount of gas with a higher calorific value. When the supply of gas with a higher calorific value is completely stopped, the finishing phase is initiated, in which the volume of flue gases is gradually reduced by reducing the amount of remaining gas with a lower calorific value, until the content of 880 to 900 kj.kg"! of the ingot is reached.

Description

Vynález možno využit vo všetkých peciach periodicky pracujúcich, ktoré sú vyhrievané plynmi o rozdielnej výhřevnosti samostatné privádzanými až před horáky.The invention can be used in all furnaces periodically working, which are heated by gases of different calorific value supplied upstream of the burners.

Claims

OBJECTS OF THE INVENTION A method of heat treating ingots in chamber furnaces, particularly vertical, with vertical flue gas ducts using two types of gas with a calorific value such as blast furnace and coke oven with a controlled ratio, with constant heat input and a constant amount of flue gas in the heating phase. a rolling temperature measured in the furnace area characterized in that after the heating phase is completed, the temperature difference equalization phase is initiated at the height and cross section of the heated ingots, wherein a constant combustion gas volume of 70 to 100% of the volume used in the heating phase is maintained in the furnace; while increasing the amount of gas supplied at a lower calorific value and at the same time reducing the amount of gas at a higher calorific value, and finally completing the finishing phase at which the flue gas volume is gradually reduced, both by completely stopping the higher calorific gas m by decreasing the amount and continuously reducing the amount of remaining gas with a lower calorific value to a heat content in the range of 880 to 900 kJ / kg ingot.