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1. (WO2018177510) IMPROVED PROCESS FOR CONDUCTING A COKE OVEN

Pub. No.:    WO/2018/177510    International Application No.:    PCT/EP2017/057304
Publication Date: Fri Oct 05 01:59:59 CEST 2018 International Filing Date: Wed Mar 29 01:59:59 CEST 2017
IPC: C10B 15/02
C10B 41/00
Applicants: THYSSENKRUPP COMPANHIA SIDERÚRGICA DO ATLÂNTICO
THYSSENKRUPP AG
Inventors: JUNQUEIRA, Yan Samuel Ferreira
HENRIQUE, Neussias Inocencio
ANACLETO, Savio Luiz
Title: IMPROVED PROCESS FOR CONDUCTING A COKE OVEN
Abstract:
The present invention relates to a process for the preparation of coke from coal in a coke oven, to a coke oven and to the use of this coke oven to prepare coke from coal. The process for the preparation of coke from coal in a heat recovery coke oven comprises at least the following steps: (A) Providing coal (1) in the at least one primary chamber of the coke oven, (B) At least partial combustion of gas released from the coal in the at least one primary chamber by introducing air through the at least one moiety for providing air (4) to the at least one primary chamber, and carbonization of the coal to obtain coke at a temperature T1, (C) Combustion of the remaining gas released from the coal in the secondary chamber (6) at a temperature T2, wherein this remaining gas has been guided to the at least one secondary chamber (6) through the connection (5) between the at least one primary chamber (2) and the at least one secondary chamber (6), by introducing air through the at least one moiety for providing air (8) to the at least one secondary chamber and (D) Removing the off-gas obtained from steps (B) and (C) through the at least one collector (9), wherein temperature T2 is measured in predefined time intervals during steps (B), (C) and (D) and the at least one moiety for providing air (60) to the at least one secondary chamber is adjusted depending on a comparison of T2 with a value SP2 calculated from T2 of the foregoing time interval, wherein the first value SP2 is predefined at the beginning of step (B). According to a preferred embodiment of the process according to the present invention, SP2 is calculated according to the following method: The first value of SP2 is set by the operator. After certain a certain time interval, for example 20 minutes, temperature T2 is measured and the central processing unit calculates if the difference of SP2 and T2 (SP2 - T2) has increased or decreased during the time interval. For example, if SP2 - T2 has increased more than 2°C, SP2 is recalculated and the new SP2 is the old SP2 + 5 to 14 °C. Further, if SP2 - T2 has decreased more than 1 to 5 °C, SP2 is recalculated and the new SP2 is the old SP2 - 10 to 25 °C.