This paper studies mechanism of change of gas pressure in the oven chamber during coking process and analyzes different change patterns of the gas pressure in the chamber of top charging oven and stamp charging oven.Based on the analysis,the paper suggests that different control strategies should be adopted for oven pressure regulation system of the top charging oven and stamp charging oven to achieve good effect of control.

In this paper,the chemical structure and properties of coal semifusinite is studied.The microstructure of coal is obtained.A further study is also made to the mechanism of coal carbonization,gasification and combustion.It can be used as reference for comprehensive utilization of the coal rich in semifusinite.

Two kinds of coke were chosen to study the reaction characteristics with CO2,pellet and lump ore, i.e.coke A represents low CRI coke and coke B for high CRI coke.The reasons for the difference of coke reactivity are discussed from perspective of heat absorption.The results show that high reactivity coke B is easier to react with CO2,pellet and lump ore than low reactivity coke A.When the carbon atoms of low reactivity coke separate from the molecular structure,more energy is consumed.More energy is needed to absorb so as to break the molecular structure and trigger chemical reaction.The energy consumption of high reactivity coke B is low,carbon atoms are easier to separate from coke moleculars.As a result,this chemical reaction is characterized with low temperature and uniform reaction.

Precise control for oven heating in cokemaking is studied.This technology plays a dominant role in practical production in the aspects of output growth,consumption reduction,energy saving,emission cut and profits generation so as to realize targeted management for coke oven production.

According to the result of 40 kg pilot oven for cokemaking,the influence of bulk density and fineness of coal blends on the coke quality is discussed.The test results demonstrate that the bulk density increases with the decrease of fineness of blended coal,in addition the cold mechanical strength and Coke Strength after Reaction (CSR) are improved accordingly,however the CSR,after increased to a certain level, will remain unchanged.

This paper introduced a safe and quick method to replace the coal plate on charging car for stamp-charge battery. This method is able to complete the coal plate replacement within one hour, cutting 3 hours compared with the conventional methods, without affecting normal operation of the coke oven. This method can be adopted for the charging cars of different types of stamp-charge batteries.