In view of structural features，heating characteristics and production practice in combustion chamber of 6-arch heat recovery coke oven，the automatic heating technology for combustion chamber of the 6-arch heat recovery coke oven was independently developed by Coking Plant of Sansteel，which has been successfully used in a one-oven battery. This attempt provides reference for the automatic heating of the combustion chamber of other similar multi-arch heat recovery coke ovens at home and abroad，it also helps give new idea for an optimized design and construction of multi-arch heat recovery coke oven in the future.

This paper introduces the commissioning steps，methods and precautions of OPR system for single chamber developed by ACRE. On the basis of the basic components and operating principles of the OPR system，together with the experiences in solving the problems during the commissioning of the hand-over projects，the standardized commissioning procedures of the OPR system are summarized and described，which can be used as guidance and reference for future commissioning of the OPR system

In order to utilize more than 600 000 tonnes of Australian coal that had seriously exceeded

its storage period at Yingkou port，the quality and coking performance of three types of Australian coal

at different storage times and in different coal pile parts were tested to analyze their quality deterioration

as well as their impact on the quality of the coke produced. The three coal types were eventually used

without affecting the quality of the coke produced.

The cost of coal blending accounts for 80% of operation cost in coking plant. Through optimization and improvement of whole process management，the ratio of gas coal blending is increased up to 45%，which will greatly reduce the cost of coal blending.

This paper studies the matching between collection quantity of coke breeze and capacity of dust conveying equipment，and compares the equipment configuration，one time investment，operating cost and the advantages and disadvantages of the process of scraper and pneumatic conveying scheme，which can provide theoretical basis for provision of CDQ dust conveying system in the future and benefit for environment improvement.

Ammonia stripping is one of the key processes during by-product production，whose stable operation is directly related to the stability of the biochemical and downstream systems．Though different plants have different process flows，coal blending management and operation management，the key is still to control indexes of COD and NH3-N．This article analyzes the practices of Yongxin coking plant in ammonia stripping production to offer the management approach for more technical personnel．

By studying the SO2 conversion reaction equation and analyzing problems in the actual production process，optimization is made in terms of design，process and control interlock so that the SO2 conversion and treatment efficiency have been improved. In addition，the tail gas with DeSOx &

DeNOx can be treated to achieve ultra-low emissions.

According to the operating conditions of ammonium sulfate unit，the influence of ammonium

sulfate crystallizing tank and crystallizing pump on the particle size of ammonium sulfate product is

analyzed，and the corresponding measures are proposed in this paper for optimization.

This paper introduces the application of complex iron catalysts in the PDS alkaline desulfurization process of coke oven gas，their significant effects in reducing the amount of desulfurization waste liquid，and the existing problems after using complex iron catalysts as well as its solution.

The original benzene hydrorefining unit used coke oven gas as a raw material to produce hydrogen．After undergoing a process transformation to use hydrogen-rich tail gas for hydrogen production，the unit has simplified its process，stabilized equipment operation，reduced manual operation and energy consumption，improved the quality and yield of hydrogen，and increased economic benefits

In order to improve the naphthalene removal effect of the primary gas cooler on raw gas， additional valves and flow meters have been provided to control the composition and flow rate of the spraying liquid in primary gas cooler，thereby reducing the corrosion of residual naphthalene in raw gas

on equipment and pipelines and the impact of gas purification process.

By increasing the temperature of the reactor，raising the vacuum level of the flash tank，and optimizing the process flow of the original modified asphalt plant，modified pitch with a high softening point of 118～130 ℃ and a coking value greater than 60% was produced.

This paper introduces the basic concepts and technical principles of Oxygen-enriched combustion and analyses the economics and environmental friendliness of Oxygen-enriched combustion technology in comparison to air combustion technology．Oxygen enriched combustion technology，with good economy and environmental friendliness，can not only reduce the amount of exhaust gas，heat loss，operating cost and investment of combustion furnace，but also minimize the emission of CO2，SO2 and NOx．

Through the analysis of the factors affecting the water quality of the phenol cyanide wastewater treatment station，it is found that water temperature，concentration of influent pollutants， reflux ratio，and equipment failure are the main factors causing unqualified water quality. Based on

practical operating experience，a timely dynamic adjustment mode should be established to ensure the stability of process parameters and the stable water quality of the phenol cyanide wastewater treatment station.

This paper addresses the problems in the wastewater treatment process and presents a plan for improvement. The proposed changes have reduced the operating costs of the wastewater treatment system，enhanced its stability，and the COD of the effluent meets the requirements for advanced

membrane treatment of the effluent.

The fibre bed dust and mist eliminator is capable of removing tar，dust，naphthalene and other substances from coke oven gas. It is characterized with high removal efficiency and easy maintenance，solution to low removal efficiency，frequent adsorbent replacing and difficulty in replacing the conventional equipment. It also minimizes compressor failures caused by incomplete COG purification as well as the frequency of air valve cleaning.