This paper introduces the pilot oven research on coal blending structure in long coking time of 6 m and 7 m batteries in Handan Coking Plant in new normal state of limited production for environmental purpose.Coke quality prediction model and coal blending composition adjustment model are defined under long coking time of different oven types.Application is done in production, which shows a good result.

This paper introduces the actual situation of the experimental burning of the semi-coke by using a high-rate circulating fluidized bed boiler.Discussion mainly focuses on operation adjustment,boiler energy efficiency and environmental performance,etc..Test result shows that the thermal efficiency of the semi-coke fired high-rate circulating fluidized bed boiler can reach up to 88%~90%;NOx emission concentration is higher than the designed emission limit of the boiler,which should needs to take measures such as SNCR and SCR to meet the requirement for environmental protection;the emission of SO2 is extremely low,thus there is no need to use environmental equipment.After analysis,selecting an appropriate feed particle size distribution and the air excess coefficient are effective measures to improve the efficiency of the semi-coke fired circulating fluidized bed boiler so as to provide suggestive ideas for development and operation of the semi-coke fired boiler.

In view of the problems in manually selecting the setting values of GCM negative pressure for 7.63 m coke ovens, improvement was done for the GCM pressure regulation to realize automatic changeover under 3 pressure values for 6 sections of GCMs in three durations such as production or maintenance so as to improve automation level for super-high capacity coke ovens.

Factors affecting coke oven chimney emissions are analyzed in this paper,which mainly result from heating wall leakage of coking chamber and combustion chamber,oven end leakage and coking chamber operation under negative pressure,etc..The chimney emission must be thoroughly controlled to meet environment regulations for sustainable development.

The consumption of washing oil per ton of benzene recovery was reduced from 70 kg to 30 kg by improving the process of benzol stripping and optimizing operation parameters.Crude benzol recovery rate was also increased.With negative pressure collection technology,the gas vent from top of each tank in the benzol unit can be transferred to the gas system before the primary cooler.As a result,VOCs emission can be discharged as per environmental regulation,environment protection level was upgraded to a new high.

This paper introduces the operating conditions of acid-making process with low quality sulfur and desulfurization liquid waste incineration in Shandong Tiexiong Metallurgical Technology Group.It also describes the existing problems and solutions.This acid-making process completely solved the problems in low quality sulfur recycling and secondary salt waste liquid disposal in ammonia wet oxidation desulfurization process.

With rapid development of lithium-ion batteries,improving electrochemical performance of graphite anode is of great importance.Modification on the coating of natural graphite can effectively improve the electrochemical properties of graphite anode.Coal-based soft asphalt has a wide range of sources and low price,which is a high-quality raw material for the preparation of coated pitch.In this paper,a method of preparing coated pitch from coal series soft asphalt is introduced and influencing factors in the test are discussed.The coated pitch can effectively improve the electrochemical performance of graphite anode,and a new way of preparing coated pitch is proposed.

To solve the problems of desulfurization capacity reduction caused by monoethanolamine (MEA) deterioration in the COG desulfurization system, and the increased consumption of MEA due to thermally stable salts generated in the process, physical properties of the amine liquid and its major composition are determined through physical and chemical analysis of desulfurization of amine liquid.The thermally stable salt content of amine solution in desulfurization system can be maintained around 1% by the dynamic amine solution purification process of filter element-activated carbon-anion exchange resin. 

Introduction is made for three main types of purification and drying systems in air compressor station of coking industry，i.e.waste heat regeneration，micro-heat regeneration and heatless regeneration.Comparison is also made for the three purification and drying systems in aspects of compressed air yield，power consumption，water consumption，air consumption for the internal system，investment，land occupation and operating cost，etc.，which would be used as reference in final decision for selecting the system in project.

Based on the actual situation of microcrystalline adsorption of COG in coking plant of Laiwu Iron and Steel Co.,Ltd.,a safe and effective operation scheme of regeneration operation is formulated through process analysis.Under the premise of ensuring normal production,safety and environmental protection,the adsorption effect of coke oven microcrystalline is ensured

Water sealing liquor is deveopped by EO pretreatment to reduce the toxicity of pollutant in the waste water. Biological enzymes (BZ) is added to the AO system to improve sludge activity for a better performance.The practice shows that EO+A2O2+BZ process works very well in phenol-cyanide containing waste water treatment.

In order to meet the requirement for ultra-low coke oven flue gas emission,active coke desulfurization and denitrification technologies are adopted for 7.63 m coke oven in Masteel.In this paper,analysis is made to the problem of regenerating fan and abnormal temperature of the active coke based on actual operations of coke oven and active coke desulfurization and denitrification.Improving measures are also taken with good results.

This paper mainly introduces the process of high-efficiency active coke in coking wastewater treatment,which has advantages of good effect of absorption and flocculation,reasonable design,high automation level,with higher degradation of COD removal than secondary sedimentation tank by 56.2% in effluent discharged,with clear color and no suspended solids.

When lifting the coke bucket by crane and charging the red-hot coke into the CDQ chamber through charging device,escaping dust is found at the joint between the coke bucket lid and the CDQ chamber,around the coke bucket,and at the joint between the charging chute and the skirt of the charging device,which is caused by actual pressure fluctuation varying with coke charging at the CDQ chamber mouth.In this paper,through the optimization of the movable dedusting duct sealing device,the improvement of the deformation resistance of the movable hood and the innovation of the chute top sealing device,the dust escaping from the charging device can be effectively controlled,and the ambient environment can be improved.