The coal blending expert system is established based on the coke quality prediction module and coal blending ratio optimization ratio.It includes such functional modules as data collection，data storage，knowledge base and inference engine，etc..It can predict the dust content，sulfur content，M40，M10，CRI，CSR of coke，and rapidly work out the best coal blending ratio.The practical application showed that the foreseeing deviation of coke quality is less than 6%，which meets the production requirement.

Application scheme of high quality low price coking coal is determined through pilot coke oven test.The scheme is finally applied in coking industry,so that the high quality low price coking coal can be used in an innovative way,and the resources of coking coal is widened.The cost for producing coke is greatly reduced under the precondition that coke quality is stabilized.

Environmental problems during coking production of Masteel coke oven battery are described.Dust is collected through the methods of coke screening for battery No.1~4,optimizing CDQ de-dusting,technical improvement on pushing de-dusting of 7.63m coke oven battery,and construction of 3 stationary bag house stations for charging and pushing of battery No.5~6.In addition,measures such as strengthening the maintenance and management of aged ovens,using new glazed refractory and improvement on knife edge can effectively minimize the leakage of intermittent smoke.

Study on the flow and heat transfer process shows that the zero pressure level of CDQ system is located in the corbel zone,so the distribution of gas flow in the cooling chamber is not only related to the voidage of moving coke bed,but also related to the layout of regulating bricks at the outlet of corbel zone and negative pressure.Heat transfer between gas and coke in CDQ chamber can be enhanced by prolonging the stay of carrier gas in high temperature area and improving the gas flow distribution between the carrier gas and coke in the low temperature area.

Study and improvement have been carried out regarding to the problems found during operation of CDQ discharging device.After improvement,failure of the equipment is reduced,and the running stability of the system is improved greatly.The production requirement can be met.This paper provides technical reference for the reliable and stable running of similar process equipment.

Regarding to the problem of low temperature at oven end in case of prolonged coking time,the technology of supplementary heating of end flues is adopted to maintain the temperature of oven end ≥1 100℃.As a result,the production environment of coke oven battery is improved,and consumption of heating gas is reduced.

Regarding to the problems of coke oven proper such as denudation of oven wall,gap between oven bricks,crack on the crossover bricks,chopping and damage of bottom bricks,unroofing renovation technique is adopted to repair coke oven battery under hot state.The result is good and the coke oven battery after repair is in normal operation.The application of this technique in Jiusteel has reference significance for other coking plants.

This paper studies the influence of thin oven wall of 6m coke oven battery to coke oven proper strength,coking time,coke output and power consumption.For coke oven battery with thin oven wall,after careful calculation and with suitable measures adopted,coke output can be maintained,and at the same time,gas consumption and environment pollution are reduced.

The automatic temperature measuring system is improved after analyzing the problems in the control process and taking such measures as line protection，temperature deviation treatment and compensation，etc..As a result，online monitoring by computer can be ensured and automatic temperature measuring system in heating up of 7m coke oven battery is realized.

This paper introduces the application of automatic monitoring method in the fields of online monitoring of toxic，harmful and combustible gas，automatic recording of pushing，infrared thermometry and counting of stamping hammers.Good results have been achieved and the automation level of production is improved.

Based on the automatic detection of vertical flue temperature，net coking temperature judgment and coke cake temperature monitoring，an automatically optimized heating control system for coke oven battery is established.Through optimized control，the heating gas can be regulated timely to maintain stable oven temperature.Meanwhile，it helps to control the maturity of coke，improve coke quality and timely discover the abnormal oven.As a result，the automation level and stability of coke oven are improved.

The automatic measurement system for coke cake center temperature installed on the coke guide car can reflect the maturity of coke cake timely.Application of this system reduces energy consumption，labor intensity and ensures safety.

CARMA is adopted for modeling the relationship between the valve location and pressure of single gas collecting main.Model order can be determined by adopting modeling principle with large information entropy.Parameter estimation is carried out taking minimizing the quadratic sum of deviation values actual value and calculated value as objective function，so as to identify the model of gas collecting main.The comparison result between predicted pressure and actual pressure proves the effectiveness of CARMA in the control of gas collecting main pressure.

This paper analyzes three benzol production processes. Through comparison it can be seen that negative pressure debenzolization process with steam has lots of advantages,such as improving the efficiency of debenzolization tower,reducing emission of SO2,preventing blockage of equipment and reducing operation cost,and so on.

Through analysis of the features of coke oven flue gas,this paper proposes a kind of integrated process for desulfurization,dedusting,denitration and thermal decompositioin of coke oven flue gas,and expounds the system composition and characteristics of the process.Analysis and comparison shows that this process has advantages of simple system,compact workflow,easy operation and less maintenance,which could effectively solve the removal problem of SO2 and NOx in coke oven flue gas.

This paper studies the influence of reaction temperature,reaction pressure and reaction time on the content of mesophase in modified pitch.The experiment result shows that the content of mesophase increases along with the increasing of reaction temperature and pressure and reaches maximum at 0.22MPa,and increases as reaction time lasts and reaches maximum at 8h.Under suitable condition,modified pitch containing 1.22% mesophase can be obtained.

This paper analyzes the reason for the problems existed in the BTX extraction and distillation process of crude benzol hydro-refining plant and proposes appropriate renovation methods.The plant runs well after renovation,and the problem of solvent inactivation is solved.

This paper introduces HPF desulfurization and vacuum potassium carbonate desulfurization and compares the advantages and disadvantages of these two processes.Analysis shows that HPF desulfurization has the advantages of low investment,simple operation,but it has the disadvantages of high operation cost,low quality sulfur produced,large amount of waste water generated and serious pollution problem; while vacuum potassium carbonate desulfurization needs higher investment,is complex in process,but it cost less for operation and the product sulfuric acid can be directly used for ammonia recovery.

This paper introduces the process of heating with coke oven gas and purge gas.The influence of purge gas is analyzed,and the result shows that mixed with purge gas,vertical heating of coke oven is improved,temperature fluctuation in the coking chamber is reduced,labor intensity is reduced,pressure of main pipe in the cellar is increased,the longitudinal temperature meets the specified temperature,and there is no affect to the suction force of flue,formation of graphite or pushing.Therefore,this process brings remarkable economic benefit.

This paper introduces the upgrading process of traditional intermittent gasification into rich oxygen continuous gasification,discusses the problems existed during running and corresponding solutions.Rich oxygen gasification process has the advantages of less investment,simple operation and less pollution.

This paper introduces the process flow and feature of sulfuric acid making process with low quality sulfur and desulfurization waste water,and analyzes main parameters such as technical and economical indexes,emission indexes and environment protection indexes.By this process,the problems existed in the recovery of low quality sulfur and in the treatment of by\|product salt solution of desulfurization are fundamentally solved,the efficiency of desulfurization and cyanide removal from COG is effectively improved,discharge of waste is reduced and the environmental protection level is increased.

To meet the requirement of Emission Standard of Pollutants for Coking Chemical Industry GB 16171—2012 on emissions discharged to the atmosphere,upgrading measures are taken for ammonium sulfate unit,including improvement on production system switching and waste gas washing and purification unit.After upgrading,the ammonia and particle contained in the waste gas are lower than the limit value specified in the new standard.