It analyzes density,porosity,reactivity and micro-structure etc.of stamp-charged coke and top-charged coke,concluding stamp-charged coke is of high apparent porosity and density.Alkali metal functions as catalyst in coke loss reaction and it is more catalytic for stamp-charged coke than for top-charged coke.

This paper introduces the process and characteristics of the existing coking process and analyses the influence of crushing,briquette coal,coal moisture control (CMC) and coke dry quenching (CDQ) process on improvement of coke quality from the perspective of laboratory and industrial production,which provide technical references for the future coking production and process selection.

This paper describes the background,purpose and performance of adopting coal blending based on specific coal mines.By selecting specific coal mines and managing coal batch,7m coke oven production based on specific coal mines can be realized so that coke quality can be stabilized and high quality coke can be produced for large capacity blast furnace production.

Reasons for the collapsing of coal cake are analyzed in the aspects of coal blending，stamping，charging and maintenance.Coal charging process is improved and optimized according to actural situation.Ratio of successful coal cake is improved，and collapsing of coal cake is greatly reduced.

It discusses factors influencing SO2 online monitoring at chimney of JN60-6 6m coke oven battery and generalizes analytical methods and preventive measures on failure of meeting standards regarding those factors.

Regarding  the problems of CDQ circulating cooling water such as pollution of makeup water，poor drainage of waste water and ineffective side filtration device，correct routine operation of circulating cooling water and reasonable making up and discharging measures are taken，so the volume concentration is effectively controlled.The discharged waste water can meet the requirements stipulated in GB 50050—2007 and can be properly recycled.

This paper analyzes the reasons of individual corbel zone blockage of No.2 coke oven of Bayi Steel Coking Plant. Starting from the bottom of vertical flue,by using the method of digging and repairing of coking chamber wall to open blocked corbel area,which could improve the heating uniformity and prolong the service life of coke oven.

This paper introduces steel rope replacing for CDQ system.The optimized maintenance solution enables a rational annual maintenance schedule for the CDQ system,which minimizes the replacement time,extends the annual maintenance intervals at most and ensures a safe production in the long run.

This paper introduces a technical process of waste heat recovery system from coke oven ascension pipes and proposes a solution to the problems such as ascension pipe leakage，inner wall carbonization，low efficiency in heat exchanging between gas and liquid phase，etc..The upgraded system after commissioning runs good with remarkable results in terms of energy saving and environmental protection.

Comparisons are made among different proposals and different investments for foundation treatment in large-scale backfill for civil work of coking plant. A rational method for foundation treatment is selected for speeding up construction progress and saving construction investment.

 In view of repairing difficulties of easily damaged large expansion joint of CDQ primary dust collector and boiler during production,targeted improvements are made to simplify the expansion joint structure and improve its maintainability,thereby prolonging the service life of the expansion joint.

In view of the cleaning difficulty and incomplete cleaning of raw gas pipeline bottom sediment，a new type of cleaning tool for gas pipeline is designed，combined with flushing of high pressure ammonia water，which can enlarge the cleaning range，effectively shorten the cleaning time，improve the cleaning efficiency and reduce the labor intensity of cleaning.

It studies dedusting system of top-charging coke oven battery in aspects of safety and typical charging de-dusting accident to improve safety design and raise  awareness of safe operation.It aims to tackle high risk of charging dedusting operation by taking preventive measures.

Light benzene end point measurement by distillation method is an official measurement as per Chinese national standard, during which errors would occur and the test result would be inaccurate.This paper analyzes the testing details and finds out the source of errors and puts forward a solution to minimize the errors.

Several technologies for secondary treatment of cokemaking waste water are analyzed in this paper that the double membrane method is considered suitable for current plant operation.Its advantages and disadvantages are also introduced in the process of cokemaking waste water treatment.Practical experiences are generalized for further development.

Regarding the problems found during operation of the vacuum potash carbonate desulfurization system，countermeasures are taken based on analysis and calculation. As a result the content of H2S after desulfurization column is reduced.

According to the analysis of benzol scrubbing process,the main factors influencing the scrubbing efficiency are found out.For the problems of high benzol content after the scrubber,low benzol content in rich oil and low spray density,an additional circulating stage of semi-rich oil is provided in the benzol scrubber.The problem of high gas temperature at downstream of the scrubber is solved by adjusting the chilled water quantity and establishing regular cleaning rule for the cooler.

It is analyzed in this paper that the blackening of vacuum potassium carbonate desulfurization liquid resulted from excessive high content of ammonia in gas.A solution is proposed that a buffer tank is installed by the desulfurization column for changing the blackened desulfurization liquid and controlling the ammonia content at the gas inlet which could effectively solve the problem and stabilize production.

In this paper, the method of managing heavy phase sediment is introduced, recycling sediment can not only reduce production cost and increase economic benefit, but could solve environmental pollution as well.

The problems of the coking waste water circulation system are introduced. By taking measures such as optimization of technological process and replacement of pipes and dehydrator, the coking waste water can be recycled in closed circulation to realize zero liquid discharge, while the sludge will be entirely sent to the coal blending system for coal blending and coking. Such upgradation reduces energy consumption and recycles resources.

Fenton oxidation process is used for the advanced treatment of coking waste water.After treatment,the indexes of the waste water are as follows: COD:60～70mg/L,ammonia nitrogen <5mg/L,suspended matter:15～30mg/L.The quality of discharged water meets the requirements stipulated in national standard GB16171—2012 Emission standard of pollutants for coking chemical industry.

This paper studies the nature and behaviors of micro organisms’ cultivation and breeding by SH-A process during coking waste water treatment.It also analyzes the influences to the micro organism growing,such as cultivation time,temperature,pH value,dissolved oxygen,etc.,which provides applicable conditions for nitrous acid growing in biological denitrification.