A charging device is developed for high temperature materials continuously charged into shaft chamber in principle of CDQ process.This charging device can realize uniform material distribution of the shaft chamber with rotary distributor as a core and by using additional functions such as single-ring distribution,multi-ring distribution and discharging point adjustment,etc..Main structures are arranged outside the chamber,which can ensure long service life of equipment and safe and easy maintenance.

For products restructuring of 58-I type coke oven, transforming from producing FC83 coke to FC80 coke and low cost briquetting technology without binder is developed.A pilot test by 200 kg oven shows that M10 of coke is improved by 0.40% and the CSR is increased by 1.25% under the precondition of 25% coal mixed into briquetting coal and with the briquetting pressure of 25 MPa.

Based on the experience of hot clear-up and repair for the blockage in connecting duct of 6 m coke oven,this paper introduces the detailed working procedure,including heating wall thermal insulation,combustion chamber temperature control,critical points for the heating wall cut-out and repair and refractory selection,etc.,which can be used as good reference for the similar projects in the future.

Production management and experience on several oven types proves that the damper in ascension pipe and heat gas cock in the cellar can be individually regulated according to coking time so that reduction is realized in terms of the set pressure of gas collecting main,standard temperature of heating wall and the temperature of free space on oven top so as to improve coke quality and by-produces recovery ratio and minimize the NOx formation in the emission. 

According to analysis of the factors influencing heat consumption for cokemaking and based on actual production,measures are taken,such as appropriately lowering coke cake central temperature,optimizing flow transmitter pressure piping,lowering free space temperature and enhancing oven refractory maintenance,etc.,which remarkably reduce the heat consumption for cokemaking and propose experience and reference for energy saving and consumption reducing of aging batteries.

In view of the current problems in repairing the through-holes in middle flues of coke oven，solutions are given in aspects of thermal insulation device，refractory brick selection and oven temperature control，etc.to improve the repairing quality and efficiency by replacing the damaged part，which can minimize the damage to the coke oven refractory brickworks.

Foreign substances carried with coke would cause blockage of belt conveying system and disturb stable running of downstream units even debase iron making in blast furnace. Measures are taken to dramatically minimize the frequency and possibility of bigger foreign substances from the upstream units into coke as well as come-off of cast stone bricks from coke bin and surge hopper, which has achieved a remarkable result.

The common problems of conventional rotary seal valve for CDQ system are analyzed.A new rotary seal valve is developed by optimizing the original design and improving its structure so that not only the abrasion-resistance and service life of the equipment can be improved,but also its cost of operation and maintenance as well as failure rate can be minimized.

ue to the effect of CDQ bell to coke distribution into the CDQ chamber, study and analysis were made in this paper.Test was done for coke distribution upon different bell sizes.The result shows that the inhomogeneity of coke distribution gets worse with CDQ chamber diameter increasing.The key to solve the temperature segregation inside the chamber and to improve the system resistance distribution is to select appropriate diameter CDQ bell for the coke distribution.

This paper analyzes the correlation between pushing current and the pushing resistance to determine the position at the maximum pushing resistance.The mechanism of pushing resistance and leveling bar returning resistance is also analyzed to respectively calculate component forces.The theoretical calculations can be used as guidance for process design and equipment selection for the pusher machine.

With trend of large-capacity COG purification system in coking industry,this paper discussed the advantages of large-capacity COG purification system and analyzed the operation ever since the commissioning of the COG purification system for Baosteel (Zhanjiang) Iron & Steel.The COG purification system with capacity of  1.7×105 m3/h runs successfully in Baosteel (Zhanjiang),with H2S content in COG less than 100 mg/m3throughout a year,and with all the other indexes conforming to design requirement.

Through experiment, the heat transferring medium and sample forming in the universal method are improved so that more accurate softening point of the asphalt with softening point ≥157 ℃ can be determined.

Analysis is made for the high content of toluene insolubles and quinoline insolubles in the modified pitch and cause of impacting the quality is found. Measures have been taken to improve the quality of the modified pitch,such as lowering the free space temperature on oven top and reducing the pressure of HP ammonia liquor,etc..

This paper simulated direct and indirect heating ammonia water distillation process by using Aspen Plus software.The simulation results were presented.Moreover,the equipment selection & cost,process energy consumption and operation economy between direct and indirect heating distillation were also compared.In conclusion,direct heating distillation had less equipment investment and lower energy consumption.However,indirect heating distillation had lower operation cost.

This paper studies the factors impacting the preparation for Meso Carbon Mirco Bead (MCMBs),such as reaction temperature,reaction time,solvent categories and surface heat treatment,etc..The result indicates that the yield of MCMBs increased when the temperature rosed at first,and became the maximum at 430 ℃.However,it decreased with the temperature went on increasing.The particle size of MCMBs increased with the adding react time and the smoothness of the surface on MCMBs could be improved through heat treatment.And the process safety could be improved when N,N-dimethyl aniline (DMF) replaced toluene.Under the right condition,MCMBs with 10~15 μm particle size and specific capacity more than 350 mAh/g could be obtained.

Rare earth metals have abundant energy levels and special extra-nuclear electronic structures.It has been extensively studied in denitration catalysts.In this paper,the application of rare earth metals as active components and co-catalysts in low temperature denitrification is reviewed.The role of rare earth metals in sulfur resistance is analyzed.The development prospects of rare earth metals in low temperature denitration catalysts are prospected.

The cause of smoking from the chimney of stamp-charge battery is analyzed.The smoking from the chimney can be eliminated by taking effective measures and re-calibrating the heating system for the battery.Furthermore the contents of NOx and SO2 in the chimney emission can be reduced to an acceptable range.

In order to prove the feasibility of using stilled water in DeNOx reactor,a lab test was done for ammonia distillation to analyze the composition of distillate.The result shows that the stilled water after ammonia distillation contains oil phase,which would poison the catalyst and cause higher cost in adding NaOH for neutralization reaction due to sulfur ion,chorion and others metallic ion in the purified ammonia liquor.In conclusion,the stilled water is not suitable for application in coke oven waste gas DeNOx.