Coal is heavily used as raw material in cokemaking and ironmaking.The by-products and asphalt generated can be mainly used for producing carbon materials.This paper introduces the development and application in carbon anode material,needle coke and carbon composite materials.Cokemaking enterprises,therefore,could take this privilege by using their own raw materials to get an access into the carbon industry,which could extend the industrial chain and increase the added value of products.

There are three typical coking coal elected in order to research transformation characteristics of the sulfur in coking coal in the process of washing and pyrolysis.At first stage,the migration law of sulfur in washing process is studied.At second stage,the migration of total sulfur,pyrite sulfur,sulfate sulfur and organic sulfur in clean coal in pyrolysis process was studied by the experiment of 1 kg test oven.As a result,pyrite sulfur in raw coal is mainly removed during coal washing.In the process of pyrolysis,pyrite sulfur removal is essential to the reaction when temperature is below 700 ℃,but organic sulfur removal plays key role when temperature is above 700 ℃.In addition,there occurs a chemical phenomenon that pyrite sulfur and fatty sulfide are converted to thiophene sulfur in the high temperature region.

An enclosed type coal yard with large span could be in structure of space grid,latticed shell,spatial pipe truss structure,etc..Based on the actual project case,this paper introduces the designing process for spatial pipe truss structure in terms of load value determination,load combination,structure analysis and joint design,etc..Its advantages are also discussed in aspect of steel consumption.

This paper,by using imaginary plane method,studies the change law of the coefficient for angle of radiation in raw gas exchanger for ascension pipe.The result shows that in heat exchanger of the ascension pipe,the coefficient for angle of radiation of the oven chamber hot coke opposite to the side of heat exchanger goes down with increasing height of the ascension pipe;i.e.with fixed height of the ascension pipe and increasing length to diameter ratio,the coefficient for angle of radiation of the oven chamber hot coke opposite to the side of heat exchanger decreases; with fixed diameter of the ascension pipe,there would be not obvious change in this coefficient;when the length to diameter ratio is fixed,this coefficient will increase with increasing height and diameter of the ascension pipe.When the gap increases between the hot coke surface and the lower flange of the ascension pipe,this coefficient will decrease accordingly.

According to the types and characteristics of coke oven heating level,and in view of scenarios for different heating levels and free space temperatures of several types of top-charge batteries,as well as based on the empirical value from 7.63 m battery as calculation basis for 7 m battery,a reference heating level for the 7 m battery is put forward.

Based on auto position identification for tripper car and by using LAN and INTERNET,integration and optimization can be done for coal handling,storage yard,coal preparation,tripper car,sensor and controller,etc.,so as to realize informatization,remote control and intelligentization for the coal handling equipment.

According to the actual situation in production,this paper calculated the stress of impeller bearing of the CDQ gas circulating blower,discussed the bearing types and lubricating performances as well as optimized the objective function based on multiple parameters setting,which can be used as reference for maintenance and procurement of the bearing.

In view of hard cleaning for the blockage at pipe fittings,such as branch,orifice plate and nozzle on the COG return pipeline caused by coal tar and naphthalene,an easy-to-operate cleaning device is designed to keep gas channel smooth and meet the requirement for normal heating,which not only improves the cleaning,but also greatly shortens the cleaning time.

In order to ensure 10 mg/m3 emission standard from the charging deduster stack,high-efficiency drapery filter bag is adopted by comparison for different solutions,which not only meet emission standard,but also effectively improves technical and economic index under the precondition of remaining the deduster structure unchanged.

By using the signals of lifting for incremental encoder and speed of traveling motor of the frequency conversion system of the CDQ crane,the distance of lifting and traveling for the crane can be calculated and the deviation can be compensated so as to keep the crane in normal operation in case of failure of the absolute encoder for safety purpose.

Basic working principle of laser oxygen analyzer and ZrO2 analyzer are introduced as well as their advantages and disadvantages in process.Two types of on-line oxygen analyzers are studied for the problems occurred during selection and application as well as improving measures according to the process features in desulfurizer liquid incineration for acid-making.

The causes of blockage of the benzene hydrogenation heat exchanger are introduced,and the raw materials,demineralized water,parameters and washing wastewater are analyzed.Measures are taken,such as on the one hand,the quality control of feedstock is strengthened,and on the other hand,the water injection point and its amount are adjusted in time,so that the ammonium salt in the shell side of the pre-evaporator can be eliminated.

It was found that the high content of indene in technical naphthalene is also the reason of the high content of non-volatile matters in the technical naphthalene.The optimization of process parameters can reduce the content of indene in the technical naphthalene, and effectively reduce the content of non-volatile substances in the technical naphthalene from 0.07% to 0.05%,up to the standard of first-class product.

This paper introduces the situation of residue removal from crude benzol tank and evaluates the potential risks during the removing operation.Measures are taken,such as modifying the existing facilities, removing the residue out of the tank,recovering the crude benzol,which can greatly save treatment cost and can be used as reference for similar plants.

During the process of stripped water cooling,the circulating water line and waste water line would be prone to blockage due to scaling,which would decrease heat exchanging efficiency.It is studied that pre-cooling circulation for the stripped water plus soft water heat exchanger can solve this problem.

In this paper,tar residue formation and the necessity of its treatment are introduced.The results show that the treated tar residue has low water content,high looseness,and easy mixing in coal blending.When the treated tar residue is added into coking coal,it will have small range in coal quality fluctuation,stable quality of coke and higher recovery of coal tar,which not only achieves better economic benefits,but also improves the operating environment.

Desulfurization waste water from COG desulfuration unit contains high concentrations toxics,which,if discharged without being treated,would jeopardize biochemical system running even deactivate the biochemical system.Hanbao Coking Plant cooperates with Chinese Academy of Sciences to study the detoxification for the desulfurization waste water of vacuum potassium carbonate process and treat the high sulfur and cyanide waste water by sedimentation and coagulation technology,which has achieved a good result.

Through research and options comparison regarding modification on CDQ dedusting system for ultra-low emission,a foldable filtering material with film is selected for the filtering candle,which can increase the filtering area of the bagfilter,reduce the filtering air speed and resistance so as to realize ultra-low emission.Furthermore,the dedusting fan speed can be adjusted for power saving.

This paper introduces the composition of CDQ bleeding gas,analyses the pollutants containing in the gas,and puts forward two solutions for the bleeding gas treatment,i.e.Pre-desulphurization process before dedusting and post-desulphurization process after the dedusting.It also compares the two processes in terms of applicable range,investment,operatability,and influencing factors,etc..

This paper introduces an additional biological denitrification unit to the coking wastewater treatment station, which can further reduce the total nitrogen content in the effluent of the coking wastewater treatment system.The total nitrogen removal efficiency can reach 88.04%.The total nitrogen content in the effluent of the coking wastewater treatment system can reach 15.78 mg/L,which is less than the limit of 20 mg/L in the Emission Standards of Pollutants for Coking Chemical Industry.