This paper introduces the advantages,mid\|testing result and industrial equipment utilization of integration of CMC and air classification in manner of total\|boiling and vibrating push\|in,with waste gas flue as hot carrier. It also proposes process appraisal system,analysis of the impact and solution of CMC to coke oven production and gas purification process as well as technical support for the CMC promotion.

In this paper,the impact to coke properties by adding boron homologues to blending coals is studied. The result shows that the caking of blended coal and cold strength of coke would get worse as BO、BA and BX are added and the coke thermal properties would also appear degradation trend with adding amount increased. It also indicates that TD added to the blended coal would not impact the coal caking and cold strength of coke but can obviously improve the thermal properties of coke. Coke optical texture test shows that TD can promote the development of coke anisotropy. Furthermore the XRD analysis shows that TD can upgrade the graphitization of coke.

This paper analyzes the influence of factors such as central temperature of coke cake,gas space temperature,charge moisture,excess air coefficient and waste gas temperature to heat consumption during coke making.Measures to reduce heat consumption and to improve heating efficiency of the battery are proposed.

The application of large coal silo for coking plant of Zhangjiagang Hongfa Group Co.Ltd.has been introduced in this paper where reasons of coal blending error are found,i.e.coal silo bridging,belt scale failure and coal sticking to the belt and the causes to bridging and relevant solution are also given.

For higher charging volume of individual oven for JN60-6 battery,this paper provides measures,such as adjusting fineness of blended coal,stabilizing moisture of the blending coal and optimizing charging & leveling,etc.so that the individual oven charging volume can be increased,oven top space temperature can be reduced,tar & crude benzol capacity can be improved and higher economic benefit can be obtained.

Several calibrations for common coke loss of ignition (LOI) are described in this paper.A new calibration is proposed which can be used for statistics at any time without measurement of carbon discharge amount, with precision up to the requirement of production.A proposal of LOI control is also put forwarded.

In this paper, design data,process flow and operation experience in China etc.are analyzed that performance guarantees of a coking plant for a steel company abroad can be achievable,such as production capacity,coke fine rate,coke quality,equipment operation rate,water consumption per ton of coke production,impurities content in purified gas,treated water quality,automation system operation rate and electrical system operation rate,etc..

Regarding to the problems of modified dedusting system such as oven wall damage,pipe leakage,high resistance in the dust catcher,this paper analyzes the reason to those problems considering the process principle and equipment condition of de-dusting system.The problems are well solved by changing process parameters of coal preparation,replacing refractories and increasing the pressure of compressed air in the dedusting system,so that normal operation of the dedusting system is ensured.

According to the fact that some problems are found in the protection system of scraper conveyor for coke oven dedusting system,this paper proposes an improvement by canceling the intermediate relay or by using three-wire proximity switch,which is characterized with low cost,less failure and reliable wiring so that reliability and stability of the dedusting system can be remarkably improved.

This paper analyzed adjustment for replacement gas and oven temperature for an optimal solution due to multi-time gas replacement for coke oven battery each year due to blast furnace maintenance so that time consumption for gas replacement can be reduced to two hours and that for oven temperature adjustment can be cut to five days.

This paper introduces a method of selecting suitable crane to be accessible and approaching to the lifting site due to the narrow space at the CDQ construction site,which can save lifting cost,make installation easy and shorten lifting time.

The tubular belt conveyor is described in this paper in aspects of structure,working principle and technical data; analysis and decisions are also made for the belt route,driving unit arrangement and speed control mode so that feeding requirement of the blast furnace can be met,pollution can be reduced and operational cost can be cut down.

In view of the problems in belt scales with low precision and poor stability,this paper introduces an advanced array type belt scale for trade based on the cooperation between Jingjiang Zhongda Coke Products Co.Ltd.and Nanjing San’ai Co.Ltd.,as a solution to the low precision in measurement,which is characterized with high precision and good durability.

In this paper,the features of coke oven proper is analyzed during oven temperature holding and the management,precautions and solutions are also described during the temperature holding in terms of oven temperature,bracing system and hot repair,etc.together with the feasibility of the oven temperature holding when no coal being charged.

This paper summarized the defects of waste heat recovery unit from coke oven waste gas flue at the initial stage after commissioning and proposed some measures such as by increasing holes and cross section of pipes to reduce system resistance,by using VVVF to increase suction of common waste gas flue and by adding additional motorized flap valve to cut off waste gas circulation,etc.so that the waste gas heat recovery unit can reach up to designed target.

In view of big impact of coal moisture to coal cake shaping for stamp charge battery, automation system of water-adding for coal moisture control is developed.This paper introduced the principle,process flow and main equipment of the system,suitable for lump raw material production, which obtained a perfect integration of on-line monitoring and automatic control, a solution to the instability of manual operation,a stable moisture of coal to be charged and good coal cake shaping.

As the Elizabethkingia sp.strain W8 isolated by our lab for the dominate bacteria of our further research,the degradation kinetics and biodegradation pathway were studied.The result shows that the optimal temperature,initial pH value and salt concentration for W8 is 35℃,pH 7.0 and 0.5% respectively.When the initial concentration of DBP was between 50 and 400mg/L,thestrain on the degradation of DBP is tested in line with the Gr.1 Monod kinetics model.The FT-IR analysis demonstrates that the degradation of DBP most likely follows the pathway: DBP→MBP→PA.

This paper analyzed the disadvantages of conventional ammonia stripping process by steam and described the improvement of ammonia stripping by heat transfer oil,by tubular furnace and by negative pressure from waste flue gas heat.The technologies of heat pipe,coke oven waste flue gas and coal water heat exchanger are successfully unitized for 800 000t/a coke production system,by which the waste water treatment cost can be reduced by 40%,stilled water amount can be reduced by 25%,the quality of treated water can be improved so that it’s beneficial to the waste water reutilization and zero discharge of waste water.

This paper presented further processing for naphthalene oil in China and abroad,summarized rectification method,crystallization method,hydrogenation method and separation technologies,such as liquid membrane separation,supercritical fluid extraction,etc.to be used for naphthalene oil separation.It also proposed a combination of conventional process and the advanced separation technology based on the related analogues formed by the naphthalene and other components in the naphthalene oil in the hope of improving naphthalene oil separation and process conditions with preconditions of optimized process,simplified production and energy-saving & pollution reduction.

This paper outlined the behaviors of medium and low temperature coal tar,its hydrogenated oil products and the four main coal tar hydrogenation processes in recent years.It also analyzed the economic benefit for a project of 1M t/a coal tar hydrogenation.The result shows a good economic benefit,i.e.the net profit is 103 917 000 yuan per year and the payback period after tax is 5.4 years.

Waste water from cokemaking, after bio-treatment, deep treatment and reuse of reclaimed water,can be recycled as makeup water of circulation for new water saving and utilization of waste water zero discharge and reclaimed water reuse,which achieves economic benefit and social benefit.

In view of high energy consumption of the gas exhauster running at working frequency,this paper described an innovation of frequency converter for gas exhauster.The modified gas exhauster can be in stable operation,which realizes energy saving by controlling the exhauster speed according to different loads.

This paper described that cast iron bubble plate column for the existing AS ammonia stripping process has been modified,plus a high efficiency re-boiler for indirect ammonia stripping,which is characterized with rational process,simple operation,easy maintenance,long service life and energy saving,etc..

This paper introduces the configuration and philosophy of constant pressure system via VVVF,i.e.a frequency converter is used for fuel gas delivery which can alleviate the equipment noises and labor intensity,lower the current and mechanical impact when the equipment starts/stops,extend equipment service life,ensure emergency supply of natural gas and achieve remarkable performance of energy-saving.