This paper described coal blending with coking coal,1/3 coking coal,fat coal,lean coal and long-flame coal,with bulk density of 0.7g/cm3 and 1.0g/cm3 and analyzed the impact to coke behavior under different bulk densities and different adding amount of low rank coal by using 2kg testing coke oven for analysis of cold strength and thermal property of coke.The results show that the cold strength and thermal performance of coke get worse after blended with low\|rank coal,and it changes less when blended with low\|rank coal less than 5%,but it can be improved by increasing the bulk density of blended coal.

To explore a comprehensive,clean and integrated utilization of lignite,the theory of lignite liquefaction and influencing factors are analyzed,and the staged conversion technology of lignite that part of lignite is liquefied and the residual char is gasified combining with the wet gasification is proposed.The result shows that the lignite is very active in hydrogenation liquefaction.By combining the technology of gasification and liquefaction,lignite can be utilized efficiently.

This paper describes the production process of coal-based needle coke,taking coal tar as the raw material.After three years trial production,the product quality has reached advanced level in China,and is equivalent to the needle coke imported from Japan.Home-made needle coke has good market prospect.

This paper analyzes the quality and coking property of 1/2 medium caking coal.By conducting 40kg pilot plant test and industrial coking test,it shows that with the increase of fat coal up to 15%,the coke quality can meet the requirement of blast furnace,and the coking cost is significantly reduced.

With a case of 400t/d CMC capacity,two CMC technologies with heating source of steam and that of waste COG have been analyzed in this paper,in terms of feasibility study,dew point of waste gas at outlet,energy utilization efficiency and safe operation.The results show that the CMC technology with heating source of waste COG or the waste COG mixed with a certain amount of MPG (methanol purge gas) is proved feasible.

Due to the problems in the coal tower structure of 5.5m stamp-charging battery in design and construction,it gives rise to abnormalities,such as vertical cracks at brackets overhanging from the deep beam,vibration feeders resonation and imbalanced bracing systems of scaffold,etc..This paper analyzes the causes of the problems and gives solutions such as mending bracket’s crack,adding shear wall and improving the bracing systems of scaffold,etc.for treatment of the structural defects.

Considering the advantage and disadvantage of previous gas mixer,a new type gas mixer is developed.It has the advantage of uniform mixing,convenient and safe operation,and it will not be blocked easily,which has positive effect to reduce energy consumption and production cost.This mixing device has been used in many coke oven batteries,and all are in good running condition.

A process for foundry coke production with 550mm\|wide stamp-charge battery has been introduced in this paper.It is found that this type of coke oven battery can be able to produce high\|quality foundry coke by 40kg small oven testing and analysis of single oven production.

In view of the short service life of mullite-SiC brick used in CDQ connecting duct,β-SiC brick is developed with service life up to 6 years.Theoretically,with the β-SiC brick,energy can be saved by about 5.5%,in continuous 6-year operation for 1×140t/h CDQ system,energy consumption can be saved by about 15 300 tons in standard coal,by about 172 000 tons in water and by about 30.64 tons in coke breeze,and atmospheric pollutant can be reduced by 25.7 tons approximately.

Siemens PCS7 system in gas reversing machine for coke oven has been introduced in this paper,which realizes integration of data acquisition and control for central control room,with features of stable in operation,low cost in configuration and centralized monitor & control.This application plays an active role in showing an example for monitor & control of such similar individual equipment.

In view of the characteristics of coke oven heating process,such as large inertia,long\|time delay and time variation,CMAC (Cerebellar Model Articulation Controller)-PID integrated control mode is proposed in this paper,which has been used in coke oven heating and undergone simulation test.The test result proves that this solution has higher robustness and adjustable property for automation system and can improve static & dynamic performance of the system.

Further to the description for process principle of pusher machine,this paper analyzed hardware configuration of auto\|position system (APS) for pusher machine and introduced working principle of primary positioning and accurate positioning of the system,including a further research on the speed control for auto\|positioning and oven number identification calculation.This application shows that the APS can realize pusher machine positioning quickly and accurately,with tolerance within ±5mm.

The gascollecting main pressure is an important parameter for battery production.There were the problems of large fluctuation of pressure in the gas collecting main and yellow smoke leakage on the battery before.By the use of continuous change fuzzy control technology,the pressure in the gas collecting main can be maintained stable,and pressure fluctuation can be controlled within ±20Pa of the setting pressure.

This paper introduces the heterotrophic nitrifier strain Y1 separated from activated sludge，with optimized nitrifying conditions of C/N 9.6，temperature 30℃，initial pH value 9.0 and shaking speed 250rpm，under which the 152.88mg/L NH+4-N get degraded to 4.02mg/L in 8 hours，without accumulation of intermediate products，such as nitrite and nitrate. It is also found that the bacterial strain Y1 acts as heterotrophic nitrification，but also have the ability to use NO-3-N as sole nitrogen source in aerobic conditions for denitrification，with rate of 99.05% as degradation within 40 hours for initial concentration of 196mg/L NO-3-N.

Industrial naphthalene contains impurities of benzothienyl,phenols,quinolines and other unsaturated compound which has bad influences on the further application of naphthalene.The boiling points of naphthalene and main impurity benzothiophene are too close to separate each other directly by distillation.Using hydrogen peroxide as oxidant,formic acid as catalyst,oxidation method can be effectively used for the removing of benzothiophene from industrial naphthalene.Industrial naphthalene; Benzothiophene; Refined naphthalene; Hydrocarbonylation

This paper introduces the technology for deaminization and ammonia liquor production with phosphoric acid from COG.This new process has a higher deaminization efficiency to meet the COG quality requirement and cut cost for bought\|out sulfuric acid，which is characterized with lower corrosion，less maintenance cost and lower labor intensity compared with conventional saturator process for ammonia sulfate production.

Technology and equipment have been upgraded according to the problems found in operation of benzol scrubbing and benzol stripping.The innovated technology has achieved advantages,such as remarkable reduction of energy consumption for light benzene,significant decrease of benzol content in purified gas after the benzol scrubber,higher light benzene yield and considerable economic benefit.

The Coking Plant of Liuzhou Iron & Steel Co.Ltd.introduced vacuum benzol stripping process in order to solve the problems such as high steam consumption and large amount of stripped water generated,etc..As a result,the distillation temperature can be effectively lowered by reducing the operating pressure and energy can be saved and effluent can be reduced by utilizing hot lean oil instead of steam.The system under negative pressure is now running stable after commissioning and process improvement,showing more environmental benefits compared with the conventional benzol stripping process under normal pressure.

This paper described main sources of pollutants,i.e.waste gas,waste water and industrial residue, also known as “three wastes” in coal tar refinery,including main treatment measures,processes and new solutions in recent years in China in the hope of providing reference for the control against pollutants from tar refinery industry of China.

The causes decreasing crude phenol production and recovery have been found,such as big fluctuation of scrubbing operation,low separation efficiency of decomposer column and high phenol content in tail gas,etc.by analyzing crude phenol production and CO2 decomposition.Solutions are given for improvement,such as improving scrubbing operation,adjusting decomposer column process,improving tail gas precipitation and increasing spent lye extraction,etc.,so that the crude phenol production and recovery can be upgraded.

Quinoline insoluble (QI) is an important value for quality control of coal tar.The refined coal tar pitch for needle coke is required with QI<0.1%,however the allowable error in the existing GB/T 2293—2008 is less than 0.8%,obviously not suitable for needle coke.According to the solubility of compound and the diversity of testing solvent,aqueous solution can be used in replacement of acetone solution during the analysis of refined coal tar pitch,which makes the QI measurement more accurate.