A new technology of refined anthracene preparation by emulsion crystallization method is studied in laboratory where the factors affecting the quality of refined anthracene，such as amount of emulsifier，ratio of water to solvent (w/w) and amounts of additives，etc. have been investigated.The result shows that the purity of pure anthracene can reach above 95% and meet national specification Gr.I after primary emulsification when a compound emulsifier (SDBS+Span20) is adopted and acetophenone is used as solvent.

Based on the analysis for the composition of coking crude benzol and coke oven light oil，the feasibility of hydro-refining by coking crude benzol mixed with coke oven light oil is put forwarded according to an appropriate proportion of feedstock.The operating parameters can be adjusted accordingly as per design requirement and industrial standard so that the final product can meet national specification and solution can be found due to the insufficient feedstock in the market at present.

This paper introduces the categories of combustion additives，summarizes the influence of oxidant and catalyst to coal combustion property and the influence of desulfurizer and denitration agent to the discharge of pollutants after combustion.The use of coal combustion additive can effectively improve coal combustion property，reduce the emission of SOx and NOx，playing an active role to energy saving and pollutant discharge.

This paper introduces the study and calculation process of the performance-cost ratio of the coking coal used in HanSteel. The performance-cost ratio of coal mines is also compared to select the superior mine. The result shows that with such comparison,coal blending cost can be reduced to certain extend on the premise that the coke quality is stable.

This paper describes a series of new innovations as energy-saving & environmental protection cases in coking plant of Ningbo Iron & Steel Co.,Ltd.,such as VVVF technology,energy-saving type coke oven lid,thermal insulation layer in oven door,CDQ process,utilization of COG condensate at final cooler,large indoor-type circular coal/coke yard,coal water distillation by tubular furnace,salt extraction from desulfurizing liquid and high-performance microbe for waste water treatment,etc.,which have been successfully used in the plant.

Comprehensive evaluation of individual coal is carried out taking coal ingredient index as main technical method，and combining regular indexes and coking indexes of 40kg pilot battery.Several kinds of new coal resources and the coal resources in use are evaluated and compared.Two new coal resources are selected for 7.63m pilot battery.The selecting range of coal resources is widened.

This paper analyzes the influence of blending coal grain size to the production of coke oven battery after the coking chamber is increased.The influence of quantity and quality of crushed coal to the production of battery shall be considered for the determination of its grain size.The grain size shall be controlled to ～70% under normal condition.When the moisture content of coal in monsoon is higher than 13%,grain size can be suitably increased to 70%～75%.

Based on the actual situation of the coking plant of ShaoSteel,coal moisture control (CMC) technology is recommended.It can be seen through data comparison that CMC technology is good for energy saving and environment protection,and can create 82 040 000 RMB economic benefit every year.For a battery of 1.2～1.5 million t/y,the repayment period of investment is 4 to 5 years,so it is worthy for implementation.

Wet quenching water pump is raised by calculating to solve the maintenance difficulty due to original low position.Whether the water pump is installed above ground or not is related to local atmosphere (ATM) and installation elevation depends on ATM,necessary NPSH as well as suction resistance of pipe.

The process of 190t/h double chut CDQ in Anyang Steel,and the application of some key equipment such as heat-pipe exchanger,double chute,multi-tube cyclone separation de-dustor were described.Practical production shows that the application of such equipment can increase the utilization of CDQ heat power,reduce the possibility of coke floating,improve CDQ de-dusting effect,and provide favorable conditions for the stable running of the whole CDQ system.

This paper describes main processes and structural features of the swirl plate demister which had been put into numerical simulation in the internal flow field by fluid finite element software.The test shows flowing status,and distribution of pressure field and velocity field of the coke oven gas inside the swirl plate demister.The results are also analyzed in this paper.

This paper makes a conclusion for dry desulfurization and wet desulfurization,introduces the principle and methods of desulfurization waste water treatment such as partial conversion,complete conversion,multistep crystallization and diaphragm separation,and analyzes the problems of each method.

This paper described the principle and operating procedure for determination of NH4SCN content in desulfurization liquid by Fe-thiocyanic acid root complexing colorimetry and the test for interfering ion of SO42-,S2O32- and S2-.This method is proved to be simple in operation,sensitive in reaction and high in accuracy,which could rapidly determine the NH4SCN content in desulfurization liquid.

This paper analyzes the factors affecting the quality of ammonium sulfate in the production.In view of the problems such as the appearance,free acid and black particles in the ammonium sulfate,we have to upgrade the product quality,minimize off-spec.rate and maintain high quality rate by improving technical process and management.

This paper describes different treatments for waste HPF desulfurizing liquid and analyzes operating cost and investment estimate for different HPF desulfurizing liquids and sulfur as well.The analysis shows that it costs very few but with big pollutants by blending the desulfurizing liquid with coking coal and that it costs a little bit more but not a sustainable investment in the long-run by extracting salt from the desulfurizing liquid and thirdly it costs high but can be recycled into the coking process by acid-making which is achievable to a win-win situation in terms of economic benefit and environmental benefit.

This paper analyzes factors of affecting desulfurization efficiency in vacuum potassium carbonate desulfurization process,offering references for production practices.Improvements are made according to actual situation so that the desulfurization efficiency,as a result,can be remarkably increased.

In this paper,problems in benzol scrubbing system under negative pressure are analyzed.Based on behaviors of crystals,process parameters are adjusted to solve improper temperature control,low efficiency of wash oil regeneration as well as blockage due to long time crystal deposit.Normal production can be resumed as a result.

A new refining process of crude benzol by catalysis and chlorination is introduced in this paper, including pretreatment,catalysis and chlorination,stripping by alkalify,distillation and waste treatment as well.This process appears features of short flow,low consumption and high quality product.

This paper introduces the principle,method and result of acid making offgas control with coal water.This process is simple and has high desulfurization efficiency.SO2 and SO3 content in acid making offgas can be reduced to less than 30mg/m3,at the same time nitric oxides are absorbed.Economic benefit and environmental benefit are remarkable.

Based on the problems arising from the operation of original sulfur melting kettle,the operation of NF900 internal separation type sulfur melting kettle is introduced,which shows a preferable effect.

This paper described the general situation of benzol hydro-refining equipment and some clogging at heat exchanger in hydrogen adding unit and analyzed the causes.The analysis shows that the clogging can be solved by controlling the quality of light benzol feedstock,adding inhibitor,establishing a perfect management system for residue removal and disposing the residual oil from pre-evaporator and evaporator,etc..