The samples were ground to pass 250 microns for both free swelling index and volatile matter tests and 425. Coal blend various types of coal of desired coking parameters is coked oxygen. Most advanced plant arrangements and operational techniques are adopted by paul wurth for the engineering design of cokemaking facilities and have been implemented on almost 20 references worldwide. Atmospheric pollution control in coke ovens norms for coke oven emissions cpcb entrusted the job of preparing norms of coke oven emissions to mecon who in consultation with different steel plants and international standards such as usa caaa1990i, germany taluft1986 etc. A blend of three to five coking coals is generally used in the production of foundry. After cleaning, the main components include 0% h 2, 2 % co, 20% ch 4 and % co 2.
Water is condensed out of coal, out of the coke oven gas while recovering tar and other products. The fds coke plants design incorporates an improved iteration of existing nonrecovery coke plant technology that includes a number of technological advances. Coke is produced by the destructive distillation of coal in coke ovens 320. Coke is the most important raw material fed into the blast. Coke oven wastewater treatment by two activated sludge systems. How to create coke in a coal pilot plant or testing oven. Typical flow diagram of a top charged coke oven plant showing emission sources. Exposure to coke oven emissions may occur for workers in the aluminum, steel, graphite, electrical, and construction industries. Higher capacity of the coke oven chamber is an important parameter for byproduct recovery type ovens. Tkisaist2015paperusing modern coke oven technology at. In order to improve energy efficiency and reduce net greenhouse gas emissions, a combined cycle power plant ccpp where cog is used as fuel is proposed. The treatment station is a model of an asp, without a sludge recycling and a sludge thickener instead of sedimentation basin. Environmental protection agency innovative strategies and economics group md15 office of air quality planning and standards oaqps air quality standards and strategies division research triangle park, nc 27711 prepared by research triangle institute. A battery for heating caking coal is of a shape in which many ovens.
Comparison of byproduct and heatrecovery cokemaking. The treatment efficiency is failing in phenol removal. Zvu engineering belongs among the leading suppliers in the filed of coke oven plant key equipments on the czech market covering coke oven tar separation, equipment for absorption of chemical components and equipment for cooling down of. Coke oven gas is an abundant byproduct of coverting coal into coke used in steel production. Environmental assessment of coke byproduct recovery plants. The initial effort was directed at limiting particulate emission discharges from coke oven charging and topside leaks at charging lids, offtakes and collecting mains. Water consumption in coke oven coke ovens consume % of all water required in the steel plants. Coke oven furnaces coke oven european environment agency. Highflexibility coke and coal processing lines fulfil the latest requirements in terms of raw material blending.
Today, with the increase in petroleum prices, the new posture for byproduct plants has not fully developed. The raw coke oven gas and the flushing liquor are separated using a drain pot the down comer in the suction main. Coke plant automation cokemaking our activities site. Pilot plant study makgato seshibe stanford a research report submitted to the faculty of engineering and the built environment, university of the witwatersrand, johannesburg, in partial. The redhot coke is taken to coke dry cooling plant for cooling. Valia, scientist, ispat inland inc introduction a world class blast furnace operation demands the highest quality of raw materials, operation, and operators. After leaving the coke oven chambers, the raw coke oven gas is cooled which results in a liquid condensate stream and a gas stream. Coke production for blast furnace ironmaking by hardarshan s. The coke oven byproduct plant is an integral part of the byproduct cokemaking process. We have manufactured and supplied more than,000 doors, world wide. Coke oven is a complex plant with the characteristics of large timedelay, strong nonlinear, multivariable coupling and changeable parameters. At design capacity, the facility will carbonize 910,000 tonsyear of coal and produce up to 614,000 tonsyear of furnace coke. Operated the coke oven plant of ms wellman coke india. Sinter plant coke oven batteries 7 basic oxygen furnaces 3 scrap metal electric arc furnaces 2 continuous casters 3 raw materials iron making steel making.
Consequently the simplified methodology is to combine an activity rate ar. Coke is a grey, hard, and porous fuel with a high carbon content and few impurities, made by heating coal or oil in the absence of aira destructive distillation process. From coking coal to coke perspectives for met coke production in european union aleksander sobolewski, bartosz mertas. Operation of cuttingedge coke oven having all of durability. Generally, the coke ovens found in the cumberland region were used to convert the bituminous coal mined in the local mountains into industrial coke, a relatively cleanburning fuel used in the smelting of iron ore. Coke oven, which is a large industrial furnace, is complex in structure.
Pdf coke oven wastewater treatment by two activated. Investigating the effect of substituting fractions of imported coals with coke oven tar on coke quality. Optimization of coke oven gas desulphurization and. Santanu chakraborty, in treatise on process metallurgy.
An introductory presentation on coke oven plant coke. Applicability of coke plant control technologies to coal. Application of sketchup in coke oven threedimensional digital modeling. Production of alizarin, japans first synthetic dye, begins omuta. Coke is used in blast furnace bf both as a reductant and as a source of thermal energy. Width of the coke oven towards coke side is slightly more than that on pusher side to facilitate easy discharging of coke, as it swells during coking. When the cycle is completed, the contents of the oven are expelled at temperature and quenched with water developing a grey mass of coke. From coking coal to coke perspectives for met coke. Pdf coke oven intelligent integrated control system. The flushing liquor and the raw coke oven gas then flow separately to the byproduct plant for treatment. Hyundai steel built a coke oven plant together with thyssenkrupp industrial solutions formerly. The main byproduct in the process of coke making is crude coke oven gas and this has a lot of valuable chemicals. Many of the experts in the coke making world, especially not so young, still remember the role played by the cokemaking international magazine, published by the verein deutscher kokereifachleute vdkf until the year 2002 when it stopped its publication because financial problems.
Investigating the effect of substituting fractions of. Tailor made complete coke oven plants from a single source thats our commitment. Coke oven emission standards a comparative assessment. It has been found that phenol containing coke oven plant can be effectively. The functions of the byproduct plant are to take these two streams from the coke ovens, to process them to recover byproduct coal chemicals and to condition the gas so that it can be used as a fuel gas. Coke oven gas processing equipment zvu engineering. We have manufactured conventional doors, ikio doors and the latest blue sky doors. Introduction of high quality coke to a blast furnace will. Short and simple answer to this question would be a recovery coke oven recovers the other byproducts products other than coke that are formed during the formation of coke from coal, while a nonrecovery coke oven do not recover such byproduc. Studies on the gieseler plastometry parameters of the. Water is used for cooling ovens, quenching off gas.
They will be arranged in three batteries one with 20 ovens and two with 40 ovens each. Coal is converted into coke by heating the prepared coal blend charge in the coke ovens in the absence of air at a temperature of o c1050 o c for a period of 1619 hours. The most common steel making technology is the bfbof route. It is an important industrial product, used mainly in iron ore smelting, but also as a fuel in stoves and forges when air pollution is a concern the unqualified term coke usually refers to the product derived. This volatile matter leaves the coke oven chambers as hot, raw coke oven gas. Means of improving cost calculations at oao zaporozhkoks are considered, for the example of coke. Combined heat and power plant coke oven gas in chemical manufacturing. The various stages of the steel plant is described below. Turnkey projects non recovery coke oven service provider. First high capacity coke oven battery design of 7m height in india.
The coke oven byproduct plant coopers creek chemical. The free swelling index, volatile matter and gieseler plastometeric parameters were determined. Coke dry cooling plant coke dry quenching solutions. It is important to develop new methods of determining the costs of individual products within a complex process, so as to determine, with maximum precision, the direct costs of each stage of the production process and better distribute the indirect costs.
Chronic longterm exposure to coke oven emissions in humans results in conjunctivitis, severe dermatitis, and lesions of the respiratory system and digestive system. The offgases from the mhf and the eaf are merged and dedusted by a bag filter. Application of sketchup in coke oven threedimensional. Mitsui mining actively expands chemical operations into other areas, including synthetic ammonia and ammonium sulfate. Coke oven gas cog is a byproduct of the coking process, in which coal is heated in the absence of air to drive off the volatile compounds. An introductory presentation on coke oven plant free download as powerpoint presentation. The raw coke oven gas evacuated from the gas collecting main of the new batteries will be exhausted from the pusher side of the ovens via the down comer to the condensation plant by one separate gas pipeline for each phase. Up to 96 ovens, 400,000ta for single row sidecharging and stamping cokeoven.
Main aim of the application of the oxidation treatment process on coke oven wastewater was the reduction of pahs under law limits. The equipment installed to the existing apparatuses of coking plant svoboda can be mentioned as an example of sealing system. Water is used as cooling media to cool the hot coke which not only consumes large volume of water but also releases harmful pollutants which is also not permitted buy the government latest regulations. The shift has been toward using the byproduct plant to clean coke oven gas for fuel, recovering those materials that can be used, and economically disposing of the rest.
Industry profile draft report prepared for daniel c. The residual coke is pushed out of the oven by pusher car through a guide into coke bucket. To prepare coal blend suitable for carbonization various steps involved are. Coke oven emission standards a comparative assessment evolution of caaa of usa ill work on development of standards for coke oven emissions was officially begun in march 1975. College of chemical engineering and technology, wuhan university of science and technology1.
Coke plant scc 30300331 combustion gas foul gas to byproduct plant from byproduct plant combustion. Table 1 suggests, the wi coal has a high content of o joining ali phatic side. The coal cakes are coked in the coking chamber for a coking cycles high temperature carbonization. An automation system for smooth coke plant operation. Coke oven gas cog is the primary byproduct from the byproduct cokemaking process. Traditionally dry quenching process is being adopted for the cooling of coke produced from the coke oven battery in steel plants. Material balance of a typical byproduct coke oven plant to assess the quality and quantities of products, byproducts and wastes generated from an average coke oven plant, a 5,000 tpd coal input plants was selected as a typical model. Our coke oven air cooled doors conform to latest environment control standards with almost no emissions. The material balance basis of the above plant is summarized in table 46. Coke ovens friends of the cumberland trailfriends of the. Holding 227 kg of raw coking coal, this pilot plant mirrors realworld coke production over a basic 18 hour processing time. With a relatively high heating value of 18 mjnm3, cog can be used in all heating applications on a steel plant, including heating of the coke oven battery itself. Saturated raw gas coming from the coke oven battery contains around 46 % to 48 % water vapour. In the process of converting coal into coke using the byproduct coke oven, the volatile matter in the coal is vaporized and driven off.
This was also a chinese designed jumbo type coke oven battery having having production capacity of. The volatile matter of coal liberated during carbonization is collected in gas collecting mains in the form of raw coke oven gas passing through stand pipes and direct contact cooling with ammonia liquor spray. The cokemaking process involves carbonization of coal to high temperatures 1100c in. In a process known as coking, coal was shoveled into beehiveshaped coke ovens insulated with a layer of dirt and then ignited. Coke oven in kolkata, west bengal get latest price from. It involves reduction of ore to liquid metal in the blast furnace and and refining in convertor to form steel. The coke pusher car takes raw coal from the coal tower, stamps and presses them to coal cakes, then pushes the coal cakes into the coking chamber. Improved cost calculations of cokeoven gas at coke plants. Many steel refineries generate significant quantities of coke oven gas cog, which is in some cases used only to generate low pressure steam and small amounts of electric power. Thanks to supracok, the level2 automation system for coke oven plants developed by paul wurth, coke oven operators can rely on stateoftheart automation technology to achieve best operational performances while satisfying the ever more stringent environmental standards. What is the difference between recovery and nonrecovery. But the impurities it contains make it unsuitable for use as fuel or feedstock.
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