The annual average coke production output of coking enterprises increased from 0. 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. Over 90 percent of the total coke production is dedicated to blast furnace operations. Chronic longterm exposure to coke oven emissions in humans results in conjunctivitis, severe dermatitis, and lesions of the respiratory system and digestive system. Therefore, how to save energy, promote production and quality of coke are key problems of coke oven control and management. Raw coke oven gas cog 1b other means of identification. To prepare coal blend suitable for carbonisation in coke ovens batteries to produce bf coke. Esposito, head of business unit coke, paul wurth italia s. Capacity annual safety 20 recipient of the max eward safety award from the american coke and coal chemicals institute accci about the company suncoke is the largest independent u. Jun 08, 2015 if you like this video do not forgot to click on like. Industry profile draft report prepared for daniel c. In the cdcp, hot coke from coke oven at a temperature of around 1050 0c is cooled down to cold coke of temperature less than 200 0c. Optimization of coke oven gas desulphurization and combined cycle power plant electricity generation lingyan deng, and thomas a. Coke oven steel making process explained im hindi part 5 duration.
This volatile matter leaves the coke oven chambers as hot, raw coke oven gas. Coke will normally be transferred directly to ak by conveyor, but a system to allow coke to be loaded into rail cars will be installed. Provisions will be made to store a run of oven coke, screened coke, and coke breeze in open coke piles under emergency situations. Coke is used in blast furnaces for the conversion of iron ore to iron, which can be further refined to produce steel. Combustion restrictions vary by plant location 1d name, address, and telephone number. Steel authority of india limited iisco steel plant sub. Coal bin is located aside between the two batteries. Coke oven furnaces coke oven european environment agency. In addition, surplus coke oven gas is being used as feed to jswsls dolvi steel plant replacing natural gas resulting in overall cost savings for jswsl. Hence, this process is called byproduct cokemaking.
The waste mill oil was added in the coal blend as a binder before hammer mill and charged in. Vertical coke ovens are arranged in two batteries side by side, e. The raw coke oven gas and the flushing liquor are separated using a drain pot the down comer in the suction main. During that time, the volatiles of the coal are driven into the offgas and a pure carbon form called coke remains. Co gas produced is used for heating purposes in the plant. 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.
Mod02 lec02 coal carbonization and coke oven plant nptelhrd. Sour coke oven gas cog 1c recommended use of the chemical and restrictions on use. Metallurgical coke is used in iron and steel industry processes primarily in blast furnaces to reduce iron ore to iron. Application of sketchup in coke oven threedimensional. Tkisaist2015paperusing modern coke oven technology at. A highquality coal does not generate high pressure on the coke oven, and they also shrink enough so that they are easily removed from the coke oven.
A battery consists of a group of ovens connected by common walls. The heat extracted from hot coke is utilized in waste heat boilers to generate high pressure steam. Tailor made complete coke oven plants from a single source thats our commitment and your advantage gained from a partnership with us. During this process, raw coke oven gas is removed through an offtake system, byproducts such as benzene, toluene, and xylene are recovered, and the cleaned. Section 1 identification section 2 hazards identification.
Oct 04, 2018 coke makers use a mix of coal to improve the quality of coke they create. This document is one from the series of foreseen documents listed below at the time of writing not all of the documents. To convert coal into coke by carbonising coal in absence of air and thereby distilling the volatile matter out of. The main function of coke ovens is to convert coal into coke which is used as a fuel and reducing agent in the blast furnace. Coinvestigator division of environmental health sciences. Comparison of byproduct and heatrecovery cokemaking technologies. The coke oven gas, net of these products, is then recycled to underfire the coke ovens, serve as a fuel source to other parts of the plant, or sold to outside utilities. Capacity annual safety more than 500,000 hours and counting without a recordable injury. 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. About the company suncoke is the largest independent u. Coke oven gas cog is highly rated as a valuable byproduct of coal carbonization to produce coke in the steel industry.
The coke ovens are nonrecovery type, which combusts the coke oven gas in the ovens as it is generated. Coke plant technologies pioneering coke plant technologies are part of our daily business. These facilities ensure continuous, highquality and costeffective supply of these key raw materials to dolvi steel plant. The coke oven managers yearbook 222 general when producing coke by coal carbonisation a large volume of gas is produced. The redhot coke is taken to coke dry cooling plant for cooling. Coke oven gas treatment tar, liquor, ammonia by keith wright. Coke gas treatment reduces underfire system corrosion and risks challenge the underfiring system of a belgian coke plant was suffering from fouling, deposits from tar, naphthalene, salts and under deposit corrosion. Considering the complexity and importance of flue temperature control in coke oven heating process, the control method of combining the. Coke oven gas cog is the primary byproduct from the byproduct cokemaking process.
Coke oven gas processing equipment zvu engineering. In the process of converting coal into coke using the byproduct coke oven, the volatile matter in the coal is vaporized and driven off. The flushing liquor and the raw coke oven gas then flow separately to the byproduct plant for treatment. Coke oven is key thermal equipment and consumes energy massively in the metallurgy industry. Adams ii department of chemical engineering, mcmaster university, 1280 main st. Sg28 safety guideline for coke ovens, coke dry cooling plant. The coke ovens are nonrecovery type, which fully combusts the coke oven gas in the ovens as it is generated. The effi ciency and environmental performance of our plants are renowned worldwide. The coke ovens plant has following main sections a coal handling plant. Foundry coke comprises most of the balance and is used by foundries in furnaces for melting metal and in the preparation of molds. Water is used for cooling ovens, quenching off gas. Saturated raw gas coming from the coke oven battery contains around 46 % to 48 % water vapour. Before carbonization, the selected coals from specific mines are blended, pulverized, and oiled for proper bulk density control. Hot coke produced in coke oven battery is fed in the cdcp chamber at the top.
The properties of coke are influenced by moisture content and density. Pdf the process of benzene distillation and process of coal tar distillation being typical for east european countries is analyzed in this paper. Coke and coke byproducts, including coke oven gas, are. The residual coke is pushed out of the oven by pusher car through a guide into coke bucket. Smooth and undisturbed operation of the coke oven plant. Waste characteristics the coke oven is a major source of fugitive air emissions. The majority of coke produced in the united states comes from wetcharge, byproduct coke oven batteries figure 1. Both batteries have usually two charging and pushing machines. Indiana harbor coke company ihcc metallurgical coke plant, consisting of four batteries of 67 coke ovens each to produce coke for ams blast furnaces. Nov 18, 2012 water consumption in coke oven coke ovens consume % of all water required in the steel plants. The conversion of coal to coke is performed in coke oven batteries.
Before coke oven gas can be used as fuel, it has to be treated. The actual chemical content of the emissions depends on the process variables. After cleaning, the main components include 0% h 2, 2 % co, 20% ch 4 and % co 2. Pdf total site integration for coke oven plant researchgate. An epidemiologic study of health effects and coke oven emissions from tonawanda coke. The results should be reported to the re sponsible authorities and relevant parties, as re quired. Application of sketchup in coke oven threedimensional digital modeling. Coke oven plant flow chart understanding sinter and sinter plant operations, with 32 files. Mar 20, 2020 coke oven and pellet plants adjacent to the steel complex. Volatile matter and co coke oven gas from coal and extract chemicals known as coal chemicals. The coke oven byproduct plant is an integral part of the byproduct cokemaking process. The equipment installed to the existing apparatuses of coking plant svoboda can be mentioned as an example of sealing system. Coke gas treatment reduce underfire system corrosion and risks. Condensed coke oven emissions are a brownish, thick liquid or semisolid with a naphthalenelike odor, while uncondensed coke oven emissions are vapors that escape when the ovens are changed and emptied.
Optimization of coke oven gas desulphurization and. Highcapacity coke oven batteries 29 april 2014 eurocoke summit 2014 edinburgh 2 highcapacity coke oven batteries definition highcapacity coke ovens coke oven batteries for production of 1. Exposure to coke oven emissions may occur for workers in the aluminum, steel, graphite, electrical, and construction industries. College of chemical engineering and technology, wuhan university of science and technology1. Coke oven, which is a large industrial furnace, is complex in structure. Typically, a single ton of coke generates approximately 360 m 3 cog. The corrosion resulted in gas leaks, which created safety risks, air pollution and highrisk repair work. A plant scale trial was conducted to recycle the mill oil waste through non recovery coke oven route. The main byproduct in the process of coke making is crude coke oven gas and this has a lot of valuable chemicals.
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