DOE Cooperative Number DEFC2292PC9252 1151 A2P Illinois University - PDF document

1 DOE Cooperative Number: DE-FC22-92PC9252
DOE Cooperative Number: DE-FC22-92PC9252 115.1 A-2P Illinois University at Carbondale Frank Honea, new use Illinois coal use as injected into production. Because decreasing availability metallurgical is now being replaced the tuyere purpose of this study this process. Illinois coal coals of contents are for the already underway test the Herrin No. injection feed new and limited experience with coal injection systems a lack not been however. Coal injection research has Japan. Blast furnace coal injection has been world and Coal injection re

2 sults increased blast also been feed coa
sults increased blast also been feed coal low was desirable. major problems at complete combustion understanding about must be rates are it is directly determine of Inland Steel (put coal injection the three facilities available. The third at the been installed last twelve demonstrates the industry gives this process. mid-west adjacent Basin Coalfield. blast fbrnace become available Because it is it is for production and, state of the for the Illinois coal industry that some Illinois coal such as high sulfur chlorine content low rank bitum

3 inous coal has limited use as coking coa
inous coal has limited use as coking coal steel industry. literature suggests low rank coal injection. this is Illinois coal, content is as a major problem injectants (oil coal) suggests that increased tendency enter the of the iron of the also supports this idea. as a be a This is chlorine is to to for the is intended underway with test the and Springfield use as furnace injection feed coals. new and unique pilot plant The specific objectives of this project are: test the blast furnace injection performance of pilot plant fiom the test fac

4 ility samples at intermediate stages for
ility samples at intermediate stages for chemical analysis, optical microscopic analysis, char analysis (ash chars generated under blowpipe-tuyere simulated raceway through the model of evaluate the data pilot plant compare it studies at both Armco and Inland demonstrate the computer models. During this quarter a sample of Ottawa, Canada. coal was at three the reacted were collected at fiom the injection point. calculated coal burnout recently been delivered being analyzed. The results completed during this quarter. recently been now being

5 of these results for the with very ash
of these results for the with very ash values, have replacement it) at hot metal (RAFT) varies injected coal. now being and compared other types study is the 1993-94 period. is intended underway with Inland Steel Companies for use furnace injection feed is the Illinois coals unique pilot plant objectives of To test the facility samples injected coal, combustion char, chemical analysis, microscopic analysis, char coal burnout analysis (ash TGA reactivity of chars generated under blowpipe-tuyere conditions at simulated raceway conditions (t

6 emperature evaluate the through the mode
emperature evaluate the through the model of pilot plant it with and Inland demonstrate the Illinois coal computer models. new use Illinois coal molten iron steel production. Because availability metallurgical now being coal injected at Illinois coal, during fiunace injection Illinois coal Illinois coal that the date suggests contents are for the already underway with the Companies and test the feed coals. which basically receives iron molten iron with carbon which can The blast with brick, into the top, very hot air is few hours. Once con

7 tinuously, usually for a of ten produces
tinuously, usually for a of ten produces about of molten iron per capable of very high and chemically carbon product made in large ovens the iron oxides provides additional slag, which forty-five thousand feet per large stoves as a into the part of iron, which the bottom of The process furnace generates great hot, dirty at the cooling equipment. The then suitable be burned the stoves for other steel plant. four stoves hot blast The stoves tall steel The checker bricks the by-product hot gas passes through bricks until they Then combustion c

8 old blast hot blast furnace. The stoves
old blast hot blast furnace. The stoves are one "on the others are is always hot blast blast &mace. furnace (after been injected over forty decrease coke the temperature tuyere, coal has injected fuels therefore, the for use. typically required for the pounds of oil, and reduce coke use basis coal has coal injection, hot blast the tuyere ideal case, combusted before raceway of furnace (see the products is not always uncombusted coal Cross-section of coal injection. coal for is influenced Carbon, hydrogen, ash (amount, chars with coal with

9 out Good combustibility efficient utiliz
out Good combustibility efficient utilization have different combustion cooling effects, the selection characteristics is efficient blast longer considered characterize coal injection. Other factors char microstructure, must also be considered. for efficiently injecting pulverized coal into combination of blast furnace operations experience Wilcox experience handling of pulverized 1965. The installed on improved designs Operations experience system has surpassed quarter of injection system. system designed availability of phase of coal inj

10 ection was the on the However, at beginn
ection was the on the However, at beginning of 1993 coal injection system went online been installed of the The Inland system design of Paul Wurth discharge hoppers, pulverization, furnaces. The be capable pounds per of hot metal Blast Furnace, at the smaller blast summer and quickly followed the other Inland Steel eventually consume 750,000 tons/year via blast Energy Technology (CANMET) Energy Research offer unique include a confidential evaluation service suitability of which can blast fiirnace pilot plant coal combustion facility simulat

11 es including blast (900" C), flow compos
es including blast (900" C), flow composition, coal injection residence time rate, air temperature, temperature temperature, preheater characteristics of coal used and physical they can through the model is based on principles of the steady state continuous enthalpy balance limited experience coal injection systems has and published literature on the not been of North however. Coal injection research has United Kingdom The most that the injection systems as a for the rest of the North American steel industry introduce the five years. and W

12 illmers British Steel generally conclude
illmers British Steel generally concluded reduced coke particles. Other work (Koen deLassat dePressigny coal injection combustion is major limiting coal injected. A report of their coal content of hot metal Takeda et that a coal seems advantages over other Investigations into furnace injection of coal have also been coal injection has successfbl around its use is expanding rapidly. operating costs; reported that there are major problems at of the injected coal rates are study is that it first North directly determine Furnace of on line coa

13 l injection are, therefore, the three Th
l injection are, therefore, the three The third system is Steel. The that the coal injection at both have been installed demonstrates the importance that steel industry gives are located Basin Coalfield. currently testing become available coals. Because it is Illinois coal industry of the coal is that some Illinois coal such as chlorine content blast furnace injection. Specifically: low rank as a coking coal steel industry. literature suggests low rank biggest problem marketing Illinois coal, fuel injectants coal) suggests has an increased

14 tendency of the the top above also this
tendency of the the top above also this idea. Illinois coals as a should not coal injection. because chlorine If it proven that expected Illinois coal coal injection, potential market becomes fbrnace at quarter of system recently at the use about five times start-up of Steel should use three as the is currently RESEARCH APPROACH underway with Inc. steel similar lines with active blast injected coal, hot metal, use this dedicated injector and sampling characterize the materials with their basic petrographic properties. lower part of the par

15 tition ratio of coal selection dedicated
tition ratio of coal selection dedicated injector inject Illinois directly determine original project was of longer range strict one projects fimded ICCI, not met in Second Phase (1993-94) overall blast fbmace injection Armco and study with 1994, coals Basin should successfully injected collaboration with center, the then processes coke content. coal at the rates than the Armco system. The nature flow is flow system. be using different Phase) (1994-95) study involves barrel quantities IBCSP 112 Pilot Plant synthesis of the data into the Pl

16 ant Testing pilot plant coal combustion
ant Testing pilot plant coal combustion facility simulates blowpipe-tuyere conditions including blast geometry, gas composition, coal injection residence time air temperature, temperature, preheater evaluate coal burnout analysis (TGA), microstructure of chars identified based on microscopic TGA method raceway conditions generated under Model Evaluation characteristics of furnace injection and physical they can predicted through of the injection process. principles of mass and includes mass balance enthalpy balance computer model determine

17 s: characteristics of change related prm
s: characteristics of change related prmissible amount injected coal natural gas replacement ratios specific coals the ratio of mass of injected coal replace it); coals: coke top gas the results of the testing be evaluated Armco and quarter a was successhlly Ottawa, Canada. The was injected reacted coavchar collected at injection point. The calculated coal burnout rates are These char recently been delivered now being analyzed. report on furnace injection CANMET computer completed during recently been received preliminary review for the coa

18 ls (104 with very ash values, have repla
ls (104 with very ash values, have replacement of coke it) at rates of hot metal being analyzed and will be summarized and DISCLAIMER STATEMENT Illinois University Agreement Number DE-FC22-92PC92521 Institute. Neither Crelliig or Carbondale nor of its subcontractors Energy, Illinois Department Natural Resources, Development Board, representation, express with respect that the use rights; or damages resulting or process product, process, expressed herein not necessarily or reflect those of Notice to and Publishers: information from any part

19 of statement about 1990, Blast raceway
of statement about 1990, Blast raceway investigation Processing Technology, Elsevier Science Publishers 1987, Coal '87, Australasian Institute of Parkville, Victoria, Australia, coal injection: p. 67-73. de Lassat 1990, Study injection: Ironmaking Conference Coal injection practice Usinor Dunkirk Ironmaking Proceedings The economics injection: Ironmaking Conference Proceedings Coal injection into the furnace: The combustion during furnace: Progress Combustion Science, of coal Ironmaking Proceedings Ponghis, N., coal injection Ironmaking C

20 onference Y., Akimoto, coal injection Ir
onference Y., Akimoto, coal injection Ironmaking Proceedings Ironmaking Conference Proceedings Ironmaking Conference furnace: Ironmaking Ironmaking Conference 28, 1995 PLANT TESTING FURNACE INJECTION Agreement Number: C. Crelling, ICCI Project ESTIMATED EXPENDITURES BY QUARTER 4,412 48,557 3 COSTS BY QUARTER Pilot Plant Testing of Illinois Coal for Blast Furnace Injection 100 80 20 0 sept 1 Nov 30 Feb 28 May 31 Aug 31 Months and Quarters - - - - - - Actual Expenditures Clean Coal A B C D F 4 SCHEDULE OF PROJECT MLESTONES I X X X X X C