problem and answer in iron and steel making process

8/10/2019 Problem and Answer in Iron and Steel Making Process

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What the main function of pelletizing ?a. to make pig ironb. form particles of a certain size and have properties that can meet

the needs of a metallurgical naturec. to rene iron ore

d. that is easy to transport iron ore spot

what is the function of limestone in a blast furnace?a. as the main ingredientb. as a binder material impurities in iron ore and slag makesc. binding impurities in the iron ored. as slag forming

how the chemical composition of siderite ore?a. 36,8 !" , 3#,$% &i and 3#,63 'b. 6(,8$ !" , (%,)# ' and #),#* +('c. 48,20% Fe , 3,!!% "#2 , and $3,8$% #

d. 6,* !e and 3),)6 '

-ron ore pellets are said to hae good strength when,?a. pellets are not easily degraded during the storage processb. pellets are not easily degraded during the transfer processc. pellets are not easily degraded during the reduction processd. anser a , b , and c true

how temperature occurs during the direct reduction process in the blast

furnace?a. 3)) / 8)) o0

b. 6))/##)) o0c. $$00&$800 o"d. #8)) / ())) o0

what is the function of coke in blast furnace?a. to make slagb. to provide structurec. to add the temperatured. to increase the purities in steel

what type of coal which used in blast furnace?a. bituminous

b. peatc. lignited. antrasit

what is the harmful impurities in iron making process?a. !eb. 'c. 1od. 2i

What are the composition of ore burdent?

a. -ron ore, coal and cokeb. (ron ore, sinter, pelletc. 0oal, coke and limestoned. -ron ore, coal and limestone

What are two uses of slag?a. 1aking steel, water treatment


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b. 1aking cement, road buildingc. road building, making steeld. making cement, ater treatment

What is the similarity between iron ore types?a. colour

b. densityc. chemical formulad. high grade iron content)e. in mineral form*

Which one of the iron ore types below has maimum !e content oer 6$ wt ?a. 4yrite, 1agnetiteb. 1agnetite, 5imonite, 1artite)c. +artite, +agnetite*d. iderite, 7othite, 1artitee. 7othite, 1artite

Why we choose steel?ecept...)a. (ndonesia eports iron ore more than 20 million tonnes*b. easy of alloyingc. easy to heat treatmentd. easy of recyclinge. big amount in nature

&hese are the most essensial reuirements on characteristics of iron ore,

ecept...a. high iron content)b. high hardness*c. high content of basic oides in gangued. high reducibilitye. minimum of harmful impurities

Why teel -ndustry is ery essensial for national economic?ecept...a. because $ industrial metal euipment is !e based)b. 'teel consumption in (ndonesia is as high as other big countr-*c. &rend of teel consumption in -ndonesia is go upd. -ndonesia hae su9cient resourcese. -ndonesia is one of the country that eports iron ore

Which chemical reaction that do not occur inside the blast furnace?a. (0' : 0 ; 0'(b. !e' ; 0' : !e ; 0'(c. (!e3'*; 0'(: 3!e('3; 0'd. i'(; (0 : i ; (0'nser/c. (!e3'*; 0'(: 3!e('3; 0', the proper reaction is 3!e('3; 0' : (!e3'*;

0'(

a. c.

b. d.

nser/


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b. , because all !e reduction reaction in the blast furnace produces 0'(

and use 0' as reactant, thus if reaction is more e9cient, output 0'(

concentration increases compared to 0' output, as noted on lecture

presentation.

what carbon form is commonly used as blast furnace fuel?a. coke c. anthraciteb. bituminous d. lignitenser/a. coke, the product of bituminous coal burning or heating@ that contains higher

content of carbon and lower impurities, yet cheaper than anthracite highest

grade of coal@

What is the function of bentonite in iron ore pellet?a.


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Heat transfer rate to the stoc$charge in the furnace does not de!end u!on the .....

a. #%issivit" of the refractor" walls

b. 'i(e of the furnace

c. Use of waste heat recovery eui!ments

d. )hicness of the stocAnswer : C

Co%bustion of fuel in a furnace with ox"gen enriched air results in higher .....

a. Flue gas volu%e

b. Flame tem!erature

c. Fuel consu%!tion

d. 'tac loss

Answer : B

)he state%ent that shows the function of bentonite in iron ore !elleting !rocess is* +c,

a. As an i%!urities binder so the !rocess will !roduces high -ualit" !elletb. As an carbon su!lier so the !roduct will has so%e !ro!erties as well as we want

c. "s an material binder so the mixture will form into small marble#li$e

hich one that is not the -ualification of an ideal iron ore/ +a,

a. %oisutre content is high so the high uality of iron ore will be gotten

b. High content of basic oxide so it will not %ae an de%age to the refractor" bric

c. &eviation level is low so the iron ore has a good ho%ogenit"

One of i%!urit" ele%ent and it can0t enter the hot %etal is* +a,

a. %agnesium

b. )itaniu%c. Arsenic

1ron ore !ellet which is %ade in acid condition has an advantage in* +a,

a. &igh com!ression resistant

b. 3eduction abilit"

c. 1ts 'welling !ro!erties

)he state%ents below are function of coe in blast furnance exce!t* +c,

a. As a reduction gas because it can reacts with ox"gen

b. As a carbon su!lier and heat storage

c. "s a filter from the im!urities that come in to the blast furnance

hich -ualit" that coes should NO) have in blast furnace/

a. Have a high resistance against volu%e breaage

b. Have a low resistance against abrasion

c. Have a high resistance against che%ical attac

d. Have sufficient carburi(ation !ro!erties

hat is the !art of blast furnace that have a function to blow the hot air to the furnace/

a. )a! hole

b. Hearth

c. )u"ere

d. Crane

Peleti(ing -ualit" is defined b" the following answers below #4C#P):

a. 3eduction5&isintegration


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b. )he 'welling Pro!erties

c. Cold 'trength

d. Hardness of %aterials

hich one is iron ore that classified as 6ediu% 7rade/

a. 89; Feb. 892 < 9; Fe

c. 8= 5 92; Fe

d. 5=; Fe

'inter -ualit" is defined b" the following answers below #4C#P):

a. 'i(e distribution

b. Cold 'trength

c. 3eduction5&isintegration

d. &uctilit"

How tall a!!roxi%atel" is a blast furnace/

" ' m

B = %

C =>>> %

& =>> %

7ie two adantages of putting sinter into the furnace.

A 1t is chea!. 1t is eas" to %ae.

B 1t is eas" to %ae. 1t has a large surface area.

C 1t is chea!. 1t does not colla!se.

*t has a large surface area. *t does not colla!se.

What is the reducing agent in the blast furnace?

A Carbon dioxideB 'inter

C Carbon monoxide

& ?i%estone

What are the three raw materials used in making iron?

A 1ron ore coal and coe

B 1ron ore coal and slag

C Coal coe and li%estone

*ron ore+ coal and limestone

!or how long is the coal heated to turn it into coke?


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" ,- hours

B @> hours

C @> hours

& hours

&he one which isnAt a type of iron ore is ... C@a. hroat, 'tack, 1ell-, 1osh, earthb. &hroat, tack,


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C@ 2 BFe O


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What is the name of the zone ( in the blast furnace?a. Dead manb. Gacewayc. ctive coke zoned. 0oke slits

What is the name of the zone in the blast furnace?a. 1ell-b. tackc. +earthd.

@. Fe'2 is called

a. He%atiteb. ?e%onite

c. Peroxcide

d. irrite

2. hat is the te%!erature for basic sintering/


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a. ,

b. >>

c. 2>>

d. 2@>>

. hich is not the characteristic of a good iron ore/

a. High Fe contentb. Ho%ogen co%!osition

c. *rreducible

d. ?ow slag

=. hat is the function of coal/

a. 3educe carbon content

b. 0educing *ron ore

c. As the flux

d. ?i%iting reaction

. An iron ore with Fe content >; classified as

a. High grade

b. 6ediu% gradec. 1ow grade

d. Dnnown grade

@. hat is the results of steel%aing !rocess b" #lectric Arc Furnace/

a. Pellet

b. 1ron ore

c. '!onge 1ron

d. ?u%! Ore

2. Below is the raw %aterials for steel%aing exce!t . . .a. He%atite

b. ?i%onite

c. 6agnetite

d. 'ulfite

. Hot blast is blown into the blast furnace via . . .

a. )u"eres

b. )a! hole

c. Hearth (one

d. Coe (one

=. hat is fuel !ulvuri(ed on tu"eres/

a. Coal

b. Coe

c. ?i%estone

d. Ore

. hat is the correct co%!osition of burden ore exce!t . . .

a. Pellet

b. 'inter

c. ?u%! Ore

d. Coal


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@. )he %ost i%!ortant %inerals in these iron ore de!osits are shown in this below which one

have the right answer :

a. 6agnetite +Fe2O,

b. He%atite +FeO=,

c. P"rite +FeO+OH,,d. 1imonite (FeO(O&).n(&2O))

e. 'iderite +FeCO,

Fill the blan with the best answer :

a. @, Burden la"ersE 2, Coe slitE , 3acewa"E =, &ead 6an

b. @, Burden la"ersE 2, Active coe (oneE , 3acewa"E =, &ead 6an

c. ,) Burden layers3 2) Cohesive 4one3 5) 0aceway3 ') &earth

d. @, Burden la"ersE 2, Cohesive (oneE , &ead 6anE =, Hearth

e. @, Burden la"ersE 2, Active coe (oneE , &ead 6anE =, Hearth

2. hat is direct reduction reaction/a. Heat is transferred fro% the gas to the burden

b. 0esidual oxygen in the burden is removed and additional CO is generated

c. COHgas is generated fro% CO gasd. H"drogen can re%ove ox"gen fro% the burden to for% water +HHO,e. )he burden and coe are graduall" heated u!

. )his below are the functions of coe exce!t :

a. )o !rovide the structure through which gas can ascend and be distributed through the

burden.

b. )o generate heat to %elt the burden

c. )o generate reducing gases

d. 6o reduce the si4e of ore

e. )o act as a filter for soot and dust

*@

3@

(@

#@


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=. 1n this (one the coe and ore re%ain as discrete !articles within their se!arate la"ers and

coe degradation +%ostl" abrasion, occurs due to %echanical load and %ild gasification.

here is the (one/

a. Charging (one

b. 7ranular 4onec. Cohessive (one

d. Active Coe or &ri!!ing (one

e. 3acewa"

@. A basic slag is needed in steel%aing to

A, re%ove 2'iO as silicates.

B, reduce an" nitrogen5containing co%!ounds to 2N .

C, react with an" BrFnsted ?owr" acids !resent.

&, !rovide CaO to re%ove !hos!horus oxides as B = 2Ca +PO , .

#, oxidi(e an" carbon5containing co%!ounds to 2CO .

2. A slag is for%ed when a basic %etal oxide reacts with %olten GGGGGGGGGG at high

te%!eratures.

A, 2 BFe O

B, CaO

C, BCa'iO

&, 'iO2#, CO

. hen carbon %onoxide is used to reduce an ore as in a blast furnace it is converted to

GGGGGGGGGG.

A, gra!hite

B, carbon dioxide

C, %ethane

&, carbonate

#, %ethanol

=. hen h"drogen gas is used to reduce an ore +as in a blast furnace, it is converted to

GGGGGGGGGG.A, a%%onia

B, heliu%

C, h"drogen !eroxide

&, water

#, h"droxide

. 6etallurgical !rocesses that utili(e high te%!eratures are collectivel" called GGGGGGGGGG.

A, h"dro%etallurg"

B, !"ro%etallurg"

C, electro%etallurg"

&, allo"ing

#, roasting


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@. &ue to different wear %echanis% the length of electrode will be reduced during the !rocess

in #AF. hat is the best wa" we should tae to ee! the arc fro% electrode stable/

a. "d8usting the height of the elctrode continously

b. Adding so%e %ore height of electrode b" welded oint with the old one

c. )aing the new electrode to get better !erfor%ance

d. )aing lower conductivit" electrode

Cnswer > C

2. 'o%e %etallic oxides are acids !roducts which can react with the basic refractories of the

furnaces this acid will cause corrosions %echanis% in that refractories bellow is the best

wa" the !revent this corrossion !rocess b" acid !roducts exce!t:

a. Adding so%e li%e and dolo%itic li%e due to %olten !rocess

b. Blowing h"drogen into scra! %etal

c. "dding amount of 9iO2 and "12O5d. Blowing carbon oxide into %olten %etal

Cnswer > 0

. hat useful !ro!erties does slag have in electric furnace steel%aing/

a. 1t conduct the bath increase the te%!erature losses

b. *t insulate the baths+ rduce tem!erature losses

c. it hel!s !hos!hori(ation

d. it hel!s to creates so%e inclusions

Cnswer > C

@. )he !rocess of heating an ore to deco%!ose it and release an" volatile !roducts is referred

to as GGGGGGGGGG.

A, roastingB, s%elting

C, refining

) calcination

#, allo"ing

Answer: &

2. )he !ur!ose of a converter in steel !roduction is GGGGGGGGGG.

A, to reduce the iron in the ore to ele%ental

B) to remove im!urity elements by oxidation

C, to allow the for%ation of !hos!hides within the %etal for added corrosion resistance

&, to allow the addition of nitrogen for increased strength#, to allow slow solidification of the %olten %etal so it will !urif" as it cr"stalli(es

Answer: B

. hich reaction controls the te%!erature of a blast furnace/

A, 2 22C O 2CO+

B) 2 2C H O CO H+ +

C, 2 BCaO 'iO Ca'iO+

&, B = 2Fe O =CO BFe =CO+ +

#, B 2CaCO CaO CO +Answer: B

=. )he !ur!ose of burning coe in a blast furnace is

A, to !roduce reducing gases.

B, to !roduce heat.

C, to !roduce carbon %onoxide gas.

&, to !roduce h"drogen gas.

:) all of the above

Answer: #

. 1n the reduction of iron in a blast furnace li%estone is a source of GGGGGGGGGG which

reacts with silicates and other co%!onents of the ore to for% GGGGGGGGGG.

A, coeE carbon %onoxide

B, he%atiteE !ig iron

C) calcium oxide3 slag

&, %agnetiteE steel

#, calciu%E %olten iron

Answer: C

,. Blast Furnace consists of these !arts exce!t;a. Bosh

b. Hearth

c. :lectrode

d. )hroat

e. 'tac


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Cnswer> 0@

2. hat is the %ain !roduct of &irect 3eduction Plan/

a. 6olten 1ron

b. '!onge 1ron

c. &3 'teeld. 0 *ron

e. Coe Bree(e

Cnswer> D@

5. hat is the che%ical for%ula of ustite/

a. Fe2O

b. FeO

c. FeO=

d. FeC

e. Fe

Cnswer>


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d. 6o maintain basicity more than 5 and absorbs im!urities during the !rocess

. 1ron ores are rocs and %inerals fro% which %etallic iron can be econo%icall" extracted.

He%atite is one for% of iron ore which has 9J.J; Fe.

hat is the che%ical for%ula of He%atite/

a. FeO=b. Fe2O5

c. FeO+OH,.n+H2O,

d. FeCO

=. hich is the correct grou! of har%ful i%!urities fro% iron ore in steel%aing !rocess/

a. hos!hor+ Co!!er+ 1ead+ and >anadium

b. Nicel Cobalt Nitrogen and Ox"gen

c. Phos!hor Co!!er ?ead and Ox"gen

d. Nicel Cobalt Carbon and Ox"gen

.

ellets 6y!e Fe ? 9iO2 ? CaO ? %gO?

Acid 9 @. < 2. L >. L >.2Basic @=

Ollivine 9= < 9 2. < . L >. @. < @.

&he table below, show arious type of iron ore pellets produced in the

pelletizing process. Which one has the highest compression between these 3

types of pellets?

a. "cid

b. Basic

c. Ollivined. All t"!es of the !ellets have the sa%e co%!ression nu%ber

@. Banded ore dense %assive ore breccia ore "dne"5sha!ed !owder" earth" ores is

classified iron ore b"/


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a. 6inerals b. 'tructure

c. 7rades d. Har%ful i%!urities

2. hat is the difference between sintering and !elleti(ing ore/

Feed si(e %aterial of !elleti(ing is

s%aller than sintering

Feed si(e %aterial of sintering is

s%aller than !elleti(ing

Fe contain of !elleti(ing is lower

than sintering

d. Fe contain of sintering is lower than

!elleti(ing

. hat is the ste!s for !elleti(ing of burden %aterial/

a. Pre!aration of consentrate for%ation of green !ellets finishing

b. Pre!aration of raw %aterial Firing of green !ellets For%ation of green !ellets

c. Pre!aration of consentrate For%ation of green !ellets Firing of green !elletsd. Pre!aration of raw %aterial For%ation of green !ellets Firing of green !ellets

=. How %an" !ercent nitrogen in coe anal"sis for coe %aing is/

a. 5 ; b. @25@;

c. @5@J ; d. = 5 ;

. 1n the coe degradation of blast furnace !rocess how long the residence ti%e in the

cohesive (one is/

a. =>5> %inutes b. >5> %inutes

c. >59> %inutes d. 2>59> %inutes

@. )here are two %ethods of %aing steel are do%inant in %odern steel industries all over the

world. hich one is the steel%aing !rocess that reduces the carbon content to a level that

%atches the custo%er0s re-uire%ents/

a. #lectrical Arc Furnace

b. Basic Oxygen Furnacec. Mu!ola

d. &a!ur Monverter

2. )he !icture shows the !arts of Basic Ox"gen Furnace


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hat is the !arts of BOF that function is sealed !revent hot air and furnas esca!ing/

a. ater cooled lance

b. 3efractor" lining

c. )a! hole

d. %oveable seal

. +Fe2O, the che%ical ele%ent of/

a. &ematite

b. ?i%onite

c. P"rite

d. 6agnetite

=. )he #lectric Arc Furnace +#AF, offers an alternative %ethod ofbul steel%anufacture. 1t

%aes steel fro% what would otherwise be unsightl" and environ%entall" da%aging scra!

%etals. 1t also consu%es %uch less energ" than the BOF.

)he !icture shown about #AF !arts what is the !art that shown with no. /

a. 'wivel roof

!lu and

1oeable

Water cooled

teel

&ap

!ume to

cleaning head

Water cooled

fume hood

Gefractory

#

*

6

8

%

$

(

3
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b. )a! hole

c. 0efractory lining

d. 'teel scra!

. 6aing iron is the first ste! in the !roduction of steel. 1ron is usuall" %ade fro%**

a. *ronore+ coal and limestoneb. 1ron ore coal and steel scra!

c. Answer a and b are )rue

d. Answers a and b are False

#.What is the size of lab?a. upto 3000mm ide upto 320mm thickb. upto *)))mm wide I upto #()mm thickc. upto ()))mm wide I upto 3))mm thickd. upto $)))mm wide I upto ())mm thick

(. Which one is harmful impurities?a. I 4b. 0u I 4bc. only C is trued. 1 are true

3. What kind of furnace on this picture?

a. Basic ox"gen steel%aing

b. Besse%er !rocess

c. :lectric arc furnace

d. O!en5hearth furnace

*. &emperature sintering for acid isa. #3*%J0b. $30"c. #3$)J0d. #36%J0

. hile the fuel fired furnace can be used u!to a %axi%u% te%!erature of about @>> >C

the electric furnace can be used u!to a te%!erature of about ........
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a. 2>>>

b. >>>

c. '>>

,. iron ore is divided into sections based on Fe content which is included in the high5grade

of iron ore/

a) @A? Fe

b) @A


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B. )he 'oftening and 6elting

C. 3eduction < &isintegration

&. Cold 'trenght

3. What is the chemical reaction at (#)))0?

". 2CO

B. CaCO2

C. CO2

. Ca'

*. What is the product of "lectric Crc !urnace "C!?

A. Pig 1ron

B. Fine 1ron

C. 9!onge *ron

&. ?i-uid 1ron

$. What is the product of


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d. 'ubbitu%inous

e. Bituminous

@. hat !rocess ha!!ened in no @/

a. 3oasting

b. &r"ing

c. 'intering

d. Pelleti(ing

e. Nor%ali(ing("nswer B)

2. hat the na%e !rocess in no 2/

a. Crushing

b. 7rindingc. Blending

d. Peleti(ing

e. Nor%ali(ing

("nswer C)


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. )o get the best -ualit" of Hot 6etal the co%!osition of 'i should be

a. >. ; 5 >. ;

b. >.@ ; 5 >.@ ;

c. >. ; 5 >. ;

d. >.>9 ; 5 >.> ;e. >.2 ; 5 >.= ;

("nswer ")

=. hat are the raw %aterials needed in the sintering !rocess /

a. 3eturn fine scra! blended ore li%estone coe

b. 3eturn fine ore li%estone bentonite coe bree(e

c. 3eturn fine ore bentonite coe bree(e li%eston

d. 3eturn fine blended ore ser!entite li%estone coe bree(e

("nswer )

. hat are the raw %aterials needed in the sintering !rocess /

a. 3eturn fine scra! blended ore li%estone coe

b. 3eturn fine ore li%estone bentonite coe bree(e

c. 3eturn fine ore bentonite coe bree(e li%eston

d. 3eturn fine blended ore ser!entite li%estone coe bree(e

("nswer )

@. hich of the following answer that are not included in iron ore/

a. 6agnetite +FeO=, b. 'iderite +FeCO,

c. 1l%enit +Fe)iO, d. ?i%onite +Fe2O.xH2O,

e. Pirite +Fe'2,"nswer ; C

2. hich of the ele%ent co%!ounds that co%!letel" transfer to the hot %etal :

a. Alu%ina b. Phos!horus

c. Oxides of alali %etals d. 6agnesia

e. 'ilica

"nswer ; B

. hat is the %ost essential re-uire%ents on characteri(e of iron ore/a. High elasticit"

b. 6ini%u% reducibilit"

c. 6axi%al narrow si(e distribution

d. 6ini%u% of har%ful i%!urities

e. High strength

"nswer ;

=. How %uch the te%!erature re-uired to heats u! the coe in the bosh area/

a. 2@>>52>>oC b. 2>>oC

c. @>>5@>>oC d. 9>>5J>>

oC

d. L@2>>oC

"nswer ; "


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2. hat !rocess ha!!ened in no @/

f. 3oasting

g. &r"ing

h. 'intering

i. Pelleti(ing

. Nor%ali(ing

Kawaban >


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e. Nor%ali(ing

awaban : A. Crushing

.hat the na%e !rocess in no 2/

a. Crushing

b. 7rindingc. Blending

d. Peleti(ing

e. Nor%ali(ing

awaban: C. Blending

@. hich one is the right !rocess of Coe 6aing/

a, Peat ?ignite 'intering Bitu%inous 'ubbitu%inous

b, Peat 'intering ?ignite Bitu%inous 'ubbitu%inous

c, Peat 'intering ?igite 'ubbitu%inous Bitu%inous

d, Peat ?ignite 'ubbitu%inous Bitu%inous Antrasit

e, Peat ?ignite Bitu%inous 'ubbitu%inous Antrasit

2. hat is the %elting !oint of sintering Process in acid/a, @>>>C

b, @>C

c, @2>>>C

d, @>>C

e, @=>>C

. hat is the !roduct of Balling Process/

a, 'larr"

b, 6oisture

c, Powder

d, 7reen Ball

e, 6olten

=. hich one that have good -ualit" in hot %etal/

a, 6etal with co%!osition of 'ilicon >2; 6angan >; Phos!or >;

b, 6etal with co%!osition of 'ilicon >; 6angan >=; Phos!or >;

c, 6etal with co%!osition of 'ilicon >; 6angan >; Phos!or >;

d, 6etal with co%!osition of 'ilicon >=; 6angan >; Phos!or >J;

e, 6etal with co%!osition of 'ilicon >=; 6angan >; Phos!or >;

. )he !i!e to allow the ox"gen gas to burn in blast furnace/

a, 'tac

b, Bush

c, )u"ered, Heart

e, )a! hole

)here will be -ualifi" of high -ualit" coe exce!t ;

a. Have a high resistance against volu%e breaage

b. Have a high resistance against abrasion

c. Have a high resistance against che%ical attac

d. Have insufficient carburi(ation !ro!erties

e. Have a high residual strength after che%ical attac

"nswer ()

one of Coe in Blast Furnace that doesn0t burn called :

f. Boshg. 'haft


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h. &ead%an

i. 3acewa"

. 'tocline

"nswer (C)

hat is connection of 7as and Burden in Blast Furnace

a. hen the blasting gas higher the level of burden get higherb. when the gas ascent the burden will auto%aticall" descent

c. High Burden needs ?ow 7as

d. )e%!erature of burden will get low when the gas blow highl"

e. 7as and burden have no connection

"nswer (B)

1f the ore Burden 'tarts %elting in @@>>5@@> >C in what (one it will done :

f. &ead%an

g. 'haft

h. cast house

i. Heart

. Bosh"nswer (:)

#x!lain the reaction of 1ron Ore 3eduction in Blast Furnace

. Fe2O 5 FeO= 5 FeO 5 FeO> 5 Fe

l. Fe2O 5 FeO= 5 FeO 5 Fe 5 FeO>

%. FeO 5 Fe 5 FeO> 5 Fe2O 5 FeO=

n. FeO 5 Fe2O 5 FeO=5 Fe 5 FeO>

o. Fe2O 5 FeO 5 FeO=5 FeO> 5 Fe

"nswer (")

@. hich reaction !roduces the %olecule that reduces the iron ore to iron

a. Calciu% carbonat 8 silicon dioxidecalciu% silicate 8 carbon dioxide

b. Carbon8ox"gen carbondioxide

c. 1ron+111,oxide 8 carbon %onoxideiron 8 carbon dioxide

d. Carbondioxide 8 carboncarbon %onoxide

"nswer; d

2. 1n the reactions in a blast furnace what ha!!ens to %ost of the carbon %onoxide/

a. 1t reacts with carbon to for% carbon dioxide

b. 1t reacts with silica and li%estone to for% Qslag0

c. 1t co%bines with the ox"gen in the iron oxide ore

d. 1t reacts with the ox"gen in the hot air to for% carbon dioxide

"nswer; c

. )he reaction in the blast furnace to !roduce iron are su%%arised b" e-uation @ to =. )hes"%bol e-uation %a" not be nu%ericall" balanced

@. C8O2CO2

2. CO28CCO

. Fe2O8COFe8CO2

=. CaCO8'iO2Ca'iO8CO2

hich state%ent is )3D#/

a. 1n reaction @ carbon is reduced

b. 1n reaction iron is oxidised

c. 1n reaction = silicon dioxide is reducedd. 1n reaction carbon %onoxide is oxidi(ed


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"nswer; d

=. hich of @5 re!resents where slag is re%oved/

a. @

b. =

c.

d. 2"nswer; c

. hich is !roduced when li%estone co%bines with acidic

i%!urities in the blast furnace extraction of iron/

a. 1ron oxide

b. Carbon %onoxide

c. 'lag

d. Carbondioxide

"nswer; c

@. For blast Furnace iron %aing the %ost i%!ortant functions of coe are exce!t...

a. )o act as a filter for soot and dust

b. )o generate heat to %elt the burden

c. )o generate reducing carbon

d. )o !rovide the structure through which gas can ascend and be distributed through the

burden

("nswer C ; 6he correct is to generate reducing gases)

2. )he classified of iron ore b" s!ecial for% that is the na%e given to naturall" occuring

extre%el" friable high grade he%atite iron ore !owder the called is ...

a. ?u%!"

b. Natural !ellet

c. Blue dust

d. 'inter ("nswer C)

. )he sinter -ualit" is defined b" ...

a. 'i(e distribution 3eduction5&isintegration

b. Cold 'trength )he 'oftening and 6elting

c. Cold 'trength )he 'welling Pro!erties

d. 3eduction5&isintegration )he 'oftening and 6elting

("nswer " ; 9inter uality is defined by 9i4e distribution+ Cold 9trength+ 0eduction#

isintegration)

=.

3esulting !roducts of !rocesses under 9>>5>>oC and above >>59>>oC are ...


28/32

a. He%atite +Fe2O,

b. 6agnetite +FeO=,

c. FeO@$2

d. ustite +FeO,

("nswer B)

. hat are the raw %aterials needed in the sintering !rocess /e. 3eturn fine scra! blended ore li%estone coe

f. 3eturn fine ore li%estone bentonite coe bree(e

g. 3eturn fine ore bentonite coe bree(e li%eston

h. 3eturn fine blended ore ser!entite li%estone coe bree(e

("nswer )

@. hich %ix that !our into blast furnace to reduce iron ore to be an iron/

a. Coe and li%estone 8

b. '!one iron and coe

c. Carbon and calciu%

d. '!onge iron and li%estone

e. Carbon and scra!2. After reduction in blast furnace which !roduct that had been a!!ear/

a. '!onge iron and slag

b. 1ron and slag 8

c. 'teel and slag

d. 'ilica and steel

e. 'teel and carbon

. After steel are %aing fro% #AF and BOF %etode how we sha!e steel into slab and

etc/

a. Continuous cating 8

b. 6achining

c. 1nfes%ent casting

d. 'and casting

e. 1nection %olding

=. 'lab has been sha!ed for use to %ae/

a. Platehot rolled and cold rolled coil 8

b. 3odebartube

c. 'tructural sha!erail

d. Cranshaft !isto%

e. '!iral s!ring cabel

. How we get the coe/

a. 6ine coel fro% the earth Crushed coal and Heating the coal around 2= hour at@@>> oC 8

b. 6ine coe fro% the earth

c. 6ine coal fro% the earth and onl" crushed it

d. 6ine coal fro% the earth and onl" heated it at @@>> oC

e. Heat a dust at @@>> oC

&he picture below will be used to answer uestions number #and (


29/32

@. )he right answer for A B and C are

a. Coe Coal and 1ron Ore

b. 1ron Ore Coe and Coal

c. 1ron Ore Coal and Coe

d. Coal Coe and 1ron Ore

e. Coal 1ron Ore and Coe

2. )he right answer for & and # are

a. Coe and Pellets

b. Coe and 'cra!

c. 'cra! and Pellets

d. Pellets and 'cra!

e. 'inter and 'cra!

)he !icture below will be used to answer -uestions nu%ber

. )he right answer for A B and C are

a. Hae%atite ustite and 6agnetite

b. Hae%atite 6agnetite and ustite

c. 6agnetite Hae%atite and ustited. 6agnetite ustite and Hae%atite


30/32

e. ustite 6agnetite and Hae%atite

=. )o get the best -ualit" of Hot 6etal the co%!osition of 'i should be

f. >. ; 5 >. ;

g. >.@ ; 5 >.@ ;

h. >. ; 5 >. ;

i. >.>9 ; 5 >.> ;. >.2 ; 5 >.= ;

. )o get the best -ualit" of Hot 6etal the co%!osition of %anganese should be

a. >. ; 5 >. ;

b. >.@ ; 5 >.@ ;

c. >. ; 5 >. ;

d. >.>9 ; 5 >.> ;

e. >.2 ; 5 >.= ;

,. 6he following is the reason why the blast furnace uses hot air+ exce!t . . .

a. 3eaction is %ore efficient

b. 'aving the use of coe

c. as a reduction gasd. 3educe %oisture contain

2. h" is re-uired sintering or !elleti(ation !rocess/

a. to efficienc" because >; of iron ore !rocessing have done when sintering or

!elleti(ation

b. to efficienc" because @>; of iron ore !rocessing have done when sintering or

!elleti(ation

c. to efficienc" because >; of iron ore !rocessing have done when sintering or

!elleti(ation

d. to efficienc" because =; of iron ore !rocessing have done when sintering or

!elleti(atione. to efficienc" because 2>; of iron ore !rocessing have done when sintering or

!elleti(ation

5. 6he following is the harmfull im!urities+ exce!tD

a. K

b. )i

c. Co

d. Ag

e. Ni

'. hich is a function of coe. . .

a. as a reduction gas

b. as a sieve

c. !roviding carbon

d. se!arating slag

e. as the su!!ort structure of the blast furnace

. Ehy melting tem!erature of slag so low exce!t. . .

a. save coe

b. to s!eed u! the free(ing !rocess

c. !revent deadloc in the slag !it

d. increase a%ount of slag

@. hat is the che%istr" for%ula of He%atite/

a. Fe2Ob. Fe2OH2O


31/32

c. FeO=

d. FeCO

e. Fe'22. hat is the tu"ere for/

a. As a gate to enter the li%estone

b. As a gate to enter the hot gasc. As a gate to enter the iron ore

d. As a gate to enter the coe

e. As a gate to enter the slag

. hat is the che%istr" for%ula of slag/

a. 'iO2

b. Ca'iO

c. CaO

d. CaCO

e. FeO

=. h" is the !roduct of the blastfurnace trans!orted into Basic Ox"gen Furnace/

a. )o decrease the grade of the carbonb. )o increaase the grade of the carbon

c. )o change the color of the !ig iron

d. )o increase of the densit" of the !ig iron

e. )o increase the fluidit" of the !ig iron

. How big is billet/

a. D! to @> %% s-uare

b. D! to around >> %% either as-uare or rectangular

c. D! to >>> %% wide and u! to 2> %% thic

d. D! to @>>> %% rectangular

e. Ball with the radius u! to @> %%

)he following ste!s of !elleti(ing !rocess are

a. dr"ing < slurr" < grinding < balling < indurating

b. dr"ing < grinding < balling < slurr" < indurating

c. slurr" < indurating < dr"ing < grinding < balling

d. dr"ing < grinding < slurr" < balling < indurating

e. slurr" < balling < indurating < dr"ing < grinding

"nswer ()

1n !elleti(ing !rocess the rotar" iln finishes the induration and is o!erated at

f. >>5J>>>C

g. >5@>>>C

h. @2>>5@>>

Ci. @@>>5@2>>C

. J>5@>>>C

"nswer (C)

For blast furnace iron %aing the %ost i%!ortant functions of coe are except

. to !rovide the structure through which gas can ascend and be distributed

through the burden

l. to %ae blast furnace coe of high strength with acce!table reactivit" and

at co%!etitive cost

%. to generate heat to %elt the burden

n. to !rovide the carbon for carburi(ation of the hot %etal

o. to act as a filter for soot and dust"nswer (B)


32/32

)he !lace where the %aterials are screened and then weighted before final deliver" into the

furnace is

!. dust catcher

-. venturi scrubber

r. cast house

s. tor!edo cart. stoc house

"nswer (:)

hat is !roduct resulted of the rolling !rocess that si(ed u! to >>>%% wide and 2>%%

thic

u. 'lab

v. Bloo%

w. Billet

x. Bars

". 3ods

"nswer (")

problem and answer in iron and steel making process

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