2015 04 01 Wednesday Seminar Seoyeon Jeong (1)

8/17/2019 2015 04 01 Wednesday Seminar Seoyeon Jeong (1)

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Seoul National UniversityGeotechnical and Geo-environmental Eng. Lab.

Seoyeon Jeong

Controlling Heavy Metal Release and pH from Tailing Dam

Using Permeable Steel-making Slag Cover System

2015. 04.01


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Geotechnical and Geo-environmental Eng. Lab., Seoul ational 2

Contents

1. #ntroduction

2. $aterial" % $ethod

&. 'e"ult % (i"cu""ion

4. Summary % )lan"


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3

Geotechnical and Geo-environmental Eng. Lab., Seoul ational

Introduction


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Introduction 1. *urrent Statu" o+ $ine" in Southorea

Category General mine Coal mine Total

Metal Nonmetal Subtotal

Operating 56 531 587 6 593

ban!one! 2"11# 2"198 2"299 394 4"8#3

Total 2"166 2"83# 4"996 4## 5"396

2 o+total

$e%& 광해실태조사 '(#9&1#)*1#&8+

',nit- no&+

/$ine ater leaage /Leaving a"te roc" andtailing out"ide ithout 3ro3ertreatment

/Scattering du"t

$e%& Se.on! 5year/ program %or pre0ention o% mine !amage'11" Mini/try o% Tra!e"n!u/try an! nergy+


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Introduction 2. )roblem" o+ mine"

at i/ cid $ine (rainage

eS2 6 78292 6 :29 ; e26 6 2S94

2-

6 2:6

e26 618492 6 :6 ; e&6 6 182:29

e&6 6 &:29 < e=9:>& =S> 6 &:6

te outo o% a.i!i. ater %rom metal mine/or .oal mine/

Sour.e/ o% M- tailing pile/ an! pon!/"mine a/te ro. !ump/

:o p; '3)5+ Contain/ 0ariou/ ea0y metal/ Generate re!!i/ bron pre.ipitate


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Introduction

/?ailing 3ile" o+ @olgye mine

2. )roblem" o+ mine"

at i/

?ailing

Mine !ump/ Te material/ le%t o0er a%ter te pro.e//

o% /eparating te 0aluable %ra.tion %romore


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Introduction 2. )roblem" o+ by-3roduct" di"3o"al

at i/ Steel-maing SlagA

- Slag generation amount/ i/ in.rea/ingannually

- Te .o/t/ o% !i/po/ure i/ in.rea/ing

- ,nlie %urna.e /lag" /teel



Introduction &. *once3t % 9bBective"

$e26 and :6 'elea"ing

;?

Me2?

Me2?

;?

;?

;?

@hen it rain"C

.i! rain 'p; aroun!5+

;?

;?

;?

;?

;?

;?

;?

Me2?

Me2?

Me2?

?ailingdam




@hen it rain"C

.i! rain 'p; aroun!5+

Slag*over

•

>ree


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Soil Aoreater

Aoreater

=cid>'ain

=cid>'ain

9:- and inderrelea"e

$e26and

:

6

relea"ing

@ithout Slag *over

Soil

@ith Slag *over

;?

Me2?

Me2?

;?

;?

;?

inder

9:-

;? relea/e NeutraliBation

;??O;




?ailing

Slag

#n the long termC.

:ard 3an +orm"

H loering value

@ithout Slag *over @ith Slag *over

$y 9bBective" areC p; neutraliBation

e.rea/ing ea0y metal relea/e

'n te long term+ >ormation o% ar! pan'a layer o% pre.ipitate+

at the tailing dam in

abandoned mine"


12/2212Geotechnical and Geo-environmental Eng. Lab., Seoul ational

Materials & Methods



Materials & Methods

Steel-maing Slag

1. $aterial"

Element

"

Si92 l29& ?i92 e9& $g9 *a9 a29 29 $n9 )295 ?otal

t&'E+ 14&23 5&23 #&62 35&67 2&95 65 #&31 #&15 3&6 1&34 1##

?ailing

- Gangyang /teel

.ompany- F&2#'#&85mm+)F&4#'#&425mm+

- ,lin metal mine

- H F&4#'#&425mm+

)b *u " :g *d *rI6 * ) ?*E )*E

$egulation

:e0el 'mg

:+

3 3 1&5 ##5 #&3 1&5 1 1 #&1 #&3

mount'mg

:+

N # N N N N N N N N

*om3onent

H:ea.ing te/t re/ult/ o% /teel



Materials & Methods 2. $ethod"

. atch E3eriment . *olumn

E3eriment

'ain+all"imulator

Slag only 8

"lag 6 othermateria

?ailing

Sam3ling bottle

Slag or tailing

3:5 "olution

gitationit rotary /aer

p; an! .emi.al.on.entration

analy/i/

3: and *onc. Soli!



Materials & Methods 2. $ethod"

. atch E3eriment E3ected 'e"ult

p; neutraliBation ;ea0y metal relea/e

re!u.tion

12/lag

tailing

12/lag

tailing

3: $etalconc.

?ime=hr>

?ime=hr>

7

5

Slag

Slag 6?ailing

?ailing



Results & Discussion



# 3 6 9 12 15 18 21 24#

2

4

6

8

1#

12

?ime=hr>

3:

Results & Discussion

1. atchE3eriment

Slag

Slag 6 tailing

?ailing

. atch E3eriment Soli!



Results & Discussion 2. $ethod"

# 3 6 9 12 15 18 21 24#

1

2

3

4

5

6

7

8

9

1#

?ime=hr>

3:

Slag

Slag 6 tailing

?ailing

Soli!



Summary & Plans


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Summary & Further study

Summary

- Most of mines in South Korea are abandoned and not under proper

management so that they are creating a lot of environmental damage.

Especially the contamination resulting from lea!age "#M$% affect the local

environment and tailing dam is one of the sources of #M$.

- Steel-ma!ing slags is a by-product of steel-ma!ing process and decrease in

ne& constructions could lo&er the recycling rate.

'ecycling the slags as a tailing dam cover can be a solution.

- Slags cannot control #M$ solely &hich means that it needs to be modified

or added other materials.

1. Summary



Summary & Further study

(urther study

2. urther"tudy


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?han you

Geotechnical and Geo environmental Eng Lab Seoul ational

Documents

2015 04 01 Wednesday Seminar Seoyeon Jeong (1)