4831621686

99

difficult to observe by SEM the presence of Zn in the form of ZnO. Zn was highly associatcd to iron bearing minerals. Moreover. sonie spherical particles appear. what propose that they have been existing under the form of liquid. usually. this kind of facies occurs in fumes.

17.1

25.3

5.5

54.1

25

Magnetite	■ Hematite	Augite BGehlenite
Dolomite	Bassanite	Glass
2.C
s.s	11.6
8.6	72	52.4
10.9	11.4
92)
3.7	8.5	Ś4
		21.0
		3.6
62.6	61.3	8.6
		29 A
500	800	1050
Temperaturę (°C)
6.4	6.7	14.2
13.5	10.6	5.3
10 7	15.2	27.2
9.1	9.7
4.0		65
		8.6
56.3	57.9	40.2

500 800	1050
Temperaturę (°C)

Gypsum BAnhydrite Quartz    Calcite

(a)    100

80

£ ⁶⁰

V

C

a>

£    40

O

o

20

(b)    "»

10 0

80

£ 60 c

V

C 40    m

o

20

0

25

Figurę 4.6 Crystalline and amorphous phase transformations during firing process; (a) Raw calamine minę tailings (CPMT) and (b) Treated calamine minę

tailings (TCPMT).