Table 4 Chemical composition of the starting materials.

From: Utilization of industrial waste materials for the preparation of wollastonite by temperature-induced forming technique

Main constituents

Silica fume (wt%)

Bypass (wt%)

SiO2

92.46

13.18

TiO2

–

0.40

Al2O3

0.74

8.08

Fe2O3

2.02

4.41

MnO

0.12

–

MgO

0.42

2.12

CaO

0.33

50.32

Na2O

0.37

1.43

K2O

0.84

3.33

P2O5

0.13

0.09

SO3

0.35

6.60

Cl

0.08

7.54

LOI

1.88

2.16

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