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REFINING SLAG (Fused calcium aluminate \Sintered calcium alumina)

Refining slag also called Calcium aluminate, which is divided into fused premelting calcium aluminate and sintered calcium aluminate. Fused premelting calcium aluminate is a variety of high-quality raw materials in the furnace through a certain temperature smelting; sintered calcium aluminate is a variety of high-quality raw materials in the rotary kiln high temperature calcination.


Calcium Aluminate for Metallurgy is a kind of auxiliary material for steelmaking, as it speeds up secondary metallurgy process, especially faster desulphurization, Improves overall steel cleanliness and makes high grade steel with cheaper cost.


Specification of Fused calcium aluminate:

Specification

Chemical   Composition(%)


CaO

Al2O3

SiO2

Fe2O3

TiO2

MgO

S

Size


A

49-54

41-49

≤4.0

≤2.5

≤3.0

≤2.0

≤0.1

5-30mm

B

49-54

41-45

≤4.0

≤1.8

≤2.8

≤5.0

≤0.1

10-25mm

C

53-59

30-38

≤3.5

≤1.5

≤3.0

≤2.0

≤0.1

3-8mm

D

50-55

36-44

≤3.5

≤1.5

≤3.0

≤2.0

≤0.1

5-50mm

E

32-36

39-43

≤5.5

≤3.0

≤3.0

11-15

-

3-50mm

F

32-35

52-55

≤5.0

≤1.5

≤2.5

≤5.0

-

5-30mm

Specification of Sintered calcium aluminate:

Specification

Chemical   Composition (%)

CaO

Al2O3

SiO2

Fe2O3

TiO2

MgO

S

Size

A

45-50

35-40

≤6.0

≤3.0

≤2.5

≤4.0

≤0.15

5-30mm

B

≥35

≥50

≤6.5

≤2.5

≤3.0

≤3.5

≤0.15

5-45mm

C

30-38

50-58

≤6.0

≤3.0

≤3.0

≤4.0

≤0.15

200mesh-0

Calcium aluminate advantages:

※ Uniform chemical compositions, low melting point, high melting speed, and short smelting time;

※ It has no fluoride and doesn’t erode furnace lining and ladle, and it is compact, non-absorbent,and easy to storage as well;

※ Stable phase and fast dust-reducing speed, rapid desulfurization effect stabilized at 60%, and suppresses phosphorus into molten steel;

※ Improving the protective effect and reducing erosion to ladle lining.