Products

NATURAL LOW-FE WOLLASTONITE

APPLICATIONS
1. The ceramic industry
when sufficient wollastonite is added to ceramic material, the baking temperature can be decreased, and the baking duration greatly shortened to one rapid low temperature bake, thus saving fuel and reducing production costs. At the same time the mechanical properties are improved cracks and streaks on the products are eliminated and quality raised.
2.The paint and coating industry
When wollastonite is used as a filling or milking agent in paint, a super quality, brightly coloured paint can be obtained. The paint will give a good uniform coating and have mildew-proof and weather-proof properties.
White wollastonite is a good raw material for high quality white and pastel coating. It is easy to apply with a smooth surface. It is also highly weather-resistant.
3. The rubber and plastic industry
Wollastonite can be used to strengthen the filling agents of rubber and plastic. In thermosetting and thermoplastic moulding and casting resin, it has good heat-resistant properties and improves stability.
In epoxy resins, it will reduce water absorption and dielectric constant before plasticizing.
4. Other uses
wollastonite is also used as : protective slag in casting silicon-steel, electrode coating; lagging material; ceramic moulds and bonding agent for abrasives; a filling agent in paper making, the trace mineral in the production of white cement and special electric ceramics.

P.s: product specifications can be discussed upon customers' request.

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WOLLASTONITE

Usage:
Wollastonite is used in ceramics, paint, friction products (brakes and clutches), joint compounds, refractories, rubber, wallboard, and metallurgical applications. In ceramics it decreases shrinking, permits fast firing, reduces cracking, and also prevents glaze defects. In paint it acts as a PH buffer to help resist weathering. It improves tensile and flexural strength of plastics. It also improves the stability of plastics at raised temperatures. One other thing that wollastonite is used for is as a flux for welding, or controlling casting speed during continuous casting of steel,. These are used throughout Europe and are catching on in the US.

1.     Glaze grade 200-400 mesh wollastonite powder

SIO2

CaO

Fe2O3

L.O.I.

CO2

49%

45%

0.5%

1.5%

1.5%

2.     Ceramic grade 200-325 mesh wollastonite powder

SIO2

CaO

Fe2O3

L.O.I.

49%

44%

0.5%

1.5%

3.     Filler grade 325-2500 mesh wollastonite powder

SIO2

CaO

Fe2O3

L.O.I.

49%

43%

0.5%

1.5%


4.     WOLLASTONITE FOR METALLURGICAL APPLICATIONS

GRADE JILIN-WA

80mesh 120mesh 200mesh 325mesh 0 -300MM, or other size.

Chemical name

CaSiO3

CaO

43-46%

SiO2

48-53%

Fe2O3

0.5%

Al2O3

0.4%

MgO

2.0%

TiO2

0.02%

S

0.02%

P

0.02%

Loss on ignition(1050 o)

3.5%

Screen residue

2% (powder)

Screen residue

10%(Small particles)



GRADE JILIN-WB

Chemical name

CaSiO3

CaO

38-43%

SiO2

47-53%

Fe2O3

0.5%

Al2O3

0.5%

MgO

2.0%

TiO2

0.02%

S

0.02%

P

0.02%

Loss on ignition(1050 o)

6%

Sieve residue

2% (dust)

Sieve residue

10%(Small particles)



PHYSICAL INDEX

Appearance

white

Obsorption oil value

20-26

Form

lump or powder

Mol.wt.

116

Refractive index

1.63

pH value

8.9-9.7

Moths hardness (Moths)

4.5-5.5

Coefficient of expansion (mm/mm/'c)

4.5-5.5

Melting point (0'C)

1480



5.     Welding grade wollastonite powder

SIO2

CaO

Fe2O3

L.O.I.

(1050)

MgO

 S

P

49%

46%

0.3%

1.2%

1%

0.01%

0.01%

6.    Acicular wollastonite powder

Acicular wollastonite powder is an ideal substitution of as industries because it is nonpoisonous an innocuous. It can use to ceramics, plastic, construction material, paint, metallurgical and many other expanding list of application economy.

It is widely used in fireproof board, huge ceramic board as alkali resisting wall-board, Si-Ca board, fram filtration and due to the high quality of raw material, advanced process scientific management.

Technical specification:
SiO2: 50.5%; CaO: 45-47%; Fe2O3: 0.4%max;
P: 0.01%max; S: 0.01%max; Aspect ratio: 10:1 to 30:1
Moisture: 0.5%max; L.O.I.: 3%max

Mesh: 60/100/200/325/400/1250/3000 mesh 95-98% min passing through.Whiteness:90-92%

Packing: in plastic woven bag of about 25/50kgs net or in 1 m/t bag as required.

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