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硅灰石--Wollastonite
    發布時間: 2020-08-31 10:51    

硅灰石--Wollastonite

硅灰石--Wollastonite

HAITANG ROAD, XUGOU,LIANYUNGANG,JIANGSU,CHINA

TEL:0518-85865352                 FAX:0518-81882600

http://www.florenciahoteles.com/                 e-mail:mikezheng@htsinosky.com

 


Product Specification

Character

White Fibrous or Powder

Standard number

GB

                       

Product code: 014100905

Introduction

Wollastonite belongs to three cable-stayed system and it is a kind of fine sheet crystal, its aggregate is radial or fibrous. Its color is white, sometimes with light gray or light red. Glass luster, cleavage face shows pearl luster. The hardness is 4.5 to 5.5, and the density is 2.75 ~3.10g/cm3. It is completely dissolved in concentrated hydrochloric acid. Generally, it is acid proof, alkali resistant and chemical resistant. The hygroscopic property is less than 4%. Low oil absorption, low conductivity, good insulation. Wollastonite is a typical metamorphic mineral, which occurs mainly in the contact zone between acid rock and limestone, and is associated with Fu Shan stone and garnet. It is also found in deep metamorphic calcareous crystalline schist, volcanic eruption and some alkaline rocks. Wollastonite is an inorganic needle like mineral with non-toxic, chemical corrosion resistance, thermal stability and good dimensional stability. It has glass and pearl luster, low water absorption and oil absorption, good excellent mechanical and electrical properties as well as good strengthening effect. Wollastonite products are long fiber and easy to separate, with low iron content and high whiteness. The product is mainly used as reinforcing filler for polymer matrix composites. Such as plastics, rubber, ceramics, coatings, building materials and other industries.

Wollastonite

Molecular Formula

Mg(OH)2

Theoretical value

MgO69%  H2O 31%

Color

White, grey, light kelly

Whiteness

80-85

Decomposition temperature

340

Moh’s hardness

2.5

Specific gravity

2.4

Grade

MgO

Fe2O3

SiO2

CaO

Al2O3

H2O

Common Grade

>63

<0.4

<3

<2.5

<0.2

27-31

Super Grade

≥65

≤0.3

≦2.5

≦1.5

≦0.2

28-31

Metallurgical Grade Wollastonite

Type

SiO2

CaO

TFe2O3

L.O.I.

CO2

A

50%min

45%min

0.6%max

1.5%max

1.4%max

B

49%min

43%min

1.0%max

4.0%max

Paper grade wollastonite

L/D

SiO2

CaO

Fe2O3

L.O.I.

Whiteness

8-10:1

49%min

43%min

0.35%max

2.5%max

88mi

Ceramic grade wollastonite

Type

SiO2

CaO

TFe2O3

L.O.I.

CO2

A

49%min

44%min

0.5%max

0.25%max

2.5%max

B

45%min

38%min

1.0%max

0.35%max

6.8%max

Application

·         Ceramic industry : Glazed ceramic, Sanitary porcelain, porcelain for daily use.Artistic porcelain, Electric ceramics, High-frequency and loe-loss wireless electric ceramics, Chemical ceramic, Glaze and Coloring materials, Etc

·         Chemical industry:  As the Filling material for paint, coating, Pigment, Rubber, Plastics and Resin

·         Metallurgy industry: The Protecting slag and covered agent of heat insulation and metallurgy

·         Building industry:  As the Auxiliary building material that substitute asbestos, as the Raw material for white cement and acid-proof and Alkali-resisting microcrystalline glass, as the Flux of the glass and Filling material of new-type wall.

·         Electronic industry : As Electronic insulating material, as the Coatings for fluores centlamp, Display tube do the television set and X-ray fluorescent screen.

·         Mechanical industry: As high-quality Welding material, Binding material of grindingapparatus and used for Casting mould.

·         Paper making industry: As the Filling material and Coating of Paper.

·         Auto industry :  As the Filling material for Clutch and Brake.

·         Agriculture:  As the Soil modifier and Plant fertilizer.

·         Other aspects : As the Filter medium, as Refractory material of glass melting kiln.




                                          

    Date: Jul. 13th, 2018                 Signature:

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