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      1.  

        連云港瀚天國際貿易有限公司?

        LIANYUNGANG HANTIAN INTERNATIONAL TRADE CO., LTD

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        白剛玉--White Fused Alumina
            發布時間: 2020-08-31 10:35    

        白剛玉--White Fused Alumina

        白剛玉--White Fused Alumina

        HAITANG ROAD, XUGOU, LIANYUNGANG, JIANGSU, CHINA

        TEL:0518-81882600                 FAX:0518-81882600

        http://www.ty9b.com/                 e-mail:mikezheng@htsinosky.com

         


        Product Specification

        Character

        White, and turns blue after being burnt

        Standard number

        GB

                               

        Product code: 014100902

        Introduction

        White fused alumina is a kind of artificial abrasive. 3 oxidation 2 aluminium (Al2O3) content over 99%, and the composition such as containing a small amount of ferric oxide, silicon oxide, white. Product size according to the international standard and national standard production, granularity processing according to user requirement. Gm grain sizes of the F4 ~ F220, its chemical composition depending on the size of the particle size. Outstanding characteristic is little impact resistance, crystal size in the mill processing, particles are spherical particles, the surface dry clean, easy to bond.

        White Fused Alumina

        Crystal

        Trigonal system

        True density

        3.90 g/cm3

        Volume density

        3.60g/cm3

        Hardness

        Mr Spectral hardness

        2000 - 2200 Kg/mm2

        Moh's hardness

        9

        Colour

        White

        Turns dark blue after calcination

        Melting point

        2250℃

        Maximum service Temperature

        1900℃

        Specific heat(Cal/g. C)

        0.2620-90℃)

        Coefficient of heat conduction

        Room temperature 900℃

        (Cal/cm3. sec.℃)

        Refractive index

        e=1.760 w=1.768(Na line)

        Electrical resistivity

        30 C 300 C 900 C 1600 C(cm)

        10、16、10、13、10、5、10、4

        Coefficient of linear expansion

        7 - 9*10^-6/K (0 - 1600 C)

        Chemical property

        Reaction with acid A slight corrosion in aqua regia and hydrofluoric acid

        Reaction with alkali Only a reaction with hot alkali solution

        Effect of oxidation reduction

        Non

         

        Chemical compoitions 

        Grit

        Typical     Value

        Fine Powder 

        Typical Value

        AL2O3 MIN

        99

        99.5

        99

        99

        SIO2 MAX

        0.1

        0.05

        0.15

        0.08

        FE2O3 MAX

        0.1

        0.06

        0.15

        0.06

        K2O+NA2O MAX

        0.4

        0.3

        0.45

        0.35

        BULK DENSITY

        3.6

        3.62

         

         

        REAL DENSITY

        3.92

        3.92

        3.92

        3.93

          

        Application

        White fused alumina is the most economic grinding material suitable for both dry and wet production technology, and it’s especially suitable for the processing of rough surface. The hardness of this artificial synthetic material with sharp appearance and edges and corners is second only to diamond, and is often used in the occasions where here’s strict requirements on iron pollution. It can cut hard materials, and also can be made into sphere to processes the workpiece with precise size, so as to achieve very low roughness. Its high density, sharp, angular structure make it the most rapid cutting abrasive.
        It has good self-sharpening, naisuanjian corrosion, high temperature resistant, thermal state performance is stable. Its hardness is slightly higher than that of brown fused alumina, and its hardness toughness is slightly lower, but it has better purity, good self-sharpening, high grinding ability, low calorific value, high efficiency, good thermal stability, acid and alkali corrosion resistance, and high temperature resistance. Grinding tool made with white corundum sand is suitable for grinding high carbon steel, high speed steel and stainless steel fine-grained abrasives. White corundum sand can also be used for precision casting and the production of advanced refractory brick.





                                                  

              Date: Jan 1st, 2014                 Signature:

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