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SiC Bushing

Silicon carbide sic bushing is a new type of high-tech and wear-resistant material in the world. It was made of high-purity silicon carbide powder, high-purity high-temperature carbon black and binders,by pouring, blanking, sintering, and sand-removing processes,made of a composite high wear...

Silicon carbide sic bushing is a new type of high-tech and wear-resistant material in the world. It was made of high-purity silicon carbide powder, high-purity high-temperature carbon black and binders,by pouring, blanking, sintering, and sand-removing processes,made of a composite high wear product.

It is currently used as a bushing in mining equipment,such as copper, gold, iron ore,nickel ore and other in non-ferrous metals.It plays a role of high wear resistance,the wear life is more than 10 times that of conventional steel bushings and alumina bushing.

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1.Application of sic bushing in the mining industry

For mine filling, the concentrate powder and tailings transportation has serious wear on the pipeline.The service life of the ore powder conveying pipeline used in the past is less than one year, and now choose silicon carbide bushings can increase the service life by more than 10 times.


2.Why silicon carbide linings are widely used in the mining industry?

Due to the wear resistance of ceramic tubes, following is a comparison of wear resistance of ceramic tubes and other materials.

Comparison of wear resistance of silicon carbide bushings

Sandblasting contrast test(SiC sand)

30%SiO2 mud slurry contrast test

Material

Reduced volume

Material

Reduced volume

97% alumina tube

0.0025

45steel

25

Silicon carbide bushing

0.0022

Silicon carbide bushing

3


3.Other physical and mechanical properties of ceramic wear resistant pipes in the mining industry

Item data
material

Strength
HV
kg/mrn2

Bending strength
MPa

Surface material

Ceramic layer density
g/cm3

Compressive shear strength MP

Resistance to mechanical shock

Thermal shock resistance

Steel tube

149

411






SiC bushing

1100-1400

300-350

smooth

3.85-3.9

15-20

15

900


4.Another feature of silicon carbide bushings used in mines - small loss of running resistance

Test on resistance characteristics of powder, slag and ash transportation,the results are as follows:

Material

Absolute roughness (△)

Absolute roughness(△/D)

Water resistance coefficient

Hydraulic transmission

Pneumatic conveying

Hydraulic transmission

Pneumatic conveying

Ordinary steel tube

0.119

0.20

7.935×104

1.343×103

0.195

Ceramic composite pipe

0.117

0.195

7.935×104

1.343×103

0.0193


5.Silicon carbide bushing connection

(1)When flexible pipes are used to connect the installation pipes, the insertion lengths of the two ends of the flexible pipe sleeve must be adjusted symmetrically. Expansion gap should be based on local conditions or design department requirements.

(2)When When using flange connection, the flange face must be flush with the end face of the composite pipe.

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SPECIFICATION


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