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CGB-Lab test 3 ( Cement fluidity & 28D strength )

2020-08-10 17:37:28

As CGB technology has increasingly caught the eyes of the global cement industry thanks to its remarkable performance in power saving,we’d like to share the lab test a couple years ago ( 2016 ) in China, which gives better picture on how to put this new technology into use properly after replacing steel ball.


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φ700mm×700mm  Lab Batch mill

It is equiped with torquemeter that can read the power consumption directly.Below is the technical parameter tables:

ItemDescriptionTechnical Data


Mill Shell Dimension

φ700×700mm  Effective. 600×600mm


Gear reducer

XW635       Raito:( 291)






 Y132M47.5  Power7.5kW


Liner Shape


2.Clinker and FGD gypsum

Literally minimum 2 raw materials shall be used. However in order to avoid deviation due to heterogeneous mixture , one-component clinker was applied as raw materials during the test. When it came to the cement quality test, ground FGD ( Fuel Gas Desulfurization)gypsum is blended for various performance test.The technical data of the raw materials are as follow:

Clinker bond:


Milling method:

Roller press

Clinker Blaine:


Clinker fineness:


FGD gypsum blaine:


3.Mill loading rate ( CGB -ceramic ball Vs steel ball)

During the test, both CGB and steel balls were set with loading rate at 24% with media scheme as below:  ( steel balls=174kgs,CGB= 84kgs, clinker charge=20kg/ each time)





4.Cement product fluidity analysis:

Below chart demonstrates at various blaines the cement fluidity variation ( initial and 60minutes ) for Steel ball and CGB-ceramic ball.

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Above chart suggest, there’s no remarkable impact to the cement fluidity from the initial to 60 minutes wether it’s steel ball or ceramic ball. The variation scope of these 2 grinding medias test are nearly the same.

5.Cement product 3D and 28D strength analysis:

Below chart demonstrates at same blaine the cement strength ( 3 days & 28 days ) with Steel ball and CGB-ceramic ball as grinding media.

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Rotation speed are the same @ 40.4 rpm

Above chart suggests as compared with steel ball,when CGB is applied the 3D strength witness a slight drop,however the 28D strength increase by 1.5~2MPa。

In next article introducing lab test serie-4, we are going to share the comparison between various grinding media on cement product water requirement of standard consistency and summary of this lab test.