re Damaged Limestone Weighfeeder

Dear Ted,

Thanks for your usual support, at present we have not been able to try your recomendations.

partly because of logistics and also our VRM issues, production always use the speed of the limestone feeder to correct the disturbances from vrm operations.

we are still always on our toes to prevent any major issue

Thanks once again.

Please what are the major issues with low and high Liquid phase. i.e from practical experience what issues do they cause and at what point

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re Damaged Limestone Weighfeeder

Hello Haliff,

Thanks for the feedback. I hope you solve your limestone feeding problem soon.

With regard to liquid phase, the major issues are as follows.

If liquid phase is high (>~30%):-

(1) As liquid phase content is increased there will initially be increased coating formation with the possibility of rings. However, more coating is not necessarily good coating and at extremely high liquid phase content, washing out of the coating followed by immediate attack of the refractory bricks themselves may occur.

(2) Increased nodulisation of clinker with the possible formation of clinker balls.

(3) Hard, dense clinker which is very difficult to grind.

(4) Unstable kiln operation.

(5) Lower cement strengths due to a reduction in the silicate minerals (C3S + C2S)

If liquid phase is low (<~22%):-

(1) Very little coating, which in extreme instances can lead to exposure of the refractory bricks and excessive brick wear.

(2) Poor nodulisation of clinker and excessive generation of dust.

(3) Clinker is hard to burn, making it difficult to control free lime, which leads to high thermal load in the kiln and unstable kiln operation.

Regards,

Ted.

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