Towards “Zero waste mining” by installation of Limestone Washing Plant

Limestone deposits near Pennadam of Ariyalur district in Tamil Nadu are inherently interbedded with calcareous marl and clay between various grades in quality. State of the art Limestone beneficiation plant by wet scrubbing system is being employed for enriching the quality of limestone . In this environment friendly washing system, the excess water is recovered back for recycling in High rated thickener and Hydro cyclones.


Challenges

01

The very low grades beyond 18% silica are in the range of 40 % of the total reserves.

02

Dumping back without using them in the process is a waste of natural resources against the Nation’s interest

03

We had to rely on External Imported limestone and excess consumption of high grade limestone to control the quality due to such low grades

Impact

The adoption of this limestone washing system has significantly improved the utilization of very low grade minerals.

01

The entire low grade is recovered by washing away the marl from limestone

02

Procurement of External limestone have significantly reduced

03

Washing plant rejects are effectively used for backfilling of mined out voids

04

Achieved Zero waste mining and has improved our sustainability

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