Mining waste reduction methods

MIN-NOVATION Mining and Mineral Processing Waste Management Innovation Network

Mining Waste Reduction Methods

PhD Veiko Karu, Tallinn University of Technology, Department of Mining

PROJECT PARTNERSHIP

Mapa do wklejenia

STUDY TRIPS

PROJECT GOALS

Bringing mining sector stakeholders together

Promoting innovative approaches to mining waste prevention, recovery, recycling and re-use

Pursuing cross-regional initiatives

• ESTONIA

• Mobil installation for recovery waste from oil shale and limestone mining

• FINLAND

• Lab for mining and processing waste research

• POLAND

• Installation for recovering waste from coal mining

• SWEDEN

• Mobil installation for recovering of different solid waste materials (slags,

alum shale residues, fly ashes)

PROJECT PILOT UNITS

MIN-NOVATION Mining and Mineral Processing Waste Management Innovation Network

PILOT INVESTMENT FOR ESTONIA

“Waste-to-product mobile unit”

Oil shale waste rock

Oil shale for oil or electricity

Limestone for aggregate or backfilling

Pilot unit

THE PRINCIPLE OF OPERATION Crushing bucket

THE PRINCIPLE OF OPERATION Mini wheelloader

THE PRINCIPLE OF OPERATION Sieving unit

Enrichment unit for oil shale

Mini beltconveyor

MIN-NOVATION Mining and Mineral Processing Waste

Management Innovation Network

PILOT INVESTMENT FOR POLAND

1 – wastes charger

2 – crusher conveyor

3 – retaining construction

4 – impact crusher

5 – vibrating screens

6,7,8,9 – belt conveyors

10 – product containers

11 – de-dusting system

INSTALLATION PROJECT

Impact crusher M5:

• Capacity 1,5 tph

• Power 7,5 kW

• 1000 RPM

INSTALLATION PROJECT

• Wastes loaded from waste stockpile by loader to charger

• From charger material is directed to impact crusher M5

• After crushing material is led to two-deck vibrating screens

• Fraction >31.5 mm is redirected to impact crusher

• Fraction 5-31.5 mm (final product) is put to product container

• Fraction 0-5 mm („Secondary waste”) is directed to second container

• Product containers periodically cleared to product stockpiles

WP 5 Pilot investment by Örebo Univ. (P4)

A mobile unit for recovery of metals from various categories of mining waste and metal-rich process residues (1) Crushing/milling (2) Leaching (3) Recovery of elements from solution in sequence: • A combination of a jaw crusher and another type of mill

crushing the waste down to roughly 0.1 mm. • A leaching apparatus designed to leach (using manipulated

water solutions) solid waste using high pressure and temperature.

• A mixer-settler unit for recovery of metals by using liquid/liquid extraction

WP 5 Pilot investment by Örebo Univ. (P4)

MIN-NOVATION Mining and Mineral Processing Waste

Management Innovation Network

FINNISH PILOT INVESTMENT

Kainuun Etu Ltd

DISCRIPTION

crushing grinding screening sieving flotation

filtering fine grading

crushing grinding screening sieving flotation

filtering fine grading

Thermodymanic reactions, material optimization, chemical

characterization, material modification…

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THE PRINCIPLE OF OPERATION - ELEMENTS AND CAPACITY

Elements of investment (by now)

Capasity: so far only preliminary experiences . XRF: 20 min / sample; TGA-DT, DSC: 3 samples / shift, furnace: 1 heating / 1 kg / shift.

XRF MiniPal4 for chemical characterization of the samples

Chamber furnace for material modification

TGA-DT, DSC for thermodynamic reactions and material optimization

WAYS TO KEEP INFORMED ABOUT MIN-NOVATION

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Join the Min-Novation Linked-In group

Min-Novation conference at the end of 2013 in Poland

Contact project manager: ostrega@agh.edu.pl

or communication officer: piotr.szmigielski@fii.org.pl

See Min-Novation website: www.min-novation.eu

THANK YOU !

Veiko Karu Tallinn University of Technology, Department of mining veiko.karu@ttu.ee