Mining waste: MIN-NOVATION

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Publication: "Pilot Unit for Mining Waste Reduction Methods"

Pilot Unit for Mining Waste Reduction Methods
Veiko Karu 1 , Tiit Rahe 2 , Erki Närep 3 , Vivika Väizene 4 , Juan da Costa 5

1-5 Tallinn University of Technology
DOI: doi: 10.7250/iscect.2013.008

Possibilities of fine material removal

Summary of bachelor study on "Possibilities of fine material removal". Author: Erki Närep

Limestone is one of the most common minerals in Estonia. It is mainly used as raw material for the production of splinters and cement. The limestone bed consists of upper layers with high quality limestone and lower layers with clay-rich limestone. Producing splinters and cement with a clay-rich limestone requires additional processing, in order to reduce clay content using fine material removal.

The aim of this study was to test and evaluate three different methods for fine material removal – jigging, pressure washing and dry sieving, and research the appropriate equipment. As a reference method, washing by hand was also carried out which represented the ideal subsample. In this study, fine material is defined as material sized 0-4 mm. The clay-rich limestone sample material used in the experimental work was taken from Väo IV open cast. The sample material was first homogenized and distributed into subsamples. The subsamples were then processed using the mentioned methods. Finally, sieve analysis was carried out with the processed subsamples in order to evaluate the effectiveness of these methods.

The results showed that the most effective method is dry sieving, which removed the full percentage of fine material. Jigging removed 70% and pressure washing removed 29% of the 0-4 mm sized material. The appropriate equipment for fine material removal is McLanahan’s Rotary Scrubber, McLanahan’s Log Washer and Haver & Boecker’s Hydro Clean Washing System.

Dry sieving proved to be the most effective method. However, it is not industrially applicable due to high time expenditure and energy consumption. Pressure washing as an independent method is also not applicable due to low percentage of fine material removal. Therefore, the most effective industrially applicable method is jigging. The highest effectiveness would be achieved by combining both, jigging and high pressure washing (as additional processing), which theoretically should remove all fine material. Hydro Clean Washing System has the lowest water consumption, appropriate productivity, low upkeep, it is environment friendly and it uses the previously mentioned combined method which makes it the best choice for fine material removal today.

The best method for fine material removal on the basis of Väo IV open cast:

- Extraction with hydraulic hammer

- Preliminary crushing with jaw crusher

- Fine material removal with Hydro Clean Washing System

- Producing splinters with a crusing complex

- Processing removed fine material with CDE equipment

MIN-Novation Eesti: Agenda: "Mining Waste Management in Estonia", 16.05.2013

MIN-Novation Eesti: Päevakava: Rahvusvaheline konverents "Mining Waste Management in Estonia", 16.05.2013:

MIN-Novation Eesti: “Mining waste management in Baltic Sea Region: MIN-NOVATION project”, Piotr Szmigielski, FII

MIN-Novation Eesti: “Mining waste management in Baltic Sea Region: MIN-NOVATION project”, Piotr Szmigielski, FII:

MIN-Novation Eesti: “Financing for technology-based startups/companies, including mining waste management companies in Estonia“, Kati Nikopensius, Startup Incubator Tehnopol

MIN-Novation Eesti: “Financing for technology-based startups/companies, including mining waste management companies in Estonia“, Kati Nikopensius, Startup Incubator Tehnopol:

MIN-Novation Eesti: “Role of Environmental Board in Mineral Extraction”, Tiit Kaasik, Environmental Board

MIN-Novation Eesti: “Role of Environmental Board in Mineral Extraction”, Tiit Kaasik, Environmental Board:

MIN-Novation Eesti: “Mineral Resources of Estonia”, Tarmo All, Ministry of Environment

MIN-Novation Eesti: “Mineral Resources of Estonia”, Tarmo All, Ministry of Environment:

MIN-Novation Eesti: “Waste Management challenges in Estonia” Ulvi-Karmen Möller, Ministry of Environment

MIN-Novation Eesti: “Waste Management challenges in Estonia” Ulvi-Karmen Möller, Ministry of Environment:

MIN-Novation Eesti: “Cement production and waste management”, Riho Iskül, Kunda Nordic Cement, Heidelberg Group

MIN-Novation Eesti: “Cement production and waste management”, Riho Iskül, Kunda Nordic Cement, Heidelberg Group:

MIN-Novation Eesti: "National Energytechnology Programme a way to sustainable economy", Jaanus Sahk, National Energytechnology Programme

MIN-Novation Eesti: "National Energytechnology Programme a way to sustainable economy", Jaanus Sahk, National Energytechnology Programme:

MIN-Novation Eesti: “Oil Shale Competence Center”, Kalle Pirk, Oil Shale Competence Center, TUT

MIN-Novation Eesti: “Oil Shale Competence Center”, Kalle Pirk, Oil Shale Competence Center, TUT:

International conference "Mining Waste Management in Estonia", 16.05.2013

1. “Mineral Resources of Estonia”, Tarmo All, Ministry of Environment
2. “Mining Waste challenges in Sweden”, Stefan Sädbom
3. “Financing for mining waste management activities in Estonia“, Kati Nikopensius, Startup Incubator Tehnopol
4. "National Energytechnology Programme a way to sustainable economy", Jaanus Sahk, National Energytechnology Programme
5. “About MIN-NOVATION project”, Anna Ostrega, AGH
6. “Waste Management challenges in Estonia” Ulvi-Karmen Mõller, Ministry of Environment
7. “Cement production and waste management”, Riho Iskül, Kunda Nordic Cement, Heidelberg Group
8. “Oil Shale Competence Center”, Kalle Pirk, Oil Shale Competence Center, TUT
9. “Role of Environmental Board in Mineral Extraktion”, Tiit Kaasik, Environmental Board

www.ttu.ee/min-novation

Study and sample tour with MIN-NOVATION partners from Finland, 27...30.05.2012

MIN-NOVATION project partners from Finland Kainuun Etu and University of Oulu and TUT Department of Mining had together the technical tour in Estonian mining sites. Guides wareTUT Mining Department teaching assistant Veiko Karu and docent Heidi Soosalu.

Mining museum at Department of Mining: