Extraction of fine particles from raw coal

Directorate-General For Energy

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• Publié par: DIRECTORATE-GENERAL-FOR-ENERGY
• Nombre de lectures: 22
• Langue: English
• Poids de l'ouvrage: 13 Mo

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COMMISSION OF THE EUROPEAN COMMUNITIES
technical coal research
Extraction of fine particles from raw coal
Blow-up from microfiche original
1980 EUR 6682 EN COMMISSION OF THE EUROPEAN COMMUNITIES
technical coal research
Extraction of fine particles from raw coal
NCB - London
Contract No 6220-EA/8/801
FINAL REPORT
Published by the Directorate-General
Scientific and Technical Information and Information Management
1980 EUR 6682 EN LEGAL NOTICE
Neither the Commission of the European Communities nor any person acting
on behalf of then is responsible for the use which might be made of
the following information Commission of the European Communities
Directorate General - Energy
EXTRACTION OF FINE PARTICLES FROM RAW COAL
Mining Research and
Development Establishment Commission of the European Communities
Directorate General - Energy
EXTRACTION OF FINE PARTICLES FROM RAW COAL
Final Report on ECSC Research Project 6220-EA/8/801
Duration of Project January 1975 - June 1978
Research work carried out with the financial aid from the
European Coal and Steel Community
MRDE Ashby Road Stanhope Bretby Burton-on-Trent Staffs DE 15 OQD The' work described in this report was undertaken by the Screening Group,
Coal Preparation Division at the Mining Research and Development Establishment
of the National Coal Board.
Head of Screening Group Dr Μ Ρ Armstrong
Group Staff involved R W 0'Brian, S Gilliver
This report is confidential. No part of it may be reproduced
or communicated in any way without permission.
622.767.553
EUROPEAN COMMUNITIES COMMISSION
Extraction of fine particles from raw coal:
final report on ECSC research project
6220-EA/8/801.
MRDE, 1979. 78pp.
MINING RESEARCH AND DEVELOPMENT ESTABLISHMENT
PROBABILITY SCREEN; FINES; COAL PREPARATION CONTENTS
SYNOPSIS
DEFINITIONS
1. OUTLINE OF PROJECT
1.1 Introduction
1.2 Objectives
1.3 Programme of Work
1.4 Project Planning and Control
1.5t Team
2. LABORATORY INVESTIGATIONS
2.1 Criteria for New Sizing Techniques
2.2 Rotating Probability Screen
2.3 Segregation Sizing
3. PILOT-SCALE DEVELOPMENT AND TESTING OF ROTATING PROBABILITY SCREEN
3.1 Original Design of Pilot-scale Unit
3.2 MRDE Test Screening Plant
3.3 Modifications to the Design of Pilot-scale Unit
3.A Performance of Pilot-scale Unit
4. DESIGN OF PREPRODUCTION PROTOTYPE ROTATING PROBABILITY SCREEN
4.1 Design Procedure
4.2 Design Specification
4.3 Design Progress
4.4 Manufacturing Progress
4.5 Description of Prototype Screen
5. PRODUCTION TRIAL INSTALLATIONS OF 2.4 m PROTOTYPE ROTATING PROBABILITY
SCREEN
5.1 Selection of Colliery Sites
5.2 Production Trial Installation at Bevercotes Colliery,
North Nottinghamshire Area
5.3 Production Trial Installation at Lea Hall Colliery, Western Area 6. DESIGN OF PRODUCTION ROTATING PROBABILITY SCREEN
6.1 Design Procedure
6.2 Design Modifications
6.3 Main Features of the Production Design
7. CONCLUSIONS
8. RECOMMENDATIONS
9. REFERENCES
APPENDIX. Theory of Size Separation for Rotating Probability Screen.
TABLES
1. Technical Data : 2.4 m Prototype Rotating Probability Screen
2.l Data : 2.4 m Production Rotatingy Screen
FIGURES
1. Critical Effect of Increasing Moisture Content on Mesh Blinding and
Fines Extraction with Conventional Vibrating Screen.
2. Network Plan for Development and Testing of Rotating Probability
Screen (From December 1975).
3. General View of 0.6m Rotating Probability Screen Laboratory Test Rig.
4. Sectional View of 0.6m Rotatingy Screeny Model.
5. Performance of 0.6m Rotating Probability Screen Laboratory Model (1).
6.e of 0.6mgy Screeny Model (2).
7. Performance Curves for 0.6m Rotating Probability Screen Laboratory
Model with Circular-section Spokes.
8. Performance Curves for 0.6m Rotating Probability Screen Laboratory
Model with Wedge-section Spokes.
9. Laboratory Model of Overspill Hopper Segregation Sizer - Side View.
10.y Model ofl Hoppern Sizer - End View.
11. 1.5m Pilot-scale Rotating Probability Screen : Screen Drive with Feed
System on Temporary Structure for Test Running.