Coaltech Research Association

Real-time Plant Efficiency Measurement

GJ de Korte

200230 pages

Assessment of the measurement and control equipment available to coal preparation plants, with recommendations for plant metallurgists on which instruments to add first.

What this report found

No single method gives a continuous, real time report on how a coal preparation plant is performing. Mass meters converted to yield values, on-line ash and moisture monitors, load cell chutes and automatic medium density control together supply most of what is needed. Measuring discard and slimes tonnages, particularly slimes disposal, remains the weakest point in plant accounting.

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Contents

  • INTRODUCTION4
  • OTHER CONSIDERATIONS5
  • Multiple cyclones in a module5
  • Control of medium density6
  • Control of product quality7
  • Quality of different size fractions8
  • Moisture content9
  • WHAT WE WOULD LIKE TO HAVE10
  • WHAT IS AVAILABLE?10
  • Mass meters11

How it opens

When reference is made to the efficiency of a coal preparation plant or a specific coal processing unit, the sharpness of separation is usually inferred. The sharpness of separation reflects the ability of a unit, such as a dense-medium cyclone, to selectively separate coal and non-coal particles from each other based on the difference in their relative densities.

How it concludes

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R1500,00

Description

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Laboratory work turning high ash coal fines into moulded building composites, comparing coal tar pitch against a silicone binder, with strength, burning, corrosion and leaching tests. For product developers.

What this report foundAir blowing converted coal tar into a pitch with 11.27% volatile matter and 87.68% fixed carbon, which bound high ash coal fines into structural composites.

R1500,00

R1500,00

What this report found

Air blowing converted coal tar into a pitch with 11.27% volatile matter and 87.68% fixed carbon, which bound high ash coal fines into structural composites. Compressive strengths ran from 106.58 to 344.71 MPa and flexural strengths from 48.75 to 159.30 MPa. Flammability was low across all composites and corrosion rates stayed below those of some commercial ceramic tiles.

D. S. Minney

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