Coaltech Research Association

Develop Methods to Prevent and Control Spontaneous Combustion Associated With Mining and Subsidence

Fourth year of work at South African collieries, using borehole and infrared temperature monitoring, moisture testing and sealing trials, with control measures for opencast and underground operations.

by Dr. Nehar Eroglu & Conri Moolman | March 2003

What this report found

No standard technique for predicting, controlling or extinguishing spontaneous combustion emerged, and the methods in use proved expensive and not routinely successful. Because every mine differs, the work sets out a sequence of locating the fire, assessing the risk, choosing a strategy and method, then monitoring it. Separate control measures are given for old workings, exposed coal and spoil heaps.

R1500,00

Description

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R.P.van Wyk

BCI Chemical Research & Analysis – Eutectic Freeze Crystallisation

Jacques Magliolo

2012

Desktop market and technology review of brine from coal related waste, covering global and South African demand, plant energy use and laboratory crystalliser results, for water treatment planners.

What this report foundEutectic freeze crystallisation was compared with evaporative crystallisation as a route for treating hypersaline mine brine.

R1500,00

R1500,00

Jacques Magliolo

What this report found

Eutectic freeze crystallisation was compared with evaporative crystallisation as a route for treating hypersaline mine brine. Optimised commercial evaporative crystallisers use 40 to 50 kWh per cubic metre of feed. Laboratory work measured a eutectic temperature of -21.1 degrees Celsius for pure sodium chloride solution, and found that a large difference between coolant and solution caused scaling on the heat exchanger wall.

Liska Cronje – Ventgiene

Developing a Mechanised Cleaning System – for Cleaning Under and Around Moving Conveyors

2013

Follow on review of mechanised conveyor cleaning equipment close to being usable underground, flameproof and not, written to help the coal industry agree which options to develop.

What this report foundNo flameproof mechanised system for cleaning under and around moving conveyors was found to exist anywhere.

R1500,00

R1500,00

What this report found

No flameproof mechanised system for cleaning under and around moving conveyors was found to exist anywhere. Of more than 200 mini machinery manufacturers identified worldwide, few build for mining, and only one or two products were near ready for surface use. Manufacturer interest in mining applications has since risen, but the industry has not settled on which technology to back.

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