Steenkolenwinning in Nederland

Deze publicatie bevat een gedetailleerd historisch overzicht van de voormalige kolenmijnen die Zuid-Limburg domineerden van het begin van de 20ste eeuw tot halverwege de jaren zeventig. Het mijnbouwgebied was gelocaliseerd in het zuiden van Nederland, grenzend aan Duitsland en België.

Coal mining in the Netherlands: The need for a proper assessment

In the Netherlands several billion tonnes of mineable coal remained after closure of all mines in 1974. Mining activities in Dutch Limburg were suspended relatively early in comparison to surrounding basins, of which only DSK’s Ruhr mines are still producing. In retrospective this saved the costs of uneconomic exploitation and limited further...

Improvements in separation of non-ferrous scrap metals using an electromagnetic sensor

This article describes a new method for identification and separation of non-ferrous scrap metals using an electromagnetic sensor that is based on the eddy current principle. The electromagnetic sensor (EMS) is a prototype system that has been developed by Delft University of Technology in co-operation with industry. Experimental results...

Electromagnetic De-Shaling of Coal

The efficiency with which an electromagnetic sensor array is able to distinguish density and ash content of coal and shale mixtures was determined experimentally. The investigated sensor was originally designed for automatic metal detection and sorting in industrial glass recycle processing, where it is widely applied. In coal preparation, the...

Wire Separation From Automotive Shredder Residue

The investigation discussed in this article concerned the removal of wires and cables fraction contained in automotive shredder residue (ASR) through a newly invented device, called the nail roll. Series of tests were carried out with three ASR samples of different origin and the influence of the setting parameters of the machine was analyzed....

A method and apparatus for analysing and sorting a flow of material

The invention relates to a method and an apparatus for analysing a flow of material using X rays. The method comprises radiating the material with at least two energy levels and measuring the transmission of radiation through the material for each level separately, and is characterized in that a sensor is used for measuring the radiation...

Separating Device for solid Particles

The invention relates to a separating device for solid fragments, comprising a conveyor belt for supplying the fragments, at least one sensor for detecting the fragments, and an ejector for dislodging the fragments from the belt. The ejector is embodied as mechanical impulse-transmitting organ operating in dependence on the sensor

Separating device

A sorting device (1) suitable for sorting wire from a waste stream, comprising a body (2) that moves when in use, and provided with spikes or similar projections. The body is embodied as a rotatable roll (2), which oscillates axially during its rotation. The roll is coupled to an oscillation engine (4). The spikes or similar projections are...

The Investigation of Separability of Particles Smaller Than 5mm by Eddy-Current Separation Technology - Part II: Novel Design Concepts

Separability and separation mechanisms of small particles in modern rotating type eddycurrent separators (ECSs) were discussed in Part I. In order to address problems associated with this design concept, a number of novel ECSs, each with a unique design, have been developed. Part II reports on investigation into the separability and separation...