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Browsing by Author "Van der Walt, PJ"

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Crushing of Vereeniging coal to one and a half inches top size

Author: Van der Walt, PJ Date: 1952 The run-of-mine coal is to be broken in such a manner that 55% of it has a top size 1 half inches and that the ratio between top and bottom size does not exceed 5 to 1. Read more
A graphical method for assessing the relative suitabilities of coal washing processes from float and sink and relevant data

Author: Van der Walt, PJ Date: 1949 The problem of predicting practical yield and ash values when washing coal in a specified type of washer based on float and sink data obtained from laboratory tests is discussed in this report. Read more
Handling and storage of coal

Author: Van der Walt, PJ Date: 1956 This technical report contains details on the handling and storage of plant at a coal preparation plant. Read more
Notes on the institutes coal preparation pilot plant

Author: Van der Walt, PJ Date: 1956 It is well known that there is a shortage of coking coal in South Africa, and that methods of producing suitable coking suitable coking coal from sources hitherto considered unsuitable, is receiving considerable attention. The pilot plant ... Read more
Performance of Jeffery single roll crusher installed at Van Dyksdrift colliery

Author: Van der Walt, PJ Date: 1952 A Jeffery single roll crusher was installed at Van Dyksdrift colliery with the object of producing coal suitable for firing in South African Railways locomotives. Read more
A preliminary study of the technical and economic aspects of washing a certain Witbank duff in a cyclone in order to recover the coking fraction

Author: Van der Walt, PJ Date: 1952 A detailed study was made of the various tine coal cleaning processes and it was finally concluded that the cyclone washer was the only known process which showed promise of solving the formidable washing problem. Read more
Proposed programme of work for the coal preparation pilot plant February - July 1958

Author: Van der Walt, PJ Date: 1958 On completion of the plant, all units were tested from a mechanical point of view and all apparent defects were made good. The plant was then painted ad was not operated again until after the official opening. Read more
Research on coal cleaning in progress in Britian and on the continent

Author: Van der Walt, PJ Date: 1951 This report describes how the principal objectives were to gather data relating to the practical operation and application of the various coal cleaning processes and methods of screening, breaking and handling coal. Read more
Sampling of coal with special reference preparation plant performance tests

Author: Van Eck, B ; Van der Walt, PJ Date: 1956 In this paper, the more practical aspects of coal sampling and sample treatment are discussed in order to serve as a guide in plant testing. Read more
Sizing of coal (Witwatersrand University Coal Preparation course 3rd Year Coal Mining Students)

Author: Van der Walt, PJ Date: 1956 In South African, coal is generally screened into the nominal commercial sizes such as rounds, cobbles, nuts, peas and duff. Read more
A study of the operation of the cyclone washer and its application to Witbank fine coal

Author: Van der Walt, PJ Date: 1950 Although the union of South Africa possesses reasonably large reserves of coal of various qualities, the reserves of coking coal are comparatively small and are being exhausted at an alarming rate. The proven reserves of coking coal are ... Read more
Tests carried out on the drewboy washer during the period February to August 1958

Author: Van der Walt, PJ Date: 1958 This paper presents a technical memorandum on tests carried out on the drewboy washer during the period February to August 1958. Read more

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Browsing by Author "Van der Walt, PJ"

Browsing by Author "Van der Walt, PJ"

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