Denaby and Cadeby Main Collieries

of Denaby Main, near Rotherham

1893 The company was registered on 8 August.

1927 Yorkshire Amalgamated Collieries was formed to acquire and hold the shares of the Denaby and Cadeby Main Collieries and a number of other companies

1928 'The majority of the plants for preparing and firing pulverised fuel that have been described in these columns are designed to handle coal purchased for the purpose. This coal is sometimes good, but is generally of inferior quality, as pulverised-fuel firing is admittedly a more suitable method of dealing with the latter class, but, whatever the quality, it has to be paid for. The plant, which we illustrate .... has, amongst other points of interest, the important one that it makes use of coal refuse which has hitherto not only been unsaleable but has had to be disposed of, at some cost, by depositing it in the slurry pits of the colliery concerned. This is the Cadeby Colliery, at Conisborough,the property of Messrs. Denaby & Cadeby Main Collieries, Limited. The work, for which Messrs. Fraser and Chalmers Engineering Works (The General Electric Company, Limited), Erith, were main contractors, consisted of the supply of three water-tube boilers and accessories,with the necessary pulverised-fuel plant, and fuel and ash conveyors. The previous boiler plant consisted of 21 Lancashire boilers supplying steam to the winding engines, as well as to all the varied machinery and apparatus of the colliery. The demand for increased steam capacity, coupled with the fact that the Lancashire boilers were so old as to be approaching the limits of insurability, pointed to the desirability of a new and modern plant instead of adding to the existing one. The need for economy further dictated that boilers of a higher thermal efficiency and capable of utilising what was hitherto little more than an unprofitable by-product should be employed, and indicated the adoption of water-tube boilers with pulverised-fuel plant. This scheme was accordingly put n hand, 13 of the Lancashire boilers, of which 11 were in actual operation, being removed to make room for the new plant. The pressure could not be increased on account of the winding engines, to supply which the new boilers are exclusively used, but a high degree of superheat is provided. The remaining Lancashire boilers are employed in supplying steam for the other purposes of the colliery. ....'

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