Boros Árpád: A diósgyőri kohászat Csavar- és Húzottáru Gyárának története 1770-2007 - Tanulmányok Diósgyőr történetéhez 19. (Miskolc, 2007)

Angol nyelvű (in English) kivonat

construction work, intensive mine exploration was performed in the Salgó area. By the end of 1870, 4 puddling furnaces, 1 ball hammer and 1 balling roll mill had been prepared, with which pilot production could be started. Other necessary equipment was gradually put into operation. On 19 November, 1871, the factory was officially opened with a ceremony. The first products of the factory included square, flat and circular rods, e.g. L, T and Z steels as well as U and I rods up to 250 mm height, coming from the roughing, middle and refining sections of the hot rolling mill. Simultaneously with the planning and construction of factory buildings, the construction of residential buildings for workers and managing experts coming from remote areas was also started. Production began in 1870-71 but the puddling furnaces did not yield the expected results although hot rolling mills could have produced more. A young (at that time only 27-year-old) engineer, Lajos Borbély, who was invited to work in the factory in 1870, found the cause of the problem in the fact that the heating value of the Salgóbánya coal did not reach that of the German coals used in Bürbach, which had served as the basis for planning. For this, Lajos Borbély elaborated the solution that instead of direct coal heating, puddling furnaces should be heated with the Siemens type regenerative heating with coal gas, at that time known all over Europe. The modified process was then patented by the company. The gas-heated puddling furnaces now operating properly, coupled with company profitability, provided a solid basis for further developments. The first step was to offer a wider range of hot rolling products. In 1876, the ridge height of the holders was increased to 12 inches and the small-section rolling mill was extended with a band hot mill. Here, band-iron was rolled with 1-4 mm thickness and 30-120 mm width as a new product. The increasing amount of rolled wire produced by the refining mill exceeded national demand while drawn wires could only be purchased from abroad. Lajos Borbély, who was technical manager of the factory from 1873, put forward a proposal in 1879 for the establishment of a new production unit introducing wire drawing and nail