. Modern mechanism, exhibiting the latest progress in machines, motors, and the transmission of power, being a supplementary volume to Appletons' cyclopaedia of applied mechanics . lag line, and does not require repair until it has been in use forsome six weeks. The consumption of manganese is very low. Theoretically it is the quan-tity required for the formation of manganese sulphide, and in practice it has been found thatthis amounts to about per cent. The proportion of manganese which the desulphurizedpig iron coming from the vessel should contain is best kept at about per cent, in
. Modern mechanism, exhibiting the latest progress in machines, motors, and the transmission of power, being a supplementary volume to Appletons' cyclopaedia of applied mechanics . lag line, and does not require repair until it has been in use forsome six weeks. The consumption of manganese is very low. Theoretically it is the quan-tity required for the formation of manganese sulphide, and in practice it has been found thatthis amounts to about per cent. The proportion of manganese which the desulphurizedpig iron coming from the vessel should contain is best kept at about per cent, in order torender the desulphurization as complete as possible. It has been found that if highly sul-phureted pig iron is poured from the blast furnace into the desulphurizing vessel, 15 to 20minutes are sufficient to effect the desulphurization requisite for the steel process. The ironin the vessel remains sufficiently fluid for several hours. It has been found quite unneces-sary to obtain heat by passing and burning a current of gas above the bath of metal. Dailyanalyses during a month at Hoerde of the desulphurized metal for the basic process gave 812 STEEL, MANUFACTURE FiQ. 8 results as follows : phosphorus ninging from 262 to 2-93 per cent. Manganese, 1-15 to 2-97per cent. ; silicon, 011 to ()-31 ; sulphur, 0035 to 0086. the percentage of sulphur beforedesulphurization being OlOO to ()481. The liobert-Bessemer Converter, Fig. 8, is described in F. Lynwood Garrisons report on the Metallurgical Ai-ts at the Paris Exhi-bition (JouTunl Franklin Institute, 1^90),which see. What is claimed as novel in the converteris a combination of several parts in a con-verter having a flat side, in which flat side areranged the tuyeres in a [)laiie horizontal tothe axis of the converter, and all in the sameplane. The tuyeres having an inclinationto enable a rotary motion to be imparted tothe metal bath, and being so disposed that bytilting the converter in the trunnions thedepth of the met
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Keywords: ., bookcentury1800, bookdecade189, booksubjectmechanicalengineering
