The Philippine journal of science . omplished by cuttingthe bricks which cover thefurnace in such a way that theyrest on the sides of the furnaceand project or hang in the in-terior. Fig. 3 shows the furnacecovered and ready for use. Thefurnace was fired by means of a Gary hydrocarbon burner withgasoline under 40 pounds air pressure supplied by an electricmotor-driven compressor. The equipment was supplied withthe necessary valves and pressure gauges so that the exactpressure was always known and was under control. Thehydrocarbon burner^ is placeddirectly against the furnaceopening, in order t
The Philippine journal of science . omplished by cuttingthe bricks which cover thefurnace in such a way that theyrest on the sides of the furnaceand project or hang in the in-terior. Fig. 3 shows the furnacecovered and ready for use. Thefurnace was fired by means of a Gary hydrocarbon burner withgasoline under 40 pounds air pressure supplied by an electricmotor-driven compressor. The equipment was supplied withthe necessary valves and pressure gauges so that the exactpressure was always known and was under control. Thehydrocarbon burner^ is placeddirectly against the furnaceopening, in order to throw allthe heat generated into it. Atthe hot end of the kiln, thereis no opening for the clinker toemerge as in a laboratory rotary,and consequently practically allthe heat generated is throwndirectly into the kiln and re-flected back and forth aroundthe pile of cement mixture inthe interior. The material isburned uniformly to a hard, black clinker which under a mag-nifying glass shows no white spots indicating free lime. Plate. Fig. 3. The furnace covered and readyfor uso. Since a hydrocarbon burner does not work well until a temperature oflow redness has been obtained, it is desirable to place a piece of woodabout 7 centimeters square inside the furnace at the opening directly infront of the burner. This enables the burner to draw well, and preventsit from striking back. After about thirty minutes the wood is completelyburned and the interior of the furnace red hot. A piece of asbestos con-taining a hole exactly the size of the opening of the burner is placed be-tween the furnace and the burner to protect the latter from the heat. IX,A. 1 West and Cox: Philippine Cement Raw Materials 89 I, fig. 2, is from a photograph of characteristic samples of clinkerproduced in this manner. When the blocks of raw materialhave been sufficiently vitrified and the furnace has cooled, theblack clinker can easily be removed by gently tapping theclusters of blocks which are sintered togethe
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectscience, bookyear1906
