. Machinery for metalliferous mines : a practical treatise for mining engineers, metallurgists and managers of mines. th its load of ore, can thus be wound up theshaft and dropped on to another frame at the surface; or it can betransported, with its load, by an aerial tram placed on a fresh frameworkat the end of its journey, thus avoiding the carriage of useless weight. For mining purposes the double side-tipping waggon, shown in fig 373,is largely used. The special form of the tub admits of large capacity without greatwidth, and allows the waggon to pass through narrow drives. It is also TRA
. Machinery for metalliferous mines : a practical treatise for mining engineers, metallurgists and managers of mines. th its load of ore, can thus be wound up theshaft and dropped on to another frame at the surface; or it can betransported, with its load, by an aerial tram placed on a fresh frameworkat the end of its journey, thus avoiding the carriage of useless weight. For mining purposes the double side-tipping waggon, shown in fig 373,is largely used. The special form of the tub admits of large capacity without greatwidth, and allows the waggon to pass through narrow drives. It is also TRAM WAGGONS. 547 very suitable for work on the surface. By the use of four pairs oftrunnions a large tipping angle is obtained, the material thus emptyingfreely. The general construction of the waggon is similar to the other formsof tip waggons. The under-frames are of channel steel and the trunnionsupports of angle steel. The drawbar passes throughout the length of the under-frame, forminga central stay. The waggons are fitted with axle boxes, steel axles, and chilled iron orsteel wheels. ^^;-^^«tmm?ffII]Tll1 °. Fig. 373.—Double Side-tipping Waggon. The usual sizes of these waggons are 10 cubic ft., and 16 cubic on a guage of 18 in. to 24 in. For the purpose of controlling and ascertaining the daily output of themine the waggons should be weighed, and their weight painted on theside. Before entering the mill the loaded w^aggons should all be weighed,and the net weight of the ore entered in a book kept for that weighing of the crude ore, taken in conjunction with the samplingunder the rock-breaker, will give the daily value of the ore treated, whilethe weight and assay of the concentrated ore will give that of the outputof the mill. The difference between the two will be the amount of loss in treat-ment, and to this little difference the manager cannot pay too muchattention. 548 MACHINERY FOR :\IETALLIFERGUS MINES. Traction Engines.—The use of the t
Size: 1860px × 1344px
Photo credit: © Reading Room 2020 / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1900, bookpublishernewyo, bookyear1902
