File:Image from page 16 of "The Mexican mining journal" (1905).png

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English: Identifier: mexicanminingjou1920unse

Title: The Mexican mining journal Year: 1905 (1900s) Authors: Subjects: Mines and mineral resources Publisher: Mexico City : Mexican Pub. Co. S.A.


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Text Appearing Before Image: level. As such they are the mostefficient and economical means for the purpose known.The design of a pump is to handle pure liquids only.Its valves and passages are arranged on the presump-tion that the material passing through them will flowfreely in all directions, will not deposit solids and willremain uniform. It is, therefor, not fair to require a pumps for work on slime should have no large horizon-tal passages or chambers in which the coarser portionsof the pulp might settle out. Special valves are some-times provided for slime pumps, depending upon thenature of the material handled. It is almost impossibleto handle some pulps in pumps of the plunger type,especially if the pressure is considerable. Sharp quartzslime, even when very finely ground, has been knownto cut out valves in a few hours in spite of every ing-enuity of design and care in the selection of material.Centrifugal pumps used for slime are commonly fittedwith removable steel liners which may be renewedwhen worn.

Text Appearing After Image: Courtesy Mexico View Co. Cía. Santa Gertrudis, Pachuca, Hgo. pump to handle material that is only partially liquidor contains grit or solids in suspension. With certain modifications liquids carrying certainsolids in solution or suspension may be handled, butto assume that any pump may be installed for raisingpulp because some other pump does this work suc-cessfully must lead to disappointment. Pumps should be designed and fitted for the workthey are expected to do. For handling corrosive liquidsspecial linings are employed according to conditions,linings of wood, cement, special bronzes or porcelainbeing used. Pumps for lifting acids are in some casesfitted with stoneware cylinders and plungers. Plunger * Engineer with Victor M. Braschi Machinery Co. Inc. Pumps are built to run at a certain speed whichfor the size and make is the most economical. Attemptsare occasionally made, and not necessarily in thedistant wilds either, to increase the capacity of a pumpby merely speeding it up,mexicanminingjou1920unse


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Source Image from page 16 of "The Mexican mining journal" (1905)
Author Internet Archive Book Images

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