Bisbee daily review., 1920-02-12
ORIGINAL PLAN CLEARS WATER OF IMP PURITIES
 FOR MINE USE
Copper Queen Chemists Use Purified Seepage for
 Making Steam

ing on extensive mining operations in an arid country is to procure water suitable for boiler purposes and with the inauguration of the tremendous task of removing Sacramento Hill, with its steam shovel engines, power house boilers and railroad engines, the Copper Queen company sought TOT a solution of the problem.
 Prior to 1919 the company had used Naco water and a lime soda plant. The water was not only expensive put the plant did not give satisfactory re- sults as by this system the impurities are still left in the water in an alter ed form. The result was trouble Wltn the boilers. If impure water IS used in the boilers they soon become en crusted. with resultant loss of effl- cieney and increase in fuel cohsump- ton.
 There was plenty of water in the Junction mine, but on account or us mineral content it was useless as It came from the mine. The plan or purifying this water was hit upon. IL was a difficult and unusual scheme but exhaustive analysis of the water was made to determine just what was necessary to soften it and make It us able. Acting on the result Of these tests the present water softening plant was erected.
 Water is pumped from the Junction mine into two tanks on the hill above the softener. Here the suspended matter. probably iron in various forms. is allowed to settle. AS this water comes from the mine IL IS muddy yellow color with a variety oi contents that would clog up the ooli' ers and that make it altogether use less. From these two tanks it is carried by gravity to the purifier. It emptles into a tank on top of cone shaped tower where it is mixed with lime oy a macmillan "cone within a cone" ar raneement, through which it passes At the bottom of the tank the sedl ment or 'sludge" is drawn off. The water then passes from this first treatment into another tank where Il is treated with barium carbonate. This treatment takes care of the sulphates still present in the water.
 The secret of the process lies in the nroper mixing of the chemicals that are introduced into the water to pre- eipitate the encrusting solids that arc ruinous to boilers, and to keep other impurities under chemical control anC render them harmless. The plant l' almost automatic in operation after i has once been regulated.
 The plant turns out 1S0,OOO gallon: of almost pure water every "A hours to the boilers. Tests are made Of tht water every hour to determine causti city. alkalicity and hardness of raw and treated water. =
 Barium. carbonate is used, S.6- pounds per thousand gallons treated and lime. 2.09 pounds per thousand gallons. It was found that the bariun was not all exhausted in the frs treatment and so, to save 1t, an ar rangement was made whereby it II pumped through a second time.
 To be successful the treatmen must be regulated exactly by the ana lysis of the raw water. It was fount . thaat after heavy rains the treatmen had to be changed somewhat as th' seepage of water into the min changed its contents.
 From the purifier the water Il pumped to storage tanks from whlcl fl is supplied to the boilers. Afte the water has passed through the az paratus it comes out clear and soft
 The plant is under the direct super vision of c. H. Compton, who is Il charge of the assay office and mill
 An analysis of the raw and treated water gives the following results:
 Hard Treated
 water wate