SULFITE COOKING ACID
WOOD CHIPS
TO PULP AND PAPER MILL
SPENT SULFITE LIQUOR
(TO REMOVE TRACES OF PULP IN SP. SULFITE LIQUOR)
Morotkon designed this Stoinless scrubber as part of dust collection system.
S. S. L.
REACTION TANKS -»
IMPCO ROTARY VACUUM FILTERS
EFFLUENT (3,000 FT. PIPE LINE) TO PONDS
BASIC CALCIUM LIGNOSULFONATE XT'
XT' PROCESS EFFLUENT
REACTION TANKS VACUUM FILTER
FIlTRATF TANK*.
IVA=0RATOR ï-cfcD T ANKb
TO BAROMETRIC CONDENSER •
£> I t A M
TRIPLE-EFFECT FORCED-CIRCULATION EVAPORATOR
TO SPRAY DRYERS, VACUUM DRYERS, DRUM DRYERS
Operator checks controls on Stainless Steel evaporator.
Stainless Steel stocks vent corrosive liquid from dryers.
How sulfite liquor waste
is turned into profit w i t h the help of Stainless Steel At its sulfite mill in Rothschild, Wis., the Marathon Corporation produces more than 50,000 tons of cellulose fibers per year. In the 1920's, Marathon started an intensive research program aimed at reducing river pollution from the spent sulfite liquor and recovering the 50% wastage of organic solids that resulted. By fractionating the sulfite liquor, valuable lignosulfonates could be produced; but it was strictiy a laboratory operation because the highly acid liquor corroded all normal materials—until Stainless Steel became available in the early 1930's. Since it was completed in 1936, the new plant processes all the effluent from the Rothschild plant; and it UNITED STATES STEEL CORPORATION, PITTSBURGH NATIONAL TUBE DIVISION, PITTSBURGH
·
has a capacity of 75 million pounds a year. It is the only plant in the world completely devoted to the production of fractionated lignosulfonates and approximately 50% of the equipment is made from Stainless Steel. This includes thousands of feet of 6-inch tubing, storage tanks, rotary vacuum filters, evaporators and dryers. Much of the Stainless is type 304 or 316. And much of it has been in continuous service for 15 years, compared to previous materials that disintegrated after 18 months. When designing new process equipment, frequently nothing will save more money than the careful use of long-life Stainless Steel. For service-tested quality, specify USS Stainless Steel.
• AMERICAN STEEL & WIRE DIVISION, CLEVELAND .
TENNESSEE COAL & IRON DIVISION, FAIRFIELD, ALA.
·
COLUMBIA-GENEVA STEEL DIVISION, SAN FRANCISCO
UNITED STATES STEEL SUPPLY DIVISION, WAREHOUSE DISTRIBUTORS
UNITED STATES STEEL EXPOflT COMPANY, «EW YORK
USS STAINLESS STEEL SHEETS · STRIP · PLATES · BARS · BILLETS · PIPE · TUBES · WIRE · SPECIAL SECTIONS
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