IdEC REPORTS
6 TYPES FROM I BASIC DESIGN to meet the requirements for various applications in drying, roasting, calcining, decomposing and incinera ting
2. This Standard Model is also used as a reduction furnace with modifications to prevent air infiltration.
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4. RECIRCULATION TYPEallows control of temperature and atmosphere in the furnace through recirculation of flue gases. This permits an atmosphere of very low oxygen at low temperatures. Primary use is for regeneration and production of activated carbon and bone char.
750-2500 p.s.i.
Elongation, 73' F. Modulus of elasticity,
10-20070
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Resistance of the resin to corrosion has been only slightly compromised by combination with ceramics. Hydrofluoric acid attacks the composite, and hot concentrated alkaline solutions affect it slightly. Some fluorinated compounds cause swelling. With these exceptions, a wide range of corrosive solutions can be satisfactorily handled.
i Corrections NEW CYCLIC OLIGOMERS by J. Rinse, Id. Eng. Ckm. 56, No. 5, 42-50 (May 1964). On pages 42 and 40 of this article, the structures representing the condensed alkoxides of tetravalent metals arc incorrect. Each of the two central oxygen atoms should be attached to two metal atoms diqonaNy opporilc each other. That is, the stmcture should be:
employs burners on each hearth and provides for removal of gases from each hearth individually. Used primarily to provide control of strongly exothermic reactions, such as roasting molybdenum concentrates and salt roasting vanadium bearing slags.
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6. MUFFLE TYPE-used when combustion gases must be kept separate from reaction products, as on decomposition of various oxide ores and organic sludges.
For Oxidizing Sulphide Ores Investigate the Skinner Flash Roaster MORE THAN 40 YEARS OF ENGINEERING AN0 MANUFACTURING EXPERIENCE ON SKINNER FURNACES AND OTHER PROCESSING EIIUIPMENT
Write for New Skinner Furnace Catalog No. 163
INDUSTRIAL AND E N G I N E E R I N G C H E M I S T R Y
0.2% 1.2%
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5. CROSS DRAFT TYPE-
16
190,000
Defhmation under load 200' F., 1200 p.s.i. 500' F.. 1200 p.s.i.
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3. INDIRECT FIRED-similar to standard design except that heat i s provided through separate fire boxes with dampered flues or ducts to various hearths. This type i s used when it is necessary to pie-blend combustion gases with other gases, or when using solid fuels such as coal.
these: Tensile strength, 73' F.
73' F. p.s.1. Rockwell hardness, 73O F. R50-55 Coeff. of linear thermal 1.1 X expansion, 73-140'F. in./' F. in.
1. STANDARD D E S I G N - f o r
any application requiring simple oxidizing atmosphere and permitting contact of combustion prol!ucts with the charge, such as roasting sulphide ores, calcining limestone, regenerating clays, drying, salt and soda roasting. incineration of waste materials and sludge.
A few more specific properties of the ceramic-TFE combination are
Dept. IE-6
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CORROSION CONTROL WITH GLASS - REINFORCED HETRONS by W. A. Szymanski and R. C. Talbot, Id. E q . Chcm. 56, No. 4, 38-42 (April 1964). Second sentence of caption on page 39 should read: "For more than 2 years, it has handled saturated NaCl and KCI brines., ." The last sentence of the same caption should read: "This unit has been in service with saturated NaCl brine at 175'. . ." Caption on page 41 should read: "These tanks, fabricated from Hctron 197 by the wet, hand lay-up technique. handle concentrated HCI and 37%- formaldehyde."
