Document m6jmY4br01Dvv9826L8D0Qog

ASBESTOS TEXTIy I1ISTITUTE ABSTRACTS Vol. 1, No. 1, 1952 fm HYGIENE: l. Electrical Method for Investigatine'the Nature and Behavior of &/ Snail, Air Borne, Charged Particles, J. H. Daniel and F. S, Brackett, J. Ap. Phys, 22:542-54. My '51. - $Zi' Engineering Phases of Plant Health Control. 17. A. Cook. ^ Chen. Cz Eng. 1J. 29:1517-18. Apr. 16 *51, /Si ?*'; 0 >^4 v H~: Y,;5. A- M f'pv'-' . 'i6, Health and Air Pollution. A Study on a Limited Budget. H. Heirmann.' A. M. A.'Archives. Ind. Hygiene Cz Occup. Med. 3:399-407. Ap. *51. ` ' Investigation of Snail, Air Borne, Charged Particles by an Electrical Method. J. H. Daniel. F. S. Brackett. A.M.A. Archives. Ind. Hygiene & Occup. Med. 3:505-19. May *51. ' Plant Designed for Employees* Welfare; Controlling asbestos dust at Asten-Hill Mfg. Co. Arch. Rec. 110:121-3 N *51. . Check List of Air Pollution Control Ordinances. Iron Age 169:454. Ja 3 *51. ' *7. *-&. 'Ife:; -tp :'i't m j' Vp g 7 a f. g ' . t: y Sonic Agglomeration--A New Solution. Eng. 58:154-156, May 1951. Gordon Kiddoo, Chen. .. . In a sonic agglomeration aerosols--dusts, smokes, fumes, fogs or nists--are subjected to high-intensity sound. This sound causes the gas-borne pollutants to vibrate, collide and adhere together in clusters of different size for removal from the gas phase in a secondary separator such as a cyclone. The effeciency of sonic agglomeration is dependent upon 1) the frequency of the sound, 2) the size of particle, o) the density of the particle and 4) the velocity of the gas. Ordinarily, only the first two factors are of commercial importance. The primary factor of a sonic agglomeration is to agglomerate the aerosol particles into larger particles of sufficient size to permit their removal from the gas in a secondary collection, Little separation of the pollutants from the gas if effected in the agglomerator itself. The particle collection efficiency of a sonic agglomeration system can be increased by introducing a fine spray of water into the agglomeration chamber. Devices1 for the generation of sound fall into three groups': 1) piston, 2) whistle and 3) siren. The piston-type sound generator includes magnetostriction devices, electro-magnetic devices and piezoelectric crys'tals. These aro essentially low out-put devices and have not had large commercial application. Whistles have such low efficiencies that they are of no'-interest. The siren-type sound generators develop large amounts of power and are being successfully used in commercial application. TECHNICAL : Hov/ to Apply Insulation on 8 team Turbines. Power Eng. 55:76-7. S 151. 9. Two Ways to Insulate Flanges, Valves and fittings. R. L. Davis. Pet. Eng. 23: C 54 J1 15 <51. .10 Double Insulations for Safe Service. Safety Maint. & Prod. 101:51. Ap. *51. .11 Heat Insulation'V. J. D. Blakeley The Steam Engineer XXI, 347, 269-72, Ap. <52 Comparative performance as'heat insulators evaluated for ' 1) 35^ magnesia, 2) Kieselguhr, 3) white asbestos (chrysotile), 4) Fav/n asbestos (amosite), 5) Blue asbestos (crocidolite), 6) glass wool and glass silk, 7) Rock wool and slag wool, 8) Expanded materials such as foamed concretes and slags, insulat ing refractory brick, expanded polymers, expanded virmiculite and related micaceous materials. Thermal conductivity curves , for rigid slabs and pipe sections reveal that rigid rock wool slabs'10 lbs per cubic foot exhibit best performance above 500F. 12. Heat Insulation IV. J. D. Blakeley. The Steam Engineer XXI, 246, 223-225. Limiting hot faoe temperatures for various insulating materials are listed as follows: Insulating Material Limiting hot face temp. Laminated Cellulose paper Cork Asbestos 4- 20^ cotton Asbestos t 5 ^ cotton Glass fibre with starch bond 85^ Magnesia Asbestos-unbonded Asbestos-bonded with silicate of soda glass fibre-unbonded Rock wool Kieselguhr-raw Kieselguhr-calcined 150 160 300 450 500 575 800 900 950 1200-1400 1600 1800 GENERAL 15. Magnitude of Canadian Asbestos Industry. P. li. Malouf. Can, Min. J. 72:84-6 S >51.