PREPARING THE MIXTURE FOR THE KILN. 415 



established for some time in this country, several others are in course of 

 construction at present, and it seems probable that in the near future 

 Alabama will join Illinois and Pennsylvania as an important producer 

 of Portland cement from slag. 



References on slag-limestone mixtures. 



(The more important articles are preceded by an asterisk.) 



Eckel, E. C. Preparation of slag limestone mixtures. Municipal Engineering, 



vol. 25, pp. 227-230. 1903. 

 Hughes, 0. J. D. Portland cement from slag. U. S. Consular Reports, No. 



1700, July 18, 1903. 



* Jantzen. Utilization of blast-furnace slag. Stahl und Eisen, vol. 23, pp. 



361-375. 1902. Journ. Iron and Steel Inst., 1903, No. 1, pp. 634-637. 

 Kammerer. Von Forell's process for the production of Portland cement from 

 basic slag. Stahl und Eisen, vol. 19, p. 1088. 1899. Journ. Soc. Chem. 

 Industry, vol. 19, p. 48. 



* Lathbury, B. B., and Spackman, H. S. The Clinton Cement Company's 



plant, Pittsburg, Pa. The Rotary Kiln, pp. 82-85. 1902. 



May, E. Slag (Portland) cement. Stahl und Eisen, vol. 18, pp. 205-211. 

 1897. Journ. Iron and Steel Inst., 1898, No. 1, pp. 461-464. 



Schiele, F. Manufacture of Portland cement from slag at Lollar, Germany. 

 Proc. Inst. Civ. Engrs., vol. 145, pp. 119-120. 1901. 



Steffens, C. Portland cement from slag in Germany. Stahl und Eisen, vol. 20, 

 pp. 1170-1171. 1900. Journ. Iron and Steel Inst., 1901, No. 1, pp. 439- 

 440. 



Von Forell, C. Patent Portland cement from slag. Journ. Soc. Chem. Indus- 

 try, vol. 19, p. 50. 1899. 



* Von Schwarz, C. The utilization of blast-furnace slag. Journ. Iron and 



Steel Inst., 1900, No. 1, pp. 141-152. Engineering News, Sept. 27, 1900. 

 Engineering Record, June 2, 1900. 



* Von Schwarz, C. Portland cement manufactured from blast-furnace slag. 



Journ. Iron and Steel Inst., 1903, No. 1, pp. 203-230. 



(3) Blast-furnace Methods of Making Cement. 



Attempts have been made to manufacture Portland cement by 

 mixing the raw materials without grinding and burning the mixture 

 to a state of complete fusion in a kiln resembling a blast-furnace in de- 

 sign and action. The Hurry and Seaman patents covering a method 

 of this type are described as follows:* 



Raw materials containing carbonate of lime, silica, and alumina 

 are mixed with carbonaceous fuel, the combustion of which is supported 



* Journal Soc. Chem. Industry, vol. 21, p. 1079. 1902 



