ISSN:0002-7820    

DOI:10.1111/j.1151-2916.1929.tb16886.x

出版商:Blackwell Publishing Ltd    

年代:1929

数据来源: WILEY

ISSN:0002-7820    

DOI:10.1111/j.1151-2916.1929.tb16887.x

出版商:Blackwell Publishing Ltd    

年代:1929

数据来源: WILEY

ISSN:0002-7820    

DOI:10.1111/j.1151-2916.1929.tb16888.x

出版商:Blackwell Publishing Ltd    

年代:1929

数据来源: WILEY

摘要:

ABSTRACTThis paper presents the results of Talwalkar‐Parmelee plasticity measurements of a number of clays, and an interpretation of the results in the light of data on dye adsorption, water of plasticity, drying and firing shrinkage, and dry transverse strength. The clays studied are mainly from California, but tests of a few more widely‐known clays from other sources are included for the purposes of correlation. Some data are given to show the effect of the addition of fine sand on the plasticity of a clay. The effect of variations in the water of plasticity is also conside

ISSN:0002-7820    

DOI:10.1111/j.1151-2916.1929.tb16889.x

出版商:Blackwell Publishing Ltd    

年代:1929

数据来源: WILEY

ISSN:0002-7820    

DOI:10.1111/j.1151-2916.1929.tb16890.x

出版商:Blackwell Publishing Ltd    

年代:1929

数据来源: WILEY

ISSN:0002-7820    

DOI:10.1111/j.1151-2916.1929.tb16892.x

出版商:Blackwell Publishing Ltd    

年代:1929

数据来源: WILEY

摘要:

ABSTRACTThis article describes briefly the deposits, formations, geology, and economic value of the mineral cyanite as found in western North Carolina.

ISSN:0002-7820    

DOI:10.1111/j.1151-2916.1929.tb16893.x

出版商:Blackwell Publishing Ltd    

年代:1929

数据来源: WILEY

摘要:

ABSTRACTEight different light‐firing clays and shales containing small amounts of insoluble vanadium and molybdenum compounds were studied. It was found that during firing, soluble salts of these elements were formed which later appeared as a green‐yellow efflorescence on the fired clay. The color of the efflorescence was chiefly due to alkali vanadates.It was found that the use of either sodium fluosilicate or calcium fluoride is effective in eliminating the green‐yellow efflorescence. The use of these chemicals is usually a more economical procedure than either hard firing or the use of lead compounds. The results of various trial firings made with clays to which were added varying amounts of several different chemicals are

ISSN:0002-7820    

DOI:10.1111/j.1151-2916.1929.tb16894.x

出版商:Blackwell Publishing Ltd    

年代:1929

数据来源: WILEY

摘要:

ABSTRACTThe following subjects are discussed: (1) heat losses in ceramic kilns, (2) early attempts at reducing heat losses from kilns, (3) properties of an ideal insulation for kilns, (4) advantages of kiln insulation, and (5) various applications of heat‐insulating material in the glass plan

ISSN:0002-7820    

DOI:10.1111/j.1151-2916.1929.tb16895.x

出版商:Blackwell Publishing Ltd    

年代:1929

数据来源: WILEY

摘要:

ABSTRACTIt is unjustifiable to assume that a furnace roof cannot be safely insulated. The principal variables controlling the possibility of safe insulation are: (1) temperature of bath below melting point of silica brick roof; (2) transparency of the atmosphere within the furnace,i.e., no possibility of impingement of dense hot flames. The data of this paper are taken from observations on a glass tank furnace in which the combustion rate (B.t.u. per cu. ft. per hr.) is very low. A testing method is described which will show whether or not insulation is safe for any given furnace, considering only the temperature of the inside face of the brick as affected by the application of insulation. The possibility that if the roof is insulated the progress of fluxing of the silica brick by dust and fumes within the furnace may be accelerated because the higher mean temperature of the brick is considered. In the furnace observed, corrosive dust and fumes were in the gases to a considerable extent, yet no unusual deterioration of the roof brick was noted after three years of insulation under continuous operation.

ISSN:0002-7820    

DOI:10.1111/j.1151-2916.1929.tb16896.x

出版商:Blackwell Publishing Ltd    

年代:1929

数据来源: WILEY