ISSN:0002-7820    

DOI:10.1111/j.1151-2916.1929.tb18026.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.tb18027.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.tb18028.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.tb18029.x

出版商:Blackwell Publishing Ltd    

年代:1929

数据来源: WILEY

摘要:

ABSTRACTThe microscopic characteristics of different crystalline materials occurring as stones or lumps in glass are described and photomicrographs of stones originating from devitrification of the glass, incomplete solution of batch constituents, and incorporation in the glass of refractory wall material are reproduced. Methods of determining the location in the glass‐making system of the source of stones, using microscopic as well as other methods, are given. Means of prevention or elimination of the stones are suggeste

ISSN:0002-7820    

DOI:10.1111/j.1151-2916.1929.tb18030.x

出版商:Blackwell Publishing Ltd    

年代:1929

数据来源: WILEY

摘要:

ABSTRACTI. In the manufacture of stiff‐mud brick from a highly colloidal clay of low permeability to water, drying breakage was extremely high even though the drying was conducted at a very slow rate under high humidity conditions. Laboratory investigation yielded two methods of correcting the faults: (1) Preheating the clay for half an hour at a temperature between 400 °C and 500 °C increased the permeability to such an extent that brick made from the preheated clay could be dried rapidly without cracking.(2) Coagulating chemicals, such as aluminium chloride, ferric chloride, sodium chloride, and hydrochloric acid, in conjunction with moderate additions of grog, increased the permeability and thus improved the drying properties of the clay. II. Plant scale tests using ferric chloride, sodium chloride, and grog resulted in the production of brick which could be dried safely in a reasonable time. The fired brick were improved in quality as to strength and color. III. The chemical treatment of the clay using 1% ferric chloride and 0.5% sodium chloride with 10 to 15% grog was adopted for plant operation and resulted in increased production, lower cost of manufacture, and improved quality of prod

ISSN:0002-7820    

DOI:10.1111/j.1151-2916.1929.tb18031.x

出版商:Blackwell Publishing Ltd    

年代:1929

数据来源: WILEY

摘要:

ABSTRACTEquations were developed which, when used in conjunction with hygrometric charts, enabled the usual waste‐heat drier calculations involving heat supply and water removal to be performed by direct substitution. These equations were used in preparing charts showing the effect of (1) atmospheric humidity conditions, and (2) air discharge temperature on the operation of a typical waste‐heat drier. The advantages which might result from the control of the initial moisture content of the air used in drying and the feasibility of using silica gel for this purpose are discussed. Changes in drier design which would permit higher exit temperatures for the air used in drying are suggested by the outcome of the calculati

ISSN:0002-7820    

DOI:10.1111/j.1151-2916.1929.tb18032.x

出版商:Blackwell Publishing Ltd    

年代:1929

数据来源: WILEY

摘要:

ABSTRACTThe principles which should be followed for the safe drying of clay products are discussed. These are as follows: (1) direction of air circulation, (2) rate of air circulation, (3) humidity, (4) the use of clear air, (5) temperature of air in drier. A pallet system is proposed as an ideal manner of arrangement in the drier for drying brick, hollow tile or drain tile, and similar heavy clay products.

ISSN:0002-7820    

DOI:10.1111/j.1151-2916.1929.tb18033.x

出版商:Blackwell Publishing Ltd    

年代:1929

数据来源: WILEY

摘要:

ABSTRACTCauses for various defects in enameled cast iron ware are traced in the enamel Photographs show the iron defects.

ISSN:0002-7820    

DOI:10.1111/j.1151-2916.1929.tb18034.x

出版商:Blackwell Publishing Ltd    

年代:1929

数据来源: WILEY

摘要:

ABSTRACTMethods and apparatus for determining certain physical properties of vitreous enamels are described. These properties are as follows: (1) resistance to thermal shock of vitreous enamels applied to flat surfaces, (2) resistance to mechanical impact of vitreous enamels, (3) resistance of vitreous enamels to abrasion.

ISSN:0002-7820    

DOI:10.1111/j.1151-2916.1929.tb18035.x

出版商:Blackwell Publishing Ltd    

年代:1929

数据来源: WILEY