Flocculant-dispersant agents for copper ores

The electric hotplate is described has a laminated structure in which the heating element comprises strips of positive temp. coefft. of resistance material R on an insulating substrate. The strips are connected in a series parallel arrangement between conductors A,X,Y,Z and B. The interconnecting co...

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Bibliographic Details
Main Authors BARBARO MARIA, BARBUCCI ROLANDO, MARABINI ANNA, NOCENTINI MILA
Format Patent
LanguageEnglish
Italian
Published 26.08.1987
Edition4
Subjects
CHEMISTRY
FERROUS OR NON-FERROUS ALLOYS
METALLURGY
PRETREATMENT OF RAW MATERIALS
PRODUCTION AND REFINING OF METALS
TREATMENT OF ALLOYS OR NON-FERROUS METALS
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Summary:The electric hotplate is described has a laminated structure in which the heating element comprises strips of positive temp. coefft. of resistance material R on an insulating substrate. The strips are connected in a series parallel arrangement between conductors A,X,Y,Z and B. The interconnecting conductors X,Y and Z are of a material with a negative temp. coefficient of resistivity. Strips are screen printed or the ceramic be insulative covering of a metal plate from a viscous ink of powdered nickel or cobalt plus glass.
Bibliography:Application Number: IT19840048568