Composition suitable for use in the plugging of the tapholes of

Details Composition suitable for use in the plugging of the tapholes of Composition suitable for use in the plugging of the tapholes of

1974-05-20

1976-11-30

Poer, J.

Compositions: coating or plastic

Coating or plastic compositions

Metal-depositing composition or substrate-sensitizing...

106 56, 106 58, 106 65, 106 67, C04B 3502

Patent

active

039947386

ABSTRACT:
A composition suitable for use in the plugging of tapholes of a metallurgical furnace is provided, which comprises a mixture of 60-80% refractory and erosion-corrosion resistant grain material, 12-18% binder substantially on the basis of tar products, and 4-12% bonding clay. Preferably: the binder contains 65-75% of electrode pitch, 9-11% of C.sub.2 -resins and has a viscosity less than 8000 cp. at 20.degree. C; the refractory consists 20-40% of sieve fractions of approximately 3-6 mm, the balance being of finer grains; the composition also contains ground soft coal, approximately to 10%; the refractory is burned magnesite with over 80% MgO content, or a mixture of 56-100% of Al.sub.2 O.sub.3 and from 0-44% SiO.sub.2, or a mixture containing 50-100% SiO and from 0-50% SiO.sub.2 ; and the refractory material contains impurities reducing its sintering point toward or below 1300.degree. C.

REFERENCES:
patent: 3775140 (1973-11-01), Visser et al.

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