Lance pipe for refining and method of making the same

Details Lance pipe for refining and method of making the same Lance pipe for refining and method of making the same

1979-08-02

1981-10-27

Rosenberg, P. D.

Metallurgical apparatus

Means for introducing fluent into vessel, e.g., tuyere

Having means preventing damage to introducing means, e.g.,...

75 60, C21B 716

Patent

active

042969212

ABSTRACT:
A lance pipe covered with refractories having a thickness in the range 2-15 mm and a refractoriness higher than 1800.degree. K., comprising winding the outer periphery of a pipe with a refractory fibrous thread, lace, tape or cloth having a diameter of thickness in the range 0.5-15 mm at room temperature and under normal pressure; said thread, lace, tape or cloth being impregnated and adhered with a mixture which consists of 40-90% by weight of a refractory aggregate in which most of the particle size are -10 mesh but which contains the particle size of more than 15% by weight of each of -200 mesh and 28-200 mesh, and a refractory binder as the rest which consists of one or more of silica sol including 5-40% by weight of solid parts, hydrolyzed ethyl silicate and fire clay suspension.

REFERENCES:
patent: 3982927 (1976-09-01), Saleil
patent: 4081270 (1978-03-01), Tichauer
patent: 4160664 (1979-07-01), Maruhoshi

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