| 摘要 |
<p>TITLE OF THE INVENTION: Lance pipe for refining and refining process of molten metal. A lance pipe covered with refractories having a thickness in the range 2-15 mm and a refractories 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 an 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.</p> |
