Abstract: A process for fixing wear-resistant armoring tiles to cement mortar. In accordance with the process, the back sides of the tiles are coated with a mixture of polyester epoxy resin composition including sand and quartz or sand powder, with a curing agent. A material having an affinity for the cement mortar (like quartz sand or lavalite) is dusted and rolled into the coated back side of the tiles, so as to thoroughly be mixed up with the resin mixture coating. After the hardening of the coating including the material having affinity to cement mortar, the tiles are embedded in the cement mortar. Accordingly, this process substantially eliminates the well known poor adhesive properties of such tiles with respect to cement mortar.

Abstract: A gate for casting molten material, including smelting basalt, in spin-casting molds. The gate includes a curved channel, and means for cooling the channel so as to attain a temperature required for mold spinning operations. The channel includes a main vertical section having a steep impact zone, a drawn-back inlet section and an inclined horizontal end section.

Abstract: A forehearth of a smelting furnace which includes a weir used in conjunction with a float essentially in the form of a U disposed in a horizontal position, with the opening of the U disposed adjacent to the discharge opening of the weir, the float having a thickness sufficient to act to dam or stop passage of molten material from the forehearth through the weir, but allowing such molten material to pass under the float, and through the opening of the U, and thence through the discharge weir.