An device for manufacturing an active alloy includes: a melting chamber including: a working pipe surrounded by an induction coil and forming a working area; a chamber base disposed below the working pipe and communicated with the working pipe, and including: a gas inlet hole; a vacuum pump connection port; and a vacuum sensor, for measuring a vacuum degree in the working pipe; a chamber door communicated with the chamber base; a first bracket passing through the chamber base, and moving towards a direction away from or near the working area; a second bracket extending into the working pipe, and moving towards a direction away from or near the working area; and a material recycling seat which can extend into the chamber base in a push and pull way.

The present invention provides a Ni-based alloy, a heat-resistant and corrosion-resistant component, and a heat treatment furnace component, all of which have excellent corrosion resistance and mechanical strength at high temperatures. The Ni-based alloy of the present invention consists of, by mass %, Al: more than 5.0% and up to 26.0%, and Zr: more than 0% and up to 5.0%, the balance being Ni and unavoidable impurities. The Ni-based alloy preferably contains more than 0% and up to 5.0% of B, by mass %, in a combined amount with Zr. Moreover, it is preferable that the Ni-based alloy has P value and Q value and satisfies a relationship of Q value ≥ 0.89 × P value - 0.53, when the P value is obtained from a formula -18.95 + 0.1956 × Ni% + 0.1977 × Al% + 0.2886 × Zr% + 12.4 × B%, and the Q value is obtained by dividing an area percentage of Ni.sub.3Al precipitated on the surface of the alloy by 100.

A method of separating a mixture of used refractory components of different chemistry types obtained from a demolished refractory includes hydrating the mixture of refractory components to destructively hydrate at least some components of the mixture of refractory components, and separating, based on size, the at least some components from other components of the mixture of refractory components.

The present invention provides a high alumina fused cast refractory that is easily produced and has low porosity and high corrosion resistance, and a method of producing the same. The high alumina fused cast refractory of the present invention has the following chemical composition: 95.0 mass % to 99.5 mass % Al.sub.2O.sub.3, 0.20 mass % to 1.50 mass % SiO.sub.2, 0.05 mass % to 1.50 mass % B.sub.2O.sub.3, 0.05 mass % to 1.20 mass % MgO and balance. The method of producing the high alumina fused cast refractory of the present invention includes obtaining a mixture by mixing an Al.sub.2O.sub.3 source material, a SiO.sub.2 source material, a B.sub.2O.sub.3 source material and an MgO source material, and fusing the mixture.

A refractory impact pad includes a bottom wall, a side wall, and a top wall. The bottom wall has a basal surface. The side wall extends from a periphery of the bottom wall. The side wall has an inner surface that at least partially encircles the basal surface of the bottom wall. The inner surface of the side wall has inner surface teeth distributed thereon and protruding inwardly from the inner surface of the side wall. The top wall is joined to the side wall and separated from the bottom wall by the side wall. The top wall extends over the inner surface of the side wall and the inner surface teeth of the side wall. The top wall has a bottom surface facing the bottom wall. The bottom surface of the top wall has bottom surface teeth distributed thereon and protruding toward the bottom wall.

Oven (1), of the type comprising a receptacle (2) of refractory material, which comprises two concave pieces (3, 4) that are joined by the edges (5) thereof with the participation of a refractory binder (6), the pieces (3, 4) comprising a recess (7) in the edge thereof to form the entrance to the oven, and mutually coupling tongue-and-groove joints (50).

Provided is a ZrO.sub.2—CaO—C based refractory material which is capable of maintaining high adhesion resistance over a long period of time, while exhibiting significant slaking resistance, and suppressing self-fluxing, i.e., exhibiting corrosion-erosion resistance. The refractory material comprises a CaO—ZrO.sub.2 composition containing a CaO component in an amount of 40% by mass to 60% by mass, wherein a mass ratio of the CaO component to a ZrO.sub.2 component is 0.67 to 1.5, and wherein the CaO—ZrO.sub.2 composition includes a eutectic microstructure of CaO crystals and CaZrO.sub.3 crystals, wherein a width of each of the CaO crystals observable in a cross-sectional microstructure is 50 μm or less.

A furnace panel for a melting furnace and a method for fabricating the furnace panel are disclosed. In particular, the furnace panel can include at least one outer wall having an inner surface; and a cast sacrificial layer carried by the inner surface of the at least one outer wall and composed of a mixture of cullet and a binder solution.

An industrial furnace for melting materials is provided. The industrial furnace includes metal components, a refractory shell, and a fill. The refractory shell is positioned to cover an inner surface of the metal components such that one or more pockets are defined between the metal components and the refractory shell. The refractory shell has an inner surface that substantially defines a melting bath in which the materials are deposited for melting. The fill is disposed in each of the pockets. 90% to 99.5% of the fill is composed of one or more magnesia materials selected from the group consisting of dead-burned magnesia and fused magnesia.

A coating is formed on a surface of a base material of a furnace, and includes a base layer and a sliding material layer that is formed on a surface of the base layer and contains an oxide ceramic and a compound having a layered crystal structure. The sliding material layer causes the collided ashes to be slipped and facilitates the drop off of the adhered ashes. The base material forms a heat transfer tube or a wall surface of the furnace. The coating is also applied to a coal gasification furnace, a pulverized coal fired boiler, a combustion apparatus, or a reaction apparatus containing a furnace.