Melt container

Abstract

An object of the invention is to provide a container for holding a melt of a metal and/or a melt of a metal salt, in which a melt container allows keeping a small amount of heat radiation of the melt, suppressing penetration of the melt and development of breakage or cracking to the minimum, holding the melt suitably, and also preventing the melt from impurity contamination. The melt container of the invention is a container for holding the melt of the metal and/or the melt of the metal salt, and has, sequentially from inside of the container, a first layer constituted of a refractory having an apparent porosity of 12% or less, a second layer constituted of a refractory having a thermal conductivity (at 800° C.) of 4 W/m·K or less, and a third layer constituted of a refractory having a higher thermal conductivity than thermal conductivity of the second layer.

1 . A melt container, wherein the melt container is a container for holding a melt of a metal and/or a melt of a metal salt, and comprises, sequentially from inside of the container, a first layer constituted of a refractory having an apparent porosity of 12% or less, a second layer constituted of a refractory having a thermal conductivity (at 800° C.) of 4 W/m·K or less, and a third layer constituted of a refractory having a higher thermal conductivity than thermal conductivity of the second layer. 
     
     
         2 . The melt container according to  claim 1 , wherein when the first layer is immersed and allowed to stand for 30 days in a melt at 500° C., an amount of a material dissolved out into a melt for the material that constitutes the first layer is 0.2% by mass or less,
 the refractory that constitutes the first layer has a thermal conductivity (at 800° C.) of 15 W/m·K or more, 
 the refractory that constitutes the second layer has an apparent porosity of 20% or less, and 
 the refractory that constitutes the third layer has an apparent porosity of 12% or less and a thermal conductivity (at 800° C.) of 15 W/m·K or more. 
 
     
     
         3 . The melt container according to  claim 1 , wherein temperature at an interface between the second layer and the third layer when the melt at 500° C. is held for 30 days is lower than a melting point of the melt. 
     
     
         4 . The melt container according to  claim 1 , wherein the melt container further has a metal layer outside the third layer. 
     
     
         5 . The melt container according to  claim 1 , wherein the melt of the metal is a melt of zinc and the melt of the metal salt is a melt of zinc chloride.