A lump that is molten, partially molten, or semi-molten is also called a molten lump. For example, (1) A portion of the ash left in a kiln by the combustion of fuel. If the ash contains a large amount of flux (a substance that, when mixed with another substance, lowers the melting point of that substance; sometimes called a flux or fluxing agent), it reaches its melting point below the temperature to which the ash is exposed, and as a result begins to melt and adhere to the grates and walls of the kiln. (2) A mass obtained by burning a mixture of limestone and clay at a temperature at which it begins to melt. This type of clinker can be ground to produce hydraulic cements such as Portland cement. (3) Brick or tile in a highly fused state, as distinguished from porous ones. (4) Bricks that have been accidentally over-fired during firing, resulting in a partially molten state and deformation. In the case of bricks, they are called over-fired bricks. [Yoichi Motoki] Source: Shogakukan Encyclopedia Nipponica About Encyclopedia Nipponica Information | Legend |
溶融または部分的に溶融あるいは半溶融状態になった塊で、焼塊(しょうかい)ともいう。たとえば次のようである。 (1)燃料の燃焼によって窯の中に残った灰の一部。灰の中にフラックスflux(他の物質に混合すると、そのものの融点を下げる物質。融剤または媒溶剤ということもある)が多いと、灰が受ける温度以下で融点に達し、その結果溶け始め、窯の火格子や壁面に融着する。 (2)石灰石と粘土との混合物を溶け始める温度で焼成して得られる塊。この型のクリンカーを微粉砕すると、ポルトランドセメントのような水硬性セメントが得られる。 (3)多孔性のものと区別して、高度に溶化した状態のれんがまたはタイル。 (4)焼成中に偶然に過焼されて部分的に溶融状態になり、変形したれんがなど。れんがの場合は過焼れんがと称する。 [素木洋一] 出典 小学館 日本大百科全書(ニッポニカ)日本大百科全書(ニッポニカ)について 情報 | 凡例 |
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