本发明涉及用于为含气泡的玻璃熔体（20）的热后处理的玻璃熔化植物，特别是用于玻璃纤维的制造中的磨浆机（8）。 要容易和便宜，以减少其通过浸没燃烧器生成的玻璃熔液的起泡，磨浆机设置，其形成的槽，用于接收所述熔融玻璃（20），其中，所述玻璃通过所述浴中的前端之间熔化在输送方向（T） 和后端出口（10）。 所述托盘具有底部（11），优选两个都延伸平行于所述侧壁（21）和一个在（21）的侧壁的顶部的输送方向布置在桶向上最终上层建筑（12），其中，在所述槽的底部（11） 基本上在运输（T）延伸的屏障（18）的方向被布置在土壤调查的形式，其中每一侧上的屏障（18）至少在一个前部区域在传送方向（T）在所述桶的通道状缩颈（19），其特征在于 每个收缩（19）横向于输送方向（T）的宽度（b1）为至多0.45倍的宽度的槽的宽度（W1），优选至多0.4倍的槽的宽度，是，至少一个第一 化石加热装置（16）被提供，这是在所述上部结构（12）和/或布置在所述侧壁和所述熔融玻璃（20）从上方被加热，并且其中，在每个侧壁（21）和/或在槽的底部 在每个收缩（19）的至少一个第二电加热装置（17）被布置成伸入熔融玻璃（20）和该被加热的区域。 （图5）

The invention relates to a refiner (8) for a glass melting plant for the thermal aftertreatment of a bubble-containing glass melt (20), in particular for the manufacture of fiber glass. To easy and inexpensive to reduce the blistering of a glass melt which was generated by submerged burners, the refiner is provided, which forms a trough for receiving the molten glass (20), wherein the glass melt through the bath in a transport direction (T) between a front end and, disposed at the rear end outlet (10) flows therethrough. The tray has a bottom (11), two are preferably extending parallel to the transport direction of the side walls (21) and one on top of the side walls (21) arranged on the tub upwards final superstructure (12), wherein on the bottom (11) of the trough a substantially in the direction of transport (T) extending barrier (18) is arranged in the form of a soil survey wherein the barrier (18) at least in a front region in the transport direction (T) on each side forming a channel-shaped constriction (19) of the tub, wherein the width (b1) of each constriction (19) transversely to the transport direction (T) is at most 0.45 times the width (W1) of the trough, preferably at most 0.4 times the width of the trough, is, at least one first fossil heating means (16) is provided, which is in the superstructure (12) and / or arranged in the side wall and the glass melt (20) heated from above, and wherein in each side wall (21) and / or in the bottom of the trough in the region of each constriction (19) at least a second electrical heating means (17) is arranged which projects into the glass melt (20) and this heated. (Fig. 5)