A high-efficiency ingot casting furnace with heat balance

Abstract

The present invention discloses a high -efficiency ingot furnace with a calorie balance.The body, the fixing connection on the top of the upper furnace body is equipped with a installation board, which is equipped with an empty cavity between the installation board and the top of the inside of the oven.The interior of the furnace body is set up from the inside to the outside with a heating control mechanism and the heat control organization.The phenomenon of uneven heat distribution caused by the calories at the top during the heating process of the ingot furnace was increased, which increased the melting speed of polysilicon raw materials, shortened the processing time, increased the utilization rate of calories, and effectively reduced the waste of energy.

Description

technical field [0001] The invention relates to the technical field of ingot casting furnaces, in particular to a heat-balanced high-efficiency ingot casting furnace. Background technique [0002] The ingot casting furnace is a professional equipment used to prepare solar-grade polycrystalline silicon ingots. With the vigorous rise of the photovoltaic industry, it has developed rapidly. The production process of polycrystalline ingots is actually a process of melting and recrystallizing silicon materials. Vacuum, heating, melting, crystal growth, annealing, cooling, furnace and other processes; [0003] However, in the process of producing polysilicon in the current ingot casting furnaces on the market, in order to obtain low-defect high-quality silicon ingots, the raw materials need to be melted gradually from top to bottom, and the molten raw materials in the crucible are also required in the crystal growth process. The crystal grows vertically from bottom to top, so that...

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Problems solved by technology

[0004] The present invention provides a heat-balanced high-efficiency ingot furnace, which can effectively solve the problem that in the process of producing polysilicon in the ingot furnace proposed in the above background technology, in order to obtain low-defect high-quality silicon ingots, it is necessary to start from above when the raw materials are melted. And the bottom gradually melts, and the molten raw material in the crucible is also required to grow crystals vertically from bottom to top during the crystal growth process, so that the heater in the ingot furnace needs to be arranged on the top of the ingot furnace, which leads to the ingot casting process during the heating and melting process. The heat in the ingot furnace is mainly concentrated at the top, which slows down the melting speed of the raw materials in the lower layer of the crucible, thereby prolonging the heating time, reducing the processing efficiency, and causing a waste of energy.

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