Production process and curing drying equipment for solar polycrystalline silicon quartz crucible

Abstract

A production process and curing drying equipment for a solar polycrystalline silicon quartz crucible solve the problem that the wall thickness of the existing crucible is not uniform, the thermotechnical curing equipment cannot achieve the set process demands and the like. The production process is characterized in that the an organic monomer is added in quartz ceramic mud and a crucible product is obtained after the quartz ceramic mud is molded in a nonporous die; the process flow comprises the steps of melting a high-purity quartz raw material, preparing the quartz ceramic mud, pouring, solidifying and molding, curing and drying, sintering, detection, packing obtaining a finished product and storing in a warehouse. The kiln body of the curing drying equipment is of a three-layer structure, temperature measuring holes, humidity measuring holes, pressure measuring holes, hot air regulating holes and observation doors are arranged at two sides of a kiln wall of each layer of roller kiln; a circulation air pipeline, a hot air supplying pipeline, a damp air discharging pipeline and a cooling air pipeline are arranged above a metal frame; distributed control is performed by adopting a full integration automated control system, the waste heat of the a kiln furnace is furthest used under the condition of ensuring the drying quality of the quartz crucible product, and the aims of energy saving and cost reducing are achieved.

Description

1. Technical field [0001] The invention belongs to thermal equipment, in particular to a production process for solar polysilicon quartz crucible and its maintenance and drying equipment. 2. Background technology [0002] Quartz ceramic crucible is a container used to load polysilicon materials in the production process of solar polysilicon ingots, and is produced at a high temperature of 1600 ° C. Its use conditions are harsh and its technical performance is high. It is an irreplaceable key consumable material in the production process of polysilicon ingots. [0003] At present, the commonly used specifications are 720 and 900, and it is further developed to the large-scale 1100. [0004] Quartz ceramic crucible, as a container for polysilicon material, works continuously for more than 50 hours at a high temperature of 1600°C to melt and grow crystals. There are very strict requirements on the purity, strength, appearance and internal quality, high temperature performance,...

AI Technical Summary

Problems solved by technology

At present, the thermal equipment used to produce quartz ceramic crucibles usually adopts traditional roller kilns. Due to the large furnace space, it is difficult to achieve uniform heating and dehumidification when the crucibles are stacked inside. It is often difficult to meet the requirements and affect the firing kiln. product quality

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