新型铸锭炉制造技术研究

发布时间：2019-01-08 07:33

【摘要】：多晶硅铸锭是整个光伏产业链中的基础工序,而铸锭炉则是硅锭铸造中所使用的设备,也是太阳能电池生产环节中非常重要的一种设备。多晶硅的制造是利用浇铸或定向凝固的铸造技术,得到熔融态的硅液,通过特定工艺的调整,将杂质分离出来,并且达到太阳能电池发电所要求的氧碳含量等,最终将熔液凝固成硅锭。这样,就可切片供太阳能电池使用。本文结合目前先进的铸锭工艺以及市场需求,研制出具有国际先进水平的装料量为800Kg-1000Kg的G6型多晶硅铸锭炉,同时能够生产普通多晶硅锭、高效多晶硅锭、准单晶硅锭,掌握设备的关键技术及铸锭工艺,并实现设备的产业化。在铸锭炉的研制过程中,对铸锭炉的机械部分、电气控制部分、石墨热场部分以及工艺部分进行了分析和设计,使其满足预设目标。新型铸锭炉的制造参考GT炉型,对铸锭炉的机械部分、电气控制部分、石墨热场部分以及铸锭工艺进行研究改进,制造出新型G6铸锭炉。热场设计方面,采用热场模拟软件对石墨热场进行设计。通过对设备及工艺的安装调试,不断对工艺进行调整,以达到技术要求。通过研究与设计,达到设置的预期目标。成功制造出具有国际先进水平的多晶硅铸锭炉,使其能够生产出800Kg-900Kg硅锭,且铸锭炉具有升级空间,能够升级使其产量达到1000Kg-1200Kg。对研制出的多晶硅铸锭炉进行生产使用,使用中硅锭的生产速率达到1.0-1.2cm/hr,单位能耗小于7度/Kg,铸锭良率大于70%,转换效率大于17.2%。本装置的成功研制降低了设备的采购价格,为本单位公司各个基地扩建项目的设备采购降低了成本。
[Abstract]:Polycrystalline silicon ingot is the basic process in the whole photovoltaic industry chain, and the ingot furnace is the equipment used in the silicon ingot casting, and it is also a very important equipment in the production of solar cells. The manufacture of polysilicon is to use casting or directionally solidified casting technology to obtain molten silicon liquid, through the adjustment of a specific process, the impurities are separated out, and the oxygen and carbon content required for solar power generation is reached. The melt is finally solidified into a silicon ingot. In this way, it can be sliced for use by solar cells. In this paper, according to the advanced ingot technology and market demand, a G6 type polysilicon ingot furnace with international advanced loading capacity of 800Kg-1000Kg has been developed. At the same time, it can produce common polysilicon ingot, high efficiency polysilicon ingot and quasicrystalline silicon ingot. Master the key technology of equipment and ingot technology, and realize the industrialization of equipment. In the development of ingot furnace, the mechanical part, electrical control part, graphite thermal field part and process part of ingot furnace are analyzed and designed to meet the preset target. The manufacture of the new ingot furnace is referred to the GT furnace mold. The mechanical part, electrical control part, graphite thermal field part and ingot process of the ingot furnace are studied and improved, and a new type of G6 ingot furnace is manufactured. In the aspect of thermal field design, the thermal field of graphite is designed by using thermal field simulation software. Through the installation and commissioning of the equipment and process, constantly adjust the process to meet the technical requirements. Through research and design, achieve the target of setting. The polycrystalline silicon ingot furnace with international advanced level has been successfully manufactured, which can produce 800Kg-900Kg silicon ingot, and the ingot furnace has the upgrade space and the output can reach 1000Kg-1200Kg. For the polycrystalline silicon ingot furnace, the production rate is 1.0-1.2 cm / h, the unit energy consumption is less than 7 degrees / Kg, ingot yield is more than 70 and the conversion efficiency is more than 17.2%. The successful development of the device reduces the purchase price of the equipment and reduces the cost of the equipment purchase for the expansion project of each base of the company.
【学位授予单位】：华北电力大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TN304.12

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