Production method for improving success rate of multiple rods

Abstract

The invention relates to a production method for improving the success rate of multiple rods. The production method comprises the following steps: S1, raw material treatment; S2 furnace cleaning operation; S3 feeding; S4 material fusing; S5 secondary feeding; S6 neck guiding; S7 diameter enlarging transferred to be diameter equalizing; S8 ending and S9 taking out, wherein in S2 furnace cleaning operation, an exhaust funnel is subjected to heat preservation soaking for 20-30 minutes with No. 100 vacuum pump oil at the temperature of 40-45 DEG C, then subjected to roll coating through No. 25 transformer oil at the temperature of 20-30 DEG C, and finally soaked in metal processing oil for 10 minutes. The production method utilizes an oily matter to process an exhaust funnel, the problem thata waste gas hole is blocked in a multiple rod drawing process is effectively solved, the in-furnace impurity content is lowered, the cleanness in a furnace is improved, the monocrystal drawing periodis shortened, and the success rate of the multiple rods and the integral rod rate are increased.

Description

technical field [0001] The invention relates to a production method for improving the success rate, in particular to a production method for improving the success rate of multi-rods. Background technique [0002] At present, more than 75% of the materials for producing solar cells in this field come from silicon rods. The general production process of silicon rods is: charging → chemical materials → pulling single crystal → taking rods → stopping and cleaning the furnace, each furnace Only one crucible can be produced. After the production is completed, it is necessary to clean the furnace and replace the crucible, which consumes a long time and has low production efficiency. Under market pressure, improving production efficiency has become the only way for enterprises to participate in competition, and multi-rod production has emerged as the times require. Most manufacturers have adopted a single-repeated production process. For example, CN102345157 A discloses a solar Czoc...

AI Technical Summary

Problems solved by technology

[0002] At present, more than 75% of the materials used in the production of solar cells in this field come from silicon rods. The general production process of silicon rods is: charging → chemical materials → pulling single crystal → taking rods → stopping and cleaning the furnace. Only one piece can be produced. After the production is completed, the furnace needs to be cleaned and the crucible replaced, which takes a long time and reduces production efficiency.

Under market pressure, improving production efficiency has become the only way for enterprises to participate in competition, and multi-rod production has emerged as the times require. Most manufacturers have adopted a single-repeated production process. For example, CN102345157 A discloses a solar Czochralski monocrystalline silicon The production method of continuous re-injection includes the following sequential steps: first loading→first chemical material→secondary feeding→secondary chemical material→pulling single crystal→rod extraction→re-injection→chemical material→pulling single crystal→rod extraction →re-injection→chemical material→pulling single crystal→removing rods→shut down and clean the furnace, but multi-rods can reduce the cost of quartz crucible, but the success rate is still low, about 45%, resulting in an increase in the cost of electricity, The decline in production, how to improve the success rate of multi-rods and increase production is imminent

Images