On-line recovery method and device for silicon wafer cutting mortar

Abstract

The invention discloses an on-line silicon wafer cutting mortar recycling method and device, and relates to the technical field of silicon wafer cutting and production. The method comprises the following steps: firstly, performing used sand eccentric recycling on used mortar stored after cutting according to a set ratio, adding unused sand according to a set ratio based on the recycled used sand, subsequently sufficiently mixing the recycled used sand with the added unused sand to prepare recycled mortar, and feeding the recycled mortar into a cutting machine to cut silicon wafers. According to the method and the device, a PLC (Programmable Logic Controller) control module is equipped to count the recycling times of the used mortar, the PLC control module also transmits signals to a centrifugal machine and a liquid level meter, the rotation speed of the centrifugal machine is reduced gradually, the recycling ratio of the used mortar is reduced, and the addition ratio of the unused sand is increased. By adopting the method and the device, the used mortar recycling ratio and the unused sand addition ratio can be automatically adjusted according to the mortar recycling times, the total recycling rate is greatly increased, the material consumption and the production cost can be greatly lowered, and the productivity is greatly increased.

Description

Technical field [0001] The invention relates to the technical field of silicon wafer cutting production. Background technique [0002] In the solar photovoltaic industry, multi-wire cutting uses high-speed steel wires to carry mortar to cut silicon wafers. As an important auxiliary material in the production of silicon wafers, mortar has an extremely important impact on the cutting quality of silicon wafers. In the production of silicon wafer cutting, mortar consumes a large amount and accounts for a relatively high cost. Therefore, recycling of old mortar has become one of the powerful measures for photovoltaic companies to reduce the production cost of solar cells and improve economic benefits. It is the development of the entire photovoltaic industry. trend. At present, the main methods of recycling old mortar are offline recycling and online recycling. Offline recycling is to separate the old mortar through the construction of an old mortar recycling treatment plant. There a...

AI Technical Summary

Problems solved by technology

In the process of cyclically cutting silicon wafers, the recovery ratio of old mortar and the addition ratio of new mortar are a fixed value, and since the mortar still has a strong cutting ability at the initial recycling, the cutting ability gradually increases with the increase of the number of cycles. Decrease, so the proportion of recycled mortar and the proportion of new sand added to a fixed value will waste materials, which is not conducive to the reduction of material consumption and production costs

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