Recovery technology of waste mortar

Solar wafers cutting liquid waste mortar is the mixture of cutting fluid (PEG) and mortar, mainly use two recovery technologies of centrifugal and settlement to deal with waste mortar, recycling the cutting fluid and silicon carbide micro powder, to return to cutting machine of the solar energy line to use again.
Because of the particularity of the solar energy industry, wafer processing for cutting force and wafer surface has high technical requirements, so the cutting fluid and silicon carbide micro powder have high requirements correspondly, quality is stable and reliable.
At present, China uses cutting fluid and silicon carbide micro powder in wire-cutting process, in the mortar will inevitably mingling with the silicon powder, iron, the impurities such as polymer, part of silicon carbide micro powder in cutting function and failure, and the waste mortar is difficult to continue to use.
Use of settlement centrifugal, chemical cleaning, flocculation filtering, distillation and extraction, and the storm classification separation principle and method, waste water and remove impurities in the mortar, can get high quality qualified cutting fluid and silicon carbide micro powder, so we can realize the second use of cutting fluids.

 

Liquid recovery process the main use of physical effects of solid particles purify, requirement not increase any soluble impurities. So get liquid can ensure that the original chemical composition, have and new cutting liquid surface activity, with the levitation force and carry force, can be repeated use.

But because the use of material recovery lower costs, domestic begin from 2007, the recovery liquid to use more and more, especially some companies in order to save the cost, the use of recovery liquid ratio to general cutting fluid use 50% or so. At present domestic manufacturers have engaged in the recovery of Qingdao sea colin, wuxi "xi, changzhou full day, etc. Silicon carbide micro powder and cutting the recovery of waste liquid accounted for 30% of the mortar and 35%.

Domestic recycling start later, recovery technology is uneven, so in the use of recovery liquid and recovery in the process of sand, often because the quality problem of the recovered materials and cause dirty piece, the line mark piece, etc. Because of this kind of recovery of the material in the using process, involving the material such as: cutting fluid (recovery liquid), silicon carbide (recovery of silicon carbide), cleaning agents, such as water, which may cause pollution of the conditions of the:

1, recovery liquid recovery quality is poor;

2, the recovery of silicon carbide contains free carbon;

3, cleaning effect is bad;

4, cleaning procedure time arrangements unreasonable, etc.

In short, as technology continues to mature, solar wafers cutting the recycling of waste liquid mortar has become the mainstream of the solar materials market, in the next two years will account for 50% of the market. Single crystal wafer cut since June 2004 in Shanghai developed belongs to China own after cutting machine, China's monocrystalline silicon cutting in domestic development have mushroomed, the rapid whose startling originality. At the same time cutting fluid amount also can meet.

After cutting fluid with abandon, unfortunately, so recovery of purification that occupy the important position, recycling reutilized, benefits the country and the enterprise. Use the purification of cutting fluid that recovery of the enterprise cost cutting greatly reduced, in the development of enterprises get benign circulation. Factory is a professional enterprise for processing for photovoltaic crystal silicon waste pulp, avoid the waste mortar to environmental pollution, renewable cutting liquid quality is good, price is excellent, completely can substitute the new fluid.