Treatment method of broken materials of solar silicon cell pieces
A technology of silicon cells and processing methods, which is applied in the field of solar silicon industry, can solve problems such as shortage of raw materials, residual compounds, failure to meet the standard for re-smelting, etc., and achieve the effects of good removal, quality assurance, and increased availability
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[0028] Embodiment: Take the scraps of battery slices, and carry out the following steps in sequence:
[0029] a. Soak the battery pieces in 40% industrial grade hydrofluoric acid solution for more than 12 hours to remove the metal objects on the surface;
[0030] b. Soak in the mixed solution of hydrofluoric acid and ammonium fluoride. The composition of the mixed solution is: by weight, hydrofluoric acid: ammonium fluoride = 65-90%: 35-10%; rinse until the pH value is neutral ;
[0031] c. Soak in 36% industrial grade hydrochloric acid solution for more than 12 hours, rinse until the pH value is neutral;
[0032] d Soak in the mixed solution of nitric acid, hydrochloric acid and hydrofluoric acid, the composition of the mixed solution is: by weight, nitric acid: hydrochloric acid: hydrofluoric acid = 20:70:10; rinse until the pH value is neutral , forming a bare chip; soaking in a mixture of nitric acid, hydrochloric acid and hydrofluoric acid, rinsing until the pH value is...
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