FIELD: hot-dip galvanizing waste refining.
SUBSTANCE: invention relates to the refining of hot-dip galvanizing waste, in particular to the refining of hardzinc from iron and aluminum impurities. A refining agent, aluminum, is introduced into the hardzinc melt in batches in the form of scraps of silumin with a silicon content of 7-12%, taken in a silumin/iron ratio of 1.3-1.4:1, at a temperature of the beginning of silumin crystallization of 566-577°C. First, 60% of the calculated amount of silumin scrap is introduced into the melt, and then the remaining 40% of the calculated amount, after which the melt temperature is reduced.
EFFECT: method allows to increase the productivity of the refining process while reducing the residual iron content in zinc to less than 0.01%.
2 cl, 2 ex
| Title | Year | Author | Number |
|---|---|---|---|
| METHOD OF PROCESSING ZINC WASTES | 1999 |
|
RU2147322C1 |
| METHOD OF REFINING HARD ZINC BY CENTRIFUGAL FILTRATION AND DEVICE THEREFOR | 2015 |
|
RU2585874C2 |
| APPARATUS FOR EXTRACTING ZINC FROM HARD ZINC WASTES AND METHOD OF USING SAID APPARATUS | 2023 |
|
RU2829048C1 |
| METHOD FOR REFINING HARD ZINC FROM ALUMINIUM IMPURITIES | 2021 |
|
RU2772055C1 |
| FLUX FOR REFINING PRIMARY ALUMINUM | 2022 |
|
RU2791654C1 |
| METHOD OF PURIFICATION OF MAGNESIUM FROM IMPURITIES | 2017 |
|
RU2669671C1 |
| ZINC-BASE ALLOY FOR PROTECTIVE COVER APPLYING AND METHOD OF ITS PRODUCING | 2001 |
|
RU2180014C1 |
| METHOD OF PRODUCING OF LARGE-SIZE INGOTS WITH RECTANGULAR CROSS SECTION FROM HIGH-STRENGTH ALUMINIUM ALLOYS OF Al-Zn-Mg-Cu-Zr SYSTEM | 2014 |
|
RU2561581C1 |
| METHOD OF MODIFYING SILUMINS | 1995 |
|
RU2094514C1 |
| METHOD OF PROCESSING SCRAP OF ALUMINUM ALLOYS | 1993 |
|
RU2089630C1 |
