| Title |
Dehydration of phosphogypsum and neutralization of it's impurities in the steam of raised pressure |
| Authors |
Kaziliūnas, Antanas ; Bačauskienė, Marytė |
| Full Text |
|
| Is Part of |
Materials science = Medžiagotyra.. Kaunas : Technologija. 2007, vol. 13, no. 1, p. 57-60.. ISSN 1392-1320. eISSN 2029-7289 |
| Keywords [eng] |
Phosphogypsum ; Iimpurities ; Neutralization ; Autoclave |
| Abstract [eng] |
Wet process of impurities neutralization or their removal from phosphogypsum considerably increases the cost price of the product. Alternative principal possibilities for the treatment of dihydrate phosphogypsum into the gypsum binder by escaping wet processing are discussed in the paper. The pressure of saturated water steam is not a sufficient condition initiating a complete neutralization reaction between the acidic impurities of phosphogypsum and the neutralization admixture and determining the growth of hemihydrate gypsum crystals. Under such condition, the transfer of the materials between particles does not take place. To achieve it, the cavities between the particles should be filled with water. The offered case is based on the thickening of the mixture of natural moisture phosphogypsum and the ground carbonate solid until water emission is obtained. The prepared briquettes process in the autoclave. |
| Published |
Kaunas : Technologija |
| Type |
Journal article |
| Language |
English |
| Publication date |
2007 |
| CC license |
|
