Table 4.
Liming material | Chemical formula | Neutralising value |
---|---|---|
Burnt lime | CaO | 179.0 |
Slaked lime | Ca(OH)2 | 136.0 |
Dolomitic lime | CaMg(CO3)2 | 109.0 |
Lime | CaCO 3 | 100.0 |
Basic slag | CaSiO3 | 86.0 |
Phosphogypsum | CaSO4.2H2O | 0.3 |
Mined gypsum | CaSO4.2H2O | 12.4 |
Flue gas desulphurised gypsum | CaSO4.2H2O | 0.1 |
Coal fly ash | Variable |
Italicised text shows lime as the reference against which other acid neutralising materials are compared.