| 配方类型： |
METALS AND THEIR TREATMENT |
| 配方说明： |
Recovering Steel Pickling Liquor (British Patent 794,386) |
| 配制方法： |
Air is blown into the liquor heated to 160'F. An aqueous paste of magnesium hydroxide is added to pH of 7.2 to 7.3. Ferric hydroxide is precipitated, filtered and washed. The magnesium sulfate solution is treated with calcium chloride to precipitate calcium sulfate. The magnesium chloride solution is drawn off and treated with slaked lime to precipitate magnesium hydroxide for reuse. |
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