基本信息:
- 专利标题： Treatment of scrap lining material from aluminium reduction cells
- 专利标题（中）：Behandlung von verbrauchtem Bekleidungsmaterial von铝-Elektrolysezellen。
- 申请号：EP84301324.4 申请日：1984-02-29
- 公开(公告)号：EP0117761A2 公开(公告)日：1984-09-05
- 发明人： Deutschman, John Edward
- 申请人： ALCAN INTERNATIONAL LIMITED
- 申请人地址： 1188 Sherbrooke Street West Montreal Quebec H3A 3G2 CA
- 专利权人： ALCAN INTERNATIONAL LIMITED
- 当前专利权人： ALCAN INTERNATIONAL LIMITED
- 当前专利权人地址： 1188 Sherbrooke Street West Montreal Quebec H3A 3G2 CA
- 代理机构： Hewlett, Arthur James
- 优先权： GB8305583 19830301
- 主分类号： C25C3/08
- IPC分类号： C25C3/08 ; C01B13/14 ; B09B3/00
摘要：
A process for treating fluoride-contaminated scrap lining material from electrolytic reduction cells comprises mixing the material with 7-30 parts of sulphuric acid and sufficient water to bring liquid content to 60-80 parts per 100 parts of lining material, mixing in sufficident liner to at least neutralise the sulphuric acid and make the slurry slightly alkaline, the slurry then being allowed to set into a solid mass.
The slurry should be of a paste-like consistency. The liner may be wholly calcium hydroxide, but a substantial proportion may be in the form of calcium carbonate.
The scrap, before or after the above treatment with lime and sulphuric acid, is preferably heated to 150-500°C in the presence of water vapour to destroy cyanides.
摘要（中）：
The slurry should be of a paste-like consistency. The liner may be wholly calcium hydroxide, but a substantial proportion may be in the form of calcium carbonate.
The scrap, before or after the above treatment with lime and sulphuric acid, is preferably heated to 150-500°C in the presence of water vapour to destroy cyanides.
从电解还原电池处理氟化物污染的废料衬里材料的方法包括将材料与7-30份硫酸和足够的水混合，使液体含量为每100份衬里材料60-80份，以足够的石灰混合， 至少中和硫酸并使浆料稍微碱性，然后将浆料置于固体中。 浆料应该具有糊状稠度。 石灰可以是完全氢氧化钙，但是相当大的比例可以是碳酸钙的形式。 在用石灰和硫酸处理之前或之后的废料优选在水蒸气存在下加热至150-500℃以破坏氰化物。
IPC结构图谱:
| C | 化学；冶金 |
| --C25 | 电解或电泳工艺；其所用设备 |
| ----C25C | 电解法生产、回收或精炼金属的工艺；其所用的设备 |
| ------C25C3/00 | 由熔融液电解法电解生产、回收或精炼金属 |
| --------C25C3/06 | .铝的 |
| ----------C25C3/08 | ..电解槽的结构，例如底、壁、阴极 |