JPS5688825A - Melted lime and its production - Google Patents
Melted lime and its productionInfo
- Publication number
- JPS5688825A JPS5688825A JP16620379A JP16620379A JPS5688825A JP S5688825 A JPS5688825 A JP S5688825A JP 16620379 A JP16620379 A JP 16620379A JP 16620379 A JP16620379 A JP 16620379A JP S5688825 A JPS5688825 A JP S5688825A
- Authority
- JP
- Japan
- Prior art keywords
- melted
- lime
- raw material
- hydration
- calcic
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Abstract
PURPOSE: A raw material only composed of calcic substance is melted at high temperatures to form a melted lime, which is treated with carbon dioxide under heating to produce melted lime with high hydration resistance, thus showing no reduction in refractory and noncorrodible properies.
CONSTITUTION: One raw material only composed of calcic substance or 2 or more kinds of raw materials is melted by heating up over about 2,500°C. The heat melting is conducted by generating arcs between graphite electrodes and between the graphite electrode and the charged raw material. The molten material is cooled and crushed into lumps of fist or small sizes and the lumps are heat treated in a gas atmosphere containing carbon dioxide at a temperature lower than 850°C. The carbonation treatment forms dense and hydration-resistant films of calcium carbonate on the surface of the melted lime to give the melted lime with high hydration- resistance without addition of another oxide. The raw material is e.g., lime, limestone, calcium carbonate, chalk or calcium hydroxide.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP16620379A JPS5688825A (en) | 1979-12-20 | 1979-12-20 | Melted lime and its production |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP16620379A JPS5688825A (en) | 1979-12-20 | 1979-12-20 | Melted lime and its production |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5688825A true JPS5688825A (en) | 1981-07-18 |
Family
ID=15826995
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP16620379A Pending JPS5688825A (en) | 1979-12-20 | 1979-12-20 | Melted lime and its production |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5688825A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6090858A (en) * | 1983-10-21 | 1985-05-22 | フアイザー・クイグレー株式会社 | Digestion-resistant refractory aggregate containing free lime and manufacture |
-
1979
- 1979-12-20 JP JP16620379A patent/JPS5688825A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6090858A (en) * | 1983-10-21 | 1985-05-22 | フアイザー・クイグレー株式会社 | Digestion-resistant refractory aggregate containing free lime and manufacture |
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