JPS563634A - Manufacture of metallic calcium - Google Patents
Manufacture of metallic calciumInfo
- Publication number
- JPS563634A JPS563634A JP7687879A JP7687879A JPS563634A JP S563634 A JPS563634 A JP S563634A JP 7687879 A JP7687879 A JP 7687879A JP 7687879 A JP7687879 A JP 7687879A JP S563634 A JPS563634 A JP S563634A
- Authority
- JP
- Japan
- Prior art keywords
- cao
- grain size
- reduction
- time
- larger
- 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.)
- Granted
Links
Abstract
PURPOSE: To economically manufacture Ca at a high reduction rate by making the grain size of CaO larger than that of a conventional method and briquetting the CaO together with Al of a specified grain size when the CaO is reduced to Ca with the Al by a vacuum hot reduction distilling method.
CONSTITUTION: CaO and Al are mixed and briquetted, and the CaO is reduced to Ca with the Al by a vacuum hot reduction distilling method. At this time, the grain size of the CaO is adjusted to 1W3mm which is larger than that of a conventional method, and the grain size of the Al to 0.2W4mm. The blending ratio of them is calculated according to the stoichiometric amounts of equation I. The reduction is carried out under the following conditions: a vacuum degree of 0.03mmHg or less, a temp of 1,150W1,200°C, and a time of severalW10hr. Metallic Ca is obtd. at a reduction rate of 90% or more. Since the grain size of the CaO is not made smaller than the necessary size, CaO crushing time and equipment are saved. In place of the Al an Al alloy may be used.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7687879A JPS5927368B2 (en) | 1979-06-20 | 1979-06-20 | Production method of metallic calcium |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7687879A JPS5927368B2 (en) | 1979-06-20 | 1979-06-20 | Production method of metallic calcium |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS563634A true JPS563634A (en) | 1981-01-14 |
| JPS5927368B2 JPS5927368B2 (en) | 1984-07-05 |
Family
ID=13617881
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7687879A Expired JPS5927368B2 (en) | 1979-06-20 | 1979-06-20 | Production method of metallic calcium |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5927368B2 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02304277A (en) * | 1989-05-17 | 1990-12-18 | Tsumura & Co | Sealing mechanism for multipoint line automatic switching device of liquid treating plant |
| WO2018116865A1 (en) | 2016-12-21 | 2018-06-28 | オリンパス株式会社 | Objective optical system for endoscope |
| WO2018235352A1 (en) | 2017-06-22 | 2018-12-27 | オリンパス株式会社 | Objective optical system for endoscope |
-
1979
- 1979-06-20 JP JP7687879A patent/JPS5927368B2/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5927368B2 (en) | 1984-07-05 |
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