JPS5727926A - Manufacture of alumina with reduced quantity of alpha-ray radiation - Google Patents
Manufacture of alumina with reduced quantity of alpha-ray radiationInfo
- Publication number
- JPS5727926A JPS5727926A JP9878080A JP9878080A JPS5727926A JP S5727926 A JPS5727926 A JP S5727926A JP 9878080 A JP9878080 A JP 9878080A JP 9878080 A JP9878080 A JP 9878080A JP S5727926 A JPS5727926 A JP S5727926A
- Authority
- JP
- Japan
- Prior art keywords
- tank
- classifier
- soln
- underflow
- fed
- 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 manufacture alumina with a surely reduced quantity of α-ray radiation by conducting the operation of a deposition tank depositing aluminum hydroxide from a soln. obtd. by treating bauxite with sodium aluminate under specified conditions.
CONSTITUTION: A sodium aluminate soln. F obtd. by treating bauxite with a sodium aluminate soln. and separating undissolved residue as red mud is fed to a deposition tank 1 capable of being kept at a constant temp., and the underflow S of a classifier 7 contg. fine aluminum hydroxide particles used as seed is added to the tank 1. The contents of the tank 1 are drawn out of a suitable part of the tank 1 and fed to a classifier 6 in an amount corresponding to the total amount of the soln. F and the underflow S. Relatively coarse aluminum hydroxide particles are taken out of the underflow H of the classifier 6 as a product, and the overflow is fed to the classifier 7. Thus, deposition is carried out in one deposition tank under conditions satisfying the equation.
COPYRIGHT: (C)1982,JPO&Japio
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9878080A JPS5727926A (en) | 1980-07-21 | 1980-07-21 | Manufacture of alumina with reduced quantity of alpha-ray radiation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9878080A JPS5727926A (en) | 1980-07-21 | 1980-07-21 | Manufacture of alumina with reduced quantity of alpha-ray radiation |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5727926A true JPS5727926A (en) | 1982-02-15 |
| JPS6234686B2 JPS6234686B2 (en) | 1987-07-28 |
Family
ID=14228877
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9878080A Granted JPS5727926A (en) | 1980-07-21 | 1980-07-21 | Manufacture of alumina with reduced quantity of alpha-ray radiation |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5727926A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61183415A (en) * | 1985-02-07 | 1986-08-16 | Nippon Kokan Kk <Nkk> | Cooling method of strip in continuous heat treatment furnace |
-
1980
- 1980-07-21 JP JP9878080A patent/JPS5727926A/en active Granted
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61183415A (en) * | 1985-02-07 | 1986-08-16 | Nippon Kokan Kk <Nkk> | Cooling method of strip in continuous heat treatment furnace |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6234686B2 (en) | 1987-07-28 |
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