GB621985A - Improvements relating to the treatment of limestone - Google Patents
Improvements relating to the treatment of limestoneInfo
- Publication number
- GB621985A GB621985A GB5758/47A GB575847A GB621985A GB 621985 A GB621985 A GB 621985A GB 5758/47 A GB5758/47 A GB 5758/47A GB 575847 A GB575847 A GB 575847A GB 621985 A GB621985 A GB 621985A
- Authority
- GB
- United Kingdom
- Prior art keywords
- flotation
- limestone
- subjected
- treatment
- magnesite
- 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.)
- Expired
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2/00—Lime, magnesia or dolomite
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
Abstract
Ground limestone containing dolomite or magnesite is freed from fine particles and then subjected to froth flotation in the presence of waterglass as a depressant for calcite and the residue from the flotation process, either directly or after further treatment (including the addition of correction materials) is used as raw material for the manufacture of cement. The limestone may be ground to a particle size below .1 mm. and particles below 10 microns in size removed before flotation in a pulp of pH value above 8.5 and which may contain alkali or alkaline earth metal carbonates. The residue from the first flotation may be subjected to a second flotation, with or without dewatering and dilution in the presence of a fatty acid or soap, at a lower pH, i.e. 7 to 8, obtained by bubbling in carbon dioxide or the addition of sulphuric or other acid. Silicates may be removed in the second flotation by a cationic reagent. A concentrate of calcite and magnesite may first be removed from the limestone and this concentrate subjected to the above treatment.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DK621985X | 1946-02-27 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB621985A true GB621985A (en) | 1949-04-25 |
Family
ID=8151761
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB5758/47A Expired GB621985A (en) | 1946-02-27 | 1947-02-27 | Improvements relating to the treatment of limestone |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB621985A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2701057A (en) * | 1952-05-29 | 1955-02-01 | Ballard H Clemmons | Concentration of iron ores by froth flotation |
-
1947
- 1947-02-27 GB GB5758/47A patent/GB621985A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2701057A (en) * | 1952-05-29 | 1955-02-01 | Ballard H Clemmons | Concentration of iron ores by froth flotation |
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